Merge 'origin/master' into 3391.codecov-yml

.appveyor.yml

@@ -1,95 +0,0 @@
-# adapted from https://packaging.python.org/en/latest/appveyor/
-
-environment:
-
-  matrix:
-
-    # For Python versions available on Appveyor, see
-    # http://www.appveyor.com/docs/installed-software#python
-    - PYTHON: "C:\\Python27"
-    - PYTHON: "C:\\Python27-x64"
-    #  DISTUTILS_USE_SDK: "1"
-    #  TOX_TESTENV_PASSENV: "DISTUTILS_USE_SDK INCLUDE LIB"
-
-install:
-  - |
-    %PYTHON%\python.exe -m pip install -U pip
-    %PYTHON%\python.exe -m pip install wheel tox==3.9.0 virtualenv
-
-# note:
-# %PYTHON% has: python.exe
-# %PYTHON%\Scripts has: pip.exe, tox.exe (and others installed by bare pip)
-
-# We have a custom "build" system.  We don't need MSBuild or whatever.
-build: off
-
-# Do not build feature branch with open pull requests.  This is documented but
-# it's not clear it does anything.
-skip_branch_with_pr: true
-
-# This, perhaps, is effective.
-branches:
-  # whitelist
-  only:
-    - 'master'
-
-skip_commits:
- files:
-   # The Windows builds are unaffected by news fragments.
-   - 'newsfragments/*'
-   # Also, all this build junk.
-   - '.circleci/*'
-   - '.lgtm.yml'
-   - '.travis.yml'
-
-# we run from C:\projects\tahoe-lafs
-
-test_script:
-  # Put your test command here.
-  # Note that you must use the environment variable %PYTHON% to refer to
-  # the interpreter you're using - Appveyor does not do anything special
-  # to put the Python version you want to use on PATH.
-  - |
-    %PYTHON%\Scripts\tox.exe -e coverage
-    %PYTHON%\Scripts\tox.exe -e pyinstaller
-  # To verify that the resultant PyInstaller-generated binary executes
-  # cleanly (i.e., that it terminates with an exit code of 0 and isn't
-  # failing due to import/packaging-related errors, etc.).
-  - dist\Tahoe-LAFS\tahoe.exe --version
-
-after_test:
-  # This builds the main tahoe wheel, and wheels for all dependencies.
-  # Again, you only need build.cmd if you're building C extensions for
-  # 64-bit Python 3.3/3.4. And you need to use %PYTHON% to get the correct
-  # interpreter. If _trial_temp still exists, the "pip wheel" fails on
-  # _trial_temp\local_dir (not sure why).
-  - |
-    copy _trial_temp\test.log trial_test_log.txt
-    rd /s /q _trial_temp
-    %PYTHON%\python.exe setup.py bdist_wheel
-    %PYTHON%\python.exe -m pip wheel -w dist .
-  - |
-    %PYTHON%\python.exe -m pip install codecov "coverage ~= 4.5"
-    %PYTHON%\python.exe -m coverage xml -o coverage.xml -i
-    %PYTHON%\python.exe -m codecov -X search -X gcov -f coverage.xml
-
-artifacts:
-  # bdist_wheel puts your built wheel in the dist directory
-  # "pip wheel -w dist ." puts all the dependency wheels there too
-  # this gives us a zipfile with everything
-  - path: 'dist\*'
-  - path: trial_test_log.txt
-    name: Trial test.log
-  - path: eliot.log
-    name: Eliot test log
-
-on_failure:
-  # Artifacts are not normally uploaded when the job fails.  To get the test
-  # logs, we have to push them ourselves.
-  - ps: Push-AppveyorArtifact _trial_temp\test.log -Filename trial.log
-  - ps: Push-AppveyorArtifact eliot.log -Filename eliot.log
-
-#on_success:
-#  You can use this step to upload your artifacts to a public website.
-#  See Appveyor's documentation for more details. Or you can simply
-#  access your wheels from the Appveyor "artifacts" tab for your build.

.circleci/config.yml

@@ -211,7 +211,8 @@ jobs:
 
     environment:
       <<: *UTF_8_ENVIRONMENT
-      TAHOE_LAFS_TOX_ENVIRONMENT: "pypy27-coverage"
+      # We don't do coverage since it makes PyPy far too slow:
+      TAHOE_LAFS_TOX_ENVIRONMENT: "pypy27"
 
 
   c-locale:
@@ -285,7 +286,7 @@ jobs:
       # this reporter on Python 3.  So drop that and just specify the
       # reporter.
       TAHOE_LAFS_TRIAL_ARGS: "--reporter=subunitv2-file"
-      TAHOE_LAFS_TOX_ENVIRONMENT: "py36"
+      TAHOE_LAFS_TOX_ENVIRONMENT: "py36-coverage"
 
 
   ubuntu-20.04:
@@ -508,6 +509,7 @@ jobs:
     environment:
       DISTRO: "ubuntu"
       TAG: "20.04"
+      PYTHON_VERSION: "2.7"
 
 
   build-image-centos-8:

.circleci/run-tests.sh

@@ -68,6 +68,10 @@ export SUBUNITREPORTER_OUTPUT_PATH="${SUBUNIT2}"
 export TAHOE_LAFS_TRIAL_ARGS="${TAHOE_LAFS_TRIAL_ARGS:---reporter=subunitv2-file --rterrors}"
 export PIP_NO_INDEX="1"
 
+# Make output unbuffered, so progress reports from subunitv2-file get streamed
+# and notify CircleCI we're still alive.
+export PYTHONUNBUFFERED=1
+
 if [ "${ALLOWED_FAILURE}" = "yes" ]; then
     alternative="true"
 else

.github/workflows/ci.yml

@@ -49,8 +49,8 @@ jobs:
       - name: Display tool versions
         run: python misc/build_helpers/show-tool-versions.py
 
-      - name: Run "tox -e coverage"
+      - name: Run "tox -e py27-coverage"
-        run: tox -e coverage
+        run: tox -e py27-coverage
 
       - name: Upload eliot.log in case of failure
         uses: actions/upload-artifact@v1

.gitignore

@@ -1,4 +1,4 @@
-venv
+venv*
 
 # vim swap files
 *.swp
@@ -9,6 +9,7 @@ venv
 *~
 *.DS_Store
 .*.kate-swp
+*.bak
 
 /build/
 /support/

docs/how_to_make_a_tahoe-lafs_release.org

@@ -36,7 +36,7 @@ people are Release Maintainers:
   - [ ] documentation is ready (see above)
   - [ ] (Release Maintainer): git tag -s -u 0xE34E62D06D0E69CFCA4179FFBDE0D31D68666A7A -m "release Tahoe-LAFS-X.Y.Z" tahoe-lafs-X.Y.Z
   - [ ] build code locally:
-     tox -e py27,codechecks,coverage,deprecations,docs,integration,upcoming-deprecations
+     tox -e py27,codechecks,deprecations,docs,integration,upcoming-deprecations
   - [ ] created tarballs (they'll be in dist/ for later comparison)
      tox -e tarballs
   - [ ] release version is reporting itself as intended version

newsfragments/3355.other

@@ -0,0 +1 @@
+The "coverage" tox environment has been replaced by the "py27-coverage" and "py36-coverage" environments.

setup.py

@@ -116,6 +116,11 @@ install_requires = [
     # know works on Python 2.7.
     "eliot ~= 1.7",
 
+    # Pyrsistent 0.17.0 (which we use by way of Eliot) has dropped
+    # Python 2 entirely; stick to the version known to work for us.
+    # XXX: drop this bound: https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3404
+    "pyrsistent < 0.17.0",
+
     # A great way to define types of values.
     # XXX: drop the upper bound: https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3390
     "attrs >= 18.2.0, < 20",

src/allmydata/client.py

@@ -2,7 +2,10 @@ import os, stat, time, weakref
 from base64 import urlsafe_b64encode
 from functools import partial
 from errno import ENOENT, EPERM
-from ConfigParser import NoSectionError
+try:
+    from ConfigParser import NoSectionError
+except ImportError:
+    from configparser import NoSectionError
 
 from foolscap.furl import (
     decode_furl,

src/allmydata/codec.py

@@ -1,4 +1,16 @@
-# -*- test-case-name: allmydata.test.test_encode_share -*-
+"""
+CRS encoding and decoding.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 from zope.interface import implementer
 from twisted.internet import defer
@@ -9,7 +21,7 @@ import zfec
 
 @implementer(ICodecEncoder)
 class CRSEncoder(object):
-    ENCODER_TYPE = "crs"
+    ENCODER_TYPE = b"crs"
 
     def set_params(self, data_size, required_shares, max_shares):
         assert required_shares <= max_shares
@@ -27,8 +39,8 @@ class CRSEncoder(object):
         return (self.data_size, self.required_shares, self.max_shares)
 
     def get_serialized_params(self):
-        return "%d-%d-%d" % (self.data_size, self.required_shares,
+        return b"%d-%d-%d" % (self.data_size, self.required_shares,
-                             self.max_shares)
+                              self.max_shares)
 
     def get_block_size(self):
         return self.share_size
@@ -37,7 +49,7 @@ class CRSEncoder(object):
         precondition(desired_share_ids is None or len(desired_share_ids) <= self.max_shares, desired_share_ids, self.max_shares)
 
         if desired_share_ids is None:
-            desired_share_ids = range(self.max_shares)
+            desired_share_ids = list(range(self.max_shares))
 
         for inshare in inshares:
             assert len(inshare) == self.share_size, (len(inshare), self.share_size, self.data_size, self.required_shares)
@@ -71,5 +83,5 @@ class CRSDecoder(object):
         return defer.succeed(data)
 
 def parse_params(serializedparams):
-    pieces = serializedparams.split("-")
+    pieces = serializedparams.split(b"-")
     return int(pieces[0]), int(pieces[1]), int(pieces[2])

src/allmydata/dirnode.py

@@ -1,4 +1,6 @@
 """Directory Node implementation."""
+from past.builtins import unicode
+
 import time
 
 from zope.interface import implementer
@@ -227,7 +229,7 @@ def pack_children(childrenx, writekey, deep_immutable=False):
     return _pack_normalized_children(children, writekey=writekey, deep_immutable=deep_immutable)
 
 
-ZERO_LEN_NETSTR=netstring('')
+ZERO_LEN_NETSTR=netstring(b'')
 def _pack_normalized_children(children, writekey, deep_immutable=False):
     """Take a dict that maps:
          children[unicode_nfc_name] = (IFileSystemNode, metadata_dict)

src/allmydata/immutable/downloader/fetcher.py

@@ -4,7 +4,7 @@ from foolscap.api import eventually
 from allmydata.interfaces import NotEnoughSharesError, NoSharesError
 from allmydata.util import log
 from allmydata.util.dictutil import DictOfSets
-from common import OVERDUE, COMPLETE, CORRUPT, DEAD, BADSEGNUM, \
+from .common import OVERDUE, COMPLETE, CORRUPT, DEAD, BADSEGNUM, \
      BadSegmentNumberError
 
 class SegmentFetcher(object):

src/allmydata/immutable/downloader/finder.py

@@ -5,7 +5,7 @@ from foolscap.api import eventually
 from allmydata.util import base32, log
 from twisted.internet import reactor
 
-from share import Share, CommonShare
+from .share import Share, CommonShare
 
 def incidentally(res, f, *args, **kwargs):
     """Add me to a Deferred chain like this:

src/allmydata/immutable/downloader/node.py

@@ -13,10 +13,10 @@ from allmydata.hashtree import IncompleteHashTree, BadHashError, \
      NotEnoughHashesError
 
 # local imports
-from finder import ShareFinder
+from .finder import ShareFinder
-from fetcher import SegmentFetcher
+from .fetcher import SegmentFetcher
-from segmentation import Segmentation
+from .segmentation import Segmentation
-from common import BadCiphertextHashError
+from .common import BadCiphertextHashError
 
 class IDownloadStatusHandlingConsumer(Interface):
     def set_download_status_read_event(read_ev):

src/allmydata/immutable/downloader/segmentation.py

@@ -9,7 +9,7 @@ from allmydata.util import log
 from allmydata.util.spans import overlap
 from allmydata.interfaces import DownloadStopped
 
-from common import BadSegmentNumberError, WrongSegmentError
+from .common import BadSegmentNumberError, WrongSegmentError
 
 @implementer(IPushProducer)
 class Segmentation(object):

src/allmydata/immutable/downloader/share.py

@@ -13,7 +13,7 @@ from allmydata.hashtree import IncompleteHashTree, BadHashError, \
 
 from allmydata.immutable.layout import make_write_bucket_proxy
 from allmydata.util.observer import EventStreamObserver
-from common import COMPLETE, CORRUPT, DEAD, BADSEGNUM
+from .common import COMPLETE, CORRUPT, DEAD, BADSEGNUM
 
 
 class LayoutInvalid(Exception):

src/allmydata/immutable/layout.py

@@ -171,7 +171,7 @@ class WriteBucketProxy(object):
     def put_block(self, segmentnum, data):
         offset = self._offsets['data'] + segmentnum * self._block_size
         assert offset + len(data) <= self._offsets['uri_extension']
-        assert isinstance(data, str)
+        assert isinstance(data, bytes)
         if segmentnum < self._num_segments-1:
             precondition(len(data) == self._block_size,
                          len(data), self._block_size)
@@ -185,7 +185,7 @@ class WriteBucketProxy(object):
     def put_crypttext_hashes(self, hashes):
         offset = self._offsets['crypttext_hash_tree']
         assert isinstance(hashes, list)
-        data = "".join(hashes)
+        data = b"".join(hashes)
         precondition(len(data) == self._segment_hash_size,
                      len(data), self._segment_hash_size)
         precondition(offset + len(data) <= self._offsets['block_hashes'],
@@ -196,7 +196,7 @@ class WriteBucketProxy(object):
     def put_block_hashes(self, blockhashes):
         offset = self._offsets['block_hashes']
         assert isinstance(blockhashes, list)
-        data = "".join(blockhashes)
+        data = b"".join(blockhashes)
         precondition(len(data) == self._segment_hash_size,
                      len(data), self._segment_hash_size)
         precondition(offset + len(data) <= self._offsets['share_hashes'],
@@ -209,7 +209,7 @@ class WriteBucketProxy(object):
         # as 2+32=34 bytes each
         offset = self._offsets['share_hashes']
         assert isinstance(sharehashes, list)
-        data = "".join([struct.pack(">H", hashnum) + hashvalue
+        data = b"".join([struct.pack(">H", hashnum) + hashvalue
                         for hashnum,hashvalue in sharehashes])
         precondition(len(data) == self._share_hashtree_size,
                      len(data), self._share_hashtree_size)
@@ -220,7 +220,7 @@ class WriteBucketProxy(object):
 
     def put_uri_extension(self, data):
         offset = self._offsets['uri_extension']
-        assert isinstance(data, str)
+        assert isinstance(data, bytes)
         precondition(len(data) <= self._uri_extension_size_max,
                      len(data), self._uri_extension_size_max)
         length = struct.pack(self.fieldstruct, len(data))

src/allmydata/immutable/upload.py

@@ -1,3 +1,5 @@
+from past.builtins import long
+
 import os, time, weakref, itertools
 from zope.interface import implementer
 from twisted.python import failure
@@ -26,7 +28,7 @@ from allmydata.interfaces import IUploadable, IUploader, IUploadResults, \
 from allmydata.immutable import layout
 
 from six.moves import cStringIO as StringIO
-from happiness_upload import share_placement, calculate_happiness
+from .happiness_upload import share_placement, calculate_happiness
 
 from ..util.eliotutil import (
     log_call_deferred,

src/allmydata/interfaces.py

@@ -1,3 +1,18 @@
+"""
+Interfaces for Tahoe-LAFS.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    # Don't import object/str/dict/etc. types, so we don't break any
+    # interfaces. Not importing open() because it triggers bogus flake8 error.
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, pow, round, super, range, max, min  # noqa: F401
 
 from past.builtins import long
 
@@ -59,7 +74,7 @@ class RIBucketReader(RemoteInterface):
     def read(offset=Offset, length=ReadSize):
         return ShareData
 
-    def advise_corrupt_share(reason=str):
+    def advise_corrupt_share(reason=bytes):
         """Clients who discover hash failures in shares that they have
         downloaded from me will use this method to inform me about the
         failures. I will record their concern so that my operator can
@@ -72,7 +87,7 @@ class RIBucketReader(RemoteInterface):
         """
 
 
-TestVector = ListOf(TupleOf(Offset, ReadSize, str, str))
+TestVector = ListOf(TupleOf(Offset, ReadSize, bytes, bytes))
 # elements are (offset, length, operator, specimen)
 # operator is one of "lt, le, eq, ne, ge, gt"
 # nop always passes and is used to fetch data while writing.
@@ -90,13 +105,13 @@ ReadData = ListOf(ShareData)
 
 
 class RIStorageServer(RemoteInterface):
-    __remote_name__ = "RIStorageServer.tahoe.allmydata.com"
+    __remote_name__ = b"RIStorageServer.tahoe.allmydata.com"
 
     def get_version():
         """
         Return a dictionary of version information.
         """
-        return DictOf(str, Any())
+        return DictOf(bytes, Any())
 
     def allocate_buckets(storage_index=StorageIndex,
                          renew_secret=LeaseRenewSecret,
@@ -278,8 +293,8 @@ class RIStorageServer(RemoteInterface):
         """
         return TupleOf(bool, DictOf(int, ReadData))
 
-    def advise_corrupt_share(share_type=str, storage_index=StorageIndex,
+    def advise_corrupt_share(share_type=bytes, storage_index=StorageIndex,
-                             shnum=int, reason=str):
+                             shnum=int, reason=bytes):
         """Clients who discover hash failures in shares that they have
         downloaded from me will use this method to inform me about the
         failures. I will record their concern so that my operator can
@@ -2860,7 +2875,7 @@ UploadResults = Any() #DictOf(str, str)
 
 
 class RIEncryptedUploadable(RemoteInterface):
-    __remote_name__ = "RIEncryptedUploadable.tahoe.allmydata.com"
+    __remote_name__ = b"RIEncryptedUploadable.tahoe.allmydata.com"
 
     def get_size():
         return Offset
@@ -2876,7 +2891,7 @@ class RIEncryptedUploadable(RemoteInterface):
 
 
 class RICHKUploadHelper(RemoteInterface):
-    __remote_name__ = "RIUploadHelper.tahoe.allmydata.com"
+    __remote_name__ = b"RIUploadHelper.tahoe.allmydata.com"
 
     def get_version():
         """
@@ -2889,7 +2904,7 @@ class RICHKUploadHelper(RemoteInterface):
 
 
 class RIHelper(RemoteInterface):
-    __remote_name__ = "RIHelper.tahoe.allmydata.com"
+    __remote_name__ = b"RIHelper.tahoe.allmydata.com"
 
     def get_version():
         """
@@ -2916,7 +2931,7 @@ class RIHelper(RemoteInterface):
 
 
 class RIStatsProvider(RemoteInterface):
-    __remote_name__ = "RIStatsProvider.tahoe.allmydata.com"
+    __remote_name__ = b"RIStatsProvider.tahoe.allmydata.com"
     """
     Provides access to statistics and monitoring information.
     """
@@ -2933,7 +2948,7 @@ class RIStatsProvider(RemoteInterface):
 
 
 class RIStatsGatherer(RemoteInterface):
-    __remote_name__ = "RIStatsGatherer.tahoe.allmydata.com"
+    __remote_name__ = b"RIStatsGatherer.tahoe.allmydata.com"
     """
     Provides a monitoring service for centralised collection of stats
     """

src/allmydata/monitor.py

@@ -1,7 +1,21 @@
+"""
+Manage status of long-running operations.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 from zope.interface import Interface, implementer
 from allmydata.util import observer
 
+
 class IMonitor(Interface):
     """I manage status, progress, and cancellation for long-running operations.
 

src/allmydata/mutable/layout.py

@@ -1,3 +1,4 @@
+from past.utils import old_div
 
 import struct
 from allmydata.mutable.common import NeedMoreDataError, UnknownVersionError, \
@@ -180,11 +181,11 @@ def pack_offsets(verification_key_length, signature_length,
 def pack_share(prefix, verification_key, signature,
                share_hash_chain, block_hash_tree,
                share_data, encprivkey):
-    share_hash_chain_s = "".join([struct.pack(">H32s", i, share_hash_chain[i])
+    share_hash_chain_s = b"".join([struct.pack(">H32s", i, share_hash_chain[i])
-                                  for i in sorted(share_hash_chain.keys())])
+                                   for i in sorted(share_hash_chain.keys())])
     for h in block_hash_tree:
         assert len(h) == 32
-    block_hash_tree_s = "".join(block_hash_tree)
+    block_hash_tree_s = b"".join(block_hash_tree)
 
     offsets = pack_offsets(len(verification_key),
                            len(signature),
@@ -192,14 +193,14 @@ def pack_share(prefix, verification_key, signature,
                            len(block_hash_tree_s),
                            len(share_data),
                            len(encprivkey))
-    final_share = "".join([prefix,
+    final_share = b"".join([prefix,
-                           offsets,
+                            offsets,
-                           verification_key,
+                            verification_key,
-                           signature,
+                            signature,
-                           share_hash_chain_s,
+                            share_hash_chain_s,
-                           block_hash_tree_s,
+                            block_hash_tree_s,
-                           share_data,
+                            share_data,
-                           encprivkey])
+                            encprivkey])
     return final_share
 
 def pack_prefix(seqnum, root_hash, IV,
@@ -255,7 +256,7 @@ class SDMFSlotWriteProxy(object):
                                                        self._required_shares)
         assert expected_segment_size == segment_size
 
-        self._block_size = self._segment_size / self._required_shares
+        self._block_size = old_div(self._segment_size, self._required_shares)
 
         # This is meant to mimic how SDMF files were built before MDMF
         # entered the picture: we generate each share in its entirety,
@@ -296,7 +297,7 @@ class SDMFSlotWriteProxy(object):
                                       salt)
         else:
             checkstring = checkstring_or_seqnum
-        self._testvs = [(0, len(checkstring), "eq", checkstring)]
+        self._testvs = [(0, len(checkstring), b"eq", checkstring)]
 
 
     def get_checkstring(self):
@@ -306,7 +307,7 @@ class SDMFSlotWriteProxy(object):
         """
         if self._testvs:
             return self._testvs[0][3]
-        return ""
+        return b""
 
 
     def put_block(self, data, segnum, salt):
@@ -343,7 +344,7 @@ class SDMFSlotWriteProxy(object):
             assert len(h) == HASH_SIZE
 
         # serialize the blockhashes, then set them.
-        blockhashes_s = "".join(blockhashes)
+        blockhashes_s = b"".join(blockhashes)
         self._share_pieces['block_hash_tree'] = blockhashes_s
 
         return defer.succeed(None)
@@ -354,12 +355,12 @@ class SDMFSlotWriteProxy(object):
         Add the share hash chain to the share.
         """
         assert isinstance(sharehashes, dict)
-        for h in sharehashes.itervalues():
+        for h in sharehashes.values():
             assert len(h) == HASH_SIZE
 
         # serialize the sharehashes, then set them.
-        sharehashes_s = "".join([struct.pack(">H32s", i, sharehashes[i])
+        sharehashes_s = b"".join([struct.pack(">H32s", i, sharehashes[i])
-                                 for i in sorted(sharehashes.keys())])
+                                  for i in sorted(sharehashes.keys())])
         self._share_pieces['share_hash_chain'] = sharehashes_s
 
         return defer.succeed(None)
@@ -383,7 +384,7 @@ class SDMFSlotWriteProxy(object):
         assert len(salt) == SALT_SIZE
 
         self._share_pieces['salt'] = salt
-        self._share_pieces['sharedata'] = ""
+        self._share_pieces['sharedata'] = b""
 
 
     def get_signable(self):
@@ -519,14 +520,14 @@ class SDMFSlotWriteProxy(object):
         # to the remote server in one write.
         offsets = self._pack_offsets()
         prefix = self.get_signable()
-        final_share = "".join([prefix,
+        final_share = b"".join([prefix,
-                               offsets,
+                                offsets,
-                               self._share_pieces['verification_key'],
+                                self._share_pieces['verification_key'],
-                               self._share_pieces['signature'],
+                                self._share_pieces['signature'],
-                               self._share_pieces['share_hash_chain'],
+                                self._share_pieces['share_hash_chain'],
-                               self._share_pieces['block_hash_tree'],
+                                self._share_pieces['block_hash_tree'],
-                               self._share_pieces['sharedata'],
+                                self._share_pieces['sharedata'],
-                               self._share_pieces['encprivkey']])
+                                self._share_pieces['encprivkey']])
 
         # Our only data vector is going to be writing the final share,
         # in its entirely.
@@ -537,7 +538,7 @@ class SDMFSlotWriteProxy(object):
             # yet, so we assume that we are writing a new share, and set
             # a test vector that will allow a new share to be written.
             self._testvs = []
-            self._testvs.append(tuple([0, 1, "eq", ""]))
+            self._testvs.append(tuple([0, 1, b"eq", b""]))
 
         tw_vectors = {}
         tw_vectors[self.shnum] = (self._testvs, datavs, None)
@@ -788,7 +789,7 @@ class MDMFSlotWriteProxy(object):
         # and also because it provides a useful amount of bounds checking.
         self._num_segments = mathutil.div_ceil(self._data_length,
                                                self._segment_size)
-        self._block_size = self._segment_size / self._required_shares
+        self._block_size = old_div(self._segment_size, self._required_shares)
         # We also calculate the share size, to help us with block
         # constraints later.
         tail_size = self._data_length % self._segment_size
@@ -797,7 +798,7 @@ class MDMFSlotWriteProxy(object):
         else:
             self._tail_block_size = mathutil.next_multiple(tail_size,
                                                            self._required_shares)
-            self._tail_block_size /= self._required_shares
+            self._tail_block_size = old_div(self._tail_block_size, self._required_shares)
 
         # We already know where the sharedata starts; right after the end
         # of the header (which is defined as the signable part + the offsets)
@@ -868,7 +869,7 @@ class MDMFSlotWriteProxy(object):
         else:
             checkstring = seqnum_or_checkstring
 
-        if checkstring == "":
+        if checkstring == b"":
             # We special-case this, since len("") = 0, but we need
             # length of 1 for the case of an empty share to work on the
             # storage server, which is what a checkstring that is the
@@ -876,7 +877,7 @@ class MDMFSlotWriteProxy(object):
             self._testvs = []
         else:
             self._testvs = []
-            self._testvs.append((0, len(checkstring), "eq", checkstring))
+            self._testvs.append((0, len(checkstring), b"eq", checkstring))
 
 
     def __repr__(self):
@@ -893,7 +894,7 @@ class MDMFSlotWriteProxy(object):
         if self._root_hash:
             roothash = self._root_hash
         else:
-            roothash = "\x00" * 32
+            roothash = b"\x00" * 32
         return struct.pack(MDMFCHECKSTRING,
                            1,
                            self._seqnum,
@@ -964,7 +965,7 @@ class MDMFSlotWriteProxy(object):
 
         assert isinstance(blockhashes, list)
 
-        blockhashes_s = "".join(blockhashes)
+        blockhashes_s = b"".join(blockhashes)
         self._offsets['EOF'] = self._offsets['block_hash_tree'] + len(blockhashes_s)
 
         self._writevs.append(tuple([self._offsets['block_hash_tree'],
@@ -998,7 +999,7 @@ class MDMFSlotWriteProxy(object):
         if "verification_key" in self._offsets:
             raise LayoutInvalid("You must write the share hash chain "
                                 "before you write the signature")
-        sharehashes_s = "".join([struct.pack(">H32s", i, sharehashes[i])
+        sharehashes_s = b"".join([struct.pack(">H32s", i, sharehashes[i])
                                   for i in sorted(sharehashes.keys())])
         self._offsets['signature'] = self._offsets['share_hash_chain'] + \
             len(sharehashes_s)
@@ -1149,7 +1150,7 @@ class MDMFSlotWriteProxy(object):
         tw_vectors = {}
         if not self._testvs:
             self._testvs = []
-            self._testvs.append(tuple([0, 1, "eq", ""]))
+            self._testvs.append(tuple([0, 1, b"eq", b""]))
         if not self._written:
             # Write a new checkstring to the share when we write it, so
             # that we have something to check later.
@@ -1157,7 +1158,7 @@ class MDMFSlotWriteProxy(object):
             datavs.append((0, new_checkstring))
             def _first_write():
                 self._written = True
-                self._testvs = [(0, len(new_checkstring), "eq", new_checkstring)]
+                self._testvs = [(0, len(new_checkstring), b"eq", new_checkstring)]
             on_success = _first_write
         tw_vectors[self.shnum] = (self._testvs, datavs, None)
         d = self._storage_server.slot_testv_and_readv_and_writev(
@@ -1194,7 +1195,7 @@ class MDMFSlotReadProxy(object):
                  storage_server,
                  storage_index,
                  shnum,
-                 data="",
+                 data=b"",
                  data_is_everything=False):
         # Start the initialization process.
         self._storage_server = storage_server
@@ -1238,7 +1239,7 @@ class MDMFSlotReadProxy(object):
         # None if there isn't any cached data, but the way we index the
         # cached data requires a string, so convert None to "".
         if self._data == None:
-            self._data = ""
+            self._data = b""
 
 
     def _maybe_fetch_offsets_and_header(self, force_remote=False):
@@ -1317,7 +1318,7 @@ class MDMFSlotReadProxy(object):
         self._segment_size = segsize
         self._data_length = datalen
 
-        self._block_size = self._segment_size / self._required_shares
+        self._block_size = old_div(self._segment_size, self._required_shares)
         # We can upload empty files, and need to account for this fact
         # so as to avoid zero-division and zero-modulo errors.
         if datalen > 0:
@@ -1329,7 +1330,7 @@ class MDMFSlotReadProxy(object):
         else:
             self._tail_block_size = mathutil.next_multiple(tail_size,
                                                     self._required_shares)
-            self._tail_block_size /= self._required_shares
+            self._tail_block_size = old_div(self._tail_block_size, self._required_shares)
 
         return encoding_parameters
 
@@ -1416,7 +1417,7 @@ class MDMFSlotReadProxy(object):
                 # when we fetched the header
                 data = results[self.shnum]
                 if not data:
-                    data = ""
+                    data = b""
                 else:
                     if len(data) != 1:
                         raise BadShareError("got %d vectors, not 1" % len(data))
@@ -1425,7 +1426,7 @@ class MDMFSlotReadProxy(object):
             else:
                 data = results[self.shnum]
                 if not data:
-                    salt = data = ""
+                    salt = data = b""
                 else:
                     salt_and_data = results[self.shnum][0]
                     salt = salt_and_data[:SALT_SIZE]
@@ -1743,7 +1744,7 @@ class MDMFSlotReadProxy(object):
 
 
     def _read(self, readvs, force_remote=False):
-        unsatisfiable = filter(lambda x: x[0] + x[1] > len(self._data), readvs)
+        unsatisfiable = list(filter(lambda x: x[0] + x[1] > len(self._data), readvs))
         # TODO: It's entirely possible to tweak this so that it just
         # fulfills the requests that it can, and not demand that all
         # requests are satisfiable before running it.

src/allmydata/node.py

@@ -2,12 +2,17 @@
 This module contains classes and functions to implement and manage
 a node for Tahoe-LAFS.
 """
+from past.builtins import unicode
+
 import datetime
 import os.path
 import re
 import types
 import errno
-import ConfigParser
+try:
+    import ConfigParser
+except ImportError:
+    import configparser as ConfigParser
 import tempfile
 from io import BytesIO
 from base64 import b32decode, b32encode
@@ -67,7 +72,7 @@ def _common_valid_config():
 
 # Add our application versions to the data that Foolscap's LogPublisher
 # reports.
-for thing, things_version in get_package_versions().iteritems():
+for thing, things_version in get_package_versions().items():
     app_versions.add_version(thing, str(things_version))
 
 # group 1 will be addr (dotted quad string), group 3 if any will be portnum (string)
@@ -272,7 +277,10 @@ class _Config(object):
         self.config = configparser
 
         nickname_utf8 = self.get_config("node", "nickname", "<unspecified>")
-        self.nickname = nickname_utf8.decode("utf-8")
+        if isinstance(nickname_utf8, bytes):  # Python 2
+            self.nickname = nickname_utf8.decode("utf-8")
+        else:
+            self.nickname = nickname_utf8
         assert type(self.nickname) is unicode
 
     def validate(self, valid_config_sections):

src/allmydata/storage/expirer.py

@@ -1,3 +1,13 @@
+from __future__ import division
+from __future__ import absolute_import
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    # We omit anything that might end up in pickle, just in case.
+    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, range, str, max, min  # noqa: F401
+
 import time, os, pickle, struct
 from allmydata.storage.crawler import ShareCrawler
 from allmydata.storage.shares import get_share_file

src/allmydata/storage/immutable.py

@@ -1,3 +1,5 @@
+from future.utils import bytes_to_native_str
+
 import os, stat, struct, time
 
 from foolscap.api import Referenceable
@@ -85,7 +87,7 @@ class ShareFile(object):
         seekpos = self._data_offset+offset
         actuallength = max(0, min(length, self._lease_offset-seekpos))
         if actuallength == 0:
-            return ""
+            return b""
         with open(self.home, 'rb') as f:
             f.seek(seekpos)
             return f.read(actuallength)
@@ -298,7 +300,9 @@ class BucketReader(Referenceable):
 
     def __repr__(self):
         return "<%s %s %s>" % (self.__class__.__name__,
-                               base32.b2a(self.storage_index[:8])[:12],
+                               bytes_to_native_str(
+                                   base32.b2a(self.storage_index[:8])[:12]
+                               ),
                                self.shnum)
 
     def remote_read(self, offset, length):
@@ -309,7 +313,7 @@ class BucketReader(Referenceable):
         return data
 
     def remote_advise_corrupt_share(self, reason):
-        return self.ss.remote_advise_corrupt_share("immutable",
+        return self.ss.remote_advise_corrupt_share(b"immutable",
                                                    self.storage_index,
                                                    self.shnum,
                                                    reason)

src/allmydata/storage/mutable.py

@@ -48,8 +48,9 @@ class MutableShareFile(object):
     # our sharefiles share with a recognizable string, plus some random
     # binary data to reduce the chance that a regular text file will look
     # like a sharefile.
-    MAGIC = "Tahoe mutable container v1\n" + "\x75\x09\x44\x03\x8e"
+    MAGIC = b"Tahoe mutable container v1\n" + b"\x75\x09\x44\x03\x8e"
     assert len(MAGIC) == 32
+    assert isinstance(MAGIC, bytes)
     MAX_SIZE = MAX_MUTABLE_SHARE_SIZE
     # TODO: decide upon a policy for max share size
 
@@ -86,7 +87,7 @@ class MutableShareFile(object):
                 self.MAGIC, my_nodeid, write_enabler,
                 data_length, extra_lease_offset,
             )
-            leases = ("\x00" * self.LEASE_SIZE) * 4
+            leases = (b"\x00" * self.LEASE_SIZE) * 4
             f.write(header + leases)
             # data goes here, empty after creation
             f.write(struct.pack(">L", num_extra_leases))
@@ -112,7 +113,7 @@ class MutableShareFile(object):
             # start beyond the end of the data return an empty string.
             length = max(0, data_length-offset)
         if length == 0:
-            return ""
+            return b""
         precondition(offset+length <= data_length)
         f.seek(self.DATA_OFFSET+offset)
         data = f.read(length)
@@ -154,7 +155,7 @@ class MutableShareFile(object):
         # Zero out the old lease info (in order to minimize the chance that
         # it could accidentally be exposed to a reader later, re #1528).
         f.seek(old_extra_lease_offset)
-        f.write('\x00' * leases_size)
+        f.write(b'\x00' * leases_size)
         f.flush()
 
         # An interrupt here will corrupt the leases.
@@ -193,7 +194,7 @@ class MutableShareFile(object):
             # Fill any newly exposed empty space with 0's.
             if offset > data_length:
                 f.seek(self.DATA_OFFSET+data_length)
-                f.write('\x00'*(offset - data_length))
+                f.write(b'\x00'*(offset - data_length))
                 f.flush()
 
             new_data_length = offset+length
@@ -325,10 +326,10 @@ class MutableShareFile(object):
         modified = 0
         remaining = 0
         blank_lease = LeaseInfo(owner_num=0,
-                                renew_secret="\x00"*32,
+                                renew_secret=b"\x00"*32,
-                                cancel_secret="\x00"*32,
+                                cancel_secret=b"\x00"*32,
                                 expiration_time=0,
-                                nodeid="\x00"*20)
+                                nodeid=b"\x00"*20)
         with open(self.home, 'rb+') as f:
             for (leasenum,lease) in self._enumerate_leases(f):
                 accepting_nodeids.add(lease.nodeid)
@@ -420,18 +421,18 @@ class MutableShareFile(object):
                     # self._change_container_size() here.
 
 def testv_compare(a, op, b):
-    assert op in ("lt", "le", "eq", "ne", "ge", "gt")
+    assert op in (b"lt", b"le", b"eq", b"ne", b"ge", b"gt")
-    if op == "lt":
+    if op == b"lt":
         return a < b
-    if op == "le":
+    if op == b"le":
         return a <= b
-    if op == "eq":
+    if op == b"eq":
         return a == b
-    if op == "ne":
+    if op == b"ne":
         return a != b
-    if op == "ge":
+    if op == b"ge":
         return a >= b
-    if op == "gt":
+    if op == b"gt":
         return a > b
     # never reached
 
@@ -440,7 +441,7 @@ class EmptyShare(object):
     def check_testv(self, testv):
         test_good = True
         for (offset, length, operator, specimen) in testv:
-            data = ""
+            data = b""
             if not testv_compare(data, operator, specimen):
                 test_good = False
                 break

src/allmydata/storage/server.py

@@ -1,3 +1,4 @@
+from future.utils import bytes_to_native_str
 import os, re, struct, time
 import weakref
 import six
@@ -51,6 +52,7 @@ class StorageServer(service.MultiService, Referenceable):
         service.MultiService.__init__(self)
         assert isinstance(nodeid, bytes)
         assert len(nodeid) == 20
+        assert isinstance(nodeid, bytes)
         self.my_nodeid = nodeid
         self.storedir = storedir
         sharedir = os.path.join(storedir, "shares")
@@ -398,7 +400,7 @@ class StorageServer(service.MultiService, Referenceable):
         # since all shares get the same lease data, we just grab the leases
         # from the first share
         try:
-            shnum, filename = self._get_bucket_shares(storage_index).next()
+            shnum, filename = next(self._get_bucket_shares(storage_index))
             sf = ShareFile(filename)
             return sf.get_leases()
         except StopIteration:
@@ -676,6 +678,10 @@ class StorageServer(service.MultiService, Referenceable):
 
     def remote_advise_corrupt_share(self, share_type, storage_index, shnum,
                                     reason):
+        # This is a remote API, I believe, so this has to be bytes for legacy
+        # protocol backwards compatibility reasons.
+        assert isinstance(share_type, bytes)
+        assert isinstance(reason, bytes)
         fileutil.make_dirs(self.corruption_advisory_dir)
         now = time_format.iso_utc(sep="T")
         si_s = si_b2a(storage_index)
@@ -684,11 +690,11 @@ class StorageServer(service.MultiService, Referenceable):
                           "%s--%s-%d" % (now, si_s, shnum)).replace(":","")
         with open(fn, "w") as f:
             f.write("report: Share Corruption\n")
-            f.write("type: %s\n" % share_type)
+            f.write("type: %s\n" % bytes_to_native_str(share_type))
-            f.write("storage_index: %s\n" % si_s)
+            f.write("storage_index: %s\n" % bytes_to_native_str(si_s))
             f.write("share_number: %d\n" % shnum)
             f.write("\n")
-            f.write(reason)
+            f.write(bytes_to_native_str(reason))
             f.write("\n")
         log.msg(format=("client claims corruption in (%(share_type)s) " +
                         "%(si)s-%(shnum)d: %(reason)s"),

src/allmydata/storage_client.py

@@ -30,9 +30,12 @@ the foolscap-based server implemented in src/allmydata/storage/*.py .
 
 
 import re, time, hashlib
-from ConfigParser import (
+try:
-    NoSectionError,
+    from ConfigParser import (
-)
+        NoSectionError,
+    )
+except ImportError:
+    from configparser import NoSectionError
 import attr
 from zope.interface import (
     Attribute,
@@ -534,11 +537,11 @@ class _NullStorage(object):
     which we can't communicate.
     """
     nickname = ""
-    permutation_seed = hashlib.sha256("").digest()
+    permutation_seed = hashlib.sha256(b"").digest()
-    tubid = hashlib.sha256("").digest()
+    tubid = hashlib.sha256(b"").digest()
     storage_server = None
 
-    lease_seed = hashlib.sha256("").digest()
+    lease_seed = hashlib.sha256(b"").digest()
 
     name = "<unsupported>"
     longname = "<storage with unsupported protocol>"

src/allmydata/test/cli/test_create.py

@@ -6,6 +6,8 @@ from twisted.python import usage
 from allmydata.util import configutil
 from ..common_util import run_cli, parse_cli
 from ...scripts import create_node
+from ... import client
+
 
 def read_config(basedir):
     tahoe_cfg = os.path.join(basedir, "tahoe.cfg")
@@ -33,6 +35,31 @@ class Config(unittest.TestCase):
             e = self.assertRaises(usage.UsageError, parse_cli, verb, *args)
             self.assertIn("option %s not recognized" % (option,), str(e))
 
+    def test_create_client_config(self):
+        d = self.mktemp()
+        os.mkdir(d)
+        fname = os.path.join(d, 'tahoe.cfg')
+
+        with open(fname, 'w') as f:
+            opts = {"nickname": "nick",
+                    "webport": "tcp:3456",
+                    "hide-ip": False,
+                    "listen": "none",
+                    "shares-needed": "1",
+                    "shares-happy": "1",
+                    "shares-total": "1",
+                    }
+            create_node.write_node_config(f, opts)
+            create_node.write_client_config(f, opts)
+
+        config = configutil.get_config(fname)
+        # should succeed, no exceptions
+        configutil.validate_config(
+            fname,
+            config,
+            client._valid_config(),
+        )
+
     @defer.inlineCallbacks
     def test_client(self):
         basedir = self.mktemp()

src/allmydata/test/common.py

@@ -52,7 +52,6 @@ from twisted.internet.defer import inlineCallbacks, returnValue
 from twisted.internet.interfaces import IPullProducer
 from twisted.python import failure
 from twisted.python.filepath import FilePath
-from twisted.application import service
 from twisted.web.error import Error as WebError
 from twisted.internet.interfaces import (
     IStreamServerEndpointStringParser,
@@ -88,6 +87,8 @@ from ..crypto import (
 from .eliotutil import (
     EliotLoggedRunTest,
 )
+# Backwards compatibility imports:
+from .common_py3 import LoggingServiceParent, ShouldFailMixin  # noqa: F401
 
 
 TEST_RSA_KEY_SIZE = 522
@@ -780,53 +781,8 @@ def create_mutable_filenode(contents, mdmf=False, all_contents=None):
     return filenode
 
 
-class LoggingServiceParent(service.MultiService):
-    def log(self, *args, **kwargs):
-        return log.msg(*args, **kwargs)
-
-
 TEST_DATA="\x02"*(Uploader.URI_LIT_SIZE_THRESHOLD+1)
 
-class ShouldFailMixin(object):
-    def shouldFail(self, expected_failure, which, substring,
-                   callable, *args, **kwargs):
-        """Assert that a function call raises some exception. This is a
-        Deferred-friendly version of TestCase.assertRaises() .
-
-        Suppose you want to verify the following function:
-
-         def broken(a, b, c):
-             if a < 0:
-                 raise TypeError('a must not be negative')
-             return defer.succeed(b+c)
-
-        You can use:
-            d = self.shouldFail(TypeError, 'test name',
-                                'a must not be negative',
-                                broken, -4, 5, c=12)
-        in your test method. The 'test name' string will be included in the
-        error message, if any, because Deferred chains frequently make it
-        difficult to tell which assertion was tripped.
-
-        The substring= argument, if not None, must appear in the 'repr'
-        of the message wrapped by this Failure, or the test will fail.
-        """
-
-        assert substring is None or isinstance(substring, str)
-        d = defer.maybeDeferred(callable, *args, **kwargs)
-        def done(res):
-            if isinstance(res, failure.Failure):
-                res.trap(expected_failure)
-                if substring:
-                    message = repr(res.value.args[0])
-                    self.failUnless(substring in message,
-                                    "%s: substring '%s' not in '%s'"
-                                    % (which, substring, message))
-            else:
-                self.fail("%s was supposed to raise %s, not get '%s'" %
-                          (which, expected_failure, res))
-        d.addBoth(done)
-        return d
 
 class WebErrorMixin(object):
     def explain_web_error(self, f):

src/allmydata/test/common_py3.py

@@ -19,11 +19,13 @@ import time
 import signal
 
 from twisted.internet import defer, reactor
+from twisted.application import service
 from twisted.python import failure
 from twisted.trial import unittest
 
 from ..util.assertutil import precondition
 from ..util.encodingutil import unicode_platform, get_filesystem_encoding
+from ..util import log
 
 
 class TimezoneMixin(object):
@@ -77,6 +79,28 @@ class ShouldFailMixin(object):
 
     def shouldFail(self, expected_failure, which, substring,
                    callable, *args, **kwargs):
+        """Assert that a function call raises some exception. This is a
+        Deferred-friendly version of TestCase.assertRaises() .
+
+        Suppose you want to verify the following function:
+
+         def broken(a, b, c):
+             if a < 0:
+                 raise TypeError('a must not be negative')
+             return defer.succeed(b+c)
+
+        You can use:
+            d = self.shouldFail(TypeError, 'test name',
+                                'a must not be negative',
+                                broken, -4, 5, c=12)
+        in your test method. The 'test name' string will be included in the
+        error message, if any, because Deferred chains frequently make it
+        difficult to tell which assertion was tripped.
+
+        The substring= argument, if not None, must appear in the 'repr'
+        of the message wrapped by this Failure, or the test will fail.
+        """
+
         assert substring is None or isinstance(substring, (bytes, unicode))
         d = defer.maybeDeferred(callable, *args, **kwargs)
         def done(res):
@@ -135,3 +159,9 @@ class FakeCanary(object):
         if self.ignore:
             return
         del self.disconnectors[marker]
+
+
+class LoggingServiceParent(service.MultiService):
+    def log(self, *args, **kwargs):
+        return log.msg(*args, **kwargs)
+

src/allmydata/test/common_web.py

@@ -1,64 +1,7 @@
 
-import re
 import treq
 from twisted.internet import defer
 from twisted.web.error import Error
-from nevow.testutil import FakeRequest
-from nevow import inevow, context
-
-class WebRenderingMixin(object):
-    # d=page.renderString() or s=page.renderSynchronously() will exercise
-    # docFactory, render_*/data_* . It won't exercise want_json(), or my
-    # renderHTTP() override which tests want_json(). To exercise args=, we
-    # must build a context. Pages which use a return_to= argument need a
-    # context.
-
-    # d=page.renderHTTP(ctx) will exercise my renderHTTP, want_json, and
-    # docFactory/render_*/data_*, but it requires building a context. Since
-    # we're already building a context, it is easy to exercise args= .
-
-    # so, use at least two d=page.renderHTTP(ctx) per page (one for json, one
-    # for html), then use lots of simple s=page.renderSynchronously() to
-    # exercise the fine details (the ones that don't require args=).
-
-    def make_context(self, req):
-        ctx = context.RequestContext(tag=req)
-        ctx.remember(req, inevow.IRequest)
-        ctx.remember(None, inevow.IData)
-        ctx = context.WovenContext(parent=ctx, precompile=False)
-        return ctx
-
-    def render1(self, page, **kwargs):
-        # use this to exercise an overridden renderHTTP, usually for
-        # output=json or render_GET. It always returns a Deferred.
-        req = FakeRequest(**kwargs)
-        req.fields = None
-        ctx = self.make_context(req)
-        d = defer.maybeDeferred(page.renderHTTP, ctx)
-        def _done(res):
-            if isinstance(res, str):
-                return res + req.v
-            return req.v
-        d.addCallback(_done)
-        return d
-
-    def render2(self, page, **kwargs):
-        # use this to exercise the normal Nevow docFactory rendering. It
-        # returns a string. If one of the render_* methods returns a
-        # Deferred, this will throw an exception. (note that
-        # page.renderString is the Deferred-returning equivalent)
-        req = FakeRequest(**kwargs)
-        req.fields = None
-        ctx = self.make_context(req)
-        return page.renderSynchronously(ctx)
-
-    def failUnlessIn(self, substring, s):
-        self.failUnless(substring in s, s)
-
-    def remove_tags(self, s):
-        s = re.sub(r'<[^>]*>', ' ', s)
-        s = re.sub(r'\s+', ' ', s)
-        return s
 
 @defer.inlineCallbacks
 def do_http(method, url, **kwargs):

src/allmydata/test/eliotutil.py

@@ -2,6 +2,8 @@
 Tools aimed at the interaction between tests and Eliot.
 """
 
+from past.builtins import unicode
+
 __all__ = [
     "RUN_TEST",
     "EliotLoggedRunTest",

src/allmydata/test/test_codec.py

@@ -1,8 +1,21 @@
+"""
+Tests for allmydata.codec.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 import os
 from twisted.trial import unittest
 from twisted.python import log
-from allmydata.codec import CRSEncoder, CRSDecoder
+from allmydata.codec import CRSEncoder, CRSDecoder, parse_params
 import random
 from allmydata.util import mathutil
 
@@ -13,6 +26,8 @@ class T(unittest.TestCase):
         enc.set_params(size, required_shares, max_shares)
         params = enc.get_params()
         assert params == (size, required_shares, max_shares)
+        serialized_params = enc.get_serialized_params()
+        self.assertEqual(parse_params(serialized_params), params)
         log.msg("params: %s" % (params,))
         d = enc.encode(data0s)
         def _done_encoding_all(shares_and_shareids):
@@ -23,7 +38,7 @@ class T(unittest.TestCase):
         d.addCallback(_done_encoding_all)
         if fewer_shares is not None:
             # also validate that the desired_shareids= parameter works
-            desired_shareids = random.sample(range(max_shares), fewer_shares)
+            desired_shareids = random.sample(list(range(max_shares)), fewer_shares)
             d.addCallback(lambda res: enc.encode(data0s, desired_shareids))
             def _check_fewer_shares(some_shares_and_their_shareids):
                 (some_shares, their_shareids) = some_shares_and_their_shareids
@@ -38,11 +53,11 @@ class T(unittest.TestCase):
             return d1
 
         def _check_data(decoded_shares):
-            self.failUnlessEqual(len(''.join(decoded_shares)), len(''.join(data0s)))
+            self.failUnlessEqual(len(b''.join(decoded_shares)), len(b''.join(data0s)))
             self.failUnlessEqual(len(decoded_shares), len(data0s))
             for (i, (x, y)) in enumerate(zip(data0s, decoded_shares)):
                 self.failUnlessEqual(x, y, "%s: %r != %r....  first share was %r" % (str(i), x, y, data0s[0],))
-            self.failUnless(''.join(decoded_shares) == ''.join(data0s), "%s" % ("???",))
+            self.failUnless(b''.join(decoded_shares) == b''.join(data0s), "%s" % ("???",))
             # 0data0sclipped = tuple(data0s)
             # data0sclipped[-1] =
             # self.failUnless(tuple(decoded_shares) == tuple(data0s))
@@ -59,7 +74,7 @@ class T(unittest.TestCase):
         def _decode_some_random(res):
             log.msg("_decode_some_random")
             # use a randomly-selected minimal subset
-            l = random.sample(zip(self.shares, self.shareids), required_shares)
+            l = random.sample(list(zip(self.shares, self.shareids)), required_shares)
             some_shares = [ x[0] for x in l ]
             some_shareids = [ x[1] for x in l ]
             return _decode((some_shares, some_shareids))
@@ -70,10 +85,10 @@ class T(unittest.TestCase):
             log.msg("_decode_multiple")
             # make sure we can re-use the decoder object
             shares1 = random.sample(self.shares, required_shares)
-            sharesl1 = random.sample(zip(self.shares, self.shareids), required_shares)
+            sharesl1 = random.sample(list(zip(self.shares, self.shareids)), required_shares)
             shares1 = [ x[0] for x in sharesl1 ]
             shareids1 = [ x[1] for x in sharesl1 ]
-            sharesl2 = random.sample(zip(self.shares, self.shareids), required_shares)
+            sharesl2 = random.sample(list(zip(self.shares, self.shareids)), required_shares)
             shares2 = [ x[0] for x in sharesl2 ]
             shareids2 = [ x[1] for x in sharesl2 ]
             dec = CRSDecoder()

src/allmydata/test/test_configutil.py

@@ -1,14 +1,26 @@
+"""
+Tests for allmydata.util.configutil.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    # Omitted dict, cause worried about interactions.
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, list, object, range, str, max, min  # noqa: F401
+
 import os.path
 
 from twisted.trial import unittest
 
 from allmydata.util import configutil
-from allmydata.test.no_network import GridTestMixin
-from ..scripts import create_node
-from .. import client
 
 
-class ConfigUtilTests(GridTestMixin, unittest.TestCase):
+class ConfigUtilTests(unittest.TestCase):
     def setUp(self):
         super(ConfigUtilTests, self).setUp()
         self.static_valid_config = configutil.ValidConfiguration(
@@ -20,10 +32,22 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
             lambda section_name, item_name: (section_name, item_name) == ("node", "valid"),
         )
 
+    def create_tahoe_cfg(self, cfg):
+        d = self.mktemp()
+        os.mkdir(d)
+        fname = os.path.join(d, 'tahoe.cfg')
+        with open(fname, "w") as f:
+            f.write(cfg)
+        return fname
+
     def test_config_utils(self):
-        self.basedir = "cli/ConfigUtilTests/test-config-utils"
+        tahoe_cfg = self.create_tahoe_cfg("""\
-        self.set_up_grid(oneshare=True)
+[node]
-        tahoe_cfg = os.path.join(self.get_clientdir(i=0), "tahoe.cfg")
+nickname = client-0
+web.port = adopt-socket:fd=5
+[storage]
+enabled = false
+""")
 
         # test that at least one option was read correctly
         config = configutil.get_config(tahoe_cfg)
@@ -45,12 +69,7 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
         self.failUnlessEqual(config.get("node", "descriptor"), descriptor)
 
     def test_config_validation_success(self):
-        d = self.mktemp()
+        fname = self.create_tahoe_cfg('[node]\nvalid = foo\n')
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            f.write('[node]\nvalid = foo\n')
 
         config = configutil.get_config(fname)
         # should succeed, no exceptions
@@ -66,12 +85,7 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
         validation but are matched by the dynamic validation is considered
         valid.
         """
-        d = self.mktemp()
+        fname = self.create_tahoe_cfg('[node]\nvalid = foo\n')
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            f.write('[node]\nvalid = foo\n')
 
         config = configutil.get_config(fname)
         # should succeed, no exceptions
@@ -82,12 +96,7 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
         )
 
     def test_config_validation_invalid_item(self):
-        d = self.mktemp()
+        fname = self.create_tahoe_cfg('[node]\nvalid = foo\ninvalid = foo\n')
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            f.write('[node]\nvalid = foo\ninvalid = foo\n')
 
         config = configutil.get_config(fname)
         e = self.assertRaises(
@@ -103,12 +112,7 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
         A configuration with a section that is matched by neither the static nor
         dynamic validators is rejected.
         """
-        d = self.mktemp()
+        fname = self.create_tahoe_cfg('[node]\nvalid = foo\n[invalid]\n')
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            f.write('[node]\nvalid = foo\n[invalid]\n')
 
         config = configutil.get_config(fname)
         e = self.assertRaises(
@@ -124,12 +128,7 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
         A configuration with a section that is matched by neither the static nor
         dynamic validators is rejected.
         """
-        d = self.mktemp()
+        fname = self.create_tahoe_cfg('[node]\nvalid = foo\n[invalid]\n')
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            f.write('[node]\nvalid = foo\n[invalid]\n')
 
         config = configutil.get_config(fname)
         e = self.assertRaises(
@@ -145,12 +144,7 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
         A configuration with a section, item pair that is matched by neither the
         static nor dynamic validators is rejected.
         """
-        d = self.mktemp()
+        fname = self.create_tahoe_cfg('[node]\nvalid = foo\ninvalid = foo\n')
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            f.write('[node]\nvalid = foo\ninvalid = foo\n')
 
         config = configutil.get_config(fname)
         e = self.assertRaises(
@@ -160,28 +154,3 @@ class ConfigUtilTests(GridTestMixin, unittest.TestCase):
             self.dynamic_valid_config,
         )
         self.assertIn("section [node] contains unknown option 'invalid'", str(e))
-
-    def test_create_client_config(self):
-        d = self.mktemp()
-        os.mkdir(d)
-        fname = os.path.join(d, 'tahoe.cfg')
-
-        with open(fname, 'w') as f:
-            opts = {"nickname": "nick",
-                    "webport": "tcp:3456",
-                    "hide-ip": False,
-                    "listen": "none",
-                    "shares-needed": "1",
-                    "shares-happy": "1",
-                    "shares-total": "1",
-                    }
-            create_node.write_node_config(f, opts)
-            create_node.write_client_config(f, opts)
-
-        config = configutil.get_config(fname)
-        # should succeed, no exceptions
-        configutil.validate_config(
-            fname,
-            config,
-            client._valid_config(),
-        )

src/allmydata/test/test_connection_status.py

@@ -0,0 +1,122 @@
+"""
+Tests for allmydata.util.connection_status.
+
+Port to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
+
+import mock
+
+from twisted.trial import unittest
+
+from ..util import connection_status
+
+class Status(unittest.TestCase):
+    def test_hint_statuses(self):
+        ncs = connection_status._hint_statuses(["h2","h1"],
+                                               {"h1": "hand1", "h4": "hand4"},
+                                               {"h1": "st1", "h2": "st2",
+                                                "h3": "st3"})
+        self.assertEqual(ncs, {"h1 via hand1": "st1",
+                               "h2": "st2"})
+
+    def test_reconnector_connected(self):
+        ci = mock.Mock()
+        ci.connectorStatuses = {"h1": "st1"}
+        ci.connectionHandlers = {"h1": "hand1"}
+        ci.winningHint = "h1"
+        ci.establishedAt = 120
+        ri = mock.Mock()
+        ri.state = "connected"
+        ri.connectionInfo = ci
+        rc = mock.Mock
+        rc.getReconnectionInfo = mock.Mock(return_value=ri)
+        cs = connection_status.from_foolscap_reconnector(rc, 123)
+        self.assertEqual(cs.connected, True)
+        self.assertEqual(cs.summary, "Connected to h1 via hand1")
+        self.assertEqual(cs.non_connected_statuses, {})
+        self.assertEqual(cs.last_connection_time, 120)
+        self.assertEqual(cs.last_received_time, 123)
+
+    def test_reconnector_connected_others(self):
+        ci = mock.Mock()
+        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
+        ci.connectionHandlers = {"h1": "hand1"}
+        ci.winningHint = "h1"
+        ci.establishedAt = 120
+        ri = mock.Mock()
+        ri.state = "connected"
+        ri.connectionInfo = ci
+        rc = mock.Mock
+        rc.getReconnectionInfo = mock.Mock(return_value=ri)
+        cs = connection_status.from_foolscap_reconnector(rc, 123)
+        self.assertEqual(cs.connected, True)
+        self.assertEqual(cs.summary, "Connected to h1 via hand1")
+        self.assertEqual(cs.non_connected_statuses, {"h2": "st2"})
+        self.assertEqual(cs.last_connection_time, 120)
+        self.assertEqual(cs.last_received_time, 123)
+
+    def test_reconnector_connected_listener(self):
+        ci = mock.Mock()
+        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
+        ci.connectionHandlers = {"h1": "hand1"}
+        ci.listenerStatus = ("listener1", "successful")
+        ci.winningHint = None
+        ci.establishedAt = 120
+        ri = mock.Mock()
+        ri.state = "connected"
+        ri.connectionInfo = ci
+        rc = mock.Mock
+        rc.getReconnectionInfo = mock.Mock(return_value=ri)
+        cs = connection_status.from_foolscap_reconnector(rc, 123)
+        self.assertEqual(cs.connected, True)
+        self.assertEqual(cs.summary, "Connected via listener (listener1)")
+        self.assertEqual(cs.non_connected_statuses,
+                         {"h1 via hand1": "st1", "h2": "st2"})
+        self.assertEqual(cs.last_connection_time, 120)
+        self.assertEqual(cs.last_received_time, 123)
+
+    def test_reconnector_connecting(self):
+        ci = mock.Mock()
+        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
+        ci.connectionHandlers = {"h1": "hand1"}
+        ri = mock.Mock()
+        ri.state = "connecting"
+        ri.connectionInfo = ci
+        rc = mock.Mock
+        rc.getReconnectionInfo = mock.Mock(return_value=ri)
+        cs = connection_status.from_foolscap_reconnector(rc, 123)
+        self.assertEqual(cs.connected, False)
+        self.assertEqual(cs.summary, "Trying to connect")
+        self.assertEqual(cs.non_connected_statuses,
+                         {"h1 via hand1": "st1", "h2": "st2"})
+        self.assertEqual(cs.last_connection_time, None)
+        self.assertEqual(cs.last_received_time, 123)
+
+    def test_reconnector_waiting(self):
+        ci = mock.Mock()
+        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
+        ci.connectionHandlers = {"h1": "hand1"}
+        ri = mock.Mock()
+        ri.state = "waiting"
+        ri.lastAttempt = 10
+        ri.nextAttempt = 20
+        ri.connectionInfo = ci
+        rc = mock.Mock
+        rc.getReconnectionInfo = mock.Mock(return_value=ri)
+        with mock.patch("time.time", return_value=12):
+            cs = connection_status.from_foolscap_reconnector(rc, 5)
+        self.assertEqual(cs.connected, False)
+        self.assertEqual(cs.summary,
+                         "Reconnecting in 8 seconds (last attempt 2s ago)")
+        self.assertEqual(cs.non_connected_statuses,
+                         {"h1 via hand1": "st1", "h2": "st2"})
+        self.assertEqual(cs.last_connection_time, None)
+        self.assertEqual(cs.last_received_time, 5)

src/allmydata/test/test_connections.py

@@ -7,7 +7,6 @@ from foolscap.connections import tcp
 from ..node import PrivacyError, config_from_string
 from ..node import create_connection_handlers
 from ..node import create_main_tub, _tub_portlocation
-from ..util import connection_status
 from ..util.i2p_provider import create as create_i2p_provider
 from ..util.tor_provider import create as create_tor_provider
 
@@ -463,106 +462,3 @@ class Privacy(unittest.TestCase):
             str(ctx.exception),
             "tub.location includes tcp: hint",
         )
-
-class Status(unittest.TestCase):
-    def test_hint_statuses(self):
-        ncs = connection_status._hint_statuses(["h2","h1"],
-                                               {"h1": "hand1", "h4": "hand4"},
-                                               {"h1": "st1", "h2": "st2",
-                                                "h3": "st3"})
-        self.assertEqual(ncs, {"h1 via hand1": "st1",
-                               "h2": "st2"})
-
-    def test_reconnector_connected(self):
-        ci = mock.Mock()
-        ci.connectorStatuses = {"h1": "st1"}
-        ci.connectionHandlers = {"h1": "hand1"}
-        ci.winningHint = "h1"
-        ci.establishedAt = 120
-        ri = mock.Mock()
-        ri.state = "connected"
-        ri.connectionInfo = ci
-        rc = mock.Mock
-        rc.getReconnectionInfo = mock.Mock(return_value=ri)
-        cs = connection_status.from_foolscap_reconnector(rc, 123)
-        self.assertEqual(cs.connected, True)
-        self.assertEqual(cs.summary, "Connected to h1 via hand1")
-        self.assertEqual(cs.non_connected_statuses, {})
-        self.assertEqual(cs.last_connection_time, 120)
-        self.assertEqual(cs.last_received_time, 123)
-
-    def test_reconnector_connected_others(self):
-        ci = mock.Mock()
-        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
-        ci.connectionHandlers = {"h1": "hand1"}
-        ci.winningHint = "h1"
-        ci.establishedAt = 120
-        ri = mock.Mock()
-        ri.state = "connected"
-        ri.connectionInfo = ci
-        rc = mock.Mock
-        rc.getReconnectionInfo = mock.Mock(return_value=ri)
-        cs = connection_status.from_foolscap_reconnector(rc, 123)
-        self.assertEqual(cs.connected, True)
-        self.assertEqual(cs.summary, "Connected to h1 via hand1")
-        self.assertEqual(cs.non_connected_statuses, {"h2": "st2"})
-        self.assertEqual(cs.last_connection_time, 120)
-        self.assertEqual(cs.last_received_time, 123)
-
-    def test_reconnector_connected_listener(self):
-        ci = mock.Mock()
-        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
-        ci.connectionHandlers = {"h1": "hand1"}
-        ci.listenerStatus = ("listener1", "successful")
-        ci.winningHint = None
-        ci.establishedAt = 120
-        ri = mock.Mock()
-        ri.state = "connected"
-        ri.connectionInfo = ci
-        rc = mock.Mock
-        rc.getReconnectionInfo = mock.Mock(return_value=ri)
-        cs = connection_status.from_foolscap_reconnector(rc, 123)
-        self.assertEqual(cs.connected, True)
-        self.assertEqual(cs.summary, "Connected via listener (listener1)")
-        self.assertEqual(cs.non_connected_statuses,
-                         {"h1 via hand1": "st1", "h2": "st2"})
-        self.assertEqual(cs.last_connection_time, 120)
-        self.assertEqual(cs.last_received_time, 123)
-
-    def test_reconnector_connecting(self):
-        ci = mock.Mock()
-        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
-        ci.connectionHandlers = {"h1": "hand1"}
-        ri = mock.Mock()
-        ri.state = "connecting"
-        ri.connectionInfo = ci
-        rc = mock.Mock
-        rc.getReconnectionInfo = mock.Mock(return_value=ri)
-        cs = connection_status.from_foolscap_reconnector(rc, 123)
-        self.assertEqual(cs.connected, False)
-        self.assertEqual(cs.summary, "Trying to connect")
-        self.assertEqual(cs.non_connected_statuses,
-                         {"h1 via hand1": "st1", "h2": "st2"})
-        self.assertEqual(cs.last_connection_time, None)
-        self.assertEqual(cs.last_received_time, 123)
-
-    def test_reconnector_waiting(self):
-        ci = mock.Mock()
-        ci.connectorStatuses = {"h1": "st1", "h2": "st2"}
-        ci.connectionHandlers = {"h1": "hand1"}
-        ri = mock.Mock()
-        ri.state = "waiting"
-        ri.lastAttempt = 10
-        ri.nextAttempt = 20
-        ri.connectionInfo = ci
-        rc = mock.Mock
-        rc.getReconnectionInfo = mock.Mock(return_value=ri)
-        with mock.patch("time.time", return_value=12):
-            cs = connection_status.from_foolscap_reconnector(rc, 5)
-        self.assertEqual(cs.connected, False)
-        self.assertEqual(cs.summary,
-                         "Reconnecting in 8 seconds (last attempt 2s ago)")
-        self.assertEqual(cs.non_connected_statuses,
-                         {"h1 via hand1": "st1", "h2": "st2"})
-        self.assertEqual(cs.last_connection_time, None)
-        self.assertEqual(cs.last_received_time, 5)

src/allmydata/test/test_monitor.py

@@ -0,0 +1,52 @@
+"""
+Tests for allmydata.monitor.
+"""
+
+from __future__ import unicode_literals
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
+
+from twisted.trial import unittest
+
+from allmydata.monitor import Monitor, OperationCancelledError
+
+
+class MonitorTests(unittest.TestCase):
+    """Tests for the Monitor class."""
+
+    def test_cancellation(self):
+        """The monitor can be cancelled."""
+        m = Monitor()
+        self.assertFalse(m.is_cancelled())
+        m.raise_if_cancelled()
+        m.cancel()
+        self.assertTrue(m.is_cancelled())
+        with self.assertRaises(OperationCancelledError):
+            m.raise_if_cancelled()
+
+    def test_status(self):
+        """The monitor can have its status set."""
+        m = Monitor()
+        self.assertEqual(m.get_status(), None)
+        m.set_status("discombobulated")
+        self.assertEqual(m.get_status(), "discombobulated")
+
+    def test_finish(self):
+        """The monitor can finish."""
+        m = Monitor()
+        self.assertFalse(m.is_finished())
+        d = m.when_done()
+        self.assertNoResult(d)
+
+        result = m.finish(300)
+        self.assertEqual(result, 300)
+        self.assertEqual(m.get_status(), 300)
+        self.assertTrue(m.is_finished())
+
+        d.addBoth(self.assertEqual, 300)
+        return d

src/allmydata/test/test_storage_web.py

@@ -1,8 +1,19 @@
 """
 Tests for twisted.storage that uses Web APIs.
+
+Partially ported to Python 3.
 """
 
 from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    # Omitted list sinc it broke a test on Python 2. Shouldn't require further
+    # work, when we switch to Python 3 we'll be dropping this, anyway.
+    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, object, range, str, max, min  # noqa: F401
 
 import time
 import os.path
@@ -18,7 +29,10 @@ from twisted.web.template import flattenString
 # We need to use `nevow.inevow.IRequest` for now for compatibility
 # with the code in web/common.py.  Once nevow bits are gone from
 # web/common.py, we can use `twisted.web.iweb.IRequest` here.
-from nevow.inevow import IRequest
+if PY2:
+    from nevow.inevow import IRequest
+else:
+    from twisted.web.iweb import IRequest
 
 from twisted.web.server import Request
 from twisted.web.test.requesthelper import DummyChannel
@@ -36,11 +50,11 @@ from allmydata.web.storage import (
     StorageStatusElement,
     remove_prefix
 )
-from .test_storage import FakeCanary
+from .common_py3 import FakeCanary
 
 def remove_tags(s):
-    s = re.sub(r'<[^>]*>', ' ', s)
+    s = re.sub(br'<[^>]*>', b' ', s)
-    s = re.sub(r'\s+', ' ', s)
+    s = re.sub(br'\s+', b' ', s)
     return s
 
 def renderSynchronously(ss):
@@ -89,6 +103,7 @@ class MyStorageServer(StorageServer):
         self.bucket_counter = MyBucketCountingCrawler(self, statefile)
         self.bucket_counter.setServiceParent(self)
 
+
 class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
 
     def setUp(self):
@@ -100,7 +115,7 @@ class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
     def test_bucket_counter(self):
         basedir = "storage/BucketCounter/bucket_counter"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20)
+        ss = StorageServer(basedir, b"\x00" * 20)
         # to make sure we capture the bucket-counting-crawler in the middle
         # of a cycle, we reach in and reduce its maximum slice time to 0. We
         # also make it start sooner than usual.
@@ -113,12 +128,12 @@ class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
 
         # this sample is before the crawler has started doing anything
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Accepting new shares: Yes", s)
+        self.failUnlessIn(b"Accepting new shares: Yes", s)
-        self.failUnlessIn("Reserved space: - 0 B (0)", s)
+        self.failUnlessIn(b"Reserved space: - 0 B (0)", s)
-        self.failUnlessIn("Total buckets: Not computed yet", s)
+        self.failUnlessIn(b"Total buckets: Not computed yet", s)
-        self.failUnlessIn("Next crawl in", s)
+        self.failUnlessIn(b"Next crawl in", s)
 
         # give the bucket-counting-crawler one tick to get started. The
         # cpu_slice=0 will force it to yield right after it processes the
@@ -137,8 +152,8 @@ class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
             ss.bucket_counter.cpu_slice = 100.0 # finish as fast as possible
             html = renderSynchronously(w)
             s = remove_tags(html)
-            self.failUnlessIn(" Current crawl ", s)
+            self.failUnlessIn(b" Current crawl ", s)
-            self.failUnlessIn(" (next work in ", s)
+            self.failUnlessIn(b" (next work in ", s)
         d.addCallback(_check)
 
         # now give it enough time to complete a full cycle
@@ -149,15 +164,15 @@ class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
             ss.bucket_counter.cpu_slice = orig_cpu_slice
             html = renderSynchronously(w)
             s = remove_tags(html)
-            self.failUnlessIn("Total buckets: 0 (the number of", s)
+            self.failUnlessIn(b"Total buckets: 0 (the number of", s)
-            self.failUnless("Next crawl in 59 minutes" in s or "Next crawl in 60 minutes" in s, s)
+            self.failUnless(b"Next crawl in 59 minutes" in s or "Next crawl in 60 minutes" in s, s)
         d.addCallback(_check2)
         return d
 
     def test_bucket_counter_cleanup(self):
         basedir = "storage/BucketCounter/bucket_counter_cleanup"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20)
+        ss = StorageServer(basedir, b"\x00" * 20)
         # to make sure we capture the bucket-counting-crawler in the middle
         # of a cycle, we reach in and reduce its maximum slice time to 0.
         ss.bucket_counter.slow_start = 0
@@ -190,16 +205,16 @@ class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
         def _check2(ignored):
             ss.bucket_counter.cpu_slice = orig_cpu_slice
             s = ss.bucket_counter.get_state()
-            self.failIf(-12 in s["bucket-counts"], s["bucket-counts"].keys())
+            self.failIf(-12 in s["bucket-counts"], list(s["bucket-counts"].keys()))
             self.failIf("bogusprefix!" in s["storage-index-samples"],
-                        s["storage-index-samples"].keys())
+                        list(s["storage-index-samples"].keys()))
         d.addCallback(_check2)
         return d
 
     def test_bucket_counter_eta(self):
         basedir = "storage/BucketCounter/bucket_counter_eta"
         fileutil.make_dirs(basedir)
-        ss = MyStorageServer(basedir, "\x00" * 20)
+        ss = MyStorageServer(basedir, b"\x00" * 20)
         ss.bucket_counter.slow_start = 0
         # these will be fired inside finished_prefix()
         hooks = ss.bucket_counter.hook_ds = [defer.Deferred() for i in range(3)]
@@ -211,20 +226,20 @@ class BucketCounter(unittest.TestCase, pollmixin.PollMixin):
             # no ETA is available yet
             html = renderSynchronously(w)
             s = remove_tags(html)
-            self.failUnlessIn("complete (next work", s)
+            self.failUnlessIn(b"complete (next work", s)
 
         def _check_2(ignored):
             # one prefix has finished, so an ETA based upon that elapsed time
             # should be available.
             html = renderSynchronously(w)
             s = remove_tags(html)
-            self.failUnlessIn("complete (ETA ", s)
+            self.failUnlessIn(b"complete (ETA ", s)
 
         def _check_3(ignored):
             # two prefixes have finished
             html = renderSynchronously(w)
             s = remove_tags(html)
-            self.failUnlessIn("complete (ETA ", s)
+            self.failUnlessIn(b"complete (ETA ", s)
             d.callback("done")
 
         hooks[0].addCallback(_check_1).addErrback(d.errback)
@@ -275,27 +290,27 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
 
     def make_shares(self, ss):
         def make(si):
-            return (si, hashutil.tagged_hash("renew", si),
+            return (si, hashutil.tagged_hash(b"renew", si),
-                    hashutil.tagged_hash("cancel", si))
+                    hashutil.tagged_hash(b"cancel", si))
         def make_mutable(si):
-            return (si, hashutil.tagged_hash("renew", si),
+            return (si, hashutil.tagged_hash(b"renew", si),
-                    hashutil.tagged_hash("cancel", si),
+                    hashutil.tagged_hash(b"cancel", si),
-                    hashutil.tagged_hash("write-enabler", si))
+                    hashutil.tagged_hash(b"write-enabler", si))
         def make_extra_lease(si, num):
-            return (hashutil.tagged_hash("renew-%d" % num, si),
+            return (hashutil.tagged_hash(b"renew-%d" % num, si),
-                    hashutil.tagged_hash("cancel-%d" % num, si))
+                    hashutil.tagged_hash(b"cancel-%d" % num, si))
 
-        immutable_si_0, rs0, cs0 = make("\x00" * 16)
+        immutable_si_0, rs0, cs0 = make(b"\x00" * 16)
-        immutable_si_1, rs1, cs1 = make("\x01" * 16)
+        immutable_si_1, rs1, cs1 = make(b"\x01" * 16)
         rs1a, cs1a = make_extra_lease(immutable_si_1, 1)
-        mutable_si_2, rs2, cs2, we2 = make_mutable("\x02" * 16)
+        mutable_si_2, rs2, cs2, we2 = make_mutable(b"\x02" * 16)
-        mutable_si_3, rs3, cs3, we3 = make_mutable("\x03" * 16)
+        mutable_si_3, rs3, cs3, we3 = make_mutable(b"\x03" * 16)
         rs3a, cs3a = make_extra_lease(mutable_si_3, 1)
         sharenums = [0]
         canary = FakeCanary()
         # note: 'tahoe debug dump-share' will not handle this file, since the
         # inner contents are not a valid CHK share
-        data = "\xff" * 1000
+        data = b"\xff" * 1000
 
         a,w = ss.remote_allocate_buckets(immutable_si_0, rs0, cs0, sharenums,
                                          1000, canary)
@@ -322,7 +337,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
     def test_basic(self):
         basedir = "storage/LeaseCrawler/basic"
         fileutil.make_dirs(basedir)
-        ss = InstrumentedStorageServer(basedir, "\x00" * 20)
+        ss = InstrumentedStorageServer(basedir, b"\x00" * 20)
         # make it start sooner than usual.
         lc = ss.lease_checker
         lc.slow_start = 0
@@ -339,7 +354,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
                           storage_index_to_dir(immutable_si_0),
                           "not-a-share")
         f = open(fn, "wb")
-        f.write("I am not a share.\n")
+        f.write(b"I am not a share.\n")
         f.close()
 
         # this is before the crawl has started, so we're not in a cycle yet
@@ -398,25 +413,25 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         d.addCallback(lambda ign: renderDeferred(webstatus))
         def _check_html_in_cycle(html):
             s = remove_tags(html)
-            self.failUnlessIn("So far, this cycle has examined "
+            self.failUnlessIn(b"So far, this cycle has examined "
-                              "1 shares in 1 buckets (0 mutable / 1 immutable) ", s)
+                              b"1 shares in 1 buckets (0 mutable / 1 immutable) ", s)
-            self.failUnlessIn("and has recovered: "
+            self.failUnlessIn(b"and has recovered: "
-                              "0 shares, 0 buckets (0 mutable / 0 immutable), "
+                              b"0 shares, 0 buckets (0 mutable / 0 immutable), "
-                              "0 B (0 B / 0 B)", s)
+                              b"0 B (0 B / 0 B)", s)
-            self.failUnlessIn("If expiration were enabled, "
+            self.failUnlessIn(b"If expiration were enabled, "
-                              "we would have recovered: "
+                              b"we would have recovered: "
-                              "0 shares, 0 buckets (0 mutable / 0 immutable),"
+                              b"0 shares, 0 buckets (0 mutable / 0 immutable),"
-                              " 0 B (0 B / 0 B) by now", s)
+                              b" 0 B (0 B / 0 B) by now", s)
-            self.failUnlessIn("and the remainder of this cycle "
+            self.failUnlessIn(b"and the remainder of this cycle "
-                              "would probably recover: "
+                              b"would probably recover: "
-                              "0 shares, 0 buckets (0 mutable / 0 immutable),"
+                              b"0 shares, 0 buckets (0 mutable / 0 immutable),"
-                              " 0 B (0 B / 0 B)", s)
+                              b" 0 B (0 B / 0 B)", s)
-            self.failUnlessIn("and the whole cycle would probably recover: "
+            self.failUnlessIn(b"and the whole cycle would probably recover: "
-                              "0 shares, 0 buckets (0 mutable / 0 immutable),"
+                              b"0 shares, 0 buckets (0 mutable / 0 immutable),"
-                              " 0 B (0 B / 0 B)", s)
+                              b" 0 B (0 B / 0 B)", s)
-            self.failUnlessIn("if we were strictly using each lease's default "
+            self.failUnlessIn(b"if we were strictly using each lease's default "
-                              "31-day lease lifetime", s)
+                              b"31-day lease lifetime", s)
-            self.failUnlessIn("this cycle would be expected to recover: ", s)
+            self.failUnlessIn(b"this cycle would be expected to recover: ", s)
         d.addCallback(_check_html_in_cycle)
 
         # wait for the crawler to finish the first cycle. Nothing should have
@@ -473,11 +488,11 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         d.addCallback(lambda ign: renderDeferred(webstatus))
         def _check_html(html):
             s = remove_tags(html)
-            self.failUnlessIn("recovered: 0 shares, 0 buckets "
+            self.failUnlessIn(b"recovered: 0 shares, 0 buckets "
-                              "(0 mutable / 0 immutable), 0 B (0 B / 0 B) ", s)
+                              b"(0 mutable / 0 immutable), 0 B (0 B / 0 B) ", s)
-            self.failUnlessIn("and saw a total of 4 shares, 4 buckets "
+            self.failUnlessIn(b"and saw a total of 4 shares, 4 buckets "
-                              "(2 mutable / 2 immutable),", s)
+                              b"(2 mutable / 2 immutable),", s)
-            self.failUnlessIn("but expiration was not enabled", s)
+            self.failUnlessIn(b"but expiration was not enabled", s)
         d.addCallback(_check_html)
         d.addCallback(lambda ign: renderJSON(webstatus))
         def _check_json(raw):
@@ -505,7 +520,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         fileutil.make_dirs(basedir)
         # setting expiration_time to 2000 means that any lease which is more
         # than 2000s old will be expired.
-        ss = InstrumentedStorageServer(basedir, "\x00" * 20,
+        ss = InstrumentedStorageServer(basedir, b"\x00" * 20,
                                        expiration_enabled=True,
                                        expiration_mode="age",
                                        expiration_override_lease_duration=2000)
@@ -578,11 +593,11 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
             # predictor thinks we'll have 5 shares and that we'll delete them
             # all. This part of the test depends upon the SIs landing right
             # where they do now.
-            self.failUnlessIn("The remainder of this cycle is expected to "
+            self.failUnlessIn(b"The remainder of this cycle is expected to "
-                              "recover: 4 shares, 4 buckets", s)
+                              b"recover: 4 shares, 4 buckets", s)
-            self.failUnlessIn("The whole cycle is expected to examine "
+            self.failUnlessIn(b"The whole cycle is expected to examine "
-                              "5 shares in 5 buckets and to recover: "
+                              b"5 shares in 5 buckets and to recover: "
-                              "5 shares, 5 buckets", s)
+                              b"5 shares, 5 buckets", s)
         d.addCallback(_check_html_in_cycle)
 
         # wait for the crawler to finish the first cycle. Two shares should
@@ -632,9 +647,9 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         d.addCallback(lambda ign: renderDeferred(webstatus))
         def _check_html(html):
             s = remove_tags(html)
-            self.failUnlessIn("Expiration Enabled: expired leases will be removed", s)
+            self.failUnlessIn(b"Expiration Enabled: expired leases will be removed", s)
-            self.failUnlessIn("Leases created or last renewed more than 33 minutes ago will be considered expired.", s)
+            self.failUnlessIn(b"Leases created or last renewed more than 33 minutes ago will be considered expired.", s)
-            self.failUnlessIn(" recovered: 2 shares, 2 buckets (1 mutable / 1 immutable), ", s)
+            self.failUnlessIn(b" recovered: 2 shares, 2 buckets (1 mutable / 1 immutable), ", s)
         d.addCallback(_check_html)
         return d
 
@@ -645,7 +660,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         # is more than 2000s old will be expired.
         now = time.time()
         then = int(now - 2000)
-        ss = InstrumentedStorageServer(basedir, "\x00" * 20,
+        ss = InstrumentedStorageServer(basedir, b"\x00" * 20,
                                        expiration_enabled=True,
                                        expiration_mode="cutoff-date",
                                        expiration_cutoff_date=then)
@@ -722,11 +737,11 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
             # predictor thinks we'll have 5 shares and that we'll delete them
             # all. This part of the test depends upon the SIs landing right
             # where they do now.
-            self.failUnlessIn("The remainder of this cycle is expected to "
+            self.failUnlessIn(b"The remainder of this cycle is expected to "
-                              "recover: 4 shares, 4 buckets", s)
+                              b"recover: 4 shares, 4 buckets", s)
-            self.failUnlessIn("The whole cycle is expected to examine "
+            self.failUnlessIn(b"The whole cycle is expected to examine "
-                              "5 shares in 5 buckets and to recover: "
+                              b"5 shares in 5 buckets and to recover: "
-                              "5 shares, 5 buckets", s)
+                              b"5 shares, 5 buckets", s)
         d.addCallback(_check_html_in_cycle)
 
         # wait for the crawler to finish the first cycle. Two shares should
@@ -778,12 +793,13 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         d.addCallback(lambda ign: renderDeferred(webstatus))
         def _check_html(html):
             s = remove_tags(html)
-            self.failUnlessIn("Expiration Enabled:"
+            self.failUnlessIn(b"Expiration Enabled:"
-                              " expired leases will be removed", s)
+                              b" expired leases will be removed", s)
-            date = time.strftime("%Y-%m-%d (%d-%b-%Y) UTC", time.gmtime(then))
+            date = time.strftime(
-            substr = "Leases created or last renewed before %s will be considered expired." % date
+                u"%Y-%m-%d (%d-%b-%Y) UTC", time.gmtime(then)).encode("ascii")
+            substr =b"Leases created or last renewed before %s will be considered expired." % date
             self.failUnlessIn(substr, s)
-            self.failUnlessIn(" recovered: 2 shares, 2 buckets (1 mutable / 1 immutable), ", s)
+            self.failUnlessIn(b" recovered: 2 shares, 2 buckets (1 mutable / 1 immutable), ", s)
         d.addCallback(_check_html)
         return d
 
@@ -792,7 +808,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         fileutil.make_dirs(basedir)
         now = time.time()
         then = int(now - 2000)
-        ss = StorageServer(basedir, "\x00" * 20,
+        ss = StorageServer(basedir, b"\x00" * 20,
                            expiration_enabled=True,
                            expiration_mode="cutoff-date",
                            expiration_cutoff_date=then,
@@ -840,7 +856,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         d.addCallback(lambda ign: renderDeferred(webstatus))
         def _check_html(html):
             s = remove_tags(html)
-            self.failUnlessIn("The following sharetypes will be expired: immutable.", s)
+            self.failUnlessIn(b"The following sharetypes will be expired: immutable.", s)
         d.addCallback(_check_html)
         return d
 
@@ -849,7 +865,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         fileutil.make_dirs(basedir)
         now = time.time()
         then = int(now - 2000)
-        ss = StorageServer(basedir, "\x00" * 20,
+        ss = StorageServer(basedir, b"\x00" * 20,
                            expiration_enabled=True,
                            expiration_mode="cutoff-date",
                            expiration_cutoff_date=then,
@@ -897,7 +913,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         d.addCallback(lambda ign: renderDeferred(webstatus))
         def _check_html(html):
             s = remove_tags(html)
-            self.failUnlessIn("The following sharetypes will be expired: mutable.", s)
+            self.failUnlessIn(b"The following sharetypes will be expired: mutable.", s)
         d.addCallback(_check_html)
         return d
 
@@ -905,14 +921,14 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         basedir = "storage/LeaseCrawler/bad_mode"
         fileutil.make_dirs(basedir)
         e = self.failUnlessRaises(ValueError,
-                                  StorageServer, basedir, "\x00" * 20,
+                                  StorageServer, basedir, b"\x00" * 20,
                                   expiration_mode="bogus")
         self.failUnlessIn("GC mode 'bogus' must be 'age' or 'cutoff-date'", str(e))
 
     def test_limited_history(self):
         basedir = "storage/LeaseCrawler/limited_history"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20)
+        ss = StorageServer(basedir, b"\x00" * 20)
         # make it start sooner than usual.
         lc = ss.lease_checker
         lc.slow_start = 0
@@ -944,7 +960,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
     def test_unpredictable_future(self):
         basedir = "storage/LeaseCrawler/unpredictable_future"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20)
+        ss = StorageServer(basedir, b"\x00" * 20)
         # make it start sooner than usual.
         lc = ss.lease_checker
         lc.slow_start = 0
@@ -1007,7 +1023,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
     def test_no_st_blocks(self):
         basedir = "storage/LeaseCrawler/no_st_blocks"
         fileutil.make_dirs(basedir)
-        ss = No_ST_BLOCKS_StorageServer(basedir, "\x00" * 20,
+        ss = No_ST_BLOCKS_StorageServer(basedir, b"\x00" * 20,
                                         expiration_mode="age",
                                         expiration_override_lease_duration=-1000)
         # a negative expiration_time= means the "configured-"
@@ -1046,7 +1062,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
             ]
         basedir = "storage/LeaseCrawler/share_corruption"
         fileutil.make_dirs(basedir)
-        ss = InstrumentedStorageServer(basedir, "\x00" * 20)
+        ss = InstrumentedStorageServer(basedir, b"\x00" * 20)
         w = StorageStatus(ss)
         # make it start sooner than usual.
         lc = ss.lease_checker
@@ -1064,7 +1080,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         fn = os.path.join(ss.sharedir, storage_index_to_dir(first), "0")
         f = open(fn, "rb+")
         f.seek(0)
-        f.write("BAD MAGIC")
+        f.write(b"BAD MAGIC")
         f.close()
         # if get_share_file() doesn't see the correct mutable magic, it
         # assumes the file is an immutable share, and then
@@ -1073,7 +1089,7 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
         # UnknownImmutableContainerVersionError.
 
         # also create an empty bucket
-        empty_si = base32.b2a("\x04"*16)
+        empty_si = base32.b2a(b"\x04"*16)
         empty_bucket_dir = os.path.join(ss.sharedir,
                                         storage_index_to_dir(empty_si))
         fileutil.make_dirs(empty_bucket_dir)
@@ -1094,7 +1110,9 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
             rec = so_far["space-recovered"]
             self.failUnlessEqual(rec["examined-buckets"], 1)
             self.failUnlessEqual(rec["examined-shares"], 0)
-            self.failUnlessEqual(so_far["corrupt-shares"], [(first_b32, 0)])
+            [(actual_b32, i)] = so_far["corrupt-shares"]
+            actual_b32 = actual_b32.encode("ascii")
+            self.failUnlessEqual((actual_b32, i), (first_b32, 0))
         d.addCallback(_after_first_bucket)
 
         d.addCallback(lambda ign: renderJSON(w))
@@ -1103,13 +1121,15 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
             # grr. json turns all dict keys into strings.
             so_far = data["lease-checker"]["cycle-to-date"]
             corrupt_shares = so_far["corrupt-shares"]
-            # it also turns all tuples into lists
+            # it also turns all tuples into lists, and result is unicode:
-            self.failUnlessEqual(corrupt_shares, [[first_b32, 0]])
+            [(actual_b32, i)] = corrupt_shares
+            actual_b32 = actual_b32.encode("ascii")
+            self.failUnlessEqual([actual_b32, i], [first_b32, 0])
         d.addCallback(_check_json)
         d.addCallback(lambda ign: renderDeferred(w))
         def _check_html(html):
             s = remove_tags(html)
-            self.failUnlessIn("Corrupt shares: SI %s shnum 0" % first_b32, s)
+            self.failUnlessIn(b"Corrupt shares: SI %s shnum 0" % first_b32, s)
         d.addCallback(_check_html)
 
         def _wait():
@@ -1122,19 +1142,22 @@ class LeaseCrawler(unittest.TestCase, pollmixin.PollMixin):
             rec = last["space-recovered"]
             self.failUnlessEqual(rec["examined-buckets"], 5)
             self.failUnlessEqual(rec["examined-shares"], 3)
-            self.failUnlessEqual(last["corrupt-shares"], [(first_b32, 0)])
+            [(actual_b32, i)] = last["corrupt-shares"]
+            actual_b32 = actual_b32.encode("ascii")
+            self.failUnlessEqual((actual_b32, i), (first_b32, 0))
         d.addCallback(_after_first_cycle)
         d.addCallback(lambda ign: renderJSON(w))
         def _check_json_history(raw):
             data = json.loads(raw)
             last = data["lease-checker"]["history"]["0"]
-            corrupt_shares = last["corrupt-shares"]
+            [(actual_b32, i)] = last["corrupt-shares"]
-            self.failUnlessEqual(corrupt_shares, [[first_b32, 0]])
+            actual_b32 = actual_b32.encode("ascii")
+            self.failUnlessEqual([actual_b32, i], [first_b32, 0])
         d.addCallback(_check_json_history)
         d.addCallback(lambda ign: renderDeferred(w))
         def _check_html_history(html):
             s = remove_tags(html)
-            self.failUnlessIn("Corrupt shares: SI %s shnum 0" % first_b32, s)
+            self.failUnlessIn(b"Corrupt shares: SI %s shnum 0" % first_b32, s)
         d.addCallback(_check_html_history)
 
         def _cleanup(res):
@@ -1156,23 +1179,23 @@ class WebStatus(unittest.TestCase, pollmixin.PollMixin):
     def test_no_server(self):
         w = StorageStatus(None)
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>No Storage Server Running</h1>", html)
+        self.failUnlessIn(b"<h1>No Storage Server Running</h1>", html)
 
     def test_status(self):
         basedir = "storage/WebStatus/status"
         fileutil.make_dirs(basedir)
-        nodeid = "\x00" * 20
+        nodeid = b"\x00" * 20
         ss = StorageServer(basedir, nodeid)
         ss.setServiceParent(self.s)
         w = StorageStatus(ss, "nickname")
         d = renderDeferred(w)
         def _check_html(html):
-            self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+            self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
             s = remove_tags(html)
-            self.failUnlessIn("Server Nickname: nickname", s)
+            self.failUnlessIn(b"Server Nickname: nickname", s)
-            self.failUnlessIn("Server Nodeid: %s"  % base32.b2a(nodeid), s)
+            self.failUnlessIn(b"Server Nodeid: %s"  % base32.b2a(nodeid), s)
-            self.failUnlessIn("Accepting new shares: Yes", s)
+            self.failUnlessIn(b"Accepting new shares: Yes", s)
-            self.failUnlessIn("Reserved space: - 0 B (0)", s)
+            self.failUnlessIn(b"Reserved space: - 0 B (0)", s)
         d.addCallback(_check_html)
         d.addCallback(lambda ign: renderJSON(w))
         def _check_json(raw):
@@ -1195,15 +1218,15 @@ class WebStatus(unittest.TestCase, pollmixin.PollMixin):
         # (test runs on all platforms).
         basedir = "storage/WebStatus/status_no_disk_stats"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20)
+        ss = StorageServer(basedir, b"\x00" * 20)
         ss.setServiceParent(self.s)
         w = StorageStatus(ss)
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Accepting new shares: Yes", s)
+        self.failUnlessIn(b"Accepting new shares: Yes", s)
-        self.failUnlessIn("Total disk space: ?", s)
+        self.failUnlessIn(b"Total disk space: ?", s)
-        self.failUnlessIn("Space Available to Tahoe: ?", s)
+        self.failUnlessIn(b"Space Available to Tahoe: ?", s)
         self.failUnless(ss.get_available_space() is None)
 
     def test_status_bad_disk_stats(self):
@@ -1215,15 +1238,15 @@ class WebStatus(unittest.TestCase, pollmixin.PollMixin):
         # show that no shares will be accepted, and get_available_space() should be 0.
         basedir = "storage/WebStatus/status_bad_disk_stats"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20)
+        ss = StorageServer(basedir, b"\x00" * 20)
         ss.setServiceParent(self.s)
         w = StorageStatus(ss)
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Accepting new shares: No", s)
+        self.failUnlessIn(b"Accepting new shares: No", s)
-        self.failUnlessIn("Total disk space: ?", s)
+        self.failUnlessIn(b"Total disk space: ?", s)
-        self.failUnlessIn("Space Available to Tahoe: ?", s)
+        self.failUnlessIn(b"Space Available to Tahoe: ?", s)
         self.failUnlessEqual(ss.get_available_space(), 0)
 
     def test_status_right_disk_stats(self):
@@ -1235,7 +1258,7 @@ class WebStatus(unittest.TestCase, pollmixin.PollMixin):
 
         basedir = "storage/WebStatus/status_right_disk_stats"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20, reserved_space=reserved)
+        ss = StorageServer(basedir, b"\x00" * 20, reserved_space=reserved)
         expecteddir = ss.sharedir
 
         def call_get_disk_stats(whichdir, reserved_space=0):
@@ -1256,48 +1279,48 @@ class WebStatus(unittest.TestCase, pollmixin.PollMixin):
         w = StorageStatus(ss)
         html = renderSynchronously(w)
 
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Total disk space: 5.00 GB", s)
+        self.failUnlessIn(b"Total disk space: 5.00 GB", s)
-        self.failUnlessIn("Disk space used: - 1.00 GB", s)
+        self.failUnlessIn(b"Disk space used: - 1.00 GB", s)
-        self.failUnlessIn("Disk space free (root): 4.00 GB", s)
+        self.failUnlessIn(b"Disk space free (root): 4.00 GB", s)
-        self.failUnlessIn("Disk space free (non-root): 3.00 GB", s)
+        self.failUnlessIn(b"Disk space free (non-root): 3.00 GB", s)
-        self.failUnlessIn("Reserved space: - 1.00 GB", s)
+        self.failUnlessIn(b"Reserved space: - 1.00 GB", s)
-        self.failUnlessIn("Space Available to Tahoe: 2.00 GB", s)
+        self.failUnlessIn(b"Space Available to Tahoe: 2.00 GB", s)
         self.failUnlessEqual(ss.get_available_space(), 2*GB)
 
     def test_readonly(self):
         basedir = "storage/WebStatus/readonly"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20, readonly_storage=True)
+        ss = StorageServer(basedir, b"\x00" * 20, readonly_storage=True)
         ss.setServiceParent(self.s)
         w = StorageStatus(ss)
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Accepting new shares: No", s)
+        self.failUnlessIn(b"Accepting new shares: No", s)
 
     def test_reserved(self):
         basedir = "storage/WebStatus/reserved"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20, reserved_space=10e6)
+        ss = StorageServer(basedir, b"\x00" * 20, reserved_space=10e6)
         ss.setServiceParent(self.s)
         w = StorageStatus(ss)
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Reserved space: - 10.00 MB (10000000)", s)
+        self.failUnlessIn(b"Reserved space: - 10.00 MB (10000000)", s)
 
     def test_huge_reserved(self):
         basedir = "storage/WebStatus/reserved"
         fileutil.make_dirs(basedir)
-        ss = StorageServer(basedir, "\x00" * 20, reserved_space=10e6)
+        ss = StorageServer(basedir, b"\x00" * 20, reserved_space=10e6)
         ss.setServiceParent(self.s)
         w = StorageStatus(ss)
         html = renderSynchronously(w)
-        self.failUnlessIn("<h1>Storage Server Status</h1>", html)
+        self.failUnlessIn(b"<h1>Storage Server Status</h1>", html)
         s = remove_tags(html)
-        self.failUnlessIn("Reserved space: - 10.00 MB (10000000)", s)
+        self.failUnlessIn(b"Reserved space: - 10.00 MB (10000000)", s)
 
     def test_util(self):
         w = StorageStatusElement(None, None)

src/allmydata/test/test_system.py

@@ -980,6 +980,8 @@ class CountingDataUploadable(upload.Data):
 
 class SystemTest(SystemTestMixin, RunBinTahoeMixin, unittest.TestCase):
 
+    timeout = 180
+
     def test_connections(self):
         self.basedir = "system/SystemTest/test_connections"
         d = self.set_up_nodes()

src/allmydata/test/test_uri.py

@@ -1,3 +1,17 @@
+"""
+Tests for allmydata.uri.
+
+Ported to Python 3.
+"""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from future.builtins import filter, map, zip, ascii, chr, dict, hex, input, next, oct, open, pow, round, super, bytes, int, list, object, range, str, max, min  # noqa: F401
 
 import os
 from twisted.trial import unittest
@@ -40,24 +54,24 @@ class Literal(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnlessReallyEqual(u.get_verify_cap(), None)
 
     def test_empty(self):
-        data = "" # This data is some *very* small data!
+        data = b"" # This data is some *very* small data!
         return self._help_test(data)
 
     def test_pack(self):
-        data = "This is some small data"
+        data = b"This is some small data"
         return self._help_test(data)
 
     def test_nonascii(self):
-        data = "This contains \x00 and URI:LIT: and \n, oh my."
+        data = b"This contains \x00 and URI:LIT: and \n, oh my."
         return self._help_test(data)
 
 class Compare(testutil.ReallyEqualMixin, unittest.TestCase):
     def test_compare(self):
-        lit1 = uri.LiteralFileURI("some data")
+        lit1 = uri.LiteralFileURI(b"some data")
-        fileURI = 'URI:CHK:f5ahxa25t4qkktywz6teyfvcx4:opuioq7tj2y6idzfp6cazehtmgs5fdcebcz3cygrxyydvcozrmeq:3:10:345834'
+        fileURI = b'URI:CHK:f5ahxa25t4qkktywz6teyfvcx4:opuioq7tj2y6idzfp6cazehtmgs5fdcebcz3cygrxyydvcozrmeq:3:10:345834'
         chk1 = uri.CHKFileURI.init_from_string(fileURI)
         chk2 = uri.CHKFileURI.init_from_string(fileURI)
-        unk = uri.UnknownURI("lafs://from_the_future")
+        unk = uri.UnknownURI(b"lafs://from_the_future")
         self.failIfEqual(lit1, chk1)
         self.failUnlessReallyEqual(chk1, chk2)
         self.failIfEqual(chk1, "not actually a URI")
@@ -66,21 +80,24 @@ class Compare(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnlessReallyEqual(len(s), 3) # since chk1==chk2
 
     def test_is_uri(self):
-        lit1 = uri.LiteralFileURI("some data").to_string()
+        lit1 = uri.LiteralFileURI(b"some data").to_string()
         self.failUnless(uri.is_uri(lit1))
         self.failIf(uri.is_uri(None))
 
     def test_is_literal_file_uri(self):
-        lit1 = uri.LiteralFileURI("some data").to_string()
+        lit1 = uri.LiteralFileURI(b"some data").to_string()
         self.failUnless(uri.is_literal_file_uri(lit1))
         self.failIf(uri.is_literal_file_uri(None))
         self.failIf(uri.is_literal_file_uri("foo"))
         self.failIf(uri.is_literal_file_uri("ro.foo"))
-        self.failIf(uri.is_literal_file_uri("URI:LITfoo"))
+        self.failIf(uri.is_literal_file_uri(b"URI:LITfoo"))
         self.failUnless(uri.is_literal_file_uri("ro.URI:LIT:foo"))
         self.failUnless(uri.is_literal_file_uri("imm.URI:LIT:foo"))
 
     def test_has_uri_prefix(self):
+        self.failUnless(uri.has_uri_prefix(b"URI:foo"))
+        self.failUnless(uri.has_uri_prefix(b"ro.URI:foo"))
+        self.failUnless(uri.has_uri_prefix(b"imm.URI:foo"))
         self.failUnless(uri.has_uri_prefix("URI:foo"))
         self.failUnless(uri.has_uri_prefix("ro.URI:foo"))
         self.failUnless(uri.has_uri_prefix("imm.URI:foo"))
@@ -89,9 +106,9 @@ class Compare(testutil.ReallyEqualMixin, unittest.TestCase):
 
 class CHKFile(testutil.ReallyEqualMixin, unittest.TestCase):
     def test_pack(self):
-        key = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+        key = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
         storage_index = hashutil.storage_index_hash(key)
-        uri_extension_hash = hashutil.uri_extension_hash("stuff")
+        uri_extension_hash = hashutil.uri_extension_hash(b"stuff")
         needed_shares = 25
         total_shares = 100
         size = 1234
@@ -138,26 +155,26 @@ class CHKFile(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnlessReallyEqual(u.to_string(), u2imm.to_string())
 
         v = u.get_verify_cap()
-        self.failUnless(isinstance(v.to_string(), str))
+        self.failUnless(isinstance(v.to_string(), bytes))
         self.failUnless(v.is_readonly())
         self.failIf(v.is_mutable())
 
         v2 = uri.from_string(v.to_string())
         self.failUnlessReallyEqual(v, v2)
 
-        v3 = uri.CHKFileVerifierURI(storage_index="\x00"*16,
+        v3 = uri.CHKFileVerifierURI(storage_index=b"\x00"*16,
-                                    uri_extension_hash="\x00"*32,
+                                    uri_extension_hash=b"\x00"*32,
                                     needed_shares=3,
                                     total_shares=10,
                                     size=1234)
-        self.failUnless(isinstance(v3.to_string(), str))
+        self.failUnless(isinstance(v3.to_string(), bytes))
         self.failUnless(v3.is_readonly())
         self.failIf(v3.is_mutable())
 
     def test_pack_badly(self):
-        key = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+        key = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
         storage_index = hashutil.storage_index_hash(key)
-        uri_extension_hash = hashutil.uri_extension_hash("stuff")
+        uri_extension_hash = hashutil.uri_extension_hash(b"stuff")
         needed_shares = 25
         total_shares = 100
         size = 1234
@@ -186,35 +203,37 @@ class CHKFile(testutil.ReallyEqualMixin, unittest.TestCase):
 
 class Extension(testutil.ReallyEqualMixin, unittest.TestCase):
     def test_pack(self):
-        data = {"stuff": "value",
+        data = {b"stuff": b"value",
-                "size": 12,
+                b"size": 12,
-                "needed_shares": 3,
+                b"needed_shares": 3,
-                "big_hash": hashutil.tagged_hash("foo", "bar"),
+                b"big_hash": hashutil.tagged_hash(b"foo", b"bar"),
                 }
         ext = uri.pack_extension(data)
         d = uri.unpack_extension(ext)
-        self.failUnlessReallyEqual(d["stuff"], "value")
+        self.failUnlessReallyEqual(d[b"stuff"], b"value")
-        self.failUnlessReallyEqual(d["size"], 12)
+        self.failUnlessReallyEqual(d[b"size"], 12)
-        self.failUnlessReallyEqual(d["big_hash"], hashutil.tagged_hash("foo", "bar"))
+        self.failUnlessReallyEqual(d[b"big_hash"], hashutil.tagged_hash(b"foo", b"bar"))
 
         readable = uri.unpack_extension_readable(ext)
-        self.failUnlessReallyEqual(readable["needed_shares"], 3)
+        self.failUnlessReallyEqual(readable[b"needed_shares"], 3)
-        self.failUnlessReallyEqual(readable["stuff"], "value")
+        self.failUnlessReallyEqual(readable[b"stuff"], b"value")
-        self.failUnlessReallyEqual(readable["size"], 12)
+        self.failUnlessReallyEqual(readable[b"size"], 12)
-        self.failUnlessReallyEqual(readable["big_hash"],
+        self.failUnlessReallyEqual(readable[b"big_hash"],
-                             base32.b2a(hashutil.tagged_hash("foo", "bar")))
+                             base32.b2a(hashutil.tagged_hash(b"foo", b"bar")))
-        self.failUnlessReallyEqual(readable["UEB_hash"],
+        self.failUnlessReallyEqual(readable[b"UEB_hash"],
                              base32.b2a(hashutil.uri_extension_hash(ext)))
 
 class Unknown(testutil.ReallyEqualMixin, unittest.TestCase):
     def test_from_future(self):
         # any URI type that we don't recognize should be treated as unknown
-        future_uri = "I am a URI from the future. Whatever you do, don't "
+        future_uri = b"I am a URI from the future. Whatever you do, don't "
         u = uri.from_string(future_uri)
         self.failUnless(isinstance(u, uri.UnknownURI))
         self.failUnlessReallyEqual(u.to_string(), future_uri)
         self.failUnless(u.get_readonly() is None)
         self.failUnless(u.get_error() is None)
+        future_uri_unicode = future_uri.decode("utf-8")
+        self.assertEqual(future_uri, uri.from_string(future_uri_unicode).to_string())
 
         u2 = uri.UnknownURI(future_uri, error=CapConstraintError("..."))
         self.failUnlessReallyEqual(u.to_string(), future_uri)
@@ -222,7 +241,7 @@ class Unknown(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnless(isinstance(u2.get_error(), CapConstraintError))
 
         # Future caps might have non-ASCII chars in them. (Or maybe not, who can tell about the future?)
-        future_uri = u"I am a cap from the \u263A future. Whatever you ".encode('utf-8')
+        future_uri = u"I am a cap from the \u263A future. Whatever you ".encode("utf-8")
         u = uri.from_string(future_uri)
         self.failUnless(isinstance(u, uri.UnknownURI))
         self.failUnlessReallyEqual(u.to_string(), future_uri)
@@ -236,15 +255,15 @@ class Unknown(testutil.ReallyEqualMixin, unittest.TestCase):
 
 class Constraint(testutil.ReallyEqualMixin, unittest.TestCase):
     def test_constraint(self):
-        bad = "http://127.0.0.1:3456/uri/URI%3ADIR2%3Agh3l5rbvnv2333mrfvalmjfr4i%3Alz6l7u3z3b7g37s4zkdmfpx5ly4ib4m6thrpbusi6ys62qtc6mma/"
+        bad = b"http://127.0.0.1:3456/uri/URI%3ADIR2%3Agh3l5rbvnv2333mrfvalmjfr4i%3Alz6l7u3z3b7g37s4zkdmfpx5ly4ib4m6thrpbusi6ys62qtc6mma/"
         self.failUnlessRaises(uri.BadURIError, uri.DirectoryURI.init_from_string, bad)
-        fileURI = 'URI:CHK:gh3l5rbvnv2333mrfvalmjfr4i:lz6l7u3z3b7g37s4zkdmfpx5ly4ib4m6thrpbusi6ys62qtc6mma:3:10:345834'
+        fileURI = b'URI:CHK:gh3l5rbvnv2333mrfvalmjfr4i:lz6l7u3z3b7g37s4zkdmfpx5ly4ib4m6thrpbusi6ys62qtc6mma:3:10:345834'
         uri.CHKFileURI.init_from_string(fileURI)
 
 class Mutable(testutil.ReallyEqualMixin, unittest.TestCase):
     def setUp(self):
-        self.writekey = "\x01" * 16
+        self.writekey = b"\x01" * 16
-        self.fingerprint = "\x02" * 32
+        self.fingerprint = b"\x02" * 32
         self.readkey = hashutil.ssk_readkey_hash(self.writekey)
         self.storage_index = hashutil.ssk_storage_index_hash(self.readkey)
 
@@ -410,28 +429,29 @@ class Mutable(testutil.ReallyEqualMixin, unittest.TestCase):
         u1 = uri.WriteableMDMFFileURI(self.writekey, self.fingerprint)
         cap = u1.to_string()
 
-        cap2 = cap+":I COME FROM THE FUTURE"
+        cap2 = cap+b":I COME FROM THE FUTURE"
         u2 = uri.WriteableMDMFFileURI.init_from_string(cap2)
         self.failUnlessReallyEqual(self.writekey, u2.writekey)
         self.failUnlessReallyEqual(self.fingerprint, u2.fingerprint)
         self.failIf(u2.is_readonly())
         self.failUnless(u2.is_mutable())
 
-        cap3 = cap+":"+os.urandom(40) # parse *that*!
+
+        cap3 = cap+b":" + os.urandom(40)
         u3 = uri.WriteableMDMFFileURI.init_from_string(cap3)
         self.failUnlessReallyEqual(self.writekey, u3.writekey)
         self.failUnlessReallyEqual(self.fingerprint, u3.fingerprint)
         self.failIf(u3.is_readonly())
         self.failUnless(u3.is_mutable())
 
-        cap4 = u1.get_readonly().to_string()+":ooh scary future stuff"
+        cap4 = u1.get_readonly().to_string()+b":ooh scary future stuff"
         u4 = uri.from_string_mutable_filenode(cap4)
         self.failUnlessReallyEqual(self.readkey, u4.readkey)
         self.failUnlessReallyEqual(self.fingerprint, u4.fingerprint)
         self.failUnless(u4.is_readonly())
         self.failUnless(u4.is_mutable())
 
-        cap5 = u1.get_verify_cap().to_string()+":spoilers!"
+        cap5 = u1.get_verify_cap().to_string()+b":spoilers!"
         u5 = uri.from_string(cap5)
         self.failUnlessReallyEqual(self.storage_index, u5.storage_index)
         self.failUnlessReallyEqual(self.fingerprint, u5.fingerprint)
@@ -468,8 +488,8 @@ class Mutable(testutil.ReallyEqualMixin, unittest.TestCase):
 
 class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
     def test_pack(self):
-        writekey = "\x01" * 16
+        writekey = b"\x01" * 16
-        fingerprint = "\x02" * 32
+        fingerprint = b"\x02" * 32
 
         n = uri.WriteableSSKFileURI(writekey, fingerprint)
         u1 = uri.DirectoryURI(n)
@@ -536,8 +556,8 @@ class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
                                  u1.get_verify_cap()._filenode_uri)
 
     def test_immutable(self):
-        readkey = "\x01" * 16
+        readkey = b"\x01" * 16
-        uri_extension_hash = hashutil.uri_extension_hash("stuff")
+        uri_extension_hash = hashutil.uri_extension_hash(b"stuff")
         needed_shares = 3
         total_shares = 10
         size = 1234
@@ -548,7 +568,7 @@ class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
                                total_shares=total_shares,
                                size=size)
         fncap = fnuri.to_string()
-        self.failUnlessReallyEqual(fncap, "URI:CHK:aeaqcaibaeaqcaibaeaqcaibae:nf3nimquen7aeqm36ekgxomalstenpkvsdmf6fplj7swdatbv5oa:3:10:1234")
+        self.failUnlessReallyEqual(fncap, b"URI:CHK:aeaqcaibaeaqcaibaeaqcaibae:nf3nimquen7aeqm36ekgxomalstenpkvsdmf6fplj7swdatbv5oa:3:10:1234")
         u1 = uri.ImmutableDirectoryURI(fnuri)
         self.failUnless(u1.is_readonly())
         self.failIf(u1.is_mutable())
@@ -587,20 +607,20 @@ class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnless(IVerifierURI.providedBy(u2_verifier))
         u2vs = u2_verifier.to_string()
         # URI:DIR2-CHK-Verifier:$key:$ueb:$k:$n:$size
-        self.failUnless(u2vs.startswith("URI:DIR2-CHK-Verifier:"), u2vs)
+        self.failUnless(u2vs.startswith(b"URI:DIR2-CHK-Verifier:"), u2vs)
         u2_verifier_fileuri = u2_verifier.get_filenode_cap()
         self.failUnless(IVerifierURI.providedBy(u2_verifier_fileuri))
         u2vfs = u2_verifier_fileuri.to_string()
         # URI:CHK-Verifier:$key:$ueb:$k:$n:$size
         self.failUnlessReallyEqual(u2vfs, fnuri.get_verify_cap().to_string())
-        self.failUnlessReallyEqual(u2vs[len("URI:DIR2-"):], u2vfs[len("URI:"):])
+        self.failUnlessReallyEqual(u2vs[len(b"URI:DIR2-"):], u2vfs[len(b"URI:"):])
         self.failUnless(str(u2_verifier))
 
     def test_literal(self):
-        u0 = uri.LiteralFileURI("data")
+        u0 = uri.LiteralFileURI(b"data")
         u1 = uri.LiteralDirectoryURI(u0)
         self.failUnless(str(u1))
-        self.failUnlessReallyEqual(u1.to_string(), "URI:DIR2-LIT:mrqxiyi")
+        self.failUnlessReallyEqual(u1.to_string(), b"URI:DIR2-LIT:mrqxiyi")
         self.failUnless(u1.is_readonly())
         self.failIf(u1.is_mutable())
         self.failUnless(IURI.providedBy(u1))
@@ -608,11 +628,11 @@ class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnless(IDirnodeURI.providedBy(u1))
         self.failUnlessReallyEqual(u1.get_verify_cap(), None)
         self.failUnlessReallyEqual(u1.get_storage_index(), None)
-        self.failUnlessReallyEqual(u1.abbrev_si(), "<LIT>")
+        self.failUnlessReallyEqual(u1.abbrev_si(), b"<LIT>")
 
     def test_mdmf(self):
-        writekey = "\x01" * 16
+        writekey = b"\x01" * 16
-        fingerprint = "\x02" * 32
+        fingerprint = b"\x02" * 32
         uri1 = uri.WriteableMDMFFileURI(writekey, fingerprint)
         d1 = uri.MDMFDirectoryURI(uri1)
         self.failIf(d1.is_readonly())
@@ -635,8 +655,8 @@ class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
         self.failUnlessIsInstance(d3, uri.UnknownURI)
 
     def test_mdmf_attenuation(self):
-        writekey = "\x01" * 16
+        writekey = b"\x01" * 16
-        fingerprint = "\x02" * 32
+        fingerprint = b"\x02" * 32
 
         uri1 = uri.WriteableMDMFFileURI(writekey, fingerprint)
         d1 = uri.MDMFDirectoryURI(uri1)
@@ -676,8 +696,8 @@ class Dirnode(testutil.ReallyEqualMixin, unittest.TestCase):
 
     def test_mdmf_verifier(self):
         # I'm not sure what I want to write here yet.
-        writekey = "\x01" * 16
+        writekey = b"\x01" * 16
-        fingerprint = "\x02" * 32
+        fingerprint = b"\x02" * 32
         uri1 = uri.WriteableMDMFFileURI(writekey, fingerprint)
         d1 = uri.MDMFDirectoryURI(uri1)
         v1 = d1.get_verify_cap()

src/allmydata/uri.py

@@ -1,3 +1,22 @@
+"""
+URIs (kinda sorta, really they're capabilities?).
+
+Ported to Python 3.
+
+Methods ending in to_string() are actually to_bytes(), possibly should be fixed
+in follow-up port.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    # Don't import bytes, to prevent leaks.
+    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, dict, list, object, range, str, max, min  # noqa: F401
+
+from past.builtins import unicode, long
 
 import re
 
@@ -24,10 +43,10 @@ class BadURIError(CapConstraintError):
 #  - make variable and method names consistently use _uri for an URI string,
 #    and _cap for a Cap object (decoded URI)
 
-BASE32STR_128bits = '(%s{25}%s)' % (base32.BASE32CHAR, base32.BASE32CHAR_3bits)
+BASE32STR_128bits = b'(%s{25}%s)' % (base32.BASE32CHAR, base32.BASE32CHAR_3bits)
-BASE32STR_256bits = '(%s{51}%s)' % (base32.BASE32CHAR, base32.BASE32CHAR_1bits)
+BASE32STR_256bits = b'(%s{51}%s)' % (base32.BASE32CHAR, base32.BASE32CHAR_1bits)
 
-NUMBER='([0-9]+)'
+NUMBER=b'([0-9]+)'
 
 
 class _BaseURI(object):
@@ -53,10 +72,10 @@ class _BaseURI(object):
 @implementer(IURI, IImmutableFileURI)
 class CHKFileURI(_BaseURI):
 
-    BASE_STRING='URI:CHK:'
+    BASE_STRING=b'URI:CHK:'
-    STRING_RE=re.compile('^URI:CHK:'+BASE32STR_128bits+':'+
+    STRING_RE=re.compile(b'^URI:CHK:'+BASE32STR_128bits+b':'+
-                         BASE32STR_256bits+':'+NUMBER+':'+NUMBER+':'+NUMBER+
+                         BASE32STR_256bits+b':'+NUMBER+b':'+NUMBER+b':'+NUMBER+
-                         '$')
+                         b'$')
 
     def __init__(self, key, uri_extension_hash, needed_shares, total_shares,
                  size):
@@ -82,7 +101,7 @@ class CHKFileURI(_BaseURI):
         assert isinstance(self.total_shares, int)
         assert isinstance(self.size, (int,long))
 
-        return ('URI:CHK:%s:%s:%d:%d:%d' %
+        return (b'URI:CHK:%s:%s:%d:%d:%d' %
                 (base32.b2a(self.key),
                  base32.b2a(self.uri_extension_hash),
                  self.needed_shares,
@@ -112,9 +131,9 @@ class CHKFileURI(_BaseURI):
 @implementer(IVerifierURI)
 class CHKFileVerifierURI(_BaseURI):
 
-    BASE_STRING='URI:CHK-Verifier:'
+    BASE_STRING=b'URI:CHK-Verifier:'
-    STRING_RE=re.compile('^URI:CHK-Verifier:'+BASE32STR_128bits+':'+
+    STRING_RE=re.compile(b'^URI:CHK-Verifier:'+BASE32STR_128bits+b':'+
-                         BASE32STR_256bits+':'+NUMBER+':'+NUMBER+':'+NUMBER)
+                         BASE32STR_256bits+b':'+NUMBER+b':'+NUMBER+b':'+NUMBER)
 
     def __init__(self, storage_index, uri_extension_hash,
                  needed_shares, total_shares, size):
@@ -138,7 +157,7 @@ class CHKFileVerifierURI(_BaseURI):
         assert isinstance(self.total_shares, int)
         assert isinstance(self.size, (int,long))
 
-        return ('URI:CHK-Verifier:%s:%s:%d:%d:%d' %
+        return (b'URI:CHK-Verifier:%s:%s:%d:%d:%d' %
                 (si_b2a(self.storage_index),
                  base32.b2a(self.uri_extension_hash),
                  self.needed_shares,
@@ -161,12 +180,12 @@ class CHKFileVerifierURI(_BaseURI):
 @implementer(IURI, IImmutableFileURI)
 class LiteralFileURI(_BaseURI):
 
-    BASE_STRING='URI:LIT:'
+    BASE_STRING=b'URI:LIT:'
-    STRING_RE=re.compile('^URI:LIT:'+base32.BASE32STR_anybytes+'$')
+    STRING_RE=re.compile(b'^URI:LIT:'+base32.BASE32STR_anybytes+b'$')
 
     def __init__(self, data=None):
         if data is not None:
-            assert isinstance(data, str)
+            assert isinstance(data, bytes)
             self.data = data
 
     @classmethod
@@ -177,7 +196,7 @@ class LiteralFileURI(_BaseURI):
         return cls(base32.a2b(mo.group(1)))
 
     def to_string(self):
-        return 'URI:LIT:%s' % base32.b2a(self.data)
+        return b'URI:LIT:%s' % base32.b2a(self.data)
 
     def is_readonly(self):
         return True
@@ -202,9 +221,9 @@ class LiteralFileURI(_BaseURI):
 @implementer(IURI, IMutableFileURI)
 class WriteableSSKFileURI(_BaseURI):
 
-    BASE_STRING='URI:SSK:'
+    BASE_STRING=b'URI:SSK:'
-    STRING_RE=re.compile('^'+BASE_STRING+BASE32STR_128bits+':'+
+    STRING_RE=re.compile(b'^'+BASE_STRING+BASE32STR_128bits+b':'+
-                         BASE32STR_256bits+'$')
+                         BASE32STR_256bits+b'$')
 
     def __init__(self, writekey, fingerprint):
         self.writekey = writekey
@@ -221,10 +240,10 @@ class WriteableSSKFileURI(_BaseURI):
         return cls(base32.a2b(mo.group(1)), base32.a2b(mo.group(2)))
 
     def to_string(self):
-        assert isinstance(self.writekey, str)
+        assert isinstance(self.writekey, bytes)
-        assert isinstance(self.fingerprint, str)
+        assert isinstance(self.fingerprint, bytes)
-        return 'URI:SSK:%s:%s' % (base32.b2a(self.writekey),
+        return b'URI:SSK:%s:%s' % (base32.b2a(self.writekey),
-                                  base32.b2a(self.fingerprint))
+                                   base32.b2a(self.fingerprint))
 
     def __repr__(self):
         return "<%s %s>" % (self.__class__.__name__, self.abbrev())
@@ -251,8 +270,8 @@ class WriteableSSKFileURI(_BaseURI):
 @implementer(IURI, IMutableFileURI)
 class ReadonlySSKFileURI(_BaseURI):
 
-    BASE_STRING='URI:SSK-RO:'
+    BASE_STRING=b'URI:SSK-RO:'
-    STRING_RE=re.compile('^URI:SSK-RO:'+BASE32STR_128bits+':'+BASE32STR_256bits+'$')
+    STRING_RE=re.compile(b'^URI:SSK-RO:'+BASE32STR_128bits+b':'+BASE32STR_256bits+b'$')
 
     def __init__(self, readkey, fingerprint):
         self.readkey = readkey
@@ -268,10 +287,10 @@ class ReadonlySSKFileURI(_BaseURI):
         return cls(base32.a2b(mo.group(1)), base32.a2b(mo.group(2)))
 
     def to_string(self):
-        assert isinstance(self.readkey, str)
+        assert isinstance(self.readkey, bytes)
-        assert isinstance(self.fingerprint, str)
+        assert isinstance(self.fingerprint, bytes)
-        return 'URI:SSK-RO:%s:%s' % (base32.b2a(self.readkey),
+        return b'URI:SSK-RO:%s:%s' % (base32.b2a(self.readkey),
-                                     base32.b2a(self.fingerprint))
+                                      base32.b2a(self.fingerprint))
 
     def __repr__(self):
         return "<%s %s>" % (self.__class__.__name__, self.abbrev())
@@ -298,8 +317,8 @@ class ReadonlySSKFileURI(_BaseURI):
 @implementer(IVerifierURI)
 class SSKVerifierURI(_BaseURI):
 
-    BASE_STRING='URI:SSK-Verifier:'
+    BASE_STRING=b'URI:SSK-Verifier:'
-    STRING_RE=re.compile('^'+BASE_STRING+BASE32STR_128bits+':'+BASE32STR_256bits+'$')
+    STRING_RE=re.compile(b'^'+BASE_STRING+BASE32STR_128bits+b':'+BASE32STR_256bits+b'$')
 
     def __init__(self, storage_index, fingerprint):
         assert len(storage_index) == 16
@@ -314,10 +333,10 @@ class SSKVerifierURI(_BaseURI):
         return cls(si_a2b(mo.group(1)), base32.a2b(mo.group(2)))
 
     def to_string(self):
-        assert isinstance(self.storage_index, str)
+        assert isinstance(self.storage_index, bytes)
-        assert isinstance(self.fingerprint, str)
+        assert isinstance(self.fingerprint, bytes)
-        return 'URI:SSK-Verifier:%s:%s' % (si_b2a(self.storage_index),
+        return b'URI:SSK-Verifier:%s:%s' % (si_b2a(self.storage_index),
-                                           base32.b2a(self.fingerprint))
+                                            base32.b2a(self.fingerprint))
 
     def is_readonly(self):
         return True
@@ -335,8 +354,8 @@ class SSKVerifierURI(_BaseURI):
 @implementer(IURI, IMutableFileURI)
 class WriteableMDMFFileURI(_BaseURI):
 
-    BASE_STRING='URI:MDMF:'
+    BASE_STRING=b'URI:MDMF:'
-    STRING_RE=re.compile('^'+BASE_STRING+BASE32STR_128bits+':'+BASE32STR_256bits+'(:|$)')
+    STRING_RE=re.compile(b'^'+BASE_STRING+BASE32STR_128bits+b':'+BASE32STR_256bits+b'(:|$)')
 
     def __init__(self, writekey, fingerprint):
         self.writekey = writekey
@@ -353,10 +372,10 @@ class WriteableMDMFFileURI(_BaseURI):
         return cls(base32.a2b(mo.group(1)), base32.a2b(mo.group(2)))
 
     def to_string(self):
-        assert isinstance(self.writekey, str)
+        assert isinstance(self.writekey, bytes)
-        assert isinstance(self.fingerprint, str)
+        assert isinstance(self.fingerprint, bytes)
-        ret = 'URI:MDMF:%s:%s' % (base32.b2a(self.writekey),
+        ret = b'URI:MDMF:%s:%s' % (base32.b2a(self.writekey),
-                                  base32.b2a(self.fingerprint))
+                                   base32.b2a(self.fingerprint))
         return ret
 
     def __repr__(self):
@@ -384,8 +403,8 @@ class WriteableMDMFFileURI(_BaseURI):
 @implementer(IURI, IMutableFileURI)
 class ReadonlyMDMFFileURI(_BaseURI):
 
-    BASE_STRING='URI:MDMF-RO:'
+    BASE_STRING=b'URI:MDMF-RO:'
-    STRING_RE=re.compile('^' +BASE_STRING+BASE32STR_128bits+':'+BASE32STR_256bits+'(:|$)')
+    STRING_RE=re.compile(b'^' +BASE_STRING+BASE32STR_128bits+b':'+BASE32STR_256bits+b'(:|$)')
 
     def __init__(self, readkey, fingerprint):
         self.readkey = readkey
@@ -402,10 +421,10 @@ class ReadonlyMDMFFileURI(_BaseURI):
         return cls(base32.a2b(mo.group(1)), base32.a2b(mo.group(2)))
 
     def to_string(self):
-        assert isinstance(self.readkey, str)
+        assert isinstance(self.readkey, bytes)
-        assert isinstance(self.fingerprint, str)
+        assert isinstance(self.fingerprint, bytes)
-        ret = 'URI:MDMF-RO:%s:%s' % (base32.b2a(self.readkey),
+        ret = b'URI:MDMF-RO:%s:%s' % (base32.b2a(self.readkey),
-                                     base32.b2a(self.fingerprint))
+                                      base32.b2a(self.fingerprint))
         return ret
 
     def __repr__(self):
@@ -433,8 +452,8 @@ class ReadonlyMDMFFileURI(_BaseURI):
 @implementer(IVerifierURI)
 class MDMFVerifierURI(_BaseURI):
 
-    BASE_STRING='URI:MDMF-Verifier:'
+    BASE_STRING=b'URI:MDMF-Verifier:'
-    STRING_RE=re.compile('^'+BASE_STRING+BASE32STR_128bits+':'+BASE32STR_256bits+'(:|$)')
+    STRING_RE=re.compile(b'^'+BASE_STRING+BASE32STR_128bits+b':'+BASE32STR_256bits+b'(:|$)')
 
     def __init__(self, storage_index, fingerprint):
         assert len(storage_index) == 16
@@ -449,10 +468,10 @@ class MDMFVerifierURI(_BaseURI):
         return cls(si_a2b(mo.group(1)), base32.a2b(mo.group(2)))
 
     def to_string(self):
-        assert isinstance(self.storage_index, str)
+        assert isinstance(self.storage_index, bytes)
-        assert isinstance(self.fingerprint, str)
+        assert isinstance(self.fingerprint, bytes)
-        ret = 'URI:MDMF-Verifier:%s:%s' % (si_b2a(self.storage_index),
+        ret = b'URI:MDMF-Verifier:%s:%s' % (si_b2a(self.storage_index),
-                                           base32.b2a(self.fingerprint))
+                                            base32.b2a(self.fingerprint))
         return ret
 
     def is_readonly(self):
@@ -494,12 +513,12 @@ class _DirectoryBaseURI(_BaseURI):
         return self.BASE_STRING+bits
 
     def abbrev(self):
-        return self._filenode_uri.to_string().split(':')[2][:5]
+        return self._filenode_uri.to_string().split(b':')[2][:5]
 
     def abbrev_si(self):
         si = self._filenode_uri.get_storage_index()
         if si is None:
-            return "<LIT>"
+            return b"<LIT>"
         return base32.b2a(si)[:5]
 
     def is_mutable(self):
@@ -518,8 +537,8 @@ class _DirectoryBaseURI(_BaseURI):
 @implementer(IDirectoryURI)
 class DirectoryURI(_DirectoryBaseURI):
 
-    BASE_STRING='URI:DIR2:'
+    BASE_STRING=b'URI:DIR2:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=WriteableSSKFileURI
 
     def __init__(self, filenode_uri=None):
@@ -537,8 +556,8 @@ class DirectoryURI(_DirectoryBaseURI):
 @implementer(IReadonlyDirectoryURI)
 class ReadonlyDirectoryURI(_DirectoryBaseURI):
 
-    BASE_STRING='URI:DIR2-RO:'
+    BASE_STRING=b'URI:DIR2-RO:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=ReadonlySSKFileURI
 
     def __init__(self, filenode_uri=None):
@@ -571,8 +590,8 @@ class _ImmutableDirectoryBaseURI(_DirectoryBaseURI):
 
 
 class ImmutableDirectoryURI(_ImmutableDirectoryBaseURI):
-    BASE_STRING='URI:DIR2-CHK:'
+    BASE_STRING=b'URI:DIR2-CHK:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=CHKFileURI
 
     def get_verify_cap(self):
@@ -581,8 +600,8 @@ class ImmutableDirectoryURI(_ImmutableDirectoryBaseURI):
 
 
 class LiteralDirectoryURI(_ImmutableDirectoryBaseURI):
-    BASE_STRING='URI:DIR2-LIT:'
+    BASE_STRING=b'URI:DIR2-LIT:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=LiteralFileURI
 
     def get_verify_cap(self):
@@ -593,8 +612,8 @@ class LiteralDirectoryURI(_ImmutableDirectoryBaseURI):
 @implementer(IDirectoryURI)
 class MDMFDirectoryURI(_DirectoryBaseURI):
 
-    BASE_STRING='URI:DIR2-MDMF:'
+    BASE_STRING=b'URI:DIR2-MDMF:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=WriteableMDMFFileURI
 
     def __init__(self, filenode_uri=None):
@@ -615,8 +634,8 @@ class MDMFDirectoryURI(_DirectoryBaseURI):
 @implementer(IReadonlyDirectoryURI)
 class ReadonlyMDMFDirectoryURI(_DirectoryBaseURI):
 
-    BASE_STRING='URI:DIR2-MDMF-RO:'
+    BASE_STRING=b'URI:DIR2-MDMF-RO:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=ReadonlyMDMFFileURI
 
     def __init__(self, filenode_uri=None):
@@ -653,8 +672,8 @@ def wrap_dirnode_cap(filecap):
 @implementer(IVerifierURI)
 class MDMFDirectoryURIVerifier(_DirectoryBaseURI):
 
-    BASE_STRING='URI:DIR2-MDMF-Verifier:'
+    BASE_STRING=b'URI:DIR2-MDMF-Verifier:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=MDMFVerifierURI
 
     def __init__(self, filenode_uri=None):
@@ -678,8 +697,8 @@ class MDMFDirectoryURIVerifier(_DirectoryBaseURI):
 @implementer(IVerifierURI)
 class DirectoryURIVerifier(_DirectoryBaseURI):
 
-    BASE_STRING='URI:DIR2-Verifier:'
+    BASE_STRING=b'URI:DIR2-Verifier:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=SSKVerifierURI
 
     def __init__(self, filenode_uri=None):
@@ -702,8 +721,8 @@ class DirectoryURIVerifier(_DirectoryBaseURI):
 
 @implementer(IVerifierURI)
 class ImmutableDirectoryURIVerifier(DirectoryURIVerifier):
-    BASE_STRING='URI:DIR2-CHK-Verifier:'
+    BASE_STRING=b'URI:DIR2-CHK-Verifier:'
-    BASE_STRING_RE=re.compile('^'+BASE_STRING)
+    BASE_STRING_RE=re.compile(b'^'+BASE_STRING)
     INNER_URI_CLASS=CHKFileVerifierURI
 
 
@@ -725,12 +744,15 @@ class UnknownURI(object):
         return None
 
 
-ALLEGED_READONLY_PREFIX = 'ro.'
+ALLEGED_READONLY_PREFIX = b'ro.'
-ALLEGED_IMMUTABLE_PREFIX = 'imm.'
+ALLEGED_IMMUTABLE_PREFIX = b'imm.'
 
 def from_string(u, deep_immutable=False, name=u"<unknown name>"):
-    if not isinstance(u, str):
+    """Create URI from either unicode or byte string."""
-        raise TypeError("URI must be str: %r" % (u,))
+    if isinstance(u, unicode):
+        u = u.encode("utf-8")
+    if not isinstance(u, bytes):
+        raise TypeError("URI must be unicode string or bytes: %r" % (u,))
 
     # We allow and check ALLEGED_READONLY_PREFIX or ALLEGED_IMMUTABLE_PREFIX
     # on all URIs, even though we would only strictly need to do so for caps of
@@ -748,62 +770,62 @@ def from_string(u, deep_immutable=False, name=u"<unknown name>"):
 
     error = None
     try:
-        if s.startswith('URI:CHK:'):
+        if s.startswith(b'URI:CHK:'):
             return CHKFileURI.init_from_string(s)
-        elif s.startswith('URI:CHK-Verifier:'):
+        elif s.startswith(b'URI:CHK-Verifier:'):
             return CHKFileVerifierURI.init_from_string(s)
-        elif s.startswith('URI:LIT:'):
+        elif s.startswith(b'URI:LIT:'):
             return LiteralFileURI.init_from_string(s)
-        elif s.startswith('URI:SSK:'):
+        elif s.startswith(b'URI:SSK:'):
             if can_be_writeable:
                 return WriteableSSKFileURI.init_from_string(s)
             kind = "URI:SSK file writecap"
-        elif s.startswith('URI:SSK-RO:'):
+        elif s.startswith(b'URI:SSK-RO:'):
             if can_be_mutable:
                 return ReadonlySSKFileURI.init_from_string(s)
             kind = "URI:SSK-RO readcap to a mutable file"
-        elif s.startswith('URI:SSK-Verifier:'):
+        elif s.startswith(b'URI:SSK-Verifier:'):
             return SSKVerifierURI.init_from_string(s)
-        elif s.startswith('URI:MDMF:'):
+        elif s.startswith(b'URI:MDMF:'):
             if can_be_writeable:
                 return WriteableMDMFFileURI.init_from_string(s)
             kind = "URI:MDMF file writecap"
-        elif s.startswith('URI:MDMF-RO:'):
+        elif s.startswith(b'URI:MDMF-RO:'):
             if can_be_mutable:
                 return ReadonlyMDMFFileURI.init_from_string(s)
             kind = "URI:MDMF-RO readcap to a mutable file"
-        elif s.startswith('URI:MDMF-Verifier:'):
+        elif s.startswith(b'URI:MDMF-Verifier:'):
             return MDMFVerifierURI.init_from_string(s)
-        elif s.startswith('URI:DIR2:'):
+        elif s.startswith(b'URI:DIR2:'):
             if can_be_writeable:
                 return DirectoryURI.init_from_string(s)
             kind = "URI:DIR2 directory writecap"
-        elif s.startswith('URI:DIR2-RO:'):
+        elif s.startswith(b'URI:DIR2-RO:'):
             if can_be_mutable:
                 return ReadonlyDirectoryURI.init_from_string(s)
             kind = "URI:DIR2-RO readcap to a mutable directory"
-        elif s.startswith('URI:DIR2-Verifier:'):
+        elif s.startswith(b'URI:DIR2-Verifier:'):
             return DirectoryURIVerifier.init_from_string(s)
-        elif s.startswith('URI:DIR2-CHK:'):
+        elif s.startswith(b'URI:DIR2-CHK:'):
             return ImmutableDirectoryURI.init_from_string(s)
-        elif s.startswith('URI:DIR2-CHK-Verifier:'):
+        elif s.startswith(b'URI:DIR2-CHK-Verifier:'):
             return ImmutableDirectoryURIVerifier.init_from_string(s)
-        elif s.startswith('URI:DIR2-LIT:'):
+        elif s.startswith(b'URI:DIR2-LIT:'):
             return LiteralDirectoryURI.init_from_string(s)
-        elif s.startswith('URI:DIR2-MDMF:'):
+        elif s.startswith(b'URI:DIR2-MDMF:'):
             if can_be_writeable:
                 return MDMFDirectoryURI.init_from_string(s)
             kind = "URI:DIR2-MDMF directory writecap"
-        elif s.startswith('URI:DIR2-MDMF-RO:'):
+        elif s.startswith(b'URI:DIR2-MDMF-RO:'):
             if can_be_mutable:
                 return ReadonlyMDMFDirectoryURI.init_from_string(s)
             kind = "URI:DIR2-MDMF-RO readcap to a mutable directory"
-        elif s.startswith('URI:DIR2-MDMF-Verifier:'):
+        elif s.startswith(b'URI:DIR2-MDMF-Verifier:'):
             return MDMFDirectoryURIVerifier.init_from_string(s)
-        elif s.startswith('x-tahoe-future-test-writeable:') and not can_be_writeable:
+        elif s.startswith(b'x-tahoe-future-test-writeable:') and not can_be_writeable:
             # For testing how future writeable caps would behave in read-only contexts.
             kind = "x-tahoe-future-test-writeable: testing cap"
-        elif s.startswith('x-tahoe-future-test-mutable:') and not can_be_mutable:
+        elif s.startswith(b'x-tahoe-future-test-mutable:') and not can_be_mutable:
             # For testing how future mutable readcaps would behave in immutable contexts.
             kind = "x-tahoe-future-test-mutable: testing cap"
         else:
@@ -829,18 +851,22 @@ def is_uri(s):
         return False
 
 def is_literal_file_uri(s):
-    if not isinstance(s, str):
+    if isinstance(s, unicode):
+        s = s.encode("utf-8")
+    if not isinstance(s, bytes):
         return False
-    return (s.startswith('URI:LIT:') or
+    return (s.startswith(b'URI:LIT:') or
-            s.startswith(ALLEGED_READONLY_PREFIX + 'URI:LIT:') or
+            s.startswith(ALLEGED_READONLY_PREFIX + b'URI:LIT:') or
-            s.startswith(ALLEGED_IMMUTABLE_PREFIX + 'URI:LIT:'))
+            s.startswith(ALLEGED_IMMUTABLE_PREFIX + b'URI:LIT:'))
 
 def has_uri_prefix(s):
-    if not isinstance(s, str):
+    if isinstance(s, unicode):
+        s = s.encode("utf-8")
+    if not isinstance(s, bytes):
         return False
-    return (s.startswith("URI:") or
+    return (s.startswith(b"URI:") or
-            s.startswith(ALLEGED_READONLY_PREFIX + 'URI:') or
+            s.startswith(ALLEGED_READONLY_PREFIX + b'URI:') or
-            s.startswith(ALLEGED_IMMUTABLE_PREFIX + 'URI:'))
+            s.startswith(ALLEGED_IMMUTABLE_PREFIX + b'URI:'))
 
 
 # These take the same keyword arguments as from_string above.
@@ -850,26 +876,26 @@ def from_string_dirnode(s, **kwargs):
     _assert(IDirnodeURI.providedBy(u))
     return u
 
-registerAdapter(from_string_dirnode, str, IDirnodeURI)
+registerAdapter(from_string_dirnode, bytes, IDirnodeURI)
 
 def from_string_filenode(s, **kwargs):
     u = from_string(s, **kwargs)
     _assert(IFileURI.providedBy(u))
     return u
 
-registerAdapter(from_string_filenode, str, IFileURI)
+registerAdapter(from_string_filenode, bytes, IFileURI)
 
 def from_string_mutable_filenode(s, **kwargs):
     u = from_string(s, **kwargs)
     _assert(IMutableFileURI.providedBy(u))
     return u
-registerAdapter(from_string_mutable_filenode, str, IMutableFileURI)
+registerAdapter(from_string_mutable_filenode, bytes, IMutableFileURI)
 
 def from_string_verifier(s, **kwargs):
     u = from_string(s, **kwargs)
     _assert(IVerifierURI.providedBy(u))
     return u
-registerAdapter(from_string_verifier, str, IVerifierURI)
+registerAdapter(from_string_verifier, bytes, IVerifierURI)
 
 
 def pack_extension(data):
@@ -877,34 +903,36 @@ def pack_extension(data):
     for k in sorted(data.keys()):
         value = data[k]
         if isinstance(value, (int, long)):
-            value = "%d" % value
+            value = b"%d" % value
-        assert isinstance(value, str), k
+        if isinstance(k, unicode):
-        assert re.match(r'^[a-zA-Z_\-]+$', k)
+            k = k.encode("utf-8")
-        pieces.append(k + ':' + hashutil.netstring(value))
+        assert isinstance(value, bytes), k
-    uri_extension = ''.join(pieces)
+        assert re.match(br'^[a-zA-Z_\-]+$', k)
+        pieces.append(k + b':' + hashutil.netstring(value))
+    uri_extension = b''.join(pieces)
     return uri_extension
 
 def unpack_extension(data):
     d = {}
     while data:
-        colon = data.index(':')
+        colon = data.index(b':')
         key = data[:colon]
         data = data[colon+1:]
 
-        colon = data.index(':')
+        colon = data.index(b':')
         number = data[:colon]
         length = int(number)
         data = data[colon+1:]
 
         value = data[:length]
-        assert data[length] == ','
+        assert data[length:length+1] == b','
         data = data[length+1:]
 
         d[key] = value
 
     # convert certain things to numbers
-    for intkey in ('size', 'segment_size', 'num_segments',
+    for intkey in (b'size', b'segment_size', b'num_segments',
-                   'needed_shares', 'total_shares'):
+                   b'needed_shares', b'total_shares'):
         if intkey in d:
             d[intkey] = int(d[intkey])
     return d
@@ -912,9 +940,9 @@ def unpack_extension(data):
 
 def unpack_extension_readable(data):
     unpacked = unpack_extension(data)
-    unpacked["UEB_hash"] = hashutil.uri_extension_hash(data)
+    unpacked[b"UEB_hash"] = hashutil.uri_extension_hash(data)
     for k in sorted(unpacked.keys()):
-        if 'hash' in k:
+        if b'hash' in k:
             unpacked[k] = base32.b2a(unpacked[k])
     return unpacked
 

src/allmydata/util/_python3.py

@@ -20,10 +20,11 @@ from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
-    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
+    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 # Keep these sorted alphabetically, to reduce merge conflicts:
 PORTED_MODULES = [
+    "allmydata.codec",
     "allmydata.crypto",
     "allmydata.crypto.aes",
     "allmydata.crypto.ed25519",
@@ -32,13 +33,19 @@ PORTED_MODULES = [
     "allmydata.crypto.util",
     "allmydata.hashtree",
     "allmydata.immutable.happiness_upload",
+    "allmydata.interfaces",
+    "allmydata.monitor",
     "allmydata.storage.crawler",
+    "allmydata.storage.expirer",
     "allmydata.test.common_py3",
+    "allmydata.uri",
     "allmydata.util._python3",
     "allmydata.util.abbreviate",
     "allmydata.util.assertutil",
     "allmydata.util.base32",
     "allmydata.util.base62",
+    "allmydata.util.configutil",
+    "allmydata.util.connection_status",
     "allmydata.util.deferredutil",
     "allmydata.util.fileutil",
     "allmydata.util.dictutil",
@@ -64,6 +71,9 @@ PORTED_TEST_MODULES = [
     "allmydata.test.test_abbreviate",
     "allmydata.test.test_base32",
     "allmydata.test.test_base62",
+    "allmydata.test.test_codec",
+    "allmydata.test.test_configutil",
+    "allmydata.test.test_connection_status",
     "allmydata.test.test_crawler",
     "allmydata.test.test_crypto",
     "allmydata.test.test_deferredutil",
@@ -75,13 +85,17 @@ PORTED_TEST_MODULES = [
     "allmydata.test.test_humanreadable",
     "allmydata.test.test_iputil",
     "allmydata.test.test_log",
+    "allmydata.test.test_monitor",
     "allmydata.test.test_netstring",
     "allmydata.test.test_observer",
     "allmydata.test.test_pipeline",
     "allmydata.test.test_python3",
     "allmydata.test.test_spans",
     "allmydata.test.test_statistics",
+    "allmydata.test.test_storage",
+    "allmydata.test.test_storage_web",
     "allmydata.test.test_time_format",
+    "allmydata.test.test_uri",
     "allmydata.test.test_util",
     "allmydata.test.test_version",
 ]

src/allmydata/util/configutil.py

@@ -1,8 +1,32 @@
+"""
+Read/write config files.
 
-from ConfigParser import SafeConfigParser
+Configuration is returned as native strings.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    # We don't do open(), because we want files to read/write native strs when
+    # we do "r" or "w".
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
+
+if PY2:
+    # In theory on Python 2 configparser also works, but then code gets the
+    # wrong exceptions and they don't get handled. So just use native parser
+    # for now.
+    from ConfigParser import SafeConfigParser
+else:
+    from configparser import SafeConfigParser
 
 import attr
 
+
 class UnknownConfigError(Exception):
     """
     An unknown config item was found.
@@ -12,11 +36,16 @@ class UnknownConfigError(Exception):
 
 
 def get_config(tahoe_cfg):
+    """Load the config, returning a SafeConfigParser.
+
+    Configuration is returned as native strings.
+    """
     config = SafeConfigParser()
-    with open(tahoe_cfg, "rb") as f:
+    with open(tahoe_cfg, "r") as f:
-        # Skip any initial Byte Order Mark. Since this is an ordinary file, we
+        # On Python 2, where we read in bytes, skip any initial Byte Order
-        # don't need to handle incomplete reads, and can assume seekability.
+        # Mark. Since this is an ordinary file, we don't need to handle
-        if f.read(3) != '\xEF\xBB\xBF':
+        # incomplete reads, and can assume seekability.
+        if PY2 and f.read(3) != b'\xEF\xBB\xBF':
             f.seek(0)
         config.readfp(f)
     return config
@@ -28,7 +57,7 @@ def set_config(config, section, option, value):
     assert config.get(section, option) == value
 
 def write_config(tahoe_cfg, config):
-    with open(tahoe_cfg, "wb") as f:
+    with open(tahoe_cfg, "w") as f:
         config.write(f)
 
 def validate_config(fname, cfg, valid_config):

src/allmydata/util/connection_status.py

@@ -1,3 +1,18 @@
+"""
+Parse connection status from Foolscap.
+
+Ported to Python 3.
+"""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
+
 import time
 from zope.interface import implementer
 from ..interfaces import IConnectionStatus
@@ -37,9 +52,12 @@ def _hint_statuses(which, handlers, statuses):
 
 def from_foolscap_reconnector(rc, last_received):
     ri = rc.getReconnectionInfo()
-    # See foolscap/reconnector.py, ReconnectionInfo, for details about
+    # See foolscap/reconnector.py, ReconnectionInfo, for details about possible
-    # possible states.
+    # states. The returned result is a native string, it seems, so convert to
+    # unicode.
     state = ri.state
+    if isinstance(state, bytes):  # Python 2
+        state = str(state, "ascii")
     if state == "unstarted":
         return ConnectionStatus.unstarted()
 

src/allmydata/web/_nevow_106.py

@@ -1,31 +0,0 @@
-"""
-Implement a work-around for <https://github.com/twisted/nevow/issues/106>.
-"""
-
-from __future__ import (
-    print_function,
-    unicode_literals,
-    absolute_import,
-    division,
-)
-
-from nevow import inevow
-from twisted.internet import defer
-
-def renderHTTP(self, ctx):
-    request = inevow.IRequest(ctx)
-    if self.real_prepath_len is not None:
-        request.postpath = request.prepath + request.postpath
-        request.prepath = request.postpath[:self.real_prepath_len]
-        del request.postpath[:self.real_prepath_len]
-    result = defer.maybeDeferred(self.original.render, request).addCallback(
-        self._handle_NOT_DONE_YET, request)
-    return result
-
-
-def patch():
-    """
-    Monkey-patch the proposed fix into place.
-    """
-    from nevow.appserver import OldResourceAdapter
-    OldResourceAdapter.renderHTTP = renderHTTP

src/allmydata/web/common.py

@@ -15,11 +15,15 @@ from allmydata.interfaces import ExistingChildError, NoSuchChildError, \
      EmptyPathnameComponentError, MustBeDeepImmutableError, \
      MustBeReadonlyError, MustNotBeUnknownRWError, SDMF_VERSION, MDMF_VERSION
 from allmydata.mutable.common import UnrecoverableFileError
-from allmydata.util import abbreviate
 from allmydata.util.hashutil import timing_safe_compare
 from allmydata.util.time_format import format_time, format_delta
 from allmydata.util.encodingutil import to_bytes, quote_output
 
+# Originally part of this module, so still part of its API:
+from .common_py3 import (  # noqa: F401
+    get_arg, abbreviate_time, MultiFormatResource, WebError
+)
+
 
 def get_filenode_metadata(filenode):
     metadata = {'mutable': filenode.is_mutable()}
@@ -104,24 +108,6 @@ def get_root(ctx_or_req):
     link = "/".join([".."] * depth)
     return link
 
-def get_arg(ctx_or_req, argname, default=None, multiple=False):
-    """Extract an argument from either the query args (req.args) or the form
-    body fields (req.fields). If multiple=False, this returns a single value
-    (or the default, which defaults to None), and the query args take
-    precedence. If multiple=True, this returns a tuple of arguments (possibly
-    empty), starting with all those in the query args.
-    """
-    req = IRequest(ctx_or_req)
-    results = []
-    if argname in req.args:
-        results.extend(req.args[argname])
-    if req.fields and argname in req.fields:
-        results.append(req.fields[argname].value)
-    if multiple:
-        return tuple(results)
-    if results:
-        return results[0]
-    return default
 
 def convert_children_json(nodemaker, children_json):
     """I convert the JSON output of GET?t=json into the dict-of-nodes input
@@ -141,20 +127,6 @@ def convert_children_json(nodemaker, children_json):
             children[namex] = (childnode, metadata)
     return children
 
-def abbreviate_time(data):
-    # 1.23s, 790ms, 132us
-    if data is None:
-        return ""
-    s = float(data)
-    if s >= 10:
-        return abbreviate.abbreviate_time(data)
-    if s >= 1.0:
-        return "%.2fs" % s
-    if s >= 0.01:
-        return "%.0fms" % (1000*s)
-    if s >= 0.001:
-        return "%.1fms" % (1000*s)
-    return "%.0fus" % (1000000*s)
 
 def compute_rate(bytes, seconds):
     if bytes is None:
@@ -219,10 +191,6 @@ def render_time(t):
 def render_time_attr(t):
     return format_time(time.localtime(t))
 
-class WebError(Exception):
-    def __init__(self, text, code=http.BAD_REQUEST):
-        self.text = text
-        self.code = code
 
 # XXX: to make UnsupportedMethod return 501 NOT_IMPLEMENTED instead of 500
 # Internal Server Error, we either need to do that ICanHandleException trick,
@@ -421,62 +389,6 @@ class MultiFormatPage(Page):
             return lambda ctx: renderer(IRequest(ctx))
 
 
-class MultiFormatResource(resource.Resource, object):
-    """
-    ``MultiFormatResource`` is a ``resource.Resource`` that can be rendered in
-    a number of different formats.
-
-    Rendered format is controlled by a query argument (given by
-    ``self.formatArgument``).  Different resources may support different
-    formats but ``json`` is a pretty common one.  ``html`` is the default
-    format if nothing else is given as the ``formatDefault``.
-    """
-    formatArgument = "t"
-    formatDefault = None
-
-    def render(self, req):
-        """
-        Dispatch to a renderer for a particular format, as selected by a query
-        argument.
-
-        A renderer for the format given by the query argument matching
-        ``formatArgument`` will be selected and invoked.  render_HTML will be
-        used as a default if no format is selected (either by query arguments
-        or by ``formatDefault``).
-
-        :return: The result of the selected renderer.
-        """
-        t = get_arg(req, self.formatArgument, self.formatDefault)
-        renderer = self._get_renderer(t)
-        return renderer(req)
-
-    def _get_renderer(self, fmt):
-        """
-        Get the renderer for the indicated format.
-
-        :param str fmt: The format.  If a method with a prefix of ``render_``
-            and a suffix of this format (upper-cased) is found, it will be
-            used.
-
-        :return: A callable which takes a twisted.web Request and renders a
-            response.
-        """
-        renderer = None
-
-        if fmt is not None:
-            try:
-                renderer = getattr(self, "render_{}".format(fmt.upper()))
-            except AttributeError:
-                raise WebError(
-                    "Unknown {} value: {!r}".format(self.formatArgument, fmt),
-                )
-
-        if renderer is None:
-            renderer = self.render_HTML
-
-        return renderer
-
-
 class SlotsSequenceElement(template.Element):
     """
     ``SlotsSequenceElement` is a minimal port of nevow's sequence renderer for

src/allmydata/web/common_py3.py

@@ -0,0 +1,120 @@
+"""
+Common utilities that are available from Python 3.
+
+Can eventually be merged back into allmydata.web.common.
+"""
+
+from future.utils import PY2
+
+if PY2:
+    from nevow.inevow import IRequest as INevowRequest
+else:
+    INevowRequest = None
+
+from twisted.web import resource, http
+from twisted.web.iweb import IRequest
+
+from allmydata.util import abbreviate
+
+
+class WebError(Exception):
+    def __init__(self, text, code=http.BAD_REQUEST):
+        self.text = text
+        self.code = code
+
+
+def get_arg(ctx_or_req, argname, default=None, multiple=False):
+    """Extract an argument from either the query args (req.args) or the form
+    body fields (req.fields). If multiple=False, this returns a single value
+    (or the default, which defaults to None), and the query args take
+    precedence. If multiple=True, this returns a tuple of arguments (possibly
+    empty), starting with all those in the query args.
+    """
+    results = []
+    if PY2:
+        req = INevowRequest(ctx_or_req)
+        if argname in req.args:
+            results.extend(req.args[argname])
+        if req.fields and argname in req.fields:
+            results.append(req.fields[argname].value)
+    else:
+        req = IRequest(ctx_or_req)
+        if argname in req.args:
+            results.extend(req.args[argname])
+    if multiple:
+        return tuple(results)
+    if results:
+        return results[0]
+    return default
+
+
+class MultiFormatResource(resource.Resource, object):
+    """
+    ``MultiFormatResource`` is a ``resource.Resource`` that can be rendered in
+    a number of different formats.
+
+    Rendered format is controlled by a query argument (given by
+    ``self.formatArgument``).  Different resources may support different
+    formats but ``json`` is a pretty common one.  ``html`` is the default
+    format if nothing else is given as the ``formatDefault``.
+    """
+    formatArgument = "t"
+    formatDefault = None
+
+    def render(self, req):
+        """
+        Dispatch to a renderer for a particular format, as selected by a query
+        argument.
+
+        A renderer for the format given by the query argument matching
+        ``formatArgument`` will be selected and invoked.  render_HTML will be
+        used as a default if no format is selected (either by query arguments
+        or by ``formatDefault``).
+
+        :return: The result of the selected renderer.
+        """
+        t = get_arg(req, self.formatArgument, self.formatDefault)
+        renderer = self._get_renderer(t)
+        return renderer(req)
+
+    def _get_renderer(self, fmt):
+        """
+        Get the renderer for the indicated format.
+
+        :param str fmt: The format.  If a method with a prefix of ``render_``
+            and a suffix of this format (upper-cased) is found, it will be
+            used.
+
+        :return: A callable which takes a twisted.web Request and renders a
+            response.
+        """
+        renderer = None
+
+        if fmt is not None:
+            try:
+                renderer = getattr(self, "render_{}".format(fmt.upper()))
+            except AttributeError:
+                raise WebError(
+                    "Unknown {} value: {!r}".format(self.formatArgument, fmt),
+                )
+
+        if renderer is None:
+            renderer = self.render_HTML
+
+        return renderer
+
+
+def abbreviate_time(data):
+    # 1.23s, 790ms, 132us
+    if data is None:
+        return ""
+    s = float(data)
+    if s >= 10:
+        return abbreviate.abbreviate_time(data)
+    if s >= 1.0:
+        return "%.2fs" % s
+    if s >= 0.01:
+        return "%.0fms" % (1000*s)
+    if s >= 0.001:
+        return "%.1fms" % (1000*s)
+    return "%.0fus" % (1000000*s)

src/allmydata/web/directory.py

@@ -53,7 +53,6 @@ from allmydata.web.common import (
     get_mutable_type,
     get_filenode_metadata,
     render_time,
-    MultiFormatPage,
     MultiFormatResource,
     SlotsSequenceElement,
 )
@@ -1213,7 +1212,7 @@ class ManifestElement(ReloadableMonitorElement):
 
 class ManifestResults(MultiFormatResource, ReloadMixin):
 
-    # Control MultiFormatPage
+    # Control MultiFormatResource
     formatArgument = "output"
     formatDefault = "html"
 
@@ -1268,8 +1267,9 @@ class ManifestResults(MultiFormatResource, ReloadMixin):
         return json.dumps(status, indent=1)
 
 
-class DeepSizeResults(MultiFormatPage):
+class DeepSizeResults(MultiFormatResource):
-    # Control MultiFormatPage
+
+    # Control MultiFormatResource
     formatArgument = "output"
     formatDefault = "html"
 

src/allmydata/web/private.py

@@ -54,11 +54,6 @@ from .logs import (
     create_log_resources,
 )
 
-# Hotfix work-around https://github.com/twisted/nevow/issues/106
-from . import _nevow_106
-_nevow_106.patch()
-del _nevow_106
-
 SCHEME = b"tahoe-lafs"
 
 class IToken(ICredentials):

src/allmydata/web/storage.py

@@ -8,7 +8,7 @@ from twisted.web.template import (
     renderer,
     renderElement
 )
-from allmydata.web.common import (
+from allmydata.web.common_py3 import (
     abbreviate_time,
     MultiFormatResource
 )

tox.ini

@@ -44,36 +44,42 @@ usedevelop = False
 # We use extras=test to get things like "mock" that are required for our unit
 # tests.
 extras = test
-commands =
-         trial {env:TAHOE_LAFS_TRIAL_ARGS:--rterrors} {posargs:allmydata}
-         tahoe --version
 
-[testenv:py36]
+setenv =
+       # Define TEST_SUITE in the environment as an aid to constructing the
+       # correct test command below.
+       !py36: TEST_SUITE = allmydata
+       py36: TEST_SUITE = allmydata.test.python3_tests
+
 commands =
-         trial {env:TAHOE_LAFS_TRIAL_ARGS:--rterrors} {posargs:allmydata.test.python3_tests}
+         # As an aid to debugging, dump all of the Python packages and their
+         # versions that are installed in the test environment.  This is
+         # particularly useful to get from CI runs - though hopefully the
+         # version pinning we do limits the variability of this output
+         pip freeze
+
+         # The tahoe script isn't sufficiently ported for this to succeed on
+         # Python 3.x yet.
+         !py36: tahoe --version
+
+         !coverage: trial {env:TAHOE_LAFS_TRIAL_ARGS:--rterrors} {posargs:{env:TEST_SUITE}}
+
+         # measuring coverage is somewhat slower than not measuring coverage
+         # so only do it on request.
+         coverage: coverage run -m twisted.trial {env:TAHOE_LAFS_TRIAL_ARGS:--rterrors --reporter=timing} {posargs:{env:TEST_SUITE}}
+         coverage: coverage combine
+         coverage: coverage xml
+
 
 [testenv:integration]
 setenv =
          COVERAGE_PROCESS_START=.coveragerc
 commands =
-	 # NOTE: 'run with "py.test --keep-tempdir -s -v integration/" to debug failures'
+         # NOTE: 'run with "py.test --keep-tempdir -s -v integration/" to debug failures'
-	 py.test --coverage -v {posargs:integration}
+         py.test --coverage -v {posargs:integration}
          coverage combine
          coverage report
 
-[testenv:coverage]
-# coverage (with --branch) takes about 65% longer to run
-commands =
-	 # As an aid to debugging, dump all of the Python packages and their
-	 # versions that are installed in the test environment.  This is
-	 # particularly useful to get from CI runs - though hopefully the
-	 # version pinning we do limits the variability of this output
-	 # somewhat.
-         pip freeze
-         tahoe --version
-         coverage run --branch -m twisted.trial {env:TAHOE_LAFS_TRIAL_ARGS:--rterrors --reporter=timing} {posargs:allmydata}
-         coverage combine
-         coverage xml
 
 [testenv:codechecks]
 # On macOS, git inside of towncrier needs $HOME.
@@ -87,11 +93,11 @@ commands =
          python misc/coding_tools/find-trailing-spaces.py -r src static misc setup.py
          python misc/coding_tools/check-miscaptures.py
 
-	 # If towncrier.check fails, you forgot to add a towncrier news
+         # If towncrier.check fails, you forgot to add a towncrier news
-	 # fragment explaining the change in this branch.  Create one at
+         # fragment explaining the change in this branch.  Create one at
-	 # `newsfragments/<ticket>.<change type>` with some text for the news
+         # `newsfragments/<ticket>.<change type>` with some text for the news
-	 # file.  See pyproject.toml for legal <change type> values.
+         # file.  See pyproject.toml for legal <change type> values.
-	 python -m towncrier.check --pyproject towncrier.pyproject.toml
+         python -m towncrier.check --pyproject towncrier.pyproject.toml
 
 [testenv:draftnews]
 passenv = TAHOE_LAFS_* PIP_* SUBUNITREPORTER_* USERPROFILE HOMEDRIVE HOMEPATH
@@ -110,9 +116,9 @@ commands =
          #
          # Some discussion is available at
          # https://github.com/pypa/pip/issues/5696
-	 #
+         #
-	 # towncrier post 19.2 (unreleased as of this writing) adds a --config
+         # towncrier post 19.2 (unreleased as of this writing) adds a --config
-	 # option that can be used instead of this file shuffling.
+         # option that can be used instead of this file shuffling.
          mv towncrier.pyproject.toml pyproject.toml
 
          # towncrier 19.2 + works with python2.7
@@ -138,9 +144,9 @@ commands =
          #
          # Some discussion is available at
          # https://github.com/pypa/pip/issues/5696
-	 #
+         #
-	 # towncrier post 19.2 (unreleased as of this writing) adds a --config
+         # towncrier post 19.2 (unreleased as of this writing) adds a --config
-	 # option that can be used instead of this file shuffling.
+         # option that can be used instead of this file shuffling.
          mv towncrier.pyproject.toml pyproject.toml
 
          # towncrier 19.2 + works with python2.7