From: Daira Hopwood Date: Wed, 30 Sep 2015 14:52:22 +0000 (+0100) Subject: FilePath-related changes. refs ticket:2506 X-Git-Url: https://git.rkrishnan.org/pf/content/en/footer/legal.html?a=commitdiff_plain;h=2518a84c0945cc1ab7e2cf22168105b7ff57dc4b;p=tahoe-lafs%2Ftahoe-lafs.git FilePath-related changes. refs ticket:2506 Signed-off-by: Daira Hopwood --- diff --git a/src/allmydata/frontends/magic_folder.py b/src/allmydata/frontends/magic_folder.py index 1ca638e8..69c5925c 100644 --- a/src/allmydata/frontends/magic_folder.py +++ b/src/allmydata/frontends/magic_folder.py @@ -15,9 +15,9 @@ from allmydata.util import log from allmydata.util.fileutil import precondition_abspath, get_pathinfo from allmydata.util.assertutil import precondition from allmydata.util.deferredutil import HookMixin -from allmydata.util.encodingutil import listdir_unicode, to_filepath, \ - unicode_from_filepath, quote_local_unicode_path, quote_output, \ - FilenameEncodingError +from allmydata.util.encodingutil import listdir_filepath, to_filepath, \ + extend_filepath, unicode_from_filepath, unicode_segments_from, \ + quote_filepath, quote_local_unicode_path, quote_output, FilenameEncodingError from allmydata.immutable.upload import FileName, Data from allmydata import backupdb, magicpath @@ -118,12 +118,12 @@ class QueueMixin(HookMixin): self._stopped = False self._turn_delay = 0 - def _get_abspath(self, relpath_u): - return unicode_from_filepath(self._local_filepath.preauthChild(relpath_u)) + def _get_filepath(self, relpath_u): + return extend_filepath(self._local_filepath, relpath_u.split(u"/")) def _get_relpath(self, filepath): print "_get_relpath(%r)" % (filepath,) - segments = filepath.asTextMode().segmentsFrom(self._local_filepath.asTextMode()) + segments = unicode_segments_from(filepath, self._local_filepath) print "segments = %r" % (segments,) return u"/".join(segments) @@ -234,15 +234,15 @@ class Uploader(QueueMixin): def _scan(self, reldir_u): self._log("scan %r" % (reldir_u,)) - abspath_u = self._get_abspath(reldir_u) + fp = self._get_filepath(reldir_u) try: - children = listdir_unicode(abspath_u) + children = listdir_filepath(fp) except EnvironmentError: raise Exception("WARNING: magic folder: permission denied on directory %s" - % quote_local_unicode_path(abspath_u)) + % quote_filepath(fp)) except FilenameEncodingError: raise Exception("WARNING: magic folder: could not list directory %s due to a filename encoding error" - % quote_local_unicode_path(abspath_u)) + % quote_filepath(fp)) d = defer.succeed(None) for child in children: @@ -280,15 +280,15 @@ class Uploader(QueueMixin): d = defer.succeed(None) def _maybe_upload(val): - abspath_u = self._get_abspath(relpath_u) - pathinfo = get_pathinfo(abspath_u) + fp = self._get_filepath(relpath_u) + pathinfo = get_pathinfo(unicode_from_filepath(fp)) print "pending = %r, about to remove %r" % (self._pending, relpath_u) self._pending.remove(relpath_u) encoded_name_u = magicpath.path2magic(relpath_u) if not pathinfo.exists: - self._log("notified object %s disappeared (this is normal)" % quote_local_unicode_path(abspath_u)) + self._log("notified object %s disappeared (this is normal)" % quote_filepath(fp)) self._count('objects_disappeared') d2 = defer.succeed(None) if self._db.check_file_db_exists(relpath_u): @@ -314,10 +314,10 @@ class Uploader(QueueMixin): d2.addCallback(lambda x: Exception("file does not exist")) # FIXME wrong return d2 elif pathinfo.islink: - self.warn("WARNING: cannot upload symlink %s" % quote_local_unicode_path(abspath_u)) + self.warn("WARNING: cannot upload symlink %s" % quote_filepath(fp)) return None elif pathinfo.isdir: - self._notifier.watch(to_filepath(abspath_u), mask=self.mask, callbacks=[self._notify], recursive=True) + self._notifier.watch(fp, mask=self.mask, callbacks=[self._notify], recursive=True) uploadable = Data("", self._client.convergence) encoded_name_u += u"@_" upload_d = self._upload_dirnode.add_file(encoded_name_u, uploadable, metadata={"version":0}, overwrite=True) @@ -334,10 +334,10 @@ class Uploader(QueueMixin): version = self._db.get_local_file_version(relpath_u) if version is None: version = 0 - elif self._db.is_new_file_time(abspath_u, relpath_u): + elif self._db.is_new_file_time(unicode_from_filepath(fp), relpath_u): version += 1 - uploadable = FileName(abspath_u, self._client.convergence) + uploadable = FileName(unicode_from_filepath(fp), self._client.convergence) d2 = self._upload_dirnode.add_file(encoded_name_u, uploadable, metadata={"version":version}, overwrite=True) def add_db_entry(filenode): filecap = filenode.get_uri() @@ -348,7 +348,7 @@ class Uploader(QueueMixin): d2.addCallback(add_db_entry) return d2 else: - self.warn("WARNING: cannot process special file %s" % quote_local_unicode_path(abspath_u)) + self.warn("WARNING: cannot process special file %s" % quote_filepath(fp)) return None d.addCallback(_maybe_upload) @@ -426,8 +426,7 @@ class Downloader(QueueMixin): exists in our magic-folder db; if not then return None else check for an entry in our magic-folder db and return the version number. """ - abspath_u = self._get_abspath(relpath_u) - if not os.path.exists(abspath_u): + if not self._get_filepath(relpath_u).exists(): return None return self._db.get_local_file_version(relpath_u) @@ -535,7 +534,8 @@ class Downloader(QueueMixin): (relpath_u, file_node, metadata) = item d = file_node.download_best_version() def succeeded(res): - abspath_u = self._get_abspath(relpath_u) + fp = self._get_filepath(relpath_u) + abspath_u = unicode_from_filepath(fp) d2 = defer.succeed(res) d2.addCallback(lambda result: self._write_downloaded_file(abspath_u, result, is_conflict=False)) def do_update_db(written_abspath_u): diff --git a/src/allmydata/test/test_magic_folder.py b/src/allmydata/test/test_magic_folder.py index ee2e44e3..b5eab58b 100644 --- a/src/allmydata/test/test_magic_folder.py +++ b/src/allmydata/test/test_magic_folder.py @@ -1,5 +1,5 @@ -import os, sys, stat, time +import os, sys, stat from twisted.trial import unittest from twisted.internet import defer diff --git a/src/allmydata/util/encodingutil.py b/src/allmydata/util/encodingutil.py index 452cdc5b..a7a2bfef 100644 --- a/src/allmydata/util/encodingutil.py +++ b/src/allmydata/util/encodingutil.py @@ -6,7 +6,7 @@ unicode and back. import sys, os, re, locale from types import NoneType -from allmydata.util.assertutil import precondition +from allmydata.util.assertutil import precondition, _assert from twisted.python import usage from twisted.python.filepath import FilePath from allmydata.util import log @@ -253,6 +253,22 @@ def quote_local_unicode_path(path, quotemarks=True): return quote_output(path, quotemarks=quotemarks, quote_newlines=True) +def quote_filepath(path, quotemarks=True): + return quote_local_unicode_path(unicode_from_filepath(path), quotemarks=quotemarks) + +def extend_filepath(fp, segments): + # We cannot use FilePath.preauthChild, because + # * it has the security flaw described in ; + # * it may return a FilePath in the wrong mode. + + for segment in segments: + fp = fp.child(segment) + + if isinstance(fp.path, unicode) and not use_unicode_filepath: + return FilePath(fp.path.encode(filesystem_encoding)) + else: + return fp + def to_filepath(path): precondition(isinstance(path, basestring), path=path) @@ -261,15 +277,28 @@ def to_filepath(path): return FilePath(path) +def _decode(s): + precondition(isinstance(s, basestring), s=s) + + if isinstance(s, bytes): + return s.decode(filesystem_encoding) + else: + return s + def unicode_from_filepath(fp): precondition(isinstance(fp, FilePath), fp=fp) + return _decode(fp.path) - path = fp.path - if isinstance(path, bytes): - path = path.decode(filesystem_encoding) - - return path +def unicode_segments_from(base_fp, ancestor_fp): + precondition(isinstance(base_fp, FilePath), base_fp=base_fp) + precondition(isinstance(ancestor_fp, FilePath), ancestor_fp=ancestor_fp) + if hasattr(FilePath, 'asTextMode'): + return base_fp.asTextMode().segmentsFrom(ancestor_fp.asTextMode()) + else: + bpt, apt = (type(base_fp.path), type(ancestor_fp.path)) + _assert(bpt == apt, bpt=bpt, apt=apt) + return map(_decode, base_fp.segmentsFrom(ancestor_fp)) def unicode_platform(): """ @@ -317,3 +346,6 @@ def listdir_unicode(path): return os.listdir(path) else: return listdir_unicode_fallback(path) + +def listdir_filepath(fp): + return listdir_unicode(unicode_from_filepath(fp))