4 from collections import deque
7 from twisted.internet import defer, reactor, task
8 from twisted.python.failure import Failure
9 from twisted.python import runtime
10 from twisted.application import service
12 from allmydata.util import fileutil
13 from allmydata.interfaces import IDirectoryNode
14 from allmydata.util import log
15 from allmydata.util.fileutil import precondition_abspath, get_pathinfo, ConflictError
16 from allmydata.util.assertutil import precondition, _assert
17 from allmydata.util.deferredutil import HookMixin
18 from allmydata.util.encodingutil import listdir_filepath, to_filepath, \
19 extend_filepath, unicode_from_filepath, unicode_segments_from, \
20 quote_filepath, quote_local_unicode_path, quote_output, FilenameEncodingError
21 from allmydata.immutable.upload import FileName, Data
22 from allmydata import magicfolderdb, magicpath
25 IN_EXCL_UNLINK = 0x04000000L
27 def get_inotify_module():
29 if sys.platform == "win32":
30 from allmydata.windows import inotify
31 elif runtime.platform.supportsINotify():
32 from twisted.internet import inotify
34 raise NotImplementedError("filesystem notification needed for Magic Folder is not supported.\n"
35 "This currently requires Linux or Windows.")
37 except (ImportError, AttributeError) as e:
39 if sys.platform == "win32":
40 raise NotImplementedError("filesystem notification needed for Magic Folder is not supported.\n"
41 "Windows support requires at least Vista, and has only been tested on Windows 7.")
45 def is_new_file(pathinfo, db_entry):
49 if not pathinfo.exists and db_entry.size is None:
52 return ((pathinfo.size, pathinfo.ctime, pathinfo.mtime) !=
53 (db_entry.size, db_entry.ctime, db_entry.mtime))
56 class MagicFolder(service.MultiService):
59 def __init__(self, client, upload_dircap, collective_dircap, local_path_u, dbfile, umask,
60 pending_delay=1.0, clock=None):
61 precondition_abspath(local_path_u)
63 service.MultiService.__init__(self)
65 immediate = clock is not None
66 clock = clock or reactor
67 db = magicfolderdb.get_magicfolderdb(dbfile, create_version=(magicfolderdb.SCHEMA_v1, 1))
69 return Failure(Exception('ERROR: Unable to load magic folder db.'))
75 upload_dirnode = self._client.create_node_from_uri(upload_dircap)
76 collective_dirnode = self._client.create_node_from_uri(collective_dircap)
78 self.uploader = Uploader(client, local_path_u, db, upload_dirnode, pending_delay, clock, immediate)
79 self.downloader = Downloader(client, local_path_u, db, collective_dirnode,
80 upload_dirnode.get_readonly_uri(), clock, self.uploader.is_pending, umask)
82 def startService(self):
83 # TODO: why is this being called more than once?
85 return defer.succeed(None)
86 print "%r.startService" % (self,)
87 service.MultiService.startService(self)
88 return self.uploader.start_monitoring()
91 """ready is used to signal us to start
92 processing the upload and download items...
94 d = self.uploader.start_scanning()
95 d2 = self.downloader.start_scanning()
96 d.addCallback(lambda ign: d2)
101 d = self.uploader.stop()
102 d2 = self.downloader.stop()
103 d.addCallback(lambda ign: d2)
106 def remove_service(self):
107 return service.MultiService.disownServiceParent(self)
110 class QueueMixin(HookMixin):
111 def __init__(self, client, local_path_u, db, name, clock):
112 self._client = client
113 self._local_path_u = local_path_u
114 self._local_filepath = to_filepath(local_path_u)
118 self._hooks = {'processed': None, 'started': None}
119 self.started_d = self.set_hook('started')
121 if not self._local_filepath.exists():
122 raise AssertionError("The '[magic_folder] local.directory' parameter was %s "
123 "but there is no directory at that location."
124 % quote_local_unicode_path(self._local_path_u))
125 if not self._local_filepath.isdir():
126 raise AssertionError("The '[magic_folder] local.directory' parameter was %s "
127 "but the thing at that location is not a directory."
128 % quote_local_unicode_path(self._local_path_u))
130 self._deque = deque()
131 self._lazy_tail = defer.succeed(None)
132 self._stopped = False
135 def _get_filepath(self, relpath_u):
136 self._log("_get_filepath(%r)" % (relpath_u,))
137 return extend_filepath(self._local_filepath, relpath_u.split(u"/"))
139 def _get_relpath(self, filepath):
140 self._log("_get_relpath(%r)" % (filepath,))
141 segments = unicode_segments_from(filepath, self._local_filepath)
142 self._log("segments = %r" % (segments,))
143 return u"/".join(segments)
145 def _count(self, counter_name, delta=1):
146 ctr = 'magic_folder.%s.%s' % (self._name, counter_name)
147 self._log("%s += %r" % (counter_name, delta))
148 self._client.stats_provider.count(ctr, delta)
150 def _logcb(self, res, msg):
151 self._log("%s: %r" % (msg, res))
155 s = "Magic Folder %s %s: %s" % (quote_output(self._client.nickname), self._name, msg)
158 #open("events", "ab+").write(msg)
160 def _turn_deque(self):
161 self._log("_turn_deque")
166 item = self._deque.pop()
167 self._log("popped %r" % (item,))
168 self._count('objects_queued', -1)
170 self._log("deque is now empty")
171 self._lazy_tail.addCallback(lambda ign: self._when_queue_is_empty())
173 self._lazy_tail.addCallback(lambda ign: self._process(item))
174 self._lazy_tail.addBoth(self._call_hook, 'processed')
175 self._lazy_tail.addErrback(log.err)
176 self._lazy_tail.addCallback(lambda ign: task.deferLater(self._clock, self._turn_delay, self._turn_deque))
179 class Uploader(QueueMixin):
180 def __init__(self, client, local_path_u, db, upload_dirnode, pending_delay, clock,
182 QueueMixin.__init__(self, client, local_path_u, db, 'uploader', clock)
184 self.is_ready = False
185 self._immediate = immediate
187 if not IDirectoryNode.providedBy(upload_dirnode):
188 raise AssertionError("The URI in '%s' does not refer to a directory."
189 % os.path.join('private', 'magic_folder_dircap'))
190 if upload_dirnode.is_unknown() or upload_dirnode.is_readonly():
191 raise AssertionError("The URI in '%s' is not a writecap to a directory."
192 % os.path.join('private', 'magic_folder_dircap'))
194 self._upload_dirnode = upload_dirnode
195 self._inotify = get_inotify_module()
196 self._notifier = self._inotify.INotify()
197 self._pending = set()
199 if hasattr(self._notifier, 'set_pending_delay'):
200 self._notifier.set_pending_delay(pending_delay)
202 # TODO: what about IN_MOVE_SELF and IN_UNMOUNT?
204 self.mask = ( self._inotify.IN_CREATE
205 | self._inotify.IN_CLOSE_WRITE
206 | self._inotify.IN_MOVED_TO
207 | self._inotify.IN_MOVED_FROM
208 | self._inotify.IN_DELETE
209 | self._inotify.IN_ONLYDIR
212 self._notifier.watch(self._local_filepath, mask=self.mask, callbacks=[self._notify],
215 def start_monitoring(self):
216 self._log("start_monitoring")
217 d = defer.succeed(None)
218 d.addCallback(lambda ign: self._notifier.startReading())
219 d.addCallback(lambda ign: self._count('dirs_monitored'))
220 d.addBoth(self._call_hook, 'started')
225 self._notifier.stopReading()
226 self._count('dirs_monitored', -1)
227 if hasattr(self._notifier, 'wait_until_stopped'):
228 d = self._notifier.wait_until_stopped()
230 d = defer.succeed(None)
231 d.addCallback(lambda ign: self._lazy_tail)
234 def start_scanning(self):
235 self._log("start_scanning")
237 return self._full_scan()
239 def _full_scan(self):
240 self._pending = self._db.get_all_relpaths()
241 self._log("all_files %r" % (self._pending))
243 def _add_pending(ign):
244 # This adds all of the files that were in the db but not already processed
245 # (normally because they have been deleted on disk).
246 self._log("adding %r" % (self._pending))
247 self._deque.extend(self._pending)
248 d.addCallback(_add_pending)
249 d.addCallback(lambda ign: self._turn_deque())
252 def _scan(self, reldir_u):
253 self._log("scan %r" % (reldir_u,))
254 fp = self._get_filepath(reldir_u)
256 children = listdir_filepath(fp)
257 except EnvironmentError:
258 raise Exception("WARNING: magic folder: permission denied on directory %s"
259 % quote_filepath(fp))
260 except FilenameEncodingError:
261 raise Exception("WARNING: magic folder: could not list directory %s due to a filename encoding error"
262 % quote_filepath(fp))
264 d = defer.succeed(None)
265 for child in children:
266 _assert(isinstance(child, unicode), child=child)
267 d.addCallback(lambda ign, child=child:
268 ("%s/%s" % (reldir_u, child) if reldir_u else child))
269 def _add_pending(relpath_u):
270 if magicpath.should_ignore_file(relpath_u):
273 self._pending.add(relpath_u)
275 d.addCallback(_add_pending)
276 # This call to _process doesn't go through the deque, and probably should.
277 d.addCallback(self._process)
278 d.addBoth(self._call_hook, 'processed')
279 d.addErrback(log.err)
283 def is_pending(self, relpath_u):
284 return relpath_u in self._pending
286 def _notify(self, opaque, path, events_mask):
287 self._log("inotify event %r, %r, %r\n" % (opaque, path, ', '.join(self._inotify.humanReadableMask(events_mask))))
288 relpath_u = self._get_relpath(path)
290 # We filter out IN_CREATE events not associated with a directory.
291 # Acting on IN_CREATE for files could cause us to read and upload
292 # a possibly-incomplete file before the application has closed it.
293 # There should always be an IN_CLOSE_WRITE after an IN_CREATE, I think.
294 # It isn't possible to avoid watching for IN_CREATE at all, because
295 # it is the only event notified for a directory creation.
297 if ((events_mask & self._inotify.IN_CREATE) != 0 and
298 (events_mask & self._inotify.IN_ISDIR) == 0):
299 self._log("ignoring event for %r (creation of non-directory)\n" % (relpath_u,))
301 if relpath_u in self._pending:
302 self._log("ignoring event for %r (already pending)" % (relpath_u,))
304 if magicpath.should_ignore_file(relpath_u):
305 self._log("ignoring event for %r (ignorable path)" % (relpath_u,))
308 self._log("appending %r to deque" % (relpath_u,))
309 self._deque.append(relpath_u)
310 self._pending.add(relpath_u)
311 self._count('objects_queued')
313 if self._immediate: # for tests
316 self._clock.callLater(0, self._turn_deque)
318 def _when_queue_is_empty(self):
319 return defer.succeed(None)
321 def _process(self, relpath_u):
323 self._log("_process(%r)" % (relpath_u,))
324 if relpath_u is None:
326 precondition(isinstance(relpath_u, unicode), relpath_u)
327 precondition(not relpath_u.endswith(u'/'), relpath_u)
329 d = defer.succeed(None)
331 def _maybe_upload(val, now=None):
334 fp = self._get_filepath(relpath_u)
335 pathinfo = get_pathinfo(unicode_from_filepath(fp))
337 self._log("about to remove %r from pending set %r" %
338 (relpath_u, self._pending))
339 self._pending.remove(relpath_u)
340 encoded_path_u = magicpath.path2magic(relpath_u)
342 if not pathinfo.exists:
343 # FIXME merge this with the 'isfile' case.
344 self._log("notified object %s disappeared (this is normal)" % quote_filepath(fp))
345 self._count('objects_disappeared')
347 db_entry = self._db.get_db_entry(relpath_u)
351 last_downloaded_timestamp = now # is this correct?
353 if is_new_file(pathinfo, db_entry):
354 new_version = db_entry.version + 1
356 self._log("Not uploading %r" % (relpath_u,))
357 self._count('objects_not_uploaded')
360 metadata = { 'version': new_version,
362 'last_downloaded_timestamp': last_downloaded_timestamp }
363 if db_entry.last_downloaded_uri is not None:
364 metadata['last_downloaded_uri'] = db_entry.last_downloaded_uri
366 empty_uploadable = Data("", self._client.convergence)
367 d2 = self._upload_dirnode.add_file(encoded_path_u, empty_uploadable,
368 metadata=metadata, overwrite=True)
370 def _add_db_entry(filenode):
371 filecap = filenode.get_uri()
372 last_downloaded_uri = metadata.get('last_downloaded_uri', None)
373 self._db.did_upload_version(relpath_u, new_version, filecap,
374 last_downloaded_uri, last_downloaded_timestamp,
376 self._count('files_uploaded')
377 d2.addCallback(_add_db_entry)
379 elif pathinfo.islink:
380 self.warn("WARNING: cannot upload symlink %s" % quote_filepath(fp))
383 if not getattr(self._notifier, 'recursive_includes_new_subdirectories', False):
384 self._notifier.watch(fp, mask=self.mask, callbacks=[self._notify], recursive=True)
386 uploadable = Data("", self._client.convergence)
387 encoded_path_u += magicpath.path2magic(u"/")
388 self._log("encoded_path_u = %r" % (encoded_path_u,))
389 upload_d = self._upload_dirnode.add_file(encoded_path_u, uploadable, metadata={"version":0}, overwrite=True)
391 self._log("created subdirectory %r" % (relpath_u,))
392 self._count('directories_created')
394 self._log("failed to create subdirectory %r" % (relpath_u,))
396 upload_d.addCallbacks(_succeeded, _failed)
397 upload_d.addCallback(lambda ign: self._scan(relpath_u))
399 elif pathinfo.isfile:
400 db_entry = self._db.get_db_entry(relpath_u)
402 last_downloaded_timestamp = now
406 elif is_new_file(pathinfo, db_entry):
407 new_version = db_entry.version + 1
409 self._log("Not uploading %r" % (relpath_u,))
410 self._count('objects_not_uploaded')
413 metadata = { 'version': new_version,
414 'last_downloaded_timestamp': last_downloaded_timestamp }
415 if db_entry is not None and db_entry.last_downloaded_uri is not None:
416 metadata['last_downloaded_uri'] = db_entry.last_downloaded_uri
418 uploadable = FileName(unicode_from_filepath(fp), self._client.convergence)
419 d2 = self._upload_dirnode.add_file(encoded_path_u, uploadable,
420 metadata=metadata, overwrite=True)
422 def _add_db_entry(filenode):
423 filecap = filenode.get_uri()
424 last_downloaded_uri = metadata.get('last_downloaded_uri', None)
425 self._db.did_upload_version(relpath_u, new_version, filecap,
426 last_downloaded_uri, last_downloaded_timestamp,
428 self._count('files_uploaded')
429 d2.addCallback(_add_db_entry)
432 self.warn("WARNING: cannot process special file %s" % quote_filepath(fp))
435 d.addCallback(_maybe_upload)
438 self._count('objects_succeeded')
441 self._count('objects_failed')
442 self._log("%s while processing %r" % (f, relpath_u))
444 d.addCallbacks(_succeeded, _failed)
447 def _get_metadata(self, encoded_path_u):
449 d = self._upload_dirnode.get_metadata_for(encoded_path_u)
454 def _get_filenode(self, encoded_path_u):
456 d = self._upload_dirnode.get(encoded_path_u)
462 class WriteFileMixin(object):
465 def _get_conflicted_filename(self, abspath_u):
466 return abspath_u + u".conflict"
468 def _write_downloaded_file(self, abspath_u, file_contents, is_conflict=False, now=None):
469 self._log("_write_downloaded_file(%r, <%d bytes>, is_conflict=%r, now=%r)"
470 % (abspath_u, len(file_contents), is_conflict, now))
472 # 1. Write a temporary file, say .foo.tmp.
473 # 2. is_conflict determines whether this is an overwrite or a conflict.
474 # 3. Set the mtime of the replacement file to be T seconds before the
475 # current local time.
476 # 4. Perform a file replacement with backup filename foo.backup,
477 # replaced file foo, and replacement file .foo.tmp. If any step of
478 # this operation fails, reclassify as a conflict and stop.
480 # Returns the path of the destination file.
482 precondition_abspath(abspath_u)
483 replacement_path_u = abspath_u + u".tmp" # FIXME more unique
484 backup_path_u = abspath_u + u".backup"
488 # ensure parent directory exists
489 head, tail = os.path.split(abspath_u)
491 old_mask = os.umask(self._umask)
493 fileutil.make_dirs(head, (~ self._umask) & 0777)
494 fileutil.write(replacement_path_u, file_contents)
498 os.utime(replacement_path_u, (now, now - self.FUDGE_SECONDS))
500 print "0x00 ------------ <><> is conflict; calling _rename_conflicted_file... %r %r" % (abspath_u, replacement_path_u)
501 return self._rename_conflicted_file(abspath_u, replacement_path_u)
504 fileutil.replace_file(abspath_u, replacement_path_u, backup_path_u)
506 except fileutil.ConflictError:
507 return self._rename_conflicted_file(abspath_u, replacement_path_u)
509 def _rename_conflicted_file(self, abspath_u, replacement_path_u):
510 self._log("_rename_conflicted_file(%r, %r)" % (abspath_u, replacement_path_u))
512 conflict_path_u = self._get_conflicted_filename(abspath_u)
513 print "XXX rename %r %r" % (replacement_path_u, conflict_path_u)
514 if os.path.isfile(replacement_path_u):
515 print "%r exists" % (replacement_path_u,)
516 if os.path.isfile(conflict_path_u):
517 print "%r exists" % (conflict_path_u,)
519 fileutil.rename_no_overwrite(replacement_path_u, conflict_path_u)
520 return conflict_path_u
522 def _rename_deleted_file(self, abspath_u):
523 self._log('renaming deleted file to backup: %s' % (abspath_u,))
525 fileutil.rename_no_overwrite(abspath_u, abspath_u + u'.backup')
527 self._log("Already gone: '%s'" % (abspath_u,))
531 class Downloader(QueueMixin, WriteFileMixin):
532 REMOTE_SCAN_INTERVAL = 3 # facilitates tests
534 def __init__(self, client, local_path_u, db, collective_dirnode,
535 upload_readonly_dircap, clock, is_upload_pending, umask):
536 QueueMixin.__init__(self, client, local_path_u, db, 'downloader', clock)
538 if not IDirectoryNode.providedBy(collective_dirnode):
539 raise AssertionError("The URI in '%s' does not refer to a directory."
540 % os.path.join('private', 'collective_dircap'))
541 if collective_dirnode.is_unknown() or not collective_dirnode.is_readonly():
542 raise AssertionError("The URI in '%s' is not a readonly cap to a directory."
543 % os.path.join('private', 'collective_dircap'))
545 self._collective_dirnode = collective_dirnode
546 self._upload_readonly_dircap = upload_readonly_dircap
547 self._is_upload_pending = is_upload_pending
550 def start_scanning(self):
551 self._log("start_scanning")
552 files = self._db.get_all_relpaths()
553 self._log("all files %s" % files)
555 d = self._scan_remote_collective(scan_self=True)
556 d.addBoth(self._logcb, "after _scan_remote_collective 0")
562 d = defer.succeed(None)
563 d.addCallback(lambda ign: self._lazy_tail)
566 def _should_download(self, relpath_u, remote_version):
568 _should_download returns a bool indicating whether or not a remote object should be downloaded.
569 We check the remote metadata version against our magic-folder db version number;
572 self._log("_should_download(%r, %r)" % (relpath_u, remote_version))
573 if magicpath.should_ignore_file(relpath_u):
577 db_entry = self._db.get_db_entry(relpath_u)
580 self._log("version %r" % (db_entry.version,))
581 return (db_entry.version < remote_version)
583 def _get_local_latest(self, relpath_u):
585 _get_local_latest takes a unicode path string checks to see if this file object
586 exists in our magic-folder db; if not then return None
587 else check for an entry in our magic-folder db and return the version number.
589 if not self._get_filepath(relpath_u).exists():
591 db_entry = self._db.get_db_entry(relpath_u)
592 return None if db_entry is None else db_entry.version
594 def _get_collective_latest_file(self, filename):
596 _get_collective_latest_file takes a file path pointing to a file managed by
597 magic-folder and returns a deferred that fires with the two tuple containing a
598 file node and metadata for the latest version of the file located in the
599 magic-folder collective directory.
601 collective_dirmap_d = self._collective_dirnode.list()
602 def scan_collective(result):
603 list_of_deferreds = []
604 for dir_name in result.keys():
605 # XXX make sure it's a directory
606 d = defer.succeed(None)
607 d.addCallback(lambda x, dir_name=dir_name: result[dir_name][0].get_child_and_metadata(filename))
608 list_of_deferreds.append(d)
609 deferList = defer.DeferredList(list_of_deferreds, consumeErrors=True)
611 collective_dirmap_d.addCallback(scan_collective)
612 def highest_version(deferredList):
616 for success, result in deferredList:
618 if result[1]['version'] > max_version:
619 node, metadata = result
620 max_version = result[1]['version']
621 return node, metadata
622 collective_dirmap_d.addCallback(highest_version)
623 return collective_dirmap_d
625 def _scan_remote_dmd(self, nickname, dirnode, scan_batch):
626 self._log("_scan_remote_dmd nickname %r" % (nickname,))
628 def scan_listing(listing_map):
629 for encoded_relpath_u in listing_map.keys():
630 relpath_u = magicpath.magic2path(encoded_relpath_u)
631 self._log("found %r" % (relpath_u,))
633 file_node, metadata = listing_map[encoded_relpath_u]
634 local_version = self._get_local_latest(relpath_u)
635 remote_version = metadata.get('version', None)
636 self._log("%r has local version %r, remote version %r" % (relpath_u, local_version, remote_version))
638 if local_version is None or remote_version is None or local_version < remote_version:
639 self._log("%r added to download queue" % (relpath_u,))
640 if scan_batch.has_key(relpath_u):
641 scan_batch[relpath_u] += [(file_node, metadata)]
643 scan_batch[relpath_u] = [(file_node, metadata)]
645 d.addCallback(scan_listing)
646 d.addBoth(self._logcb, "end of _scan_remote_dmd")
649 def _scan_remote_collective(self, scan_self=False):
650 self._log("_scan_remote_collective")
651 scan_batch = {} # path -> [(filenode, metadata)]
653 d = self._collective_dirnode.list()
654 def scan_collective(dirmap):
655 d2 = defer.succeed(None)
656 for dir_name in dirmap:
657 (dirnode, metadata) = dirmap[dir_name]
658 if scan_self or dirnode.get_readonly_uri() != self._upload_readonly_dircap:
659 d2.addCallback(lambda ign, dir_name=dir_name, dirnode=dirnode:
660 self._scan_remote_dmd(dir_name, dirnode, scan_batch))
661 def _err(f, dir_name=dir_name):
662 self._log("failed to scan DMD for client %r: %s" % (dir_name, f))
663 # XXX what should we do to make this failure more visible to users?
667 d.addCallback(scan_collective)
669 def _filter_batch_to_deque(ign):
670 self._log("deque = %r, scan_batch = %r" % (self._deque, scan_batch))
671 for relpath_u in scan_batch.keys():
672 file_node, metadata = max(scan_batch[relpath_u], key=lambda x: x[1]['version'])
674 if self._should_download(relpath_u, metadata['version']):
675 self._deque.append( (relpath_u, file_node, metadata) )
677 self._log("Excluding %r" % (relpath_u,))
678 self._call_hook(None, 'processed')
680 self._log("deque after = %r" % (self._deque,))
681 d.addCallback(_filter_batch_to_deque)
684 def _when_queue_is_empty(self):
685 d = task.deferLater(self._clock, self.REMOTE_SCAN_INTERVAL, self._scan_remote_collective)
686 d.addBoth(self._logcb, "after _scan_remote_collective 1")
687 d.addCallback(lambda ign: self._turn_deque())
690 def _process(self, item, now=None):
692 self._log("_process(%r)" % (item,))
695 (relpath_u, file_node, metadata) = item
696 fp = self._get_filepath(relpath_u)
697 abspath_u = unicode_from_filepath(fp)
698 conflict_path_u = self._get_conflicted_filename(abspath_u)
700 d = defer.succeed(None)
702 def do_update_db(written_abspath_u):
703 filecap = file_node.get_uri()
704 last_uploaded_uri = metadata.get('last_uploaded_uri', None)
705 last_downloaded_uri = filecap
706 last_downloaded_timestamp = now
707 written_pathinfo = get_pathinfo(written_abspath_u)
709 if not written_pathinfo.exists and not metadata.get('deleted', False):
710 raise Exception("downloaded object %s disappeared" % quote_local_unicode_path(written_abspath_u))
712 self._db.did_upload_version(relpath_u, metadata['version'], last_uploaded_uri,
713 last_downloaded_uri, last_downloaded_timestamp, written_pathinfo)
714 self._count('objects_downloaded')
716 self._log("download failed: %s" % (str(f),))
717 self._count('objects_failed')
720 if os.path.isfile(conflict_path_u):
722 raise ConflictError("download failed: already conflicted: %r" % (relpath_u,))
726 db_entry = self._db.get_db_entry(relpath_u)
727 dmd_last_downloaded_uri = metadata.get('last_downloaded_uri', None)
728 dmd_last_uploaded_uri = metadata.get('last_uploaded_uri', None)
730 if dmd_last_downloaded_uri is not None and db_entry.last_downloaded_uri is not None:
731 if dmd_last_downloaded_uri != db_entry.last_downloaded_uri:
733 self._count('objects_conflicted')
734 elif dmd_last_uploaded_uri is not None and dmd_last_uploaded_uri != db_entry.last_uploaded_uri:
736 self._count('objects_conflicted')
737 elif self._is_upload_pending(relpath_u):
739 self._count('objects_conflicted')
741 if relpath_u.endswith(u"/"):
742 if metadata.get('deleted', False):
743 self._log("rmdir(%r) ignored" % (abspath_u,))
745 self._log("mkdir(%r)" % (abspath_u,))
746 d.addCallback(lambda ign: fileutil.make_dirs(abspath_u))
747 d.addCallback(lambda ign: abspath_u)
749 if metadata.get('deleted', False):
750 d.addCallback(lambda ign: self._rename_deleted_file(abspath_u))
752 d.addCallback(lambda ign: file_node.download_best_version())
753 d.addCallback(lambda contents: self._write_downloaded_file(abspath_u, contents,
754 is_conflict=is_conflict))
756 d.addCallbacks(do_update_db, failed)
758 def trap_conflicts(f):
759 f.trap(ConflictError)
761 d.addErrback(trap_conflicts)