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 self._pending = self._db.get_all_relpaths()
238 self._log("all_files %r" % (self._pending))
240 def _add_pending(ign):
241 # This adds all of the files that were in the db but not already processed
242 # (normally because they have been deleted on disk).
243 self._log("adding %r" % (self._pending))
244 self._deque.extend(self._pending)
245 d.addCallback(_add_pending)
246 d.addCallback(lambda ign: self._turn_deque())
249 def _scan(self, reldir_u):
250 self._log("scan %r" % (reldir_u,))
251 fp = self._get_filepath(reldir_u)
253 children = listdir_filepath(fp)
254 except EnvironmentError:
255 raise Exception("WARNING: magic folder: permission denied on directory %s"
256 % quote_filepath(fp))
257 except FilenameEncodingError:
258 raise Exception("WARNING: magic folder: could not list directory %s due to a filename encoding error"
259 % quote_filepath(fp))
261 d = defer.succeed(None)
262 for child in children:
263 _assert(isinstance(child, unicode), child=child)
264 d.addCallback(lambda ign, child=child:
265 ("%s/%s" % (reldir_u, child) if reldir_u else child))
266 def _add_pending(relpath_u):
267 if magicpath.should_ignore_file(relpath_u):
270 self._pending.add(relpath_u)
272 d.addCallback(_add_pending)
273 # This call to _process doesn't go through the deque, and probably should.
274 d.addCallback(self._process)
275 d.addBoth(self._call_hook, 'processed')
276 d.addErrback(log.err)
280 def is_pending(self, relpath_u):
281 return relpath_u in self._pending
283 def _notify(self, opaque, path, events_mask):
284 self._log("inotify event %r, %r, %r\n" % (opaque, path, ', '.join(self._inotify.humanReadableMask(events_mask))))
285 relpath_u = self._get_relpath(path)
287 # We filter out IN_CREATE events not associated with a directory.
288 # Acting on IN_CREATE for files could cause us to read and upload
289 # a possibly-incomplete file before the application has closed it.
290 # There should always be an IN_CLOSE_WRITE after an IN_CREATE, I think.
291 # It isn't possible to avoid watching for IN_CREATE at all, because
292 # it is the only event notified for a directory creation.
294 if ((events_mask & self._inotify.IN_CREATE) != 0 and
295 (events_mask & self._inotify.IN_ISDIR) == 0):
296 self._log("ignoring event for %r (creation of non-directory)\n" % (relpath_u,))
298 if relpath_u in self._pending:
299 self._log("ignoring event for %r (already pending)" % (relpath_u,))
301 if magicpath.should_ignore_file(relpath_u):
302 self._log("ignoring event for %r (ignorable path)" % (relpath_u,))
305 self._log("appending %r to deque" % (relpath_u,))
306 self._deque.append(relpath_u)
307 self._pending.add(relpath_u)
308 self._count('objects_queued')
310 if self._immediate: # for tests
313 self._clock.callLater(0, self._turn_deque)
315 def _when_queue_is_empty(self):
316 return defer.succeed(None)
318 def _process(self, relpath_u):
320 self._log("_process(%r)" % (relpath_u,))
321 if relpath_u is None:
323 precondition(isinstance(relpath_u, unicode), relpath_u)
324 precondition(not relpath_u.endswith(u'/'), relpath_u)
326 d = defer.succeed(None)
328 def _maybe_upload(val, now=None):
331 fp = self._get_filepath(relpath_u)
332 pathinfo = get_pathinfo(unicode_from_filepath(fp))
334 self._log("about to remove %r from pending set %r" %
335 (relpath_u, self._pending))
336 self._pending.remove(relpath_u)
337 encoded_path_u = magicpath.path2magic(relpath_u)
339 if not pathinfo.exists:
340 # FIXME merge this with the 'isfile' case.
341 self._log("notified object %s disappeared (this is normal)" % quote_filepath(fp))
342 self._count('objects_disappeared')
344 db_entry = self._db.get_db_entry(relpath_u)
348 last_downloaded_timestamp = now # is this correct?
350 if is_new_file(pathinfo, db_entry):
351 new_version = db_entry.version + 1
353 self._log("Not uploading %r" % (relpath_u,))
354 self._count('objects_not_uploaded')
357 metadata = { 'version': new_version,
359 'last_downloaded_timestamp': last_downloaded_timestamp }
360 if db_entry.last_downloaded_uri is not None:
361 metadata['last_downloaded_uri'] = db_entry.last_downloaded_uri
363 empty_uploadable = Data("", self._client.convergence)
364 d2 = self._upload_dirnode.add_file(encoded_path_u, empty_uploadable,
365 metadata=metadata, overwrite=True)
367 def _add_db_entry(filenode):
368 filecap = filenode.get_uri()
369 last_downloaded_uri = metadata.get('last_downloaded_uri', None)
370 self._db.did_upload_version(relpath_u, new_version, filecap,
371 last_downloaded_uri, last_downloaded_timestamp,
373 self._count('files_uploaded')
374 d2.addCallback(_add_db_entry)
376 elif pathinfo.islink:
377 self.warn("WARNING: cannot upload symlink %s" % quote_filepath(fp))
380 if not getattr(self._notifier, 'recursive_includes_new_subdirectories', False):
381 self._notifier.watch(fp, mask=self.mask, callbacks=[self._notify], recursive=True)
383 uploadable = Data("", self._client.convergence)
384 encoded_path_u += magicpath.path2magic(u"/")
385 self._log("encoded_path_u = %r" % (encoded_path_u,))
386 upload_d = self._upload_dirnode.add_file(encoded_path_u, uploadable, metadata={"version":0}, overwrite=True)
388 self._log("created subdirectory %r" % (relpath_u,))
389 self._count('directories_created')
391 self._log("failed to create subdirectory %r" % (relpath_u,))
393 upload_d.addCallbacks(_succeeded, _failed)
394 upload_d.addCallback(lambda ign: self._scan(relpath_u))
396 elif pathinfo.isfile:
397 db_entry = self._db.get_db_entry(relpath_u)
399 last_downloaded_timestamp = now
403 elif is_new_file(pathinfo, db_entry):
404 new_version = db_entry.version + 1
406 self._log("Not uploading %r" % (relpath_u,))
407 self._count('objects_not_uploaded')
410 metadata = { 'version': new_version,
411 'last_downloaded_timestamp': last_downloaded_timestamp }
412 if db_entry is not None and db_entry.last_downloaded_uri is not None:
413 metadata['last_downloaded_uri'] = db_entry.last_downloaded_uri
415 uploadable = FileName(unicode_from_filepath(fp), self._client.convergence)
416 d2 = self._upload_dirnode.add_file(encoded_path_u, uploadable,
417 metadata=metadata, overwrite=True)
419 def _add_db_entry(filenode):
420 filecap = filenode.get_uri()
421 last_downloaded_uri = metadata.get('last_downloaded_uri', None)
422 self._db.did_upload_version(relpath_u, new_version, filecap,
423 last_downloaded_uri, last_downloaded_timestamp,
425 self._count('files_uploaded')
426 d2.addCallback(_add_db_entry)
429 self.warn("WARNING: cannot process special file %s" % quote_filepath(fp))
432 d.addCallback(_maybe_upload)
435 self._count('objects_succeeded')
438 self._count('objects_failed')
439 self._log("%s while processing %r" % (f, relpath_u))
441 d.addCallbacks(_succeeded, _failed)
444 def _get_metadata(self, encoded_path_u):
446 d = self._upload_dirnode.get_metadata_for(encoded_path_u)
451 def _get_filenode(self, encoded_path_u):
453 d = self._upload_dirnode.get(encoded_path_u)
459 class WriteFileMixin(object):
462 def _get_conflicted_filename(self, abspath_u):
463 return abspath_u + u".conflict"
465 def _write_downloaded_file(self, abspath_u, file_contents, is_conflict=False, now=None):
466 self._log("_write_downloaded_file(%r, <%d bytes>, is_conflict=%r, now=%r)"
467 % (abspath_u, len(file_contents), is_conflict, now))
469 # 1. Write a temporary file, say .foo.tmp.
470 # 2. is_conflict determines whether this is an overwrite or a conflict.
471 # 3. Set the mtime of the replacement file to be T seconds before the
472 # current local time.
473 # 4. Perform a file replacement with backup filename foo.backup,
474 # replaced file foo, and replacement file .foo.tmp. If any step of
475 # this operation fails, reclassify as a conflict and stop.
477 # Returns the path of the destination file.
479 precondition_abspath(abspath_u)
480 replacement_path_u = abspath_u + u".tmp" # FIXME more unique
481 backup_path_u = abspath_u + u".backup"
485 # ensure parent directory exists
486 head, tail = os.path.split(abspath_u)
488 old_mask = os.umask(self._umask)
490 fileutil.make_dirs(head, (~ self._umask) & 0777)
491 fileutil.write(replacement_path_u, file_contents)
495 os.utime(replacement_path_u, (now, now - self.FUDGE_SECONDS))
497 print "0x00 ------------ <><> is conflict; calling _rename_conflicted_file... %r %r" % (abspath_u, replacement_path_u)
498 return self._rename_conflicted_file(abspath_u, replacement_path_u)
501 fileutil.replace_file(abspath_u, replacement_path_u, backup_path_u)
503 except fileutil.ConflictError:
504 return self._rename_conflicted_file(abspath_u, replacement_path_u)
506 def _rename_conflicted_file(self, abspath_u, replacement_path_u):
507 self._log("_rename_conflicted_file(%r, %r)" % (abspath_u, replacement_path_u))
509 conflict_path_u = self._get_conflicted_filename(abspath_u)
510 print "XXX rename %r %r" % (replacement_path_u, conflict_path_u)
511 if os.path.isfile(replacement_path_u):
512 print "%r exists" % (replacement_path_u,)
513 if os.path.isfile(conflict_path_u):
514 print "%r exists" % (conflict_path_u,)
516 fileutil.rename_no_overwrite(replacement_path_u, conflict_path_u)
517 return conflict_path_u
519 def _rename_deleted_file(self, abspath_u):
520 self._log('renaming deleted file to backup: %s' % (abspath_u,))
522 fileutil.rename_no_overwrite(abspath_u, abspath_u + u'.backup')
524 self._log("Already gone: '%s'" % (abspath_u,))
528 class Downloader(QueueMixin, WriteFileMixin):
529 REMOTE_SCAN_INTERVAL = 3 # facilitates tests
531 def __init__(self, client, local_path_u, db, collective_dirnode,
532 upload_readonly_dircap, clock, is_upload_pending, umask):
533 QueueMixin.__init__(self, client, local_path_u, db, 'downloader', clock)
535 if not IDirectoryNode.providedBy(collective_dirnode):
536 raise AssertionError("The URI in '%s' does not refer to a directory."
537 % os.path.join('private', 'collective_dircap'))
538 if collective_dirnode.is_unknown() or not collective_dirnode.is_readonly():
539 raise AssertionError("The URI in '%s' is not a readonly cap to a directory."
540 % os.path.join('private', 'collective_dircap'))
542 self._collective_dirnode = collective_dirnode
543 self._upload_readonly_dircap = upload_readonly_dircap
544 self._is_upload_pending = is_upload_pending
547 def start_scanning(self):
548 self._log("start_scanning")
549 files = self._db.get_all_relpaths()
550 self._log("all files %s" % files)
552 d = self._scan_remote_collective(scan_self=True)
553 d.addBoth(self._logcb, "after _scan_remote_collective 0")
559 d = defer.succeed(None)
560 d.addCallback(lambda ign: self._lazy_tail)
563 def _should_download(self, relpath_u, remote_version):
565 _should_download returns a bool indicating whether or not a remote object should be downloaded.
566 We check the remote metadata version against our magic-folder db version number;
569 self._log("_should_download(%r, %r)" % (relpath_u, remote_version))
570 if magicpath.should_ignore_file(relpath_u):
574 db_entry = self._db.get_db_entry(relpath_u)
577 self._log("version %r" % (db_entry.version,))
578 return (db_entry.version < remote_version)
580 def _get_local_latest(self, relpath_u):
582 _get_local_latest takes a unicode path string checks to see if this file object
583 exists in our magic-folder db; if not then return None
584 else check for an entry in our magic-folder db and return the version number.
586 if not self._get_filepath(relpath_u).exists():
588 db_entry = self._db.get_db_entry(relpath_u)
589 return None if db_entry is None else db_entry.version
591 def _get_collective_latest_file(self, filename):
593 _get_collective_latest_file takes a file path pointing to a file managed by
594 magic-folder and returns a deferred that fires with the two tuple containing a
595 file node and metadata for the latest version of the file located in the
596 magic-folder collective directory.
598 collective_dirmap_d = self._collective_dirnode.list()
599 def scan_collective(result):
600 list_of_deferreds = []
601 for dir_name in result.keys():
602 # XXX make sure it's a directory
603 d = defer.succeed(None)
604 d.addCallback(lambda x, dir_name=dir_name: result[dir_name][0].get_child_and_metadata(filename))
605 list_of_deferreds.append(d)
606 deferList = defer.DeferredList(list_of_deferreds, consumeErrors=True)
608 collective_dirmap_d.addCallback(scan_collective)
609 def highest_version(deferredList):
613 for success, result in deferredList:
615 if result[1]['version'] > max_version:
616 node, metadata = result
617 max_version = result[1]['version']
618 return node, metadata
619 collective_dirmap_d.addCallback(highest_version)
620 return collective_dirmap_d
622 def _scan_remote_dmd(self, nickname, dirnode, scan_batch):
623 self._log("_scan_remote_dmd nickname %r" % (nickname,))
625 def scan_listing(listing_map):
626 for encoded_relpath_u in listing_map.keys():
627 relpath_u = magicpath.magic2path(encoded_relpath_u)
628 self._log("found %r" % (relpath_u,))
630 file_node, metadata = listing_map[encoded_relpath_u]
631 local_version = self._get_local_latest(relpath_u)
632 remote_version = metadata.get('version', None)
633 self._log("%r has local version %r, remote version %r" % (relpath_u, local_version, remote_version))
635 if local_version is None or remote_version is None or local_version < remote_version:
636 self._log("%r added to download queue" % (relpath_u,))
637 if scan_batch.has_key(relpath_u):
638 scan_batch[relpath_u] += [(file_node, metadata)]
640 scan_batch[relpath_u] = [(file_node, metadata)]
642 d.addCallback(scan_listing)
643 d.addBoth(self._logcb, "end of _scan_remote_dmd")
646 def _scan_remote_collective(self, scan_self=False):
647 self._log("_scan_remote_collective")
648 scan_batch = {} # path -> [(filenode, metadata)]
650 d = self._collective_dirnode.list()
651 def scan_collective(dirmap):
652 d2 = defer.succeed(None)
653 for dir_name in dirmap:
654 (dirnode, metadata) = dirmap[dir_name]
655 if scan_self or dirnode.get_readonly_uri() != self._upload_readonly_dircap:
656 d2.addCallback(lambda ign, dir_name=dir_name, dirnode=dirnode:
657 self._scan_remote_dmd(dir_name, dirnode, scan_batch))
658 def _err(f, dir_name=dir_name):
659 self._log("failed to scan DMD for client %r: %s" % (dir_name, f))
660 # XXX what should we do to make this failure more visible to users?
664 d.addCallback(scan_collective)
666 def _filter_batch_to_deque(ign):
667 self._log("deque = %r, scan_batch = %r" % (self._deque, scan_batch))
668 for relpath_u in scan_batch.keys():
669 file_node, metadata = max(scan_batch[relpath_u], key=lambda x: x[1]['version'])
671 if self._should_download(relpath_u, metadata['version']):
672 self._deque.append( (relpath_u, file_node, metadata) )
674 self._log("Excluding %r" % (relpath_u,))
675 self._call_hook(None, 'processed')
677 self._log("deque after = %r" % (self._deque,))
678 d.addCallback(_filter_batch_to_deque)
681 def _when_queue_is_empty(self):
682 d = task.deferLater(self._clock, self.REMOTE_SCAN_INTERVAL, self._scan_remote_collective)
683 d.addBoth(self._logcb, "after _scan_remote_collective 1")
684 d.addCallback(lambda ign: self._turn_deque())
687 def _process(self, item, now=None):
689 self._log("_process(%r)" % (item,))
692 (relpath_u, file_node, metadata) = item
693 fp = self._get_filepath(relpath_u)
694 abspath_u = unicode_from_filepath(fp)
695 conflict_path_u = self._get_conflicted_filename(abspath_u)
697 d = defer.succeed(None)
699 def do_update_db(written_abspath_u):
700 filecap = file_node.get_uri()
701 last_uploaded_uri = metadata.get('last_uploaded_uri', None)
702 last_downloaded_uri = filecap
703 last_downloaded_timestamp = now
704 written_pathinfo = get_pathinfo(written_abspath_u)
706 if not written_pathinfo.exists and not metadata.get('deleted', False):
707 raise Exception("downloaded object %s disappeared" % quote_local_unicode_path(written_abspath_u))
709 self._db.did_upload_version(relpath_u, metadata['version'], last_uploaded_uri,
710 last_downloaded_uri, last_downloaded_timestamp, written_pathinfo)
711 self._count('objects_downloaded')
713 self._log("download failed: %s" % (str(f),))
714 self._count('objects_failed')
717 if os.path.isfile(conflict_path_u):
719 raise ConflictError("download failed: already conflicted: %r" % (relpath_u,))
723 db_entry = self._db.get_db_entry(relpath_u)
724 dmd_last_downloaded_uri = metadata.get('last_downloaded_uri', None)
725 dmd_last_uploaded_uri = metadata.get('last_uploaded_uri', None)
727 if dmd_last_downloaded_uri is not None and db_entry.last_downloaded_uri is not None:
728 if dmd_last_downloaded_uri != db_entry.last_downloaded_uri:
730 self._count('objects_conflicted')
731 elif dmd_last_uploaded_uri is not None and dmd_last_uploaded_uri != db_entry.last_uploaded_uri:
733 self._count('objects_conflicted')
734 elif self._is_upload_pending(relpath_u):
736 self._count('objects_conflicted')
738 if relpath_u.endswith(u"/"):
739 if metadata.get('deleted', False):
740 self._log("rmdir(%r) ignored" % (abspath_u,))
742 self._log("mkdir(%r)" % (abspath_u,))
743 d.addCallback(lambda ign: fileutil.make_dirs(abspath_u))
744 d.addCallback(lambda ign: abspath_u)
746 if metadata.get('deleted', False):
747 d.addCallback(lambda ign: self._rename_deleted_file(abspath_u))
749 d.addCallback(lambda ign: file_node.download_best_version())
750 d.addCallback(lambda contents: self._write_downloaded_file(abspath_u, contents,
751 is_conflict=is_conflict))
753 d.addCallbacks(do_update_db, failed)
755 def trap_conflicts(f):
756 f.trap(ConflictError)
758 d.addErrback(trap_conflicts)