--- /dev/null
+
+import sys, os
+import os.path
+from collections import deque
+import time
+
+from twisted.internet import defer, reactor, task
+from twisted.python.failure import Failure
+from twisted.python import runtime
+from twisted.application import service
+
+from allmydata.util import fileutil
+from allmydata.interfaces import IDirectoryNode
+from allmydata.util import log
+from allmydata.util.fileutil import precondition_abspath, get_pathinfo, ConflictError
+from allmydata.util.assertutil import precondition, _assert
+from allmydata.util.deferredutil import HookMixin
+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 magicfolderdb, magicpath
+
+
+IN_EXCL_UNLINK = 0x04000000L
+
+def get_inotify_module():
+ try:
+ if sys.platform == "win32":
+ from allmydata.windows import inotify
+ elif runtime.platform.supportsINotify():
+ from twisted.internet import inotify
+ else:
+ raise NotImplementedError("filesystem notification needed for Magic Folder is not supported.\n"
+ "This currently requires Linux or Windows.")
+ return inotify
+ except (ImportError, AttributeError) as e:
+ log.msg(e)
+ if sys.platform == "win32":
+ raise NotImplementedError("filesystem notification needed for Magic Folder is not supported.\n"
+ "Windows support requires at least Vista, and has only been tested on Windows 7.")
+ raise
+
+
+def is_new_file(pathinfo, db_entry):
+ if db_entry is None:
+ return True
+
+ if not pathinfo.exists and db_entry.size is None:
+ return False
+
+ return ((pathinfo.size, pathinfo.ctime, pathinfo.mtime) !=
+ (db_entry.size, db_entry.ctime, db_entry.mtime))
+
+
+class MagicFolder(service.MultiService):
+ name = 'magic-folder'
+
+ def __init__(self, client, upload_dircap, collective_dircap, local_path_u, dbfile, umask,
+ pending_delay=1.0, clock=None):
+ precondition_abspath(local_path_u)
+
+ service.MultiService.__init__(self)
+
+ immediate = clock is not None
+ clock = clock or reactor
+ db = magicfolderdb.get_magicfolderdb(dbfile, create_version=(magicfolderdb.SCHEMA_v1, 1))
+ if db is None:
+ return Failure(Exception('ERROR: Unable to load magic folder db.'))
+
+ # for tests
+ self._client = client
+ self._db = db
+
+ upload_dirnode = self._client.create_node_from_uri(upload_dircap)
+ collective_dirnode = self._client.create_node_from_uri(collective_dircap)
+
+ self.uploader = Uploader(client, local_path_u, db, upload_dirnode, pending_delay, clock, immediate)
+ self.downloader = Downloader(client, local_path_u, db, collective_dirnode,
+ upload_dirnode.get_readonly_uri(), clock, self.uploader.is_pending, umask)
+
+ def startService(self):
+ # TODO: why is this being called more than once?
+ if self.running:
+ return defer.succeed(None)
+ print "%r.startService" % (self,)
+ service.MultiService.startService(self)
+ return self.uploader.start_monitoring()
+
+ def ready(self):
+ """ready is used to signal us to start
+ processing the upload and download items...
+ """
+ d = self.uploader.start_scanning()
+ d2 = self.downloader.start_scanning()
+ d.addCallback(lambda ign: d2)
+ return d
+
+ def finish(self):
+ print "finish"
+ d = self.uploader.stop()
+ d2 = self.downloader.stop()
+ d.addCallback(lambda ign: d2)
+ return d
+
+ def remove_service(self):
+ return service.MultiService.disownServiceParent(self)
+
+
+class QueueMixin(HookMixin):
+ def __init__(self, client, local_path_u, db, name, clock):
+ self._client = client
+ self._local_path_u = local_path_u
+ self._local_filepath = to_filepath(local_path_u)
+ self._db = db
+ self._name = name
+ self._clock = clock
+ self._hooks = {'processed': None, 'started': None}
+ self.started_d = self.set_hook('started')
+
+ if not self._local_filepath.exists():
+ raise AssertionError("The '[magic_folder] local.directory' parameter was %s "
+ "but there is no directory at that location."
+ % quote_local_unicode_path(self._local_path_u))
+ if not self._local_filepath.isdir():
+ raise AssertionError("The '[magic_folder] local.directory' parameter was %s "
+ "but the thing at that location is not a directory."
+ % quote_local_unicode_path(self._local_path_u))
+
+ self._deque = deque()
+ self._lazy_tail = defer.succeed(None)
+ self._stopped = False
+ self._turn_delay = 0
+
+ def _get_filepath(self, relpath_u):
+ self._log("_get_filepath(%r)" % (relpath_u,))
+ return extend_filepath(self._local_filepath, relpath_u.split(u"/"))
+
+ def _get_relpath(self, filepath):
+ self._log("_get_relpath(%r)" % (filepath,))
+ segments = unicode_segments_from(filepath, self._local_filepath)
+ self._log("segments = %r" % (segments,))
+ return u"/".join(segments)
+
+ def _count(self, counter_name, delta=1):
+ ctr = 'magic_folder.%s.%s' % (self._name, counter_name)
+ self._log("%s += %r" % (counter_name, delta))
+ self._client.stats_provider.count(ctr, delta)
+
+ def _logcb(self, res, msg):
+ self._log("%s: %r" % (msg, res))
+ return res
+
+ def _log(self, msg):
+ s = "Magic Folder %s %s: %s" % (quote_output(self._client.nickname), self._name, msg)
+ self._client.log(s)
+ print s
+ #open("events", "ab+").write(msg)
+
+ def _turn_deque(self):
+ self._log("_turn_deque")
+ if self._stopped:
+ self._log("stopped")
+ return
+ try:
+ item = self._deque.pop()
+ self._log("popped %r" % (item,))
+ self._count('objects_queued', -1)
+ except IndexError:
+ self._log("deque is now empty")
+ self._lazy_tail.addCallback(lambda ign: self._when_queue_is_empty())
+ else:
+ self._lazy_tail.addCallback(lambda ign: self._process(item))
+ self._lazy_tail.addBoth(self._call_hook, 'processed')
+ self._lazy_tail.addErrback(log.err)
+ self._lazy_tail.addCallback(lambda ign: task.deferLater(self._clock, self._turn_delay, self._turn_deque))
+
+
+class Uploader(QueueMixin):
+ def __init__(self, client, local_path_u, db, upload_dirnode, pending_delay, clock,
+ immediate=False):
+ QueueMixin.__init__(self, client, local_path_u, db, 'uploader', clock)
+
+ self.is_ready = False
+ self._immediate = immediate
+
+ if not IDirectoryNode.providedBy(upload_dirnode):
+ raise AssertionError("The URI in '%s' does not refer to a directory."
+ % os.path.join('private', 'magic_folder_dircap'))
+ if upload_dirnode.is_unknown() or upload_dirnode.is_readonly():
+ raise AssertionError("The URI in '%s' is not a writecap to a directory."
+ % os.path.join('private', 'magic_folder_dircap'))
+
+ self._upload_dirnode = upload_dirnode
+ self._inotify = get_inotify_module()
+ self._notifier = self._inotify.INotify()
+ self._pending = set()
+
+ if hasattr(self._notifier, 'set_pending_delay'):
+ self._notifier.set_pending_delay(pending_delay)
+
+ # TODO: what about IN_MOVE_SELF and IN_UNMOUNT?
+ #
+ self.mask = ( self._inotify.IN_CREATE
+ | self._inotify.IN_CLOSE_WRITE
+ | self._inotify.IN_MOVED_TO
+ | self._inotify.IN_MOVED_FROM
+ | self._inotify.IN_DELETE
+ | self._inotify.IN_ONLYDIR
+ | IN_EXCL_UNLINK
+ )
+ self._notifier.watch(self._local_filepath, mask=self.mask, callbacks=[self._notify],
+ recursive=True)
+
+ def start_monitoring(self):
+ self._log("start_monitoring")
+ d = defer.succeed(None)
+ d.addCallback(lambda ign: self._notifier.startReading())
+ d.addCallback(lambda ign: self._count('dirs_monitored'))
+ d.addBoth(self._call_hook, 'started')
+ return d
+
+ def stop(self):
+ self._log("stop")
+ self._notifier.stopReading()
+ self._count('dirs_monitored', -1)
+ if hasattr(self._notifier, 'wait_until_stopped'):
+ d = self._notifier.wait_until_stopped()
+ else:
+ d = defer.succeed(None)
+ d.addCallback(lambda ign: self._lazy_tail)
+ return d
+
+ def start_scanning(self):
+ self._log("start_scanning")
+ self.is_ready = True
+ self._pending = self._db.get_all_relpaths()
+ self._log("all_files %r" % (self._pending))
+ d = self._scan(u"")
+ def _add_pending(ign):
+ # This adds all of the files that were in the db but not already processed
+ # (normally because they have been deleted on disk).
+ self._log("adding %r" % (self._pending))
+ self._deque.extend(self._pending)
+ d.addCallback(_add_pending)
+ d.addCallback(lambda ign: self._turn_deque())
+ return d
+
+ def _scan(self, reldir_u):
+ self._log("scan %r" % (reldir_u,))
+ fp = self._get_filepath(reldir_u)
+ try:
+ children = listdir_filepath(fp)
+ except EnvironmentError:
+ raise Exception("WARNING: magic folder: permission denied on directory %s"
+ % quote_filepath(fp))
+ except FilenameEncodingError:
+ raise Exception("WARNING: magic folder: could not list directory %s due to a filename encoding error"
+ % quote_filepath(fp))
+
+ d = defer.succeed(None)
+ for child in children:
+ _assert(isinstance(child, unicode), child=child)
+ d.addCallback(lambda ign, child=child:
+ ("%s/%s" % (reldir_u, child) if reldir_u else child))
+ def _add_pending(relpath_u):
+ if magicpath.should_ignore_file(relpath_u):
+ return None
+
+ self._pending.add(relpath_u)
+ return relpath_u
+ d.addCallback(_add_pending)
+ # This call to _process doesn't go through the deque, and probably should.
+ d.addCallback(self._process)
+ d.addBoth(self._call_hook, 'processed')
+ d.addErrback(log.err)
+
+ return d
+
+ def is_pending(self, relpath_u):
+ return relpath_u in self._pending
+
+ def _notify(self, opaque, path, events_mask):
+ self._log("inotify event %r, %r, %r\n" % (opaque, path, ', '.join(self._inotify.humanReadableMask(events_mask))))
+ relpath_u = self._get_relpath(path)
+
+ # We filter out IN_CREATE events not associated with a directory.
+ # Acting on IN_CREATE for files could cause us to read and upload
+ # a possibly-incomplete file before the application has closed it.
+ # There should always be an IN_CLOSE_WRITE after an IN_CREATE, I think.
+ # It isn't possible to avoid watching for IN_CREATE at all, because
+ # it is the only event notified for a directory creation.
+
+ if ((events_mask & self._inotify.IN_CREATE) != 0 and
+ (events_mask & self._inotify.IN_ISDIR) == 0):
+ self._log("ignoring event for %r (creation of non-directory)\n" % (relpath_u,))
+ return
+ if relpath_u in self._pending:
+ self._log("ignoring event for %r (already pending)" % (relpath_u,))
+ return
+ if magicpath.should_ignore_file(relpath_u):
+ self._log("ignoring event for %r (ignorable path)" % (relpath_u,))
+ return
+
+ self._log("appending %r to deque" % (relpath_u,))
+ self._deque.append(relpath_u)
+ self._pending.add(relpath_u)
+ self._count('objects_queued')
+ if self.is_ready:
+ if self._immediate: # for tests
+ self._turn_deque()
+ else:
+ self._clock.callLater(0, self._turn_deque)
+
+ def _when_queue_is_empty(self):
+ return defer.succeed(None)
+
+ def _process(self, relpath_u):
+ # Uploader
+ self._log("_process(%r)" % (relpath_u,))
+ if relpath_u is None:
+ return
+ precondition(isinstance(relpath_u, unicode), relpath_u)
+ precondition(not relpath_u.endswith(u'/'), relpath_u)
+
+ d = defer.succeed(None)
+
+ def _maybe_upload(val, now=None):
+ if now is None:
+ now = time.time()
+ fp = self._get_filepath(relpath_u)
+ pathinfo = get_pathinfo(unicode_from_filepath(fp))
+
+ self._log("about to remove %r from pending set %r" %
+ (relpath_u, self._pending))
+ self._pending.remove(relpath_u)
+ encoded_path_u = magicpath.path2magic(relpath_u)
+
+ if not pathinfo.exists:
+ # FIXME merge this with the 'isfile' case.
+ self._log("notified object %s disappeared (this is normal)" % quote_filepath(fp))
+ self._count('objects_disappeared')
+
+ db_entry = self._db.get_db_entry(relpath_u)
+ if db_entry is None:
+ return None
+
+ last_downloaded_timestamp = now # is this correct?
+
+ if is_new_file(pathinfo, db_entry):
+ new_version = db_entry.version + 1
+ else:
+ self._log("Not uploading %r" % (relpath_u,))
+ self._count('objects_not_uploaded')
+ return
+
+ metadata = { 'version': new_version,
+ 'deleted': True,
+ 'last_downloaded_timestamp': last_downloaded_timestamp }
+ if db_entry.last_downloaded_uri is not None:
+ metadata['last_downloaded_uri'] = db_entry.last_downloaded_uri
+
+ empty_uploadable = Data("", self._client.convergence)
+ d2 = self._upload_dirnode.add_file(encoded_path_u, empty_uploadable,
+ metadata=metadata, overwrite=True)
+
+ def _add_db_entry(filenode):
+ filecap = filenode.get_uri()
+ last_downloaded_uri = metadata.get('last_downloaded_uri', None)
+ self._db.did_upload_version(relpath_u, new_version, filecap,
+ last_downloaded_uri, last_downloaded_timestamp,
+ pathinfo)
+ self._count('files_uploaded')
+ d2.addCallback(_add_db_entry)
+ return d2
+ elif pathinfo.islink:
+ self.warn("WARNING: cannot upload symlink %s" % quote_filepath(fp))
+ return None
+ elif pathinfo.isdir:
+ if not getattr(self._notifier, 'recursive_includes_new_subdirectories', False):
+ self._notifier.watch(fp, mask=self.mask, callbacks=[self._notify], recursive=True)
+
+ uploadable = Data("", self._client.convergence)
+ encoded_path_u += magicpath.path2magic(u"/")
+ self._log("encoded_path_u = %r" % (encoded_path_u,))
+ upload_d = self._upload_dirnode.add_file(encoded_path_u, uploadable, metadata={"version":0}, overwrite=True)
+ def _succeeded(ign):
+ self._log("created subdirectory %r" % (relpath_u,))
+ self._count('directories_created')
+ def _failed(f):
+ self._log("failed to create subdirectory %r" % (relpath_u,))
+ return f
+ upload_d.addCallbacks(_succeeded, _failed)
+ upload_d.addCallback(lambda ign: self._scan(relpath_u))
+ return upload_d
+ elif pathinfo.isfile:
+ db_entry = self._db.get_db_entry(relpath_u)
+
+ last_downloaded_timestamp = now
+
+ if db_entry is None:
+ new_version = 0
+ elif is_new_file(pathinfo, db_entry):
+ new_version = db_entry.version + 1
+ else:
+ self._log("Not uploading %r" % (relpath_u,))
+ self._count('objects_not_uploaded')
+ return None
+
+ metadata = { 'version': new_version,
+ 'last_downloaded_timestamp': last_downloaded_timestamp }
+ if db_entry is not None and db_entry.last_downloaded_uri is not None:
+ metadata['last_downloaded_uri'] = db_entry.last_downloaded_uri
+
+ uploadable = FileName(unicode_from_filepath(fp), self._client.convergence)
+ d2 = self._upload_dirnode.add_file(encoded_path_u, uploadable,
+ metadata=metadata, overwrite=True)
+
+ def _add_db_entry(filenode):
+ filecap = filenode.get_uri()
+ last_downloaded_uri = metadata.get('last_downloaded_uri', None)
+ self._db.did_upload_version(relpath_u, new_version, filecap,
+ last_downloaded_uri, last_downloaded_timestamp,
+ pathinfo)
+ self._count('files_uploaded')
+ d2.addCallback(_add_db_entry)
+ return d2
+ else:
+ self.warn("WARNING: cannot process special file %s" % quote_filepath(fp))
+ return None
+
+ d.addCallback(_maybe_upload)
+
+ def _succeeded(res):
+ self._count('objects_succeeded')
+ return res
+ def _failed(f):
+ self._count('objects_failed')
+ self._log("%s while processing %r" % (f, relpath_u))
+ return f
+ d.addCallbacks(_succeeded, _failed)
+ return d
+
+ def _get_metadata(self, encoded_path_u):
+ try:
+ d = self._upload_dirnode.get_metadata_for(encoded_path_u)
+ except KeyError:
+ return Failure()
+ return d
+
+ def _get_filenode(self, encoded_path_u):
+ try:
+ d = self._upload_dirnode.get(encoded_path_u)
+ except KeyError:
+ return Failure()
+ return d
+
+
+class WriteFileMixin(object):
+ FUDGE_SECONDS = 10.0
+
+ def _get_conflicted_filename(self, abspath_u):
+ return abspath_u + u".conflict"
+
+ def _write_downloaded_file(self, abspath_u, file_contents, is_conflict=False, now=None):
+ self._log("_write_downloaded_file(%r, <%d bytes>, is_conflict=%r, now=%r)"
+ % (abspath_u, len(file_contents), is_conflict, now))
+
+ # 1. Write a temporary file, say .foo.tmp.
+ # 2. is_conflict determines whether this is an overwrite or a conflict.
+ # 3. Set the mtime of the replacement file to be T seconds before the
+ # current local time.
+ # 4. Perform a file replacement with backup filename foo.backup,
+ # replaced file foo, and replacement file .foo.tmp. If any step of
+ # this operation fails, reclassify as a conflict and stop.
+ #
+ # Returns the path of the destination file.
+
+ precondition_abspath(abspath_u)
+ replacement_path_u = abspath_u + u".tmp" # FIXME more unique
+ backup_path_u = abspath_u + u".backup"
+ if now is None:
+ now = time.time()
+
+ # ensure parent directory exists
+ head, tail = os.path.split(abspath_u)
+
+ old_mask = os.umask(self._umask)
+ try:
+ fileutil.make_dirs(head, (~ self._umask) & 0777)
+ fileutil.write(replacement_path_u, file_contents)
+ finally:
+ os.umask(old_mask)
+
+ os.utime(replacement_path_u, (now, now - self.FUDGE_SECONDS))
+ if is_conflict:
+ print "0x00 ------------ <><> is conflict; calling _rename_conflicted_file... %r %r" % (abspath_u, replacement_path_u)
+ return self._rename_conflicted_file(abspath_u, replacement_path_u)
+ else:
+ try:
+ fileutil.replace_file(abspath_u, replacement_path_u, backup_path_u)
+ return abspath_u
+ except fileutil.ConflictError:
+ return self._rename_conflicted_file(abspath_u, replacement_path_u)
+
+ def _rename_conflicted_file(self, abspath_u, replacement_path_u):
+ self._log("_rename_conflicted_file(%r, %r)" % (abspath_u, replacement_path_u))
+
+ conflict_path_u = self._get_conflicted_filename(abspath_u)
+ print "XXX rename %r %r" % (replacement_path_u, conflict_path_u)
+ if os.path.isfile(replacement_path_u):
+ print "%r exists" % (replacement_path_u,)
+ if os.path.isfile(conflict_path_u):
+ print "%r exists" % (conflict_path_u,)
+
+ fileutil.rename_no_overwrite(replacement_path_u, conflict_path_u)
+ return conflict_path_u
+
+ def _rename_deleted_file(self, abspath_u):
+ self._log('renaming deleted file to backup: %s' % (abspath_u,))
+ try:
+ fileutil.rename_no_overwrite(abspath_u, abspath_u + u'.backup')
+ except OSError:
+ self._log("Already gone: '%s'" % (abspath_u,))
+ return abspath_u
+
+
+class Downloader(QueueMixin, WriteFileMixin):
+ REMOTE_SCAN_INTERVAL = 3 # facilitates tests
+
+ def __init__(self, client, local_path_u, db, collective_dirnode,
+ upload_readonly_dircap, clock, is_upload_pending, umask):
+ QueueMixin.__init__(self, client, local_path_u, db, 'downloader', clock)
+
+ if not IDirectoryNode.providedBy(collective_dirnode):
+ raise AssertionError("The URI in '%s' does not refer to a directory."
+ % os.path.join('private', 'collective_dircap'))
+ if collective_dirnode.is_unknown() or not collective_dirnode.is_readonly():
+ raise AssertionError("The URI in '%s' is not a readonly cap to a directory."
+ % os.path.join('private', 'collective_dircap'))
+
+ self._collective_dirnode = collective_dirnode
+ self._upload_readonly_dircap = upload_readonly_dircap
+ self._is_upload_pending = is_upload_pending
+ self._umask = umask
+
+ def start_scanning(self):
+ self._log("start_scanning")
+ files = self._db.get_all_relpaths()
+ self._log("all files %s" % files)
+
+ d = self._scan_remote_collective(scan_self=True)
+ d.addBoth(self._logcb, "after _scan_remote_collective 0")
+ self._turn_deque()
+ return d
+
+ def stop(self):
+ self._stopped = True
+ d = defer.succeed(None)
+ d.addCallback(lambda ign: self._lazy_tail)
+ return d
+
+ def _should_download(self, relpath_u, remote_version):
+ """
+ _should_download returns a bool indicating whether or not a remote object should be downloaded.
+ We check the remote metadata version against our magic-folder db version number;
+ latest version wins.
+ """
+ self._log("_should_download(%r, %r)" % (relpath_u, remote_version))
+ if magicpath.should_ignore_file(relpath_u):
+ self._log("nope")
+ return False
+ self._log("yep")
+ db_entry = self._db.get_db_entry(relpath_u)
+ if db_entry is None:
+ return True
+ self._log("version %r" % (db_entry.version,))
+ return (db_entry.version < remote_version)
+
+ def _get_local_latest(self, relpath_u):
+ """
+ _get_local_latest takes a unicode path string checks to see if this file object
+ 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.
+ """
+ if not self._get_filepath(relpath_u).exists():
+ return None
+ db_entry = self._db.get_db_entry(relpath_u)
+ return None if db_entry is None else db_entry.version
+
+ def _get_collective_latest_file(self, filename):
+ """
+ _get_collective_latest_file takes a file path pointing to a file managed by
+ magic-folder and returns a deferred that fires with the two tuple containing a
+ file node and metadata for the latest version of the file located in the
+ magic-folder collective directory.
+ """
+ collective_dirmap_d = self._collective_dirnode.list()
+ def scan_collective(result):
+ list_of_deferreds = []
+ for dir_name in result.keys():
+ # XXX make sure it's a directory
+ d = defer.succeed(None)
+ d.addCallback(lambda x, dir_name=dir_name: result[dir_name][0].get_child_and_metadata(filename))
+ list_of_deferreds.append(d)
+ deferList = defer.DeferredList(list_of_deferreds, consumeErrors=True)
+ return deferList
+ collective_dirmap_d.addCallback(scan_collective)
+ def highest_version(deferredList):
+ max_version = 0
+ metadata = None
+ node = None
+ for success, result in deferredList:
+ if success:
+ if result[1]['version'] > max_version:
+ node, metadata = result
+ max_version = result[1]['version']
+ return node, metadata
+ collective_dirmap_d.addCallback(highest_version)
+ return collective_dirmap_d
+
+ def _scan_remote_dmd(self, nickname, dirnode, scan_batch):
+ self._log("_scan_remote_dmd nickname %r" % (nickname,))
+ d = dirnode.list()
+ def scan_listing(listing_map):
+ for encoded_relpath_u in listing_map.keys():
+ relpath_u = magicpath.magic2path(encoded_relpath_u)
+ self._log("found %r" % (relpath_u,))
+
+ file_node, metadata = listing_map[encoded_relpath_u]
+ local_version = self._get_local_latest(relpath_u)
+ remote_version = metadata.get('version', None)
+ self._log("%r has local version %r, remote version %r" % (relpath_u, local_version, remote_version))
+
+ if local_version is None or remote_version is None or local_version < remote_version:
+ self._log("%r added to download queue" % (relpath_u,))
+ if scan_batch.has_key(relpath_u):
+ scan_batch[relpath_u] += [(file_node, metadata)]
+ else:
+ scan_batch[relpath_u] = [(file_node, metadata)]
+
+ d.addCallback(scan_listing)
+ d.addBoth(self._logcb, "end of _scan_remote_dmd")
+ return d
+
+ def _scan_remote_collective(self, scan_self=False):
+ self._log("_scan_remote_collective")
+ scan_batch = {} # path -> [(filenode, metadata)]
+
+ d = self._collective_dirnode.list()
+ def scan_collective(dirmap):
+ d2 = defer.succeed(None)
+ for dir_name in dirmap:
+ (dirnode, metadata) = dirmap[dir_name]
+ if scan_self or dirnode.get_readonly_uri() != self._upload_readonly_dircap:
+ d2.addCallback(lambda ign, dir_name=dir_name, dirnode=dirnode:
+ self._scan_remote_dmd(dir_name, dirnode, scan_batch))
+ def _err(f, dir_name=dir_name):
+ self._log("failed to scan DMD for client %r: %s" % (dir_name, f))
+ # XXX what should we do to make this failure more visible to users?
+ d2.addErrback(_err)
+
+ return d2
+ d.addCallback(scan_collective)
+
+ def _filter_batch_to_deque(ign):
+ self._log("deque = %r, scan_batch = %r" % (self._deque, scan_batch))
+ for relpath_u in scan_batch.keys():
+ file_node, metadata = max(scan_batch[relpath_u], key=lambda x: x[1]['version'])
+
+ if self._should_download(relpath_u, metadata['version']):
+ self._deque.append( (relpath_u, file_node, metadata) )
+ else:
+ self._log("Excluding %r" % (relpath_u,))
+ self._call_hook(None, 'processed')
+
+ self._log("deque after = %r" % (self._deque,))
+ d.addCallback(_filter_batch_to_deque)
+ return d
+
+ def _when_queue_is_empty(self):
+ d = task.deferLater(self._clock, self.REMOTE_SCAN_INTERVAL, self._scan_remote_collective)
+ d.addBoth(self._logcb, "after _scan_remote_collective 1")
+ d.addCallback(lambda ign: self._turn_deque())
+ return d
+
+ def _process(self, item, now=None):
+ # Downloader
+ self._log("_process(%r)" % (item,))
+ if now is None:
+ now = time.time()
+ (relpath_u, file_node, metadata) = item
+ fp = self._get_filepath(relpath_u)
+ abspath_u = unicode_from_filepath(fp)
+ conflict_path_u = self._get_conflicted_filename(abspath_u)
+
+ d = defer.succeed(None)
+
+ def do_update_db(written_abspath_u):
+ filecap = file_node.get_uri()
+ last_uploaded_uri = metadata.get('last_uploaded_uri', None)
+ last_downloaded_uri = filecap
+ last_downloaded_timestamp = now
+ written_pathinfo = get_pathinfo(written_abspath_u)
+
+ if not written_pathinfo.exists and not metadata.get('deleted', False):
+ raise Exception("downloaded object %s disappeared" % quote_local_unicode_path(written_abspath_u))
+
+ self._db.did_upload_version(relpath_u, metadata['version'], last_uploaded_uri,
+ last_downloaded_uri, last_downloaded_timestamp, written_pathinfo)
+ self._count('objects_downloaded')
+ def failed(f):
+ self._log("download failed: %s" % (str(f),))
+ self._count('objects_failed')
+ return f
+
+ if os.path.isfile(conflict_path_u):
+ def fail(res):
+ raise ConflictError("download failed: already conflicted: %r" % (relpath_u,))
+ d.addCallback(fail)
+ else:
+ is_conflict = False
+ db_entry = self._db.get_db_entry(relpath_u)
+ dmd_last_downloaded_uri = metadata.get('last_downloaded_uri', None)
+ dmd_last_uploaded_uri = metadata.get('last_uploaded_uri', None)
+ if db_entry:
+ if dmd_last_downloaded_uri is not None and db_entry.last_downloaded_uri is not None:
+ if dmd_last_downloaded_uri != db_entry.last_downloaded_uri:
+ is_conflict = True
+ self._count('objects_conflicted')
+ elif dmd_last_uploaded_uri is not None and dmd_last_uploaded_uri != db_entry.last_uploaded_uri:
+ is_conflict = True
+ self._count('objects_conflicted')
+ elif self._is_upload_pending(relpath_u):
+ is_conflict = True
+ self._count('objects_conflicted')
+
+ if relpath_u.endswith(u"/"):
+ if metadata.get('deleted', False):
+ self._log("rmdir(%r) ignored" % (abspath_u,))
+ else:
+ self._log("mkdir(%r)" % (abspath_u,))
+ d.addCallback(lambda ign: fileutil.make_dirs(abspath_u))
+ d.addCallback(lambda ign: abspath_u)
+ else:
+ if metadata.get('deleted', False):
+ d.addCallback(lambda ign: self._rename_deleted_file(abspath_u))
+ else:
+ d.addCallback(lambda ign: file_node.download_best_version())
+ d.addCallback(lambda contents: self._write_downloaded_file(abspath_u, contents,
+ is_conflict=is_conflict))
+
+ d.addCallbacks(do_update_db, failed)
+
+ def trap_conflicts(f):
+ f.trap(ConflictError)
+ return None
+ d.addErrback(trap_conflicts)
+ return d
projects / tahoe-lafs / tahoe-lafs.git / blobdiff