/
util.py
688 lines (538 loc) · 22.6 KB
/
util.py
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# -*- test-case-name: txdav.caldav.datastore.test.test_util -*-
##
# Copyright (c) 2010-2015 Apple Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##
"""
Utility logic common to multiple backend implementations.
"""
import os
from zope.interface.declarations import implements
from txdav.caldav.icalendarstore import IAttachmentStorageTransport, \
ComponentUpdateState
from twisted.python.failure import Failure
from twisted.internet.defer import inlineCallbacks, Deferred, returnValue
from twisted.internet.protocol import Protocol
from twext.python.log import Logger
from txweb2 import http_headers
from twistedcaldav.ical import InvalidICalendarDataError
from twistedcaldav.ical import Component as VComponent
from twistedcaldav import ical
from twistedcaldav.datafilters.hiddeninstance import HiddenInstanceFilter
from twistedcaldav.datafilters.privateevents import PrivateEventFilter
from twistedcaldav.ical import PERUSER_UID
from txdav.common.icommondatastore import (
InvalidObjectResourceError, NoSuchObjectResourceError,
InternalDataStoreError, HomeChildNameAlreadyExistsError
)
from txdav.base.datastore.util import normalizeUUIDOrNot
from twisted.protocols.basic import FileSender
from twisted.internet.interfaces import ITransport
from twisted.internet.interfaces import IConsumer
from twisted.internet.error import ConnectionLost
from twisted.internet.task import LoopingCall
log = Logger()
validationBypass = False
def validateCalendarComponent(calendarObject, calendar, component, inserting, migrating):
"""
Validate a calendar component for a particular calendar.
@param calendarObject: The calendar object whose component will be
replaced.
@type calendarObject: L{ICalendarObject}
@param calendar: The calendar which the L{ICalendarObject} is present in.
@type calendar: L{ICalendar}
@param component: The VComponent to be validated.
@type component: L{VComponent}
"""
if validationBypass:
return
if not isinstance(component, VComponent):
raise TypeError(type(component))
try:
if not inserting and component.resourceUID() != calendarObject.uid():
raise InvalidObjectResourceError(
"UID may not change (%s != %s)" % (
component.resourceUID(), calendarObject.uid()
)
)
except NoSuchObjectResourceError:
pass
try:
# FIXME: This is a bad way to do this test (== 'inbox'), there should be a
# Calendar-level API for it.
component.validCalendarData(validateRecurrences=migrating)
component.validCalendarForCalDAV(methodAllowed=calendar.name() == 'inbox')
if migrating:
component.validOrganizerForScheduling(doFix=True)
except InvalidICalendarDataError, e:
raise InvalidObjectResourceError(e)
@inlineCallbacks
def normalizationLookup(cuaddr, recordFunction, config):
"""
Lookup function to be passed to ical.normalizeCalendarUserAddresses.
Returns a tuple of (Full name C{unicode}, uid C{unicode}, cudtype C{str}, and
calendar user address list C{unicode}) for the given cuaddr.
recordFunction is called to retrieve the record for the cuaddr.
"""
try:
record = yield recordFunction(cuaddr)
except Exception, e:
log.debug("Lookup of %s failed: %s" % (cuaddr, e))
record = None
if record is None:
returnValue((None, None, None, None))
else:
# RFC5545 syntax does not allow backslash escaping in
# parameter values. A double-quote is thus not allowed
# in a parameter value except as the start/end delimiters.
# Single quotes are allowed, so we convert any double-quotes
# to single-quotes.
fullName = record.displayName.replace('"', "'").encode("utf-8")
cuas = set(
[cua.encode("utf-8") for cua in record.calendarUserAddresses]
)
returnValue((fullName, record.uid, record.getCUType(), cuas))
@inlineCallbacks
def dropboxIDFromCalendarObject(calendarObject):
"""
Helper to implement L{ICalendarObject.dropboxID}.
@param calendarObject: The calendar object to retrieve a dropbox ID for.
@type calendarObject: L{ICalendarObject}
"""
# Try "X-APPLE-DROPBOX" first
dropboxProperty = (yield calendarObject.component()).getFirstPropertyInAnyComponent("X-APPLE-DROPBOX")
if dropboxProperty is not None and dropboxProperty.value():
componentDropboxID = dropboxProperty.value().rstrip("/").split("/")[-1]
returnValue(componentDropboxID)
# Now look at each ATTACH property and see if it might be a dropbox item
# and if so extract the id from that
attachments = (yield calendarObject.component()).getAllPropertiesInAnyComponent(
"ATTACH",
depth=1,
)
for attachment in attachments:
# Make sure the value type is URI and http(s) and it is in a dropbox
valueType = attachment.parameterValue("VALUE", "URI")
if valueType == "URI" and attachment.value().startswith("http"):
segments = attachment.value().split("/")
try:
if segments[-3] == "dropbox":
returnValue(segments[-2])
except IndexError:
pass
# Return a "safe" version of the UID
uid = calendarObject.uid()
if uid.startswith("http://"):
uid = uid.replace("http://", "")
if uid.startswith("https://"):
uid = uid.replace("https://", "")
uid = uid.replace("/", "-")
uid = uid.replace(":", "")
uid = uid.replace(".", "")
returnValue(uid + ".dropbox")
@inlineCallbacks
def _migrateCalendar(inCalendar, outCalendar, getComponent, merge=False):
"""
Copy all calendar objects and properties in the given input calendar to the
given output calendar.
@param inCalendar: the L{ICalendar} to retrieve calendar objects from.
@param outCalendar: the L{ICalendar} to store calendar objects to.
@param getComponent: a 1-argument callable; see L{migrateHome}.
@param merge: a boolean indicating whether we should attempt to merge the
calendars together.
@return: a tuple of (ok count, bad count)
"""
ok_count = 0
bad_count = 0
outCalendar.properties().update(inCalendar.properties())
outHome = outCalendar.ownerCalendarHome()
for calendarObject in (yield inCalendar.calendarObjects()):
try:
ctype = yield calendarObject.componentType()
except Exception, e: # Don't stop for any error
log.error(" Failed to migrate calendar object: %s/%s/%s (%s)" % (
inCalendar.ownerHome().name(),
inCalendar.name(),
calendarObject.name(),
str(e)
))
bad_count += 1
continue
if ctype not in ("VEVENT", "VTODO"):
log.error("Migration skipping unsupported (%s) calendar object %r"
% (ctype, calendarObject))
continue
if merge:
mightConflict = yield outHome.hasCalendarResourceUIDSomewhereElse(
calendarObject.uid(), None, "schedule"
)
if mightConflict is not None:
log.warn(
"Not migrating object %s/%s/%s due to potential conflict" %
(outHome.uid(), outCalendar.name(), calendarObject.name())
)
continue
try:
# Must account for metadata
component = yield getComponent(calendarObject)
component.md5 = calendarObject.md5()
yield outCalendar._createCalendarObjectWithNameInternal(
calendarObject.name(),
component,
internal_state=ComponentUpdateState.RAW,
options=calendarObject.getMetadata(),
)
# Only the owner's properties are migrated, since previous releases of
# calendar server didn't have per-user properties.
outObject = yield outCalendar.calendarObjectWithName(
calendarObject.name())
if outCalendar.objectResourcesHaveProperties():
outObject.properties().update(calendarObject.properties())
if inCalendar.name() == "inbox":
# Because of 9023803, skip attachment processing within inboxes
continue
# Migrate attachments.
for attachment in (yield calendarObject.attachments()):
name = attachment.name()
ctype = attachment.contentType()
exists = yield outObject.attachmentWithName(name)
if exists is None:
newattachment = yield outObject.createAttachmentWithName(name)
transport = newattachment.store(ctype)
proto = _AttachmentMigrationProto(transport)
attachment.retrieve(proto)
yield proto.done
ok_count += 1
except InternalDataStoreError:
log.error(" InternalDataStoreError: Failed to migrate calendar object: %s/%s/%s" % (
inCalendar.ownerHome().name(),
inCalendar.name(),
calendarObject.name(),
))
bad_count += 1
except Exception, e:
log.error(" %s: Failed to migrate calendar object: %s/%s/%s" % (
str(e),
inCalendar.ownerHome().name(),
inCalendar.name(),
calendarObject.name(),
))
bad_count += 1
returnValue((ok_count, bad_count,))
# MIME helpers - mostly copied from txweb2.static
def loadMimeTypes(mimetype_locations=['/etc/mime.types']):
"""
Multiple file locations containing mime-types can be passed as a list.
The files will be sourced in that order, overriding mime-types from the
files sourced beforehand, but only if a new entry explicitly overrides
the current entry.
"""
import mimetypes
# Grab Python's built-in mimetypes dictionary.
contentTypes = mimetypes.types_map #@UndefinedVariable
# Update Python's semi-erroneous dictionary with a few of the
# usual suspects.
contentTypes.update(
{
'.conf': 'text/plain',
'.diff': 'text/plain',
'.exe': 'application/x-executable',
'.flac': 'audio/x-flac',
'.java': 'text/plain',
'.ogg': 'application/ogg',
'.oz': 'text/x-oz',
'.swf': 'application/x-shockwave-flash',
'.tgz': 'application/x-gtar',
'.wml': 'text/vnd.wap.wml',
'.xul': 'application/vnd.mozilla.xul+xml',
'.py': 'text/plain',
'.patch': 'text/plain',
}
)
# Users can override these mime-types by loading them out configuration
# files (this defaults to ['/etc/mime.types']).
for location in mimetype_locations:
if os.path.exists(location):
contentTypes.update(mimetypes.read_mime_types(location))
return contentTypes
def getType(filename, types, defaultType="application/octet-stream"):
_ignore_p, ext = os.path.splitext(filename)
ext = ext.lower()
return types.get(ext, defaultType)
class _AttachmentMigrationProto(Protocol, object):
def __init__(self, storeTransport):
self.storeTransport = storeTransport
self.done = Deferred()
def connectionMade(self):
self.storeTransport.registerProducer(self.transport, False)
def dataReceived(self, data):
self.storeTransport.write(data)
@inlineCallbacks
def connectionLost(self, reason):
try:
yield self.storeTransport.loseConnection()
except:
self.done.errback()
else:
self.done.callback(None)
@inlineCallbacks
def migrateHome(inHome, outHome, getComponent=lambda x: x.component(), merge=False):
"""
Copy all calendars and properties in the given input calendar home to the
given output calendar home.
@param inHome: the L{ICalendarHome} to retrieve calendars and properties
from.
@param outHome: the L{ICalendarHome} to store calendars and properties
into.
@param getComponent: a 1-argument callable that takes an L{ICalendarObject}
(from a calendar in C{inHome}) and returns a L{VComponent} (to store in
a calendar in outHome).
@param merge: a boolean indicating whether to raise an exception when
encountering a conflicting element of data (calendar or event), or to
attempt to merge them together.
@return: a L{Deferred} that fires with C{None} when the migration is
complete.
"""
from twistedcaldav.config import config
if not merge:
if config.RestrictCalendarsToOneComponentType:
for name in ical.allowedStoreComponents:
yield outHome.removeCalendarWithName(outHome._componentCalendarName[name])
else:
yield outHome.removeCalendarWithName("calendar")
yield outHome.removeCalendarWithName("inbox")
outHome.properties().update(inHome.properties())
inCalendars = yield inHome.calendars()
for calendar in inCalendars:
name = calendar.name()
if name == "outbox":
continue
d = outHome.createCalendarWithName(name)
if merge:
d.addErrback(lambda f: f.trap(HomeChildNameAlreadyExistsError))
yield d
outCalendar = yield outHome.calendarWithName(name)
try:
yield _migrateCalendar(calendar, outCalendar, getComponent, merge=merge)
except InternalDataStoreError:
log.error(
" Failed to migrate calendar: %s/%s" % (inHome.name(), name,)
)
# No migration for notifications, since they weren't present in earlier
# released versions of CalendarServer.
# May need to create inbox if it was not present in the original file store for some reason
inboxCalendar = yield outHome.calendarWithName("inbox")
if inboxCalendar is None:
yield outHome.createCalendarWithName("inbox")
# May need to split calendars by component type
if config.RestrictCalendarsToOneComponentType:
yield outHome.splitCalendars()
class CalendarObjectBase(object):
"""
Base logic shared between file- and sql-based L{ICalendarObject}
implementations.
"""
@inlineCallbacks
def filteredComponent(self, accessUID, asAdmin=False):
"""
Filter this calendar object's iCalendar component as it would be
perceived by a particular user, accounting for per-user iCalendar data
and private events, and return a L{Deferred} that fires with that
object.
Unlike the result of C{component()}, which contains storage-specific
iCalendar properties, this is a valid iCalendar object which could be
serialized and displayed to other iCalendar-processing software.
@param accessUID: the UID of the principal who is accessing this
component.
@type accessUID: C{str} (UTF-8 encoded)
@param asAdmin: should the given UID be treated as an administrator? If
this is C{True}, the resulting component will have an unobscured
view of private events, even if the given UID is not actually the
owner of said events. (However, per-instance overridden values will
still be seen as the given C{accessUID}.)
@return: a L{Deferred} which fires with a
L{twistedcaldav.ical.Component}.
"""
component = yield self.componentForUser(accessUID)
calendar = self.calendar()
isOwner = asAdmin or (calendar.owned() and
calendar.ownerCalendarHome().uid() == accessUID)
for data_filter in [
HiddenInstanceFilter(),
PrivateEventFilter(self.accessMode, isOwner),
]:
component = data_filter.filter(component)
returnValue(component)
class StorageTransportAddress(object):
"""
Peer / host address for L{IAttachmentStorageTransport} implementations.
@ivar attachment: the L{IAttachment} being stored.
@type attachment: L{IAttachment} provider
@ivar isHost: is this a host address or peer address?
@type isHost: C{bool}
"""
def __init__(self, attachment, isHost):
"""
Initialize with the attachment being stored.
"""
self.attachment = attachment
self.isHost = isHost
def __repr__(self):
if self.isHost:
host = " (host)"
else:
host = ""
return '<Storing Attachment: %r%s>' % (self.attachment.name(), host)
class StorageTransportBase(object):
"""
Base logic shared between file- and sql-based L{IAttachmentStorageTransport}
implementations.
"""
implements(IAttachmentStorageTransport)
contentTypes = loadMimeTypes()
def __init__(self, attachment, contentType, dispositionName):
"""
Create a storage transport with a reference to an L{IAttachment} and a
L{txweb2.http_headers.MimeType}.
"""
from twisted.internet import reactor
self._clock = reactor
self._attachment = attachment
self._contentType = contentType
self._dispositionName = dispositionName
self._producer = None
# Make sure we have some kind of content-type
if self._contentType is None:
self._contentType = http_headers.MimeType.fromString(getType(self._attachment.name(), self.contentTypes))
def resetDetails(self, contentType, dispositionName):
self._contentType = contentType
self._dispositionName = dispositionName
def write(self, data):
"""
Children must override this to actually write the data, but should
upcall this implementation to interact properly with producers.
"""
if self._producer and self._streamingProducer:
# XXX this needs to be in a callLater because otherwise
# resumeProducing will call write which will call resumeProducing
# (etc) forever.
self._clock.callLater(0, self._producer.resumeProducing)
def registerProducer(self, producer, streaming):
self._producer = producer
self._streamingProducer = streaming
def getPeer(self):
return StorageTransportAddress(self._attachment, False)
def getHost(self):
return StorageTransportAddress(self._attachment, True)
def writeSequence(self, seq):
return self.write(''.join(seq))
def stopProducing(self):
return self.loseConnection()
class AttachmentRetrievalTransport(FileSender, object):
"""
The transport for a protocol that does L{IAttachment.retrieve}.
"""
implements(ITransport)
def __init__(self, filePath):
from twisted.internet import reactor
self.filePath = filePath
self.clock = reactor
def start(self, protocol):
this = self
class Consumer(object):
implements(IConsumer)
def registerProducer(self, producer, streaming):
protocol.makeConnection(producer)
this._maybeLoopDelivery()
def write(self, data):
protocol.dataReceived(data)
def unregisterProducer(self):
this._done(protocol)
self.beginFileTransfer(self.filePath.open(), Consumer())
def _done(self, protocol):
if self._deliveryLoop:
self._deliveryLoop.stop()
protocol.connectionLost(Failure(ConnectionLost()))
def write(self, data):
raise NotImplemented("This is a read-only transport.")
def writeSequence(self, datas):
self.write("".join(datas))
def loseConnection(self):
pass
def getPeer(self):
return self
def getHost(self):
return self
_everResumedProducing = False
def resumeProducing(self):
self._everResumedProducing = True
super(AttachmentRetrievalTransport, self).resumeProducing()
_deliveryLoop = None
def _maybeLoopDelivery(self):
"""
If no consumer was registered (as inferred by the fact that
resumeProducing() wasn't called)
"""
if not self._everResumedProducing:
# Not registered as a streaming producer.
def deliverNextChunk():
super(AttachmentRetrievalTransport, self).resumeProducing()
self._deliveryLoop = LoopingCall(deliverNextChunk)
self._deliveryLoop.start(0.01, True)
def fixOneCalendarObject(component):
"""
Correct the properties which may contain a user's directory UUID within a
single calendar component, by normalizing the directory UUID.
@param component: any iCalendar component.
@type component: L{twistedcaldav.ical.Component}
@return: a 2-tuple of the number of fixes performed and the new
L{Component}
"""
fixes = 0
for calprop in component.properties():
if calprop.name() in (
"ATTENDEE", "ORGANIZER", PERUSER_UID
):
preval = calprop.value()
postval = normalizeUUIDOrNot(preval)
if preval != postval:
fixes += 1
calprop.setValue(postval)
for subc in component.subcomponents():
count, _ignore_fixsubc = fixOneCalendarObject(subc)
fixes += count
return fixes, component
@inlineCallbacks
def fixOneCalendarHome(home):
"""
Correct the case of UIDs on one L{ICalendarHome}.
@return: a L{Deferred} that fires with the number of fixes made when the
fixes are complete.
"""
fixedThisHome = 0
for calendar in (yield home.calendars()):
for calObj in (yield calendar.calendarObjects()):
try:
comp = (yield calObj.component())
fixCount, comp = fixOneCalendarObject(comp)
fixedThisHome += fixCount
if fixCount:
yield calObj._setComponentInternal(comp, internal_state=ComponentUpdateState.RAW)
except:
log.failure(
"Error while processing calendar/object {calendarName} {calendarObject}",
calendarName=calendar.name(),
calendarObject=calObj.name(),
)
returnValue(fixedThisHome)