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cpanel-ccs
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twistedcaldav
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get.py
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## # Copyright (c) 2005-2017 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. ## """ CalDAV GET method. """ __all__ = ["http_GET"] from twisted.internet.defer import inlineCallbacks, returnValue from txweb2 import responsecode from txdav.xml import element as davxml from txweb2.dav.http import ErrorResponse from txweb2.dav.util import parentForURL from txweb2.http import HTTPError, StatusResponse from txweb2.http import Response from txweb2.http_headers import MimeType from txweb2.stream import MemoryStream from twistedcaldav.config import config from twistedcaldav.customxml import calendarserver_namespace from twistedcaldav.datafilters.hiddeninstance import HiddenInstanceFilter from twistedcaldav.datafilters.privateevents import PrivateEventFilter from twistedcaldav.ical import Component from twistedcaldav.resource import isPseudoCalendarCollectionResource, \ CalDAVResource from twistedcaldav.util import bestAcceptType @inlineCallbacks def http_GET(self, request): if self.exists(): # Special sharing request on a calendar or address book if self.isCalendarCollection() or self.isAddressBookCollection(): # Check for action=share if request.args: action = request.args.get("action", ("",)) if len(action) != 1: raise HTTPError(ErrorResponse( responsecode.BAD_REQUEST, (calendarserver_namespace, "valid-action"), "Invalid action parameter: %s" % (action,), )) action = action[0] dispatch = { "share": self.directShare, }.get(action, None) if dispatch is None: raise HTTPError(ErrorResponse( responsecode.BAD_REQUEST, (calendarserver_namespace, "supported-action"), "Action not supported: %s" % (action,), )) response = (yield dispatch(request)) returnValue(response) else: # FIXME: this should be implemented in storebridge.CalendarObject.render # Look for calendar access restriction on existing resource. parentURL = parentForURL(request.uri) parent = (yield request.locateResource(parentURL)) if isPseudoCalendarCollectionResource(parent): # Check authorization first yield self.authorize(request, (davxml.Read(),)) # Accept header handling accepted_type = bestAcceptType(request.headers.getHeader("accept"), Component.allowedTypes()) if accepted_type is None: raise HTTPError(StatusResponse(responsecode.NOT_ACCEPTABLE, "Cannot generate requested data type")) caldata = (yield self.componentForUser()) # Filter any attendee hidden instances caldata = HiddenInstanceFilter().filter(caldata) if self.accessMode: # Non DAV:owner's have limited access to the data isowner = (yield self.isOwner(request)) # Now "filter" the resource calendar data caldata = PrivateEventFilter(self.accessMode, isowner).filter(caldata) response = Response() response.stream = MemoryStream(caldata.getTextWithTimezones(includeTimezones=not config.EnableTimezonesByReference, format=accepted_type)) response.headers.setHeader("content-type", MimeType.fromString("%s; charset=utf-8" % (accepted_type,))) # Add Schedule-Tag header if property is present if self.scheduleTag: response.headers.setHeader("Schedule-Tag", self.scheduleTag) returnValue(response) # Do normal GET behavior response = (yield super(CalDAVResource, self).http_GET(request)) returnValue(response)