# -*- coding: utf-8 -*- # # This file is part of Radicale Server - Calendar Server # Copyright © 2008-2010 Guillaume Ayoub # Copyright © 2008 Nicolas Kandel # Copyright © 2008 Pascal Halter # # This library is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with Radicale. If not, see . """ XML and iCal requests manager. Note that all these functions need to receive unicode objects for full iCal requests (PUT) and string objects with charset correctly defined in them for XML requests (all but PUT). """ # TODO: Manage depth and calendars/collections import xml.etree.ElementTree as ET from radicale import client, config, ical # TODO: This is a well-known and accepted hack for ET to avoid ET from renaming # namespaces, which is accepted in XML norm but often not in XML # readers. Is there another clean solution to force namespaces? PROTECTED_NAMESPACES = { "C": "urn:ietf:params:xml:ns:caldav", "D": "DAV:", "CS": "http://calendarserver.org/ns/"} for key, value in PROTECTED_NAMESPACES.items(): ET._namespace_map[value] = key def _tag(short_name, local): """Get XML Clark notation {uri(``short_name``)}``local``.""" return "{%s}%s" % (PROTECTED_NAMESPACES[short_name], local) def _response(code): """Return full W3C names from HTTP status codes.""" return "HTTP/1.1 %i %s" % (code, client.responses[code]) def delete(obj, calendar, url): """Read and answer DELETE requests. Read rfc4918-9.6 for info. """ # Reading request calendar.remove(obj) # Writing answer multistatus = ET.Element(_tag("D", "multistatus")) response = ET.Element(_tag("D", "response")) multistatus.append(response) href = ET.Element(_tag("D", "href")) href.text = url response.append(href) status = ET.Element(_tag("D", "status")) status.text = _response(200) response.append(status) return ET.tostring(multistatus, config.get("encoding", "request")) def propfind(xml_request, calendar, url): """Read and answer PROPFIND requests. Read rfc4918-9.1 for info. """ # Reading request root = ET.fromstring(xml_request) prop_element = root.find(_tag("D", "prop")) prop_list = prop_element.getchildren() props = [prop.tag for prop in prop_list] # Writing answer multistatus = ET.Element(_tag("D", "multistatus")) response = ET.Element(_tag("D", "response")) multistatus.append(response) href = ET.Element(_tag("D", "href")) href.text = url response.append(href) propstat = ET.Element(_tag("D", "propstat")) response.append(propstat) prop = ET.Element(_tag("D", "prop")) propstat.append(prop) if _tag("D", "resourcetype") in props: element = ET.Element(_tag("D", "resourcetype")) element.append(ET.Element(_tag("C", "calendar"))) prop.append(element) if _tag("D", "owner") in props: element = ET.Element(_tag("D", "owner")) element.text = calendar.owner prop.append(element) if _tag("D", "getcontenttype") in props: element = ET.Element(_tag("D", "getcontenttype")) element.text = "text/calendar" prop.append(element) if _tag("D", "getetag") in props: element = ET.Element(_tag("D", "getetag")) element.text = calendar.etag prop.append(element) if _tag("CS", "getctag") in props: element = ET.Element(_tag("CS", "getctag")) element.text = calendar.ctag prop.append(element) status = ET.Element(_tag("D", "status")) status.text = _response(200) propstat.append(status) return ET.tostring(multistatus, config.get("encoding", "request")) def put(ical_request, calendar, url, obj): """Read PUT requests.""" # TODO: use url to set hreference if obj: # PUT is modifying obj calendar.replace(obj, ical_request) else: # PUT is adding a new object calendar.append(ical_request) def report(xml_request, calendar, url): """Read and answer REPORT requests. Read rfc3253-3.6 for info. """ # Reading request root = ET.fromstring(xml_request) prop_element = root.find(_tag("D", "prop")) prop_list = prop_element.getchildren() props = [prop.tag for prop in prop_list] if root.tag == _tag("C", "calendar-multiget"): # Read rfc4791-7.9 for info hreferences = set([href_element.text for href_element in root.findall(_tag("D", "href"))]) else: hreferences = [url] # Writing answer multistatus = ET.Element(_tag("D", "multistatus")) # TODO: WTF, sunbird needs one response by object, # is that really what is needed? # Read rfc4791-9.[6|10] for info for hreference in hreferences: objects = calendar.events + calendar.todos if not objects: # TODO: Read rfc4791-9.[6|10] to find a right answer response = ET.Element(_tag("D", "response")) multistatus.append(response) href = ET.Element(_tag("D", "href")) href.text = url response.append(href) status = ET.Element(_tag("D", "status")) status.text = _response(204) response.append(status) for obj in objects: # TODO: Use the hreference to read data and create href.text # We assume here that hreference is url response = ET.Element(_tag("D", "response")) multistatus.append(response) href = ET.Element(_tag("D", "href")) href.text = url response.append(href) propstat = ET.Element(_tag("D", "propstat")) response.append(propstat) prop = ET.Element(_tag("D", "prop")) propstat.append(prop) if _tag("D", "getetag") in props: element = ET.Element(_tag("D", "getetag")) element.text = obj.etag prop.append(element) if _tag("C", "calendar-data") in props: element = ET.Element(_tag("C", "calendar-data")) if isinstance(obj, ical.Event): element.text = ical.serialize( calendar.headers, calendar.timezones, events=[obj]) elif isinstance(obj, ical.Todo): element.text = ical.serialize( calendar.headers, calendar.timezones, todos=[obj]) prop.append(element) status = ET.Element(_tag("D", "status")) status.text = _response(200) propstat.append(status) return ET.tostring(multistatus, config.get("encoding", "request"))