246 lines
7.9 KiB
Python
246 lines
7.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# This file is part of Radicale Server - Calendar Server
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# Copyright © 2008-2010 Guillaume Ayoub
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# Copyright © 2008 Nicolas Kandel
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# Copyright © 2008 Pascal Halter
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Radicale. If not, see <http://www.gnu.org/licenses/>.
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"""
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XML and iCal requests manager.
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Note that all these functions need to receive unicode objects for full
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iCal requests (PUT) and string objects with charset correctly defined
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in them for XML requests (all but PUT).
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"""
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# TODO: Manage depth and calendars/collections
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import xml.etree.ElementTree as ET
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from radicale import client, config, ical
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NAMESPACES = {
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"C": "urn:ietf:params:xml:ns:caldav",
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"D": "DAV:",
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"CS": "http://calendarserver.org/ns/"}
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def _tag(short_name, local):
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"""Get XML Clark notation {uri(``short_name``)}``local``."""
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return "{%s}%s" % (NAMESPACES[short_name], local)
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def _response(code):
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"""Return full W3C names from HTTP status codes."""
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return "HTTP/1.1 %i %s" % (code, client.responses[code])
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def name_from_path(path):
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"""Return Radicale item name from ``path``."""
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path_parts = path.strip("/").split("/")
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return path_parts[-1] if len(path_parts) > 2 else None
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def delete(path, calendar):
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"""Read and answer DELETE requests.
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Read rfc4918-9.6 for info.
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"""
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# Reading request
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calendar.remove(name_from_path(path))
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# Writing answer
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multistatus = ET.Element(_tag("D", "multistatus"))
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response = ET.Element(_tag("D", "response"))
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multistatus.append(response)
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href = ET.Element(_tag("D", "href"))
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href.text = path
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response.append(href)
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status = ET.Element(_tag("D", "status"))
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status.text = _response(200)
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response.append(status)
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return ET.tostring(multistatus, config.get("encoding", "request"))
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def propfind(path, xml_request, calendar, depth, request):
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"""Read and answer PROPFIND requests.
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Read rfc4918-9.1 for info.
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"""
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# Reading request
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root = ET.fromstring(xml_request)
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prop_element = root.find(_tag("D", "prop"))
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prop_list = prop_element.getchildren()
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props = [prop.tag for prop in prop_list]
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# Writing answer
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multistatus = ET.Element(_tag("D", "multistatus"))
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if depth == "0":
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items = [calendar]
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elif depth == "1":
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items = [calendar] + calendar.events + calendar.todos
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else:
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# depth is infinity or not specified
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# we limit ourselves to depth == 1
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items = [calendar] + calendar.events + calendar.todos
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for item in items:
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is_calendar = isinstance(item, ical.Calendar)
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response = ET.Element(_tag("D", "response"))
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multistatus.append(response)
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href = ET.Element(_tag("D", "href"))
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href.text = path if is_calendar else "%s/%s" % (path, item.name)
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response.append(href)
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propstat = ET.Element(_tag("D", "propstat"))
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response.append(propstat)
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prop = ET.Element(_tag("D", "prop"))
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propstat.append(prop)
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for tag in props:
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element = ET.Element(tag)
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if tag == _tag("D", "resourcetype"):
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if is_calendar:
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tag = ET.Element(_tag("C", "calendar"))
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element.append(tag)
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tag = ET.Element(_tag("D", "collection"))
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element.append(tag)
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else:
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tag = ET.Element(_tag("C", "comp"))
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tag.set("name", element.tag)
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element.append(tag)
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elif tag == _tag("D", "owner"):
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element.text = calendar.owner
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elif tag == _tag("D", "getcontenttype"):
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element.text = "text/calendar"
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elif tag == _tag("D", "getetag"):
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element.text = item.etag
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elif tag == _tag("D", "displayname"):
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element.text = calendar.name
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elif tag == _tag("D", "supported-report-set"):
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supported_report = ET.Element(_tag("D", "supported-report"))
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report_set = ET.Element(_tag("D", "report"))
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report_set.append(ET.Element(_tag("C", "calendar-multiget")))
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supported_report.append(report_set)
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element.append(supported_report)
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elif tag == _tag("D", "principal-URL"):
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# TODO: use a real principal URL, read rfc3744-4.2 for info
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element.text = "%s://%s%s" % (
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request.server.PROTOCOL, request.headers["Host"],
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request.path)
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prop.append(element)
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status = ET.Element(_tag("D", "status"))
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status.text = _response(200)
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propstat.append(status)
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return ET.tostring(multistatus, config.get("encoding", "request"))
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def put(path, ical_request, calendar):
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"""Read PUT requests."""
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name = name_from_path(path)
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if name in (item.name for item in calendar.items):
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# PUT is modifying an existing item
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calendar.replace(name, ical_request)
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else:
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# PUT is adding a new item
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calendar.append(name, ical_request)
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def report(path, xml_request, calendar):
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"""Read and answer REPORT requests.
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Read rfc3253-3.6 for info.
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"""
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# Reading request
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root = ET.fromstring(xml_request)
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prop_element = root.find(_tag("D", "prop"))
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prop_list = prop_element.getchildren()
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props = [prop.tag for prop in prop_list]
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if root.tag == _tag("C", "calendar-multiget"):
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# Read rfc4791-7.9 for info
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hreferences = set((href_element.text for href_element
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in root.findall(_tag("D", "href"))))
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else:
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hreferences = (path,)
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# Writing answer
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multistatus = ET.Element(_tag("D", "multistatus"))
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for hreference in hreferences:
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# Check if the reference is an item or a calendar
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name = name_from_path(hreference)
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if name:
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# Reference is an item
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path = "/".join(hreference.split("/")[:-1]) + "/"
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items = (item for item in calendar.items if item.name == name)
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else:
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# Reference is a calendar
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path = hreference
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items = calendar.events + calendar.todos
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for item in items:
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response = ET.Element(_tag("D", "response"))
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multistatus.append(response)
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href = ET.Element(_tag("D", "href"))
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href.text = path + item.name
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response.append(href)
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propstat = ET.Element(_tag("D", "propstat"))
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response.append(propstat)
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prop = ET.Element(_tag("D", "prop"))
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propstat.append(prop)
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if _tag("D", "getetag") in props:
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element = ET.Element(_tag("D", "getetag"))
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element.text = item.etag
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prop.append(element)
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if _tag("C", "calendar-data") in props:
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element = ET.Element(_tag("C", "calendar-data"))
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if isinstance(item, ical.Event):
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element.text = ical.serialize(
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calendar.headers, calendar.timezones + [item])
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elif isinstance(item, ical.Todo):
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element.text = ical.serialize(
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calendar.headers, calendar.timezones + [item])
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prop.append(element)
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status = ET.Element(_tag("D", "status"))
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status.text = _response(200)
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propstat.append(status)
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return ET.tostring(multistatus, config.get("encoding", "request"))
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