300 lines
11 KiB
Python
300 lines
11 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# This file is part of Radicale Server - Calendar Server
|
|
# Copyright © 2008-2011 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 <http://www.gnu.org/licenses/>.
|
|
|
|
"""
|
|
Radicale Server module.
|
|
|
|
This module offers a WSGI application class.
|
|
|
|
To use this module, you should take a look at the file ``radicale.py`` that
|
|
should have been included in this package.
|
|
|
|
"""
|
|
|
|
import os
|
|
import posixpath
|
|
import base64
|
|
import socket
|
|
import wsgiref.simple_server
|
|
# Manage Python2/3 different modules
|
|
# pylint: disable=F0401
|
|
try:
|
|
from http import client, server
|
|
except ImportError:
|
|
import httplib as client
|
|
import BaseHTTPServer as server
|
|
# pylint: enable=F0401
|
|
|
|
from radicale import acl, config, ical, log, xmlutils
|
|
|
|
|
|
VERSION = "git"
|
|
|
|
|
|
class HTTPServer(wsgiref.simple_server.WSGIServer, object):
|
|
"""HTTP server."""
|
|
def __init__(self, address, handler, bind_and_activate=True):
|
|
"""Create server."""
|
|
ipv6 = ":" in address[0]
|
|
|
|
if ipv6:
|
|
self.address_family = socket.AF_INET6
|
|
|
|
# Do not bind and activate, as we might change socket options
|
|
super(HTTPServer, self).__init__(address, handler, False)
|
|
|
|
if ipv6:
|
|
# Only allow IPv6 connections to the IPv6 socket
|
|
self.socket.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 1)
|
|
|
|
if bind_and_activate:
|
|
self.server_bind()
|
|
self.server_activate()
|
|
|
|
|
|
class HTTPSServer(HTTPServer):
|
|
"""HTTPS server."""
|
|
def __init__(self, address, handler):
|
|
"""Create server by wrapping HTTP socket in an SSL socket."""
|
|
# Fails with Python 2.5, import if needed
|
|
# pylint: disable=F0401
|
|
import ssl
|
|
# pylint: enable=F0401
|
|
|
|
super(HTTPSServer, self).__init__(address, handler, False)
|
|
|
|
self.socket = ssl.wrap_socket(
|
|
self.socket,
|
|
server_side=True,
|
|
certfile=config.get("server", "certificate"),
|
|
keyfile=config.get("server", "key"),
|
|
ssl_version=ssl.PROTOCOL_SSLv23)
|
|
|
|
self.server_bind()
|
|
self.server_activate()
|
|
|
|
|
|
class Application(object):
|
|
"""WSGI application managing calendars."""
|
|
def __init__(self):
|
|
"""Initialize application."""
|
|
super(Application, self).__init__()
|
|
self.acl = acl.load()
|
|
self.encoding = config.get("encoding", "request")
|
|
|
|
def decode(self, text, environ):
|
|
"""Try to magically decode ``text`` according to given ``environ``."""
|
|
# List of charsets to try
|
|
charsets = []
|
|
|
|
# First append content charset given in the request
|
|
content_type = environ.get("CONTENT_TYPE")
|
|
if content_type and "charset=" in content_type:
|
|
charsets.append(content_type.split("charset=")[1].strip())
|
|
# Then append default Radicale charset
|
|
charsets.append(self.encoding)
|
|
# Then append various fallbacks
|
|
charsets.append("utf-8")
|
|
charsets.append("iso8859-1")
|
|
|
|
# Try to decode
|
|
for charset in charsets:
|
|
try:
|
|
return text.decode(charset)
|
|
except UnicodeDecodeError:
|
|
pass
|
|
raise UnicodeDecodeError
|
|
|
|
def __call__(self, environ, start_response):
|
|
"""Manage a request."""
|
|
log.LOGGER.info("%s request at %s recieved" % (
|
|
environ["REQUEST_METHOD"], environ["PATH_INFO"]))
|
|
log.LOGGER.debug("Request headers:\n%s" % environ.items())
|
|
|
|
# Get content
|
|
content_length = int(environ.get("CONTENT_LENGTH", 0))
|
|
if content_length:
|
|
content = self.decode(
|
|
environ["wsgi.input"].read(content_length), environ)
|
|
log.LOGGER.debug("Request content:\n%s" % content)
|
|
else:
|
|
content = None
|
|
|
|
# Find calendar
|
|
attributes = posixpath.normpath(
|
|
environ["PATH_INFO"].strip("/")).split("/")
|
|
if attributes:
|
|
if attributes[-1].endswith(".ics"):
|
|
attributes.pop()
|
|
path = "/".join(attributes[:min(len(attributes), 2)])
|
|
calendar = ical.Calendar(path)
|
|
else:
|
|
calendar = None
|
|
|
|
# Get function corresponding to method
|
|
function = getattr(self, environ["REQUEST_METHOD"].lower())
|
|
|
|
# Check rights
|
|
if not calendar or not self.acl:
|
|
# No calendar or no acl, don't check rights
|
|
status, headers, answer = function(environ, calendar, content)
|
|
elif calendar.owner is None and config.getboolean("acl", "personal"):
|
|
# No owner and personal calendars, don't check rights
|
|
status, headers, answer = function(environ, calendar, content)
|
|
else:
|
|
# Ask authentication backend to check rights
|
|
log.LOGGER.info(
|
|
"Checking rights for calendar owned by %s" % calendar.owner)
|
|
authorization = environ.get("HTTP_AUTHORIZATION", None)
|
|
|
|
if authorization:
|
|
auth = authorization.lstrip("Basic").strip().encode("ascii")
|
|
user, password = self.decode(
|
|
base64.b64decode(auth), environ).split(":")
|
|
else:
|
|
user = password = None
|
|
|
|
if self.acl.has_right(calendar.owner, user, password):
|
|
log.LOGGER.info("%s allowed" % calendar.owner)
|
|
status, headers, answer = function(environ, calendar, content)
|
|
else:
|
|
log.LOGGER.info("%s refused" % calendar.owner)
|
|
status = client.UNAUTHORIZED
|
|
headers = {
|
|
"WWW-Authenticate":
|
|
"Basic realm=\"Radicale Server - Password Required\""}
|
|
answer = None
|
|
|
|
# Set content length
|
|
if answer:
|
|
log.LOGGER.debug("Response content:\n%s" % answer)
|
|
headers["Content-Length"] = "%i" % len(answer)
|
|
|
|
# Start response
|
|
status = "%i %s" % (status, client.responses.get(status, ""))
|
|
start_response(status, list(headers.items()))
|
|
|
|
# Return response content
|
|
return [answer] if answer else []
|
|
|
|
# All these functions must have the same parameters, some are useless
|
|
# pylint: disable=W0612,W0613,R0201
|
|
|
|
def get(self, environ, calendar, content):
|
|
"""Manage GET request."""
|
|
item_name = xmlutils.name_from_path(environ["PATH_INFO"], calendar)
|
|
if item_name:
|
|
# Get calendar item
|
|
item = calendar.get_item(item_name)
|
|
if item:
|
|
items = calendar.timezones
|
|
items.append(item)
|
|
answer_text = ical.serialize(
|
|
headers=calendar.headers, items=items)
|
|
etag = item.etag
|
|
else:
|
|
return client.GONE, {}, None
|
|
else:
|
|
# Get whole calendar
|
|
answer_text = calendar.text
|
|
etag = calendar.etag
|
|
|
|
headers = {
|
|
"Content-Type": "text/calendar",
|
|
"Last-Modified": calendar.last_modified,
|
|
"ETag": etag}
|
|
answer = answer_text.encode(self.encoding)
|
|
return client.OK, headers, answer
|
|
|
|
def head(self, environ, calendar, content):
|
|
"""Manage HEAD request."""
|
|
status, headers, answer = self.get(environ, calendar, content)
|
|
return status, headers, None
|
|
|
|
def delete(self, environ, calendar, content):
|
|
"""Manage DELETE request."""
|
|
item = calendar.get_item(
|
|
xmlutils.name_from_path(environ["PATH_INFO"], calendar))
|
|
if item and environ.get("HTTP_IF_MATCH", item.etag) == item.etag:
|
|
# No ETag precondition or precondition verified, delete item
|
|
answer = xmlutils.delete(environ["PATH_INFO"], calendar)
|
|
status = client.NO_CONTENT
|
|
else:
|
|
# No item or ETag precondition not verified, do not delete item
|
|
answer = None
|
|
status = client.PRECONDITION_FAILED
|
|
return status, {}, answer
|
|
|
|
def mkcalendar(self, environ, calendar, content):
|
|
"""Manage MKCALENDAR request."""
|
|
return client.CREATED, {}, None
|
|
|
|
def options(self, environ, calendar, content):
|
|
"""Manage OPTIONS request."""
|
|
headers = {
|
|
"Allow": "DELETE, HEAD, GET, MKCALENDAR, " \
|
|
"OPTIONS, PROPFIND, PROPPATCH, PUT, REPORT",
|
|
"DAV": "1, calendar-access"}
|
|
return client.OK, headers, None
|
|
|
|
def propfind(self, environ, calendar, content):
|
|
"""Manage PROPFIND request."""
|
|
headers = {
|
|
"DAV": "1, calendar-access",
|
|
"Content-Type": "text/xml"}
|
|
answer = xmlutils.propfind(
|
|
environ["PATH_INFO"], content, calendar,
|
|
environ.get("HTTP_DEPTH", "infinity"))
|
|
return client.MULTI_STATUS, headers, answer
|
|
|
|
def proppatch(self, environ, calendar, content):
|
|
"""Manage PROPPATCH request."""
|
|
xmlutils.proppatch(environ["PATH_INFO"], content, calendar)
|
|
headers = {
|
|
"DAV": "1, calendar-access",
|
|
"Content-Type": "text/xml"}
|
|
return client.MULTI_STATUS, headers, None
|
|
|
|
def put(self, environ, calendar, content):
|
|
"""Manage PUT request."""
|
|
headers = {}
|
|
item_name = xmlutils.name_from_path(environ["PATH_INFO"], calendar)
|
|
item = calendar.get_item(item_name)
|
|
if (not item and not environ.get("HTTP_IF_MATCH")) or (
|
|
item and environ.get("HTTP_IF_MATCH", item.etag) == item.etag):
|
|
# PUT allowed in 3 cases
|
|
# Case 1: No item and no ETag precondition: Add new item
|
|
# Case 2: Item and ETag precondition verified: Modify item
|
|
# Case 3: Item and no Etag precondition: Force modifying item
|
|
xmlutils.put(environ["PATH_INFO"], content, calendar)
|
|
status = client.CREATED
|
|
headers["ETag"] = calendar.get_item(item_name).etag
|
|
else:
|
|
# PUT rejected in all other cases
|
|
status = client.PRECONDITION_FAILED
|
|
return status, headers, None
|
|
|
|
def report(self, environ, calendar, content):
|
|
"""Manage REPORT request."""
|
|
answer = xmlutils.report(environ["PATH_INFO"], content, calendar)
|
|
return client.MULTI_STATUS, {}, answer
|
|
|
|
# pylint: enable=W0612,W0613,R0201
|