radicale_plugins/radicale/web.py

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2018-04-10 17:57:45 +00:00
# This file is part of Radicale Server - Calendar Server
# Copyright (C) 2017 Unrud <unrud@openaliasbox.org>
#
# 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/>.
import os
import posixpath
import time
from http import client
from importlib import import_module
import pkg_resources
from . import storage
NOT_FOUND = (
client.NOT_FOUND, (("Content-Type", "text/plain"),),
"The requested resource could not be found.")
MIMETYPES = {
".css": "text/css",
".eot": "application/vnd.ms-fontobject",
".gif": "image/gif",
".html": "text/html",
".js": "application/javascript",
".manifest": "text/cache-manifest",
".png": "image/png",
".svg": "image/svg+xml",
".ttf": "application/font-sfnt",
".txt": "text/plain",
".woff": "application/font-woff",
".woff2": "font/woff2",
".xml": "text/xml"}
FALLBACK_MIMETYPE = "application/octet-stream"
INTERNAL_TYPES = ("None", "none", "internal")
def load(configuration, logger):
"""Load the web module chosen in configuration."""
web_type = configuration.get("web", "type")
if web_type in ("None", "none"): # DEPRECATED: use "none"
web_class = NoneWeb
elif web_type == "internal":
web_class = Web
else:
try:
web_class = import_module(web_type).Web
except Exception as e:
raise RuntimeError("Failed to load web module %r: %s" %
(web_type, e)) from e
logger.info("Web type is %r", web_type)
return web_class(configuration, logger)
class BaseWeb:
def __init__(self, configuration, logger):
self.configuration = configuration
self.logger = logger
def get(self, environ, base_prefix, path, user):
"""GET request.
``base_prefix`` is sanitized and never ends with "/".
``path`` is sanitized and always starts with "/.web"
``user`` is empty for anonymous users.
"""
raise NotImplementedError
class NoneWeb(BaseWeb):
def get(self, environ, base_prefix, path, user):
if path != "/.web":
return NOT_FOUND
return client.OK, {"Content-Type": "text/plain"}, "Radicale works!"
class Web(BaseWeb):
def __init__(self, configuration, logger):
super().__init__(configuration, logger)
self.folder = pkg_resources.resource_filename(__name__, "web")
def get(self, environ, base_prefix, path, user):
try:
filesystem_path = storage.path_to_filesystem(
self.folder, path[len("/.web"):])
except ValueError as e:
self.logger.debug("Web content with unsafe path %r requested: %s",
path, e, exc_info=True)
return NOT_FOUND
if os.path.isdir(filesystem_path) and not path.endswith("/"):
location = posixpath.basename(path) + "/"
return (client.FOUND,
{"Location": location, "Content-Type": "text/plain"},
"Redirected to %s" % location)
if os.path.isdir(filesystem_path):
filesystem_path = os.path.join(filesystem_path, "index.html")
if not os.path.isfile(filesystem_path):
return NOT_FOUND
content_type = MIMETYPES.get(
os.path.splitext(filesystem_path)[1].lower(), FALLBACK_MIMETYPE)
with open(filesystem_path, "rb") as f:
answer = f.read()
last_modified = time.strftime(
"%a, %d %b %Y %H:%M:%S GMT",
time.gmtime(os.fstat(f.fileno()).st_mtime))
headers = {
"Content-Type": content_type,
"Last-Modified": last_modified}
return client.OK, headers, answer