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calibre-web/cps/tornado_wsgi.py

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# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2022 OzzieIsaacs
#
# This program 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 program 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 this program. If not, see <http://www.gnu.org/licenses/>.
from tornado.wsgi import WSGIContainer
import tornado
from tornado import escape
from tornado import httputil
from tornado.ioloop import IOLoop
from tornado.log import access_log
from typing import List, Tuple, Optional, Callable, Any, Dict, Text
from types import TracebackType
import typing
if typing.TYPE_CHECKING:
from typing import Type # noqa: F401
from wsgiref.types import WSGIApplication as WSGIAppType # noqa: F4
class MyWSGIContainer(WSGIContainer):
def __call__(self, request: httputil.HTTPServerRequest) -> None:
if tornado.version_info < (6, 3, 0, -99):
data = {} # type: Dict[str, Any]
response = [] # type: List[bytes]
def start_response(
status: str,
headers: List[Tuple[str, str]],
exc_info: Optional[
Tuple[
"Optional[Type[BaseException]]",
Optional[BaseException],
Optional[TracebackType],
]
] = None,
) -> Callable[[bytes], Any]:
data["status"] = status
data["headers"] = headers
return response.append
app_response = self.wsgi_application(
MyWSGIContainer.environ(self, request), start_response
)
try:
response.extend(app_response)
body = b"".join(response)
finally:
if hasattr(app_response, "close"):
app_response.close() # type: ignore
if not data:
raise Exception("WSGI app did not call start_response")
status_code_str, reason = data["status"].split(" ", 1)
status_code = int(status_code_str)
headers = data["headers"] # type: List[Tuple[str, str]]
header_set = set(k.lower() for (k, v) in headers)
body = escape.utf8(body)
if status_code != 304:
if "content-length" not in header_set:
headers.append(("Content-Length", str(len(body))))
if "content-type" not in header_set:
headers.append(("Content-Type", "text/html; charset=UTF-8"))
if "server" not in header_set:
headers.append(("Server", "TornadoServer/%s" % tornado.version))
start_line = httputil.ResponseStartLine("HTTP/1.1", status_code, reason)
header_obj = httputil.HTTPHeaders()
for key, value in headers:
header_obj.add(key, value)
assert request.connection is not None
request.connection.write_headers(start_line, header_obj, chunk=body)
request.connection.finish()
self._log(status_code, request)
else:
IOLoop.current().spawn_callback(self.handle_request, request)
def environ(self, request: httputil.HTTPServerRequest) -> Dict[Text, Any]:
try:
environ = WSGIContainer.environ(self, request)
except TypeError as e:
environ = WSGIContainer.environ(request)
environ['RAW_URI'] = request.path
self.env = environ
return environ
def _log(self, status_code: int, request: httputil.HTTPServerRequest) -> None:
if status_code < 400:
log_method = access_log.info
elif status_code < 500:
log_method = access_log.warning
else:
log_method = access_log.error
request_time = 1000.0 * request.request_time()
assert request.method is not None
assert request.uri is not None
ip = self.env.get("HTTP_FORWARD_FOR", None) or request.remote_ip
summary = (
request.method # type: ignore[operator]
+ " "
+ request.uri
+ " ("
+ ip
+ ")"
)
log_method("%d %s %.2fms", status_code, summary, request_time)