2014-08-12 16:10:52 +02:00
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# -*- coding: utf-8 -*-
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2016-01-07 05:26:29 +01:00
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# Copyright 2014-2016 OpenMarket Ltd
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2018-03-09 17:17:27 +01:00
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# Copyright 2018 New Vector Ltd
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2014-08-12 16:10:52 +02:00
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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2018-08-01 16:54:06 +02:00
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2018-07-09 08:09:20 +02:00
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import collections
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2020-01-15 16:58:55 +01:00
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import html
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2019-06-29 09:06:55 +02:00
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import http.client
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2018-07-09 08:09:20 +02:00
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import logging
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2019-06-29 09:06:55 +02:00
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import types
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import urllib
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from io import BytesIO
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2014-08-12 16:10:52 +02:00
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2018-07-09 08:09:20 +02:00
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from canonicaljson import encode_canonical_json, encode_pretty_printed_json, json
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2014-12-22 11:16:02 +01:00
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2015-04-30 14:33:30 +02:00
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from twisted.internet import defer
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2017-11-23 16:20:52 +01:00
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from twisted.python import failure
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2018-08-15 09:49:59 +02:00
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from twisted.web import resource
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2014-08-12 16:10:52 +02:00
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from twisted.web.server import NOT_DONE_YET
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2018-08-14 17:13:17 +02:00
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from twisted.web.static import NoRangeStaticProducer
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2014-08-14 12:37:13 +02:00
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from twisted.web.util import redirectTo
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2014-08-12 16:10:52 +02:00
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2018-07-09 08:09:20 +02:00
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import synapse.events
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import synapse.metrics
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from synapse.api.errors import (
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CodeMessageException,
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Codes,
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2020-01-15 16:58:55 +01:00
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RedirectException,
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2018-07-09 08:09:20 +02:00
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SynapseError,
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UnrecognizedRequestError,
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)
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2019-07-03 16:07:04 +02:00
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from synapse.logging.context import preserve_fn
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2019-09-05 15:46:04 +02:00
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from synapse.logging.opentracing import trace_servlet
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2018-07-09 08:09:20 +02:00
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from synapse.util.caches import intern_dict
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2014-08-12 16:10:52 +02:00
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logger = logging.getLogger(__name__)
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2018-05-11 01:17:11 +02:00
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HTML_ERROR_TEMPLATE = """<!DOCTYPE html>
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<html lang=en>
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<head>
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<meta charset="utf-8">
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<title>Error {code}</title>
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</head>
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<body>
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<p>{msg}</p>
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</body>
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</html>
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"""
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2018-04-06 14:20:05 +02:00
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2018-05-10 13:10:27 +02:00
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def wrap_json_request_handler(h):
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2018-05-10 12:59:51 +02:00
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"""Wraps a request handler method with exception handling.
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2018-08-15 09:49:59 +02:00
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Also does the wrapping with request.processing as per wrap_async_request_handler.
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2015-04-21 17:35:53 +02:00
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2018-05-10 00:00:11 +02:00
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The handler method must have a signature of "handle_foo(self, request)",
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2018-08-15 09:49:59 +02:00
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where "request" must be a SynapseRequest.
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2015-04-21 17:35:53 +02:00
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2019-07-02 20:01:28 +02:00
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The handler must return a deferred or a coroutine. If the deferred succeeds
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we assume that a response has been sent. If the deferred fails with a SynapseError we use
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2015-04-21 17:35:53 +02:00
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it to send a JSON response with the appropriate HTTP reponse code. If the
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deferred fails with any other type of error we send a 500 reponse.
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2018-05-10 12:59:51 +02:00
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"""
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2019-06-29 09:06:55 +02:00
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async def wrapped_request_handler(self, request):
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2018-05-10 12:59:51 +02:00
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try:
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2019-06-29 09:06:55 +02:00
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await h(self, request)
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2018-08-01 14:47:07 +02:00
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except SynapseError as e:
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2018-05-10 12:59:51 +02:00
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code = e.code
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2019-06-20 11:32:02 +02:00
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logger.info("%s SynapseError: %s - %s", request, code, e.msg)
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2018-09-20 14:44:20 +02:00
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# Only respond with an error response if we haven't already started
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# writing, otherwise lets just kill the connection
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if request.startedWriting:
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if request.transport:
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try:
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request.transport.abortConnection()
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except Exception:
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# abortConnection throws if the connection is already closed
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pass
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else:
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respond_with_json(
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2019-06-20 11:32:02 +02:00
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request,
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code,
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e.error_dict(),
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send_cors=True,
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2018-09-20 14:44:20 +02:00
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pretty_print=_request_user_agent_is_curl(request),
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)
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2018-05-10 12:59:51 +02:00
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except Exception:
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# failure.Failure() fishes the original Failure out
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# of our stack, and thus gives us a sensible stack
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# trace.
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f = failure.Failure()
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logger.error(
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2019-02-18 16:11:04 +01:00
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"Failed handle request via %r: %r",
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request.request_metrics.name,
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2018-05-10 12:59:51 +02:00
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request,
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2019-02-18 16:11:04 +01:00
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exc_info=(f.type, f.value, f.getTracebackObject()),
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2018-05-10 12:59:51 +02:00
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)
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2018-09-20 14:44:20 +02:00
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# Only respond with an error response if we haven't already started
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# writing, otherwise lets just kill the connection
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if request.startedWriting:
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if request.transport:
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try:
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request.transport.abortConnection()
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except Exception:
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# abortConnection throws if the connection is already closed
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pass
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else:
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respond_with_json(
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request,
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500,
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2019-06-20 11:32:02 +02:00
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{"error": "Internal server error", "errcode": Codes.UNKNOWN},
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2018-09-20 14:44:20 +02:00
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send_cors=True,
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pretty_print=_request_user_agent_is_curl(request),
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)
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2018-05-10 12:59:51 +02:00
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2018-08-15 09:49:59 +02:00
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return wrap_async_request_handler(wrapped_request_handler)
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2018-05-10 12:59:51 +02:00
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2018-05-11 01:17:11 +02:00
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def wrap_html_request_handler(h):
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"""Wraps a request handler method with exception handling.
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2018-08-15 09:49:59 +02:00
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Also does the wrapping with request.processing as per wrap_async_request_handler.
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2018-05-11 01:17:11 +02:00
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The handler method must have a signature of "handle_foo(self, request)",
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2018-08-15 09:49:59 +02:00
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where "request" must be a SynapseRequest.
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2018-05-11 01:17:11 +02:00
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"""
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2019-06-20 11:32:02 +02:00
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2019-06-29 09:06:55 +02:00
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async def wrapped_request_handler(self, request):
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try:
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return await h(self, request)
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except Exception:
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f = failure.Failure()
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return _return_html_error(f, request)
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2018-05-11 01:17:11 +02:00
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2018-08-15 09:49:59 +02:00
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return wrap_async_request_handler(wrapped_request_handler)
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2018-05-11 01:17:11 +02:00
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def _return_html_error(f, request):
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"""Sends an HTML error page corresponding to the given failure
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Args:
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f (twisted.python.failure.Failure):
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2020-01-15 16:58:55 +01:00
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request (twisted.web.server.Request):
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2018-05-11 01:17:11 +02:00
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"""
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if f.check(CodeMessageException):
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cme = f.value
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code = cme.code
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msg = cme.msg
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2020-01-15 16:58:55 +01:00
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if isinstance(cme, RedirectException):
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logger.info("%s redirect to %s", request, cme.location)
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request.setHeader(b"location", cme.location)
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request.cookies.extend(cme.cookies)
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elif isinstance(cme, SynapseError):
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2019-06-20 11:32:02 +02:00
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logger.info("%s SynapseError: %s - %s", request, code, msg)
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2018-05-11 01:17:11 +02:00
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else:
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logger.error(
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2019-02-25 17:56:41 +01:00
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"Failed handle request %r",
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2018-05-11 01:17:11 +02:00
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request,
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2019-02-25 17:56:41 +01:00
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exc_info=(f.type, f.value, f.getTracebackObject()),
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2018-05-11 01:17:11 +02:00
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)
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else:
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2019-06-29 09:06:55 +02:00
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code = http.client.INTERNAL_SERVER_ERROR
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2018-05-11 01:17:11 +02:00
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msg = "Internal server error"
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logger.error(
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2019-02-25 17:56:41 +01:00
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"Failed handle request %r",
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2018-05-11 01:17:11 +02:00
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request,
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2019-02-25 17:56:41 +01:00
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exc_info=(f.type, f.value, f.getTracebackObject()),
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2018-05-11 01:17:11 +02:00
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)
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2020-01-15 16:58:55 +01:00
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body = HTML_ERROR_TEMPLATE.format(code=code, msg=html.escape(msg)).encode("utf-8")
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2018-05-11 01:17:11 +02:00
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request.setResponseCode(code)
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request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
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request.setHeader(b"Content-Length", b"%i" % (len(body),))
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request.write(body)
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finish_request(request)
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2018-08-15 09:49:59 +02:00
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def wrap_async_request_handler(h):
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"""Wraps an async request handler so that it calls request.processing.
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This helps ensure that work done by the request handler after the request is completed
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is correctly recorded against the request metrics/logs.
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2018-05-10 12:59:51 +02:00
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The handler method must have a signature of "handle_foo(self, request)",
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2018-08-15 09:49:59 +02:00
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where "request" must be a SynapseRequest.
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2015-04-21 17:35:53 +02:00
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2018-08-15 09:49:59 +02:00
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The handler may return a deferred, in which case the completion of the request isn't
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logged until the deferred completes.
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2015-04-21 17:07:20 +02:00
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"""
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2019-06-20 11:32:02 +02:00
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2019-06-29 09:06:55 +02:00
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async def wrapped_async_request_handler(self, request):
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2018-08-15 09:49:59 +02:00
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with request.processing():
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2019-06-29 09:06:55 +02:00
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await h(self, request)
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2016-04-28 11:57:49 +02:00
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2018-08-15 09:49:59 +02:00
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# we need to preserve_fn here, because the synchronous render method won't yield for
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# us (obviously)
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return preserve_fn(wrapped_async_request_handler)
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2015-04-21 17:07:20 +02:00
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2014-08-12 16:10:52 +02:00
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class HttpServer(object):
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""" Interface for registering callbacks on a HTTP server
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"""
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2015-12-01 18:34:32 +01:00
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def register_paths(self, method, path_patterns, callback):
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2015-03-31 15:40:02 +02:00
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""" Register a callback that gets fired if we receive a http request
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2014-08-12 16:10:52 +02:00
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with the given method for a path that matches the given regex.
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2015-03-31 15:40:02 +02:00
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If the regex contains groups these gets passed to the calback via
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2014-08-12 16:10:52 +02:00
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an unpacked tuple.
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Args:
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method (str): The method to listen to.
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2015-12-01 18:34:32 +01:00
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path_patterns (list<SRE_Pattern>): The regex used to match requests.
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2014-08-12 16:10:52 +02:00
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callback (function): The function to fire if we receive a matched
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request. The first argument will be the request object and
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subsequent arguments will be any matched groups from the regex.
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This should return a tuple of (code, response).
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"""
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pass
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2014-08-14 11:18:54 +02:00
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class JsonResource(HttpServer, resource.Resource):
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""" This implements the HttpServer interface and provides JSON support for
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Resources.
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2014-08-12 16:10:52 +02:00
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2018-03-09 19:05:41 +01:00
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Register callbacks via register_paths()
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2015-04-01 16:13:14 +02:00
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Callbacks can return a tuple of status code and a dict in which case the
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the dict will automatically be sent to the client as a JSON object.
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The JsonResource is primarily intended for returning JSON, but callbacks
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may send something other than JSON, they may do so by using the methods
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on the request object and instead returning None.
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2014-08-12 16:10:52 +02:00
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"""
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isLeaf = True
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2019-07-24 14:07:35 +02:00
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_PathEntry = collections.namedtuple(
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"_PathEntry", ["pattern", "callback", "servlet_classname"]
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)
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2014-08-12 16:10:52 +02:00
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2015-05-29 13:17:33 +02:00
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def __init__(self, hs, canonical_json=True):
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2014-08-12 16:10:52 +02:00
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resource.Resource.__init__(self)
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2015-05-29 13:17:33 +02:00
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self.canonical_json = canonical_json
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2015-02-09 14:46:22 +01:00
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self.clock = hs.get_clock()
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2014-08-12 16:10:52 +02:00
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self.path_regexs = {}
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2015-03-14 01:12:20 +01:00
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self.hs = hs
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2014-08-12 16:10:52 +02:00
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2019-09-05 15:46:04 +02:00
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def register_paths(
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self, method, path_patterns, callback, servlet_classname, trace=True
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):
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2019-07-24 14:07:35 +02:00
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"""
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Registers a request handler against a regular expression. Later request URLs are
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checked against these regular expressions in order to identify an appropriate
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handler for that request.
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Args:
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method (str): GET, POST etc
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path_patterns (Iterable[str]): A list of regular expressions to which
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the request URLs are compared.
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callback (function): The handler for the request. Usually a Servlet
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servlet_classname (str): The name of the handler to be used in prometheus
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and opentracing logs.
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2019-09-05 15:46:04 +02:00
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trace (bool): Whether we should start a span to trace the servlet.
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2019-07-24 14:07:35 +02:00
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"""
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2018-08-01 16:54:06 +02:00
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method = method.encode("utf-8") # method is bytes on py3
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2019-09-05 15:46:04 +02:00
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if trace:
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# We don't extract the context from the servlet because we can't
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# trust the sender
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callback = trace_servlet(servlet_classname)(callback)
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2015-12-01 18:34:32 +01:00
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for path_pattern in path_patterns:
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2016-07-21 16:56:57 +02:00
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logger.debug("Registering for %s %s", method, path_pattern.pattern)
|
2015-12-01 18:34:32 +01:00
|
|
|
self.path_regexs.setdefault(method, []).append(
|
2019-07-24 14:07:35 +02:00
|
|
|
self._PathEntry(path_pattern, callback, servlet_classname)
|
2015-12-01 18:34:32 +01:00
|
|
|
)
|
2014-08-12 16:10:52 +02:00
|
|
|
|
|
|
|
def render(self, request):
|
2015-03-31 15:40:02 +02:00
|
|
|
""" This gets called by twisted every time someone sends us a request.
|
2014-08-12 16:10:52 +02:00
|
|
|
"""
|
2019-06-29 09:06:55 +02:00
|
|
|
defer.ensureDeferred(self._async_render(request))
|
2018-08-15 09:49:59 +02:00
|
|
|
return NOT_DONE_YET
|
2014-08-12 16:10:52 +02:00
|
|
|
|
2018-05-10 13:10:27 +02:00
|
|
|
@wrap_json_request_handler
|
2019-06-29 09:06:55 +02:00
|
|
|
async def _async_render(self, request):
|
2015-03-31 19:25:10 +02:00
|
|
|
""" This gets called from render() every time someone sends us a request.
|
2014-08-12 16:10:52 +02:00
|
|
|
This checks if anyone has registered a callback for that method and
|
|
|
|
path.
|
|
|
|
"""
|
2019-07-24 14:07:35 +02:00
|
|
|
callback, servlet_classname, group_dict = self._get_handler_for_request(request)
|
2016-02-04 11:15:56 +01:00
|
|
|
|
2019-07-24 14:07:35 +02:00
|
|
|
# Make sure we have a name for this handler in prometheus.
|
2018-05-10 00:49:29 +02:00
|
|
|
request.request_metrics.name = servlet_classname
|
2016-08-19 19:40:31 +02:00
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
# Now trigger the callback. If it returns a response, we send it
|
|
|
|
# here. If it throws an exception, that is handled by the wrapper
|
|
|
|
# installed by @request_handler.
|
2019-06-20 11:32:02 +02:00
|
|
|
kwargs = intern_dict(
|
|
|
|
{
|
2019-06-29 09:06:55 +02:00
|
|
|
name: urllib.parse.unquote(value) if value else value
|
2019-06-20 11:32:02 +02:00
|
|
|
for name, value in group_dict.items()
|
|
|
|
}
|
|
|
|
)
|
2018-01-09 19:27:35 +01:00
|
|
|
|
2019-06-29 09:06:55 +02:00
|
|
|
callback_return = callback(request, **kwargs)
|
|
|
|
|
|
|
|
# Is it synchronous? We'll allow this for now.
|
|
|
|
if isinstance(callback_return, (defer.Deferred, types.CoroutineType)):
|
|
|
|
callback_return = await callback_return
|
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
if callback_return is not None:
|
|
|
|
code, response = callback_return
|
|
|
|
self._send_response(request, code, response)
|
2018-01-09 19:27:35 +01:00
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
def _get_handler_for_request(self, request):
|
|
|
|
"""Finds a callback method to handle the given request
|
2018-01-09 19:27:35 +01:00
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
Args:
|
|
|
|
request (twisted.web.http.Request):
|
2016-08-19 19:40:31 +02:00
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
Returns:
|
2019-07-24 14:07:35 +02:00
|
|
|
Tuple[Callable, str, dict[unicode, unicode]]: callback method, the
|
|
|
|
label to use for that method in prometheus metrics, and the
|
2018-08-01 16:54:06 +02:00
|
|
|
dict mapping keys to path components as specified in the
|
|
|
|
handler's path match regexp.
|
2018-03-09 19:05:41 +01:00
|
|
|
|
|
|
|
The callback will normally be a method registered via
|
|
|
|
register_paths, so will return (possibly via Deferred) either
|
|
|
|
None, or a tuple of (http code, response body).
|
2018-03-09 17:17:27 +01:00
|
|
|
"""
|
2018-04-03 20:41:21 +02:00
|
|
|
if request.method == b"OPTIONS":
|
2019-07-24 14:07:35 +02:00
|
|
|
return _options_handler, "options_request_handler", {}
|
2016-08-19 19:40:31 +02:00
|
|
|
|
2020-02-19 11:38:20 +01:00
|
|
|
request_path = request.path.decode("ascii")
|
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
# Loop through all the registered callbacks to check if the method
|
|
|
|
# and path regex match
|
|
|
|
for path_entry in self.path_regexs.get(request.method, []):
|
2020-02-19 11:38:20 +01:00
|
|
|
m = path_entry.pattern.match(request_path)
|
2018-03-09 17:17:27 +01:00
|
|
|
if m:
|
|
|
|
# We found a match!
|
2019-07-24 14:07:35 +02:00
|
|
|
return path_entry.callback, path_entry.servlet_classname, m.groupdict()
|
2015-04-21 17:07:20 +02:00
|
|
|
|
|
|
|
# Huh. No one wanted to handle that? Fiiiiiine. Send 400.
|
2019-07-24 14:07:35 +02:00
|
|
|
return _unrecognised_request_handler, "unrecognised_request_handler", {}
|
2014-08-12 16:10:52 +02:00
|
|
|
|
2019-06-20 11:32:02 +02:00
|
|
|
def _send_response(
|
|
|
|
self, request, code, response_json_object, response_code_message=None
|
|
|
|
):
|
2014-08-12 16:10:52 +02:00
|
|
|
# TODO: Only enable CORS for the requests that need it.
|
2015-02-18 17:51:33 +01:00
|
|
|
respond_with_json(
|
2019-06-20 11:32:02 +02:00
|
|
|
request,
|
|
|
|
code,
|
|
|
|
response_json_object,
|
2015-02-18 17:51:33 +01:00
|
|
|
send_cors=True,
|
|
|
|
response_code_message=response_code_message,
|
2015-04-21 17:07:20 +02:00
|
|
|
pretty_print=_request_user_agent_is_curl(request),
|
2015-05-29 13:17:33 +02:00
|
|
|
canonical_json=self.canonical_json,
|
2015-02-18 17:51:33 +01:00
|
|
|
)
|
2014-08-12 16:10:52 +02:00
|
|
|
|
|
|
|
|
2019-06-29 09:06:55 +02:00
|
|
|
class DirectServeResource(resource.Resource):
|
|
|
|
def render(self, request):
|
|
|
|
"""
|
|
|
|
Render the request, using an asynchronous render handler if it exists.
|
|
|
|
"""
|
2019-07-02 20:01:28 +02:00
|
|
|
async_render_callback_name = "_async_render_" + request.method.decode("ascii")
|
2019-06-29 09:06:55 +02:00
|
|
|
|
2019-07-02 20:01:28 +02:00
|
|
|
# Try and get the async renderer
|
|
|
|
callback = getattr(self, async_render_callback_name, None)
|
2019-06-29 09:06:55 +02:00
|
|
|
|
2019-07-02 20:01:28 +02:00
|
|
|
# No async renderer for this request method.
|
|
|
|
if not callback:
|
|
|
|
return super().render(request)
|
|
|
|
|
2019-10-11 12:22:36 +02:00
|
|
|
resp = trace_servlet(self.__class__.__name__)(callback)(request)
|
2019-07-02 20:01:28 +02:00
|
|
|
|
|
|
|
# If it's a coroutine, turn it into a Deferred
|
|
|
|
if isinstance(resp, types.CoroutineType):
|
|
|
|
defer.ensureDeferred(resp)
|
|
|
|
|
|
|
|
return NOT_DONE_YET
|
2019-06-29 09:06:55 +02:00
|
|
|
|
|
|
|
|
2018-03-09 17:17:27 +01:00
|
|
|
def _options_handler(request):
|
2018-03-09 19:05:41 +01:00
|
|
|
"""Request handler for OPTIONS requests
|
|
|
|
|
|
|
|
This is a request handler suitable for return from
|
|
|
|
_get_handler_for_request. It returns a 200 and an empty body.
|
|
|
|
|
|
|
|
Args:
|
|
|
|
request (twisted.web.http.Request):
|
|
|
|
|
|
|
|
Returns:
|
|
|
|
Tuple[int, dict]: http code, response body.
|
|
|
|
"""
|
2018-03-09 17:19:18 +01:00
|
|
|
return 200, {}
|
2018-03-09 17:17:27 +01:00
|
|
|
|
|
|
|
|
|
|
|
def _unrecognised_request_handler(request):
|
2018-03-09 19:05:41 +01:00
|
|
|
"""Request handler for unrecognised requests
|
|
|
|
|
|
|
|
This is a request handler suitable for return from
|
|
|
|
_get_handler_for_request. It actually just raises an
|
|
|
|
UnrecognizedRequestError.
|
|
|
|
|
|
|
|
Args:
|
|
|
|
request (twisted.web.http.Request):
|
|
|
|
"""
|
2018-03-09 17:17:27 +01:00
|
|
|
raise UnrecognizedRequestError()
|
|
|
|
|
|
|
|
|
2014-08-14 12:37:13 +02:00
|
|
|
class RootRedirect(resource.Resource):
|
|
|
|
"""Redirects the root '/' path to another path."""
|
|
|
|
|
|
|
|
def __init__(self, path):
|
|
|
|
resource.Resource.__init__(self)
|
|
|
|
self.url = path
|
|
|
|
|
|
|
|
def render_GET(self, request):
|
2019-06-20 11:32:02 +02:00
|
|
|
return redirectTo(self.url.encode("ascii"), request)
|
2014-08-14 12:37:13 +02:00
|
|
|
|
|
|
|
def getChild(self, name, request):
|
|
|
|
if len(name) == 0:
|
|
|
|
return self # select ourselves as the child to render
|
|
|
|
return resource.Resource.getChild(self, name, request)
|
|
|
|
|
|
|
|
|
2019-06-20 11:32:02 +02:00
|
|
|
def respond_with_json(
|
|
|
|
request,
|
|
|
|
code,
|
|
|
|
json_object,
|
|
|
|
send_cors=False,
|
|
|
|
response_code_message=None,
|
|
|
|
pretty_print=False,
|
|
|
|
canonical_json=True,
|
|
|
|
):
|
2018-01-16 18:58:16 +01:00
|
|
|
# could alternatively use request.notifyFinish() and flip a flag when
|
|
|
|
# the Deferred fires, but since the flag is RIGHT THERE it seems like
|
|
|
|
# a waste.
|
|
|
|
if request._disconnected:
|
2019-10-31 11:23:24 +01:00
|
|
|
logger.warning(
|
2019-06-20 11:32:02 +02:00
|
|
|
"Not sending response to request %s, already disconnected.", request
|
|
|
|
)
|
2018-01-16 18:58:16 +01:00
|
|
|
return
|
|
|
|
|
2015-04-21 17:07:20 +02:00
|
|
|
if pretty_print:
|
2018-08-14 17:13:17 +02:00
|
|
|
json_bytes = encode_pretty_printed_json(json_object) + b"\n"
|
2014-12-02 16:09:51 +01:00
|
|
|
else:
|
2015-08-24 17:17:38 +02:00
|
|
|
if canonical_json or synapse.events.USE_FROZEN_DICTS:
|
2018-08-01 16:54:06 +02:00
|
|
|
# canonicaljson already encodes to bytes
|
2015-05-29 13:17:33 +02:00
|
|
|
json_bytes = encode_canonical_json(json_object)
|
|
|
|
else:
|
2018-08-01 16:54:06 +02:00
|
|
|
json_bytes = json.dumps(json_object).encode("utf-8")
|
2014-12-02 16:09:51 +01:00
|
|
|
|
2015-02-18 17:51:33 +01:00
|
|
|
return respond_with_json_bytes(
|
2019-06-20 11:32:02 +02:00
|
|
|
request,
|
|
|
|
code,
|
|
|
|
json_bytes,
|
2015-02-18 17:51:33 +01:00
|
|
|
send_cors=send_cors,
|
|
|
|
response_code_message=response_code_message,
|
|
|
|
)
|
2014-12-02 16:09:51 +01:00
|
|
|
|
|
|
|
|
2019-06-20 11:32:02 +02:00
|
|
|
def respond_with_json_bytes(
|
|
|
|
request, code, json_bytes, send_cors=False, response_code_message=None
|
|
|
|
):
|
2014-08-12 16:10:52 +02:00
|
|
|
"""Sends encoded JSON in response to the given request.
|
|
|
|
|
|
|
|
Args:
|
|
|
|
request (twisted.web.http.Request): The http request to respond to.
|
|
|
|
code (int): The HTTP response code.
|
|
|
|
json_bytes (bytes): The json bytes to use as the response body.
|
|
|
|
send_cors (bool): Whether to send Cross-Origin Resource Sharing headers
|
|
|
|
http://www.w3.org/TR/cors/
|
|
|
|
Returns:
|
|
|
|
twisted.web.server.NOT_DONE_YET"""
|
|
|
|
|
2014-09-03 10:37:44 +02:00
|
|
|
request.setResponseCode(code, message=response_code_message)
|
2014-08-12 16:10:52 +02:00
|
|
|
request.setHeader(b"Content-Type", b"application/json")
|
2015-01-06 14:21:39 +01:00
|
|
|
request.setHeader(b"Content-Length", b"%d" % (len(json_bytes),))
|
2018-03-21 18:46:26 +01:00
|
|
|
request.setHeader(b"Cache-Control", b"no-cache, no-store, must-revalidate")
|
2014-08-12 16:10:52 +02:00
|
|
|
|
|
|
|
if send_cors:
|
2016-11-02 12:29:25 +01:00
|
|
|
set_cors_headers(request)
|
2014-08-12 16:10:52 +02:00
|
|
|
|
2018-08-14 17:13:17 +02:00
|
|
|
# todo: we can almost certainly avoid this copy and encode the json straight into
|
|
|
|
# the bytesIO, but it would involve faffing around with string->bytes wrappers.
|
|
|
|
bytes_io = BytesIO(json_bytes)
|
|
|
|
|
|
|
|
producer = NoRangeStaticProducer(request, bytes_io)
|
|
|
|
producer.start()
|
2014-08-12 16:10:52 +02:00
|
|
|
return NOT_DONE_YET
|
2015-04-21 17:07:20 +02:00
|
|
|
|
|
|
|
|
2016-11-02 12:29:25 +01:00
|
|
|
def set_cors_headers(request):
|
|
|
|
"""Set the CORs headers so that javascript running in a web browsers can
|
|
|
|
use this API
|
|
|
|
|
|
|
|
Args:
|
|
|
|
request (twisted.web.http.Request): The http request to add CORs to.
|
|
|
|
"""
|
2018-11-07 15:37:43 +01:00
|
|
|
request.setHeader(b"Access-Control-Allow-Origin", b"*")
|
2016-11-02 12:29:25 +01:00
|
|
|
request.setHeader(
|
2018-11-07 15:37:43 +01:00
|
|
|
b"Access-Control-Allow-Methods", b"GET, POST, PUT, DELETE, OPTIONS"
|
2016-11-02 12:29:25 +01:00
|
|
|
)
|
|
|
|
request.setHeader(
|
2018-11-07 15:37:43 +01:00
|
|
|
b"Access-Control-Allow-Headers",
|
2019-06-20 11:32:02 +02:00
|
|
|
b"Origin, X-Requested-With, Content-Type, Accept, Authorization",
|
2016-11-02 12:29:25 +01:00
|
|
|
)
|
|
|
|
|
|
|
|
|
2016-02-12 14:46:59 +01:00
|
|
|
def finish_request(request):
|
|
|
|
""" Finish writing the response to the request.
|
|
|
|
|
|
|
|
Twisted throws a RuntimeException if the connection closed before the
|
|
|
|
response was written but doesn't provide a convenient or reliable way to
|
|
|
|
determine if the connection was closed. So we catch and log the RuntimeException
|
|
|
|
|
|
|
|
You might think that ``request.notifyFinish`` could be used to tell if the
|
|
|
|
request was finished. However the deferred it returns won't fire if the
|
|
|
|
connection was already closed, meaning we'd have to have called the method
|
|
|
|
right at the start of the request. By the time we want to write the response
|
|
|
|
it will already be too late.
|
|
|
|
"""
|
|
|
|
try:
|
|
|
|
request.finish()
|
|
|
|
except RuntimeError as e:
|
|
|
|
logger.info("Connection disconnected before response was written: %r", e)
|
|
|
|
|
|
|
|
|
2015-04-21 17:07:20 +02:00
|
|
|
def _request_user_agent_is_curl(request):
|
2019-06-20 11:32:02 +02:00
|
|
|
user_agents = request.requestHeaders.getRawHeaders(b"User-Agent", default=[])
|
2015-04-21 17:07:20 +02:00
|
|
|
for user_agent in user_agents:
|
2018-04-28 23:56:59 +02:00
|
|
|
if b"curl" in user_agent:
|
2015-04-21 17:07:20 +02:00
|
|
|
return True
|
|
|
|
return False
|