mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-26 04:05:38 +00:00
![Richard van der Hoff](/assets/img/avatar_default.png)
* Remove `on_timeout_cancel` from `timeout_deferred` The `on_timeout_cancel` param to `timeout_deferred` wasn't always called on a timeout (in particular if the canceller raised an exception), so it was unreliable. It was also only used in one place, and to be honest it's easier to do what it does a different way. * Fix handling of connection timeouts in outgoing http requests Turns out that if we get a timeout during connection, then a different exception is raised, which wasn't always handled correctly. To fix it, catch the exception in SimpleHttpClient and turn it into a RequestTimedOutError (which is already a documented exception). Also add a description to RequestTimedOutError so that we can see which stage it failed at. * Fix incorrect handling of timeouts reading federation responses This was trapping the wrong sort of TimeoutError, so was never being hit. The effect was relatively minor, but we should fix this so that it does the expected thing. * Fix inconsistent handling of `timeout` param between methods `get_json`, `put_json` and `delete_json` were applying a different timeout to the response body to `post_json`; bring them in line and test. Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com> Co-authored-by: Erik Johnston <erik@matrix.org>
1090 lines
37 KiB
Python
1090 lines
37 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 New Vector Ltd
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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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import cgi
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import logging
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import random
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import sys
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import urllib
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from io import BytesIO
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import attr
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import treq
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from canonicaljson import encode_canonical_json
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from prometheus_client import Counter
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from signedjson.sign import sign_json
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from zope.interface import implementer
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from twisted.internet import defer, protocol
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from twisted.internet.error import DNSLookupError
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from twisted.internet.interfaces import IReactorPluggableNameResolver, IReactorTime
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from twisted.internet.task import _EPSILON, Cooperator
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from twisted.web._newclient import ResponseDone
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from twisted.web.http_headers import Headers
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from twisted.web.iweb import IResponse
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import synapse.metrics
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import synapse.util.retryutils
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from synapse.api.errors import (
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Codes,
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FederationDeniedError,
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HttpResponseException,
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RequestSendFailed,
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SynapseError,
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)
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from synapse.http import QuieterFileBodyProducer
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from synapse.http.client import BlacklistingAgentWrapper, IPBlacklistingResolver
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from synapse.http.federation.matrix_federation_agent import MatrixFederationAgent
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from synapse.logging.context import make_deferred_yieldable
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from synapse.logging.opentracing import (
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inject_active_span_byte_dict,
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set_tag,
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start_active_span,
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tags,
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)
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from synapse.util import json_decoder
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from synapse.util.async_helpers import timeout_deferred
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from synapse.util.metrics import Measure
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logger = logging.getLogger(__name__)
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outgoing_requests_counter = Counter(
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"synapse_http_matrixfederationclient_requests", "", ["method"]
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)
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incoming_responses_counter = Counter(
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"synapse_http_matrixfederationclient_responses", "", ["method", "code"]
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)
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MAX_LONG_RETRIES = 10
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MAX_SHORT_RETRIES = 3
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MAXINT = sys.maxsize
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_next_id = 1
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@attr.s(slots=True, frozen=True)
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class MatrixFederationRequest:
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method = attr.ib()
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"""HTTP method
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:type: str
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"""
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path = attr.ib()
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"""HTTP path
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:type: str
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"""
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destination = attr.ib()
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"""The remote server to send the HTTP request to.
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:type: str"""
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json = attr.ib(default=None)
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"""JSON to send in the body.
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:type: dict|None
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"""
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json_callback = attr.ib(default=None)
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"""A callback to generate the JSON.
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:type: func|None
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"""
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query = attr.ib(default=None)
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"""Query arguments.
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:type: dict|None
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"""
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txn_id = attr.ib(default=None)
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"""Unique ID for this request (for logging)
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:type: str|None
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"""
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uri = attr.ib(init=False, type=bytes)
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"""The URI of this request
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"""
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def __attrs_post_init__(self):
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global _next_id
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txn_id = "%s-O-%s" % (self.method, _next_id)
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_next_id = (_next_id + 1) % (MAXINT - 1)
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object.__setattr__(self, "txn_id", txn_id)
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destination_bytes = self.destination.encode("ascii")
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path_bytes = self.path.encode("ascii")
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if self.query:
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query_bytes = encode_query_args(self.query)
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else:
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query_bytes = b""
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# The object is frozen so we can pre-compute this.
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uri = urllib.parse.urlunparse(
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(b"matrix", destination_bytes, path_bytes, None, query_bytes, b"")
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)
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object.__setattr__(self, "uri", uri)
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def get_json(self):
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if self.json_callback:
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return self.json_callback()
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return self.json
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async def _handle_json_response(
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reactor: IReactorTime,
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timeout_sec: float,
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request: MatrixFederationRequest,
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response: IResponse,
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start_ms: int,
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):
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"""
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Reads the JSON body of a response, with a timeout
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Args:
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reactor: twisted reactor, for the timeout
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timeout_sec: number of seconds to wait for response to complete
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request: the request that triggered the response
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response: response to the request
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start_ms: Timestamp when request was made
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Returns:
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dict: parsed JSON response
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"""
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try:
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check_content_type_is_json(response.headers)
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# Use the custom JSON decoder (partially re-implements treq.json_content).
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d = treq.text_content(response, encoding="utf-8")
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d.addCallback(json_decoder.decode)
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d = timeout_deferred(d, timeout=timeout_sec, reactor=reactor)
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body = await make_deferred_yieldable(d)
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except defer.TimeoutError as e:
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logger.warning(
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"{%s} [%s] Timed out reading response - %s %s",
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request.txn_id,
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request.destination,
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request.method,
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request.uri.decode("ascii"),
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)
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raise RequestSendFailed(e, can_retry=True) from e
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except Exception as e:
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logger.warning(
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"{%s} [%s] Error reading response %s %s: %s",
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request.txn_id,
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request.destination,
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request.method,
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request.uri.decode("ascii"),
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e,
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)
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raise
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time_taken_secs = reactor.seconds() - start_ms / 1000
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logger.info(
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"{%s} [%s] Completed request: %d %s in %.2f secs - %s %s",
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request.txn_id,
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request.destination,
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response.code,
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response.phrase.decode("ascii", errors="replace"),
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time_taken_secs,
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request.method,
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request.uri.decode("ascii"),
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)
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return body
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class MatrixFederationHttpClient:
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"""HTTP client used to talk to other homeservers over the federation
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protocol. Send client certificates and signs requests.
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Attributes:
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agent (twisted.web.client.Agent): The twisted Agent used to send the
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requests.
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"""
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def __init__(self, hs, tls_client_options_factory):
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self.hs = hs
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self.signing_key = hs.signing_key
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self.server_name = hs.hostname
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real_reactor = hs.get_reactor()
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# We need to use a DNS resolver which filters out blacklisted IP
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# addresses, to prevent DNS rebinding.
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nameResolver = IPBlacklistingResolver(
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real_reactor, None, hs.config.federation_ip_range_blacklist
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)
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@implementer(IReactorPluggableNameResolver)
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class Reactor:
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def __getattr__(_self, attr):
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if attr == "nameResolver":
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return nameResolver
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else:
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return getattr(real_reactor, attr)
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self.reactor = Reactor()
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user_agent = hs.version_string
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if hs.config.user_agent_suffix:
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user_agent = "%s %s" % (user_agent, hs.config.user_agent_suffix)
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user_agent = user_agent.encode("ascii")
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self.agent = MatrixFederationAgent(
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self.reactor, tls_client_options_factory, user_agent
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)
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# Use a BlacklistingAgentWrapper to prevent circumventing the IP
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# blacklist via IP literals in server names
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self.agent = BlacklistingAgentWrapper(
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self.agent,
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self.reactor,
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ip_blacklist=hs.config.federation_ip_range_blacklist,
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)
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self.clock = hs.get_clock()
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self._store = hs.get_datastore()
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self.version_string_bytes = hs.version_string.encode("ascii")
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self.default_timeout = 60
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def schedule(x):
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self.reactor.callLater(_EPSILON, x)
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self._cooperator = Cooperator(scheduler=schedule)
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async def _send_request_with_optional_trailing_slash(
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self, request, try_trailing_slash_on_400=False, **send_request_args
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):
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"""Wrapper for _send_request which can optionally retry the request
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upon receiving a combination of a 400 HTTP response code and a
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'M_UNRECOGNIZED' errcode. This is a workaround for Synapse <= v0.99.3
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due to #3622.
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Args:
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request (MatrixFederationRequest): details of request to be sent
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try_trailing_slash_on_400 (bool): Whether on receiving a 400
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'M_UNRECOGNIZED' from the server to retry the request with a
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trailing slash appended to the request path.
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send_request_args (Dict): A dictionary of arguments to pass to
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`_send_request()`.
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Raises:
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HttpResponseException: If we get an HTTP response code >= 300
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(except 429).
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Returns:
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Dict: Parsed JSON response body.
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"""
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try:
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response = await self._send_request(request, **send_request_args)
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except HttpResponseException as e:
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# Received an HTTP error > 300. Check if it meets the requirements
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# to retry with a trailing slash
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if not try_trailing_slash_on_400:
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raise
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if e.code != 400 or e.to_synapse_error().errcode != "M_UNRECOGNIZED":
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raise
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# Retry with a trailing slash if we received a 400 with
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# 'M_UNRECOGNIZED' which some endpoints can return when omitting a
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# trailing slash on Synapse <= v0.99.3.
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logger.info("Retrying request with trailing slash")
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# Request is frozen so we create a new instance
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request = attr.evolve(request, path=request.path + "/")
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response = await self._send_request(request, **send_request_args)
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return response
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async def _send_request(
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self,
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request,
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retry_on_dns_fail=True,
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timeout=None,
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long_retries=False,
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ignore_backoff=False,
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backoff_on_404=False,
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):
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"""
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Sends a request to the given server.
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Args:
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request (MatrixFederationRequest): details of request to be sent
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timeout (int|None): number of milliseconds to wait for the response headers
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(including connecting to the server), *for each attempt*.
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60s by default.
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long_retries (bool): whether to use the long retry algorithm.
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The regular retry algorithm makes 4 attempts, with intervals
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[0.5s, 1s, 2s].
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The long retry algorithm makes 11 attempts, with intervals
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[4s, 16s, 60s, 60s, ...]
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Both algorithms add -20%/+40% jitter to the retry intervals.
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Note that the above intervals are *in addition* to the time spent
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waiting for the request to complete (up to `timeout` ms).
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NB: the long retry algorithm takes over 20 minutes to complete, with
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a default timeout of 60s!
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ignore_backoff (bool): true to ignore the historical backoff data
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and try the request anyway.
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backoff_on_404 (bool): Back off if we get a 404
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Returns:
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twisted.web.client.Response: resolves with the HTTP
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response object on success.
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Raises:
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HttpResponseException: If we get an HTTP response code >= 300
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(except 429).
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NotRetryingDestination: If we are not yet ready to retry this
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server.
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FederationDeniedError: If this destination is not on our
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federation whitelist
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RequestSendFailed: If there were problems connecting to the
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remote, due to e.g. DNS failures, connection timeouts etc.
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"""
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if timeout:
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_sec_timeout = timeout / 1000
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else:
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_sec_timeout = self.default_timeout
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if (
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self.hs.config.federation_domain_whitelist is not None
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and request.destination not in self.hs.config.federation_domain_whitelist
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):
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raise FederationDeniedError(request.destination)
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limiter = await synapse.util.retryutils.get_retry_limiter(
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request.destination,
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self.clock,
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self._store,
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backoff_on_404=backoff_on_404,
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ignore_backoff=ignore_backoff,
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)
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method_bytes = request.method.encode("ascii")
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destination_bytes = request.destination.encode("ascii")
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path_bytes = request.path.encode("ascii")
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if request.query:
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query_bytes = encode_query_args(request.query)
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else:
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query_bytes = b""
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scope = start_active_span(
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"outgoing-federation-request",
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tags={
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tags.SPAN_KIND: tags.SPAN_KIND_RPC_CLIENT,
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tags.PEER_ADDRESS: request.destination,
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tags.HTTP_METHOD: request.method,
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tags.HTTP_URL: request.path,
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},
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finish_on_close=True,
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)
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# Inject the span into the headers
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headers_dict = {}
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inject_active_span_byte_dict(headers_dict, request.destination)
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headers_dict[b"User-Agent"] = [self.version_string_bytes]
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with limiter, scope:
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# XXX: Would be much nicer to retry only at the transaction-layer
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# (once we have reliable transactions in place)
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if long_retries:
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retries_left = MAX_LONG_RETRIES
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else:
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retries_left = MAX_SHORT_RETRIES
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url_bytes = request.uri
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url_str = url_bytes.decode("ascii")
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url_to_sign_bytes = urllib.parse.urlunparse(
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(b"", b"", path_bytes, None, query_bytes, b"")
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)
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while True:
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try:
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json = request.get_json()
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if json:
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headers_dict[b"Content-Type"] = [b"application/json"]
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auth_headers = self.build_auth_headers(
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destination_bytes, method_bytes, url_to_sign_bytes, json
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)
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data = encode_canonical_json(json)
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producer = QuieterFileBodyProducer(
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BytesIO(data), cooperator=self._cooperator
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)
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else:
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producer = None
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auth_headers = self.build_auth_headers(
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destination_bytes, method_bytes, url_to_sign_bytes
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)
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headers_dict[b"Authorization"] = auth_headers
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logger.debug(
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"{%s} [%s] Sending request: %s %s; timeout %fs",
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request.txn_id,
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request.destination,
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request.method,
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url_str,
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_sec_timeout,
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)
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outgoing_requests_counter.labels(request.method).inc()
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try:
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with Measure(self.clock, "outbound_request"):
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# we don't want all the fancy cookie and redirect handling
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# that treq.request gives: just use the raw Agent.
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request_deferred = self.agent.request(
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method_bytes,
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url_bytes,
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headers=Headers(headers_dict),
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bodyProducer=producer,
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)
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|
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request_deferred = timeout_deferred(
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request_deferred,
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timeout=_sec_timeout,
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reactor=self.reactor,
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)
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|
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response = await request_deferred
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except DNSLookupError as e:
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raise RequestSendFailed(e, can_retry=retry_on_dns_fail) from e
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except Exception as e:
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raise RequestSendFailed(e, can_retry=True) from e
|
|
|
|
incoming_responses_counter.labels(
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request.method, response.code
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).inc()
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set_tag(tags.HTTP_STATUS_CODE, response.code)
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response_phrase = response.phrase.decode("ascii", errors="replace")
|
|
|
|
if 200 <= response.code < 300:
|
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logger.debug(
|
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"{%s} [%s] Got response headers: %d %s",
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request.txn_id,
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request.destination,
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response.code,
|
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response_phrase,
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)
|
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pass
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else:
|
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logger.info(
|
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"{%s} [%s] Got response headers: %d %s",
|
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request.txn_id,
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request.destination,
|
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response.code,
|
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response_phrase,
|
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)
|
|
# :'(
|
|
# Update transactions table?
|
|
d = treq.content(response)
|
|
d = timeout_deferred(
|
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d, timeout=_sec_timeout, reactor=self.reactor
|
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)
|
|
|
|
try:
|
|
body = await make_deferred_yieldable(d)
|
|
except Exception as e:
|
|
# Eh, we're already going to raise an exception so lets
|
|
# ignore if this fails.
|
|
logger.warning(
|
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"{%s} [%s] Failed to get error response: %s %s: %s",
|
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request.txn_id,
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request.destination,
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request.method,
|
|
url_str,
|
|
_flatten_response_never_received(e),
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)
|
|
body = None
|
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|
|
e = HttpResponseException(response.code, response_phrase, body)
|
|
|
|
# Retry if the error is a 429 (Too Many Requests),
|
|
# otherwise just raise a standard HttpResponseException
|
|
if response.code == 429:
|
|
raise RequestSendFailed(e, can_retry=True) from e
|
|
else:
|
|
raise e
|
|
|
|
break
|
|
except RequestSendFailed as e:
|
|
logger.info(
|
|
"{%s} [%s] Request failed: %s %s: %s",
|
|
request.txn_id,
|
|
request.destination,
|
|
request.method,
|
|
url_str,
|
|
_flatten_response_never_received(e.inner_exception),
|
|
)
|
|
|
|
if not e.can_retry:
|
|
raise
|
|
|
|
if retries_left and not timeout:
|
|
if long_retries:
|
|
delay = 4 ** (MAX_LONG_RETRIES + 1 - retries_left)
|
|
delay = min(delay, 60)
|
|
delay *= random.uniform(0.8, 1.4)
|
|
else:
|
|
delay = 0.5 * 2 ** (MAX_SHORT_RETRIES - retries_left)
|
|
delay = min(delay, 2)
|
|
delay *= random.uniform(0.8, 1.4)
|
|
|
|
logger.debug(
|
|
"{%s} [%s] Waiting %ss before re-sending...",
|
|
request.txn_id,
|
|
request.destination,
|
|
delay,
|
|
)
|
|
|
|
await self.clock.sleep(delay)
|
|
retries_left -= 1
|
|
else:
|
|
raise
|
|
|
|
except Exception as e:
|
|
logger.warning(
|
|
"{%s} [%s] Request failed: %s %s: %s",
|
|
request.txn_id,
|
|
request.destination,
|
|
request.method,
|
|
url_str,
|
|
_flatten_response_never_received(e),
|
|
)
|
|
raise
|
|
return response
|
|
|
|
def build_auth_headers(
|
|
self, destination, method, url_bytes, content=None, destination_is=None
|
|
):
|
|
"""
|
|
Builds the Authorization headers for a federation request
|
|
Args:
|
|
destination (bytes|None): The desination homeserver of the request.
|
|
May be None if the destination is an identity server, in which case
|
|
destination_is must be non-None.
|
|
method (bytes): The HTTP method of the request
|
|
url_bytes (bytes): The URI path of the request
|
|
content (object): The body of the request
|
|
destination_is (bytes): As 'destination', but if the destination is an
|
|
identity server
|
|
|
|
Returns:
|
|
list[bytes]: a list of headers to be added as "Authorization:" headers
|
|
"""
|
|
request = {
|
|
"method": method.decode("ascii"),
|
|
"uri": url_bytes.decode("ascii"),
|
|
"origin": self.server_name,
|
|
}
|
|
|
|
if destination is not None:
|
|
request["destination"] = destination.decode("ascii")
|
|
|
|
if destination_is is not None:
|
|
request["destination_is"] = destination_is.decode("ascii")
|
|
|
|
if content is not None:
|
|
request["content"] = content
|
|
|
|
request = sign_json(request, self.server_name, self.signing_key)
|
|
|
|
auth_headers = []
|
|
|
|
for key, sig in request["signatures"][self.server_name].items():
|
|
auth_headers.append(
|
|
(
|
|
'X-Matrix origin=%s,key="%s",sig="%s"'
|
|
% (self.server_name, key, sig)
|
|
).encode("ascii")
|
|
)
|
|
return auth_headers
|
|
|
|
async def put_json(
|
|
self,
|
|
destination,
|
|
path,
|
|
args={},
|
|
data={},
|
|
json_data_callback=None,
|
|
long_retries=False,
|
|
timeout=None,
|
|
ignore_backoff=False,
|
|
backoff_on_404=False,
|
|
try_trailing_slash_on_400=False,
|
|
):
|
|
""" Sends the specifed json data using PUT
|
|
|
|
Args:
|
|
destination (str): The remote server to send the HTTP request
|
|
to.
|
|
path (str): The HTTP path.
|
|
args (dict): query params
|
|
data (dict): A dict containing the data that will be used as
|
|
the request body. This will be encoded as JSON.
|
|
json_data_callback (callable): A callable returning the dict to
|
|
use as the request body.
|
|
|
|
long_retries (bool): whether to use the long retry algorithm. See
|
|
docs on _send_request for details.
|
|
|
|
timeout (int|None): number of milliseconds to wait for the response.
|
|
self._default_timeout (60s) by default.
|
|
|
|
Note that we may make several attempts to send the request; this
|
|
timeout applies to the time spent waiting for response headers for
|
|
*each* attempt (including connection time) as well as the time spent
|
|
reading the response body after a 200 response.
|
|
|
|
ignore_backoff (bool): true to ignore the historical backoff data
|
|
and try the request anyway.
|
|
backoff_on_404 (bool): True if we should count a 404 response as
|
|
a failure of the server (and should therefore back off future
|
|
requests).
|
|
try_trailing_slash_on_400 (bool): True if on a 400 M_UNRECOGNIZED
|
|
response we should try appending a trailing slash to the end
|
|
of the request. Workaround for #3622 in Synapse <= v0.99.3. This
|
|
will be attempted before backing off if backing off has been
|
|
enabled.
|
|
|
|
Returns:
|
|
dict|list: Succeeds when we get a 2xx HTTP response. The
|
|
result will be the decoded JSON body.
|
|
|
|
Raises:
|
|
HttpResponseException: If we get an HTTP response code >= 300
|
|
(except 429).
|
|
NotRetryingDestination: If we are not yet ready to retry this
|
|
server.
|
|
FederationDeniedError: If this destination is not on our
|
|
federation whitelist
|
|
RequestSendFailed: If there were problems connecting to the
|
|
remote, due to e.g. DNS failures, connection timeouts etc.
|
|
"""
|
|
request = MatrixFederationRequest(
|
|
method="PUT",
|
|
destination=destination,
|
|
path=path,
|
|
query=args,
|
|
json_callback=json_data_callback,
|
|
json=data,
|
|
)
|
|
|
|
start_ms = self.clock.time_msec()
|
|
|
|
response = await self._send_request_with_optional_trailing_slash(
|
|
request,
|
|
try_trailing_slash_on_400,
|
|
backoff_on_404=backoff_on_404,
|
|
ignore_backoff=ignore_backoff,
|
|
long_retries=long_retries,
|
|
timeout=timeout,
|
|
)
|
|
|
|
if timeout is not None:
|
|
_sec_timeout = timeout / 1000
|
|
else:
|
|
_sec_timeout = self.default_timeout
|
|
|
|
body = await _handle_json_response(
|
|
self.reactor, _sec_timeout, request, response, start_ms
|
|
)
|
|
|
|
return body
|
|
|
|
async def post_json(
|
|
self,
|
|
destination,
|
|
path,
|
|
data={},
|
|
long_retries=False,
|
|
timeout=None,
|
|
ignore_backoff=False,
|
|
args={},
|
|
):
|
|
""" Sends the specifed json data using POST
|
|
|
|
Args:
|
|
destination (str): The remote server to send the HTTP request
|
|
to.
|
|
|
|
path (str): The HTTP path.
|
|
|
|
data (dict): A dict containing the data that will be used as
|
|
the request body. This will be encoded as JSON.
|
|
|
|
long_retries (bool): whether to use the long retry algorithm. See
|
|
docs on _send_request for details.
|
|
|
|
timeout (int|None): number of milliseconds to wait for the response.
|
|
self._default_timeout (60s) by default.
|
|
|
|
Note that we may make several attempts to send the request; this
|
|
timeout applies to the time spent waiting for response headers for
|
|
*each* attempt (including connection time) as well as the time spent
|
|
reading the response body after a 200 response.
|
|
|
|
ignore_backoff (bool): true to ignore the historical backoff data and
|
|
try the request anyway.
|
|
|
|
args (dict): query params
|
|
Returns:
|
|
dict|list: Succeeds when we get a 2xx HTTP response. The
|
|
result will be the decoded JSON body.
|
|
|
|
Raises:
|
|
HttpResponseException: If we get an HTTP response code >= 300
|
|
(except 429).
|
|
NotRetryingDestination: If we are not yet ready to retry this
|
|
server.
|
|
FederationDeniedError: If this destination is not on our
|
|
federation whitelist
|
|
RequestSendFailed: If there were problems connecting to the
|
|
remote, due to e.g. DNS failures, connection timeouts etc.
|
|
"""
|
|
|
|
request = MatrixFederationRequest(
|
|
method="POST", destination=destination, path=path, query=args, json=data
|
|
)
|
|
|
|
start_ms = self.clock.time_msec()
|
|
|
|
response = await self._send_request(
|
|
request,
|
|
long_retries=long_retries,
|
|
timeout=timeout,
|
|
ignore_backoff=ignore_backoff,
|
|
)
|
|
|
|
if timeout:
|
|
_sec_timeout = timeout / 1000
|
|
else:
|
|
_sec_timeout = self.default_timeout
|
|
|
|
body = await _handle_json_response(
|
|
self.reactor, _sec_timeout, request, response, start_ms,
|
|
)
|
|
return body
|
|
|
|
async def get_json(
|
|
self,
|
|
destination,
|
|
path,
|
|
args=None,
|
|
retry_on_dns_fail=True,
|
|
timeout=None,
|
|
ignore_backoff=False,
|
|
try_trailing_slash_on_400=False,
|
|
):
|
|
""" GETs some json from the given host homeserver and path
|
|
|
|
Args:
|
|
destination (str): The remote server to send the HTTP request
|
|
to.
|
|
|
|
path (str): The HTTP path.
|
|
|
|
args (dict|None): A dictionary used to create query strings, defaults to
|
|
None.
|
|
|
|
timeout (int|None): number of milliseconds to wait for the response.
|
|
self._default_timeout (60s) by default.
|
|
|
|
Note that we may make several attempts to send the request; this
|
|
timeout applies to the time spent waiting for response headers for
|
|
*each* attempt (including connection time) as well as the time spent
|
|
reading the response body after a 200 response.
|
|
|
|
ignore_backoff (bool): true to ignore the historical backoff data
|
|
and try the request anyway.
|
|
|
|
try_trailing_slash_on_400 (bool): True if on a 400 M_UNRECOGNIZED
|
|
response we should try appending a trailing slash to the end of
|
|
the request. Workaround for #3622 in Synapse <= v0.99.3.
|
|
Returns:
|
|
dict|list: Succeeds when we get a 2xx HTTP response. The
|
|
result will be the decoded JSON body.
|
|
|
|
Raises:
|
|
HttpResponseException: If we get an HTTP response code >= 300
|
|
(except 429).
|
|
NotRetryingDestination: If we are not yet ready to retry this
|
|
server.
|
|
FederationDeniedError: If this destination is not on our
|
|
federation whitelist
|
|
RequestSendFailed: If there were problems connecting to the
|
|
remote, due to e.g. DNS failures, connection timeouts etc.
|
|
"""
|
|
request = MatrixFederationRequest(
|
|
method="GET", destination=destination, path=path, query=args
|
|
)
|
|
|
|
start_ms = self.clock.time_msec()
|
|
|
|
response = await self._send_request_with_optional_trailing_slash(
|
|
request,
|
|
try_trailing_slash_on_400,
|
|
backoff_on_404=False,
|
|
ignore_backoff=ignore_backoff,
|
|
retry_on_dns_fail=retry_on_dns_fail,
|
|
timeout=timeout,
|
|
)
|
|
|
|
if timeout is not None:
|
|
_sec_timeout = timeout / 1000
|
|
else:
|
|
_sec_timeout = self.default_timeout
|
|
|
|
body = await _handle_json_response(
|
|
self.reactor, _sec_timeout, request, response, start_ms
|
|
)
|
|
|
|
return body
|
|
|
|
async def delete_json(
|
|
self,
|
|
destination,
|
|
path,
|
|
long_retries=False,
|
|
timeout=None,
|
|
ignore_backoff=False,
|
|
args={},
|
|
):
|
|
"""Send a DELETE request to the remote expecting some json response
|
|
|
|
Args:
|
|
destination (str): The remote server to send the HTTP request
|
|
to.
|
|
path (str): The HTTP path.
|
|
|
|
long_retries (bool): whether to use the long retry algorithm. See
|
|
docs on _send_request for details.
|
|
|
|
timeout (int|None): number of milliseconds to wait for the response.
|
|
self._default_timeout (60s) by default.
|
|
|
|
Note that we may make several attempts to send the request; this
|
|
timeout applies to the time spent waiting for response headers for
|
|
*each* attempt (including connection time) as well as the time spent
|
|
reading the response body after a 200 response.
|
|
|
|
ignore_backoff (bool): true to ignore the historical backoff data and
|
|
try the request anyway.
|
|
|
|
args (dict): query params
|
|
Returns:
|
|
dict|list: Succeeds when we get a 2xx HTTP response. The
|
|
result will be the decoded JSON body.
|
|
|
|
Raises:
|
|
HttpResponseException: If we get an HTTP response code >= 300
|
|
(except 429).
|
|
NotRetryingDestination: If we are not yet ready to retry this
|
|
server.
|
|
FederationDeniedError: If this destination is not on our
|
|
federation whitelist
|
|
RequestSendFailed: If there were problems connecting to the
|
|
remote, due to e.g. DNS failures, connection timeouts etc.
|
|
"""
|
|
request = MatrixFederationRequest(
|
|
method="DELETE", destination=destination, path=path, query=args
|
|
)
|
|
|
|
start_ms = self.clock.time_msec()
|
|
|
|
response = await self._send_request(
|
|
request,
|
|
long_retries=long_retries,
|
|
timeout=timeout,
|
|
ignore_backoff=ignore_backoff,
|
|
)
|
|
|
|
if timeout is not None:
|
|
_sec_timeout = timeout / 1000
|
|
else:
|
|
_sec_timeout = self.default_timeout
|
|
|
|
body = await _handle_json_response(
|
|
self.reactor, _sec_timeout, request, response, start_ms
|
|
)
|
|
return body
|
|
|
|
async def get_file(
|
|
self,
|
|
destination,
|
|
path,
|
|
output_stream,
|
|
args={},
|
|
retry_on_dns_fail=True,
|
|
max_size=None,
|
|
ignore_backoff=False,
|
|
):
|
|
"""GETs a file from a given homeserver
|
|
Args:
|
|
destination (str): The remote server to send the HTTP request to.
|
|
path (str): The HTTP path to GET.
|
|
output_stream (file): File to write the response body to.
|
|
args (dict): Optional dictionary used to create the query string.
|
|
ignore_backoff (bool): true to ignore the historical backoff data
|
|
and try the request anyway.
|
|
|
|
Returns:
|
|
tuple[int, dict]: Resolves with an (int,dict) tuple of
|
|
the file length and a dict of the response headers.
|
|
|
|
Raises:
|
|
HttpResponseException: If we get an HTTP response code >= 300
|
|
(except 429).
|
|
NotRetryingDestination: If we are not yet ready to retry this
|
|
server.
|
|
FederationDeniedError: If this destination is not on our
|
|
federation whitelist
|
|
RequestSendFailed: If there were problems connecting to the
|
|
remote, due to e.g. DNS failures, connection timeouts etc.
|
|
"""
|
|
request = MatrixFederationRequest(
|
|
method="GET", destination=destination, path=path, query=args
|
|
)
|
|
|
|
response = await self._send_request(
|
|
request, retry_on_dns_fail=retry_on_dns_fail, ignore_backoff=ignore_backoff
|
|
)
|
|
|
|
headers = dict(response.headers.getAllRawHeaders())
|
|
|
|
try:
|
|
d = _readBodyToFile(response, output_stream, max_size)
|
|
d.addTimeout(self.default_timeout, self.reactor)
|
|
length = await make_deferred_yieldable(d)
|
|
except Exception as e:
|
|
logger.warning(
|
|
"{%s} [%s] Error reading response: %s",
|
|
request.txn_id,
|
|
request.destination,
|
|
e,
|
|
)
|
|
raise
|
|
logger.info(
|
|
"{%s} [%s] Completed: %d %s [%d bytes] %s %s",
|
|
request.txn_id,
|
|
request.destination,
|
|
response.code,
|
|
response.phrase.decode("ascii", errors="replace"),
|
|
length,
|
|
request.method,
|
|
request.uri.decode("ascii"),
|
|
)
|
|
return (length, headers)
|
|
|
|
|
|
class _ReadBodyToFileProtocol(protocol.Protocol):
|
|
def __init__(self, stream, deferred, max_size):
|
|
self.stream = stream
|
|
self.deferred = deferred
|
|
self.length = 0
|
|
self.max_size = max_size
|
|
|
|
def dataReceived(self, data):
|
|
self.stream.write(data)
|
|
self.length += len(data)
|
|
if self.max_size is not None and self.length >= self.max_size:
|
|
self.deferred.errback(
|
|
SynapseError(
|
|
502,
|
|
"Requested file is too large > %r bytes" % (self.max_size,),
|
|
Codes.TOO_LARGE,
|
|
)
|
|
)
|
|
self.deferred = defer.Deferred()
|
|
self.transport.loseConnection()
|
|
|
|
def connectionLost(self, reason):
|
|
if reason.check(ResponseDone):
|
|
self.deferred.callback(self.length)
|
|
else:
|
|
self.deferred.errback(reason)
|
|
|
|
|
|
def _readBodyToFile(response, stream, max_size):
|
|
d = defer.Deferred()
|
|
response.deliverBody(_ReadBodyToFileProtocol(stream, d, max_size))
|
|
return d
|
|
|
|
|
|
def _flatten_response_never_received(e):
|
|
if hasattr(e, "reasons"):
|
|
reasons = ", ".join(
|
|
_flatten_response_never_received(f.value) for f in e.reasons
|
|
)
|
|
|
|
return "%s:[%s]" % (type(e).__name__, reasons)
|
|
else:
|
|
return repr(e)
|
|
|
|
|
|
def check_content_type_is_json(headers):
|
|
"""
|
|
Check that a set of HTTP headers have a Content-Type header, and that it
|
|
is application/json.
|
|
|
|
Args:
|
|
headers (twisted.web.http_headers.Headers): headers to check
|
|
|
|
Raises:
|
|
RequestSendFailed: if the Content-Type header is missing or isn't JSON
|
|
|
|
"""
|
|
c_type = headers.getRawHeaders(b"Content-Type")
|
|
if c_type is None:
|
|
raise RequestSendFailed(RuntimeError("No Content-Type header"), can_retry=False)
|
|
|
|
c_type = c_type[0].decode("ascii") # only the first header
|
|
val, options = cgi.parse_header(c_type)
|
|
if val != "application/json":
|
|
raise RequestSendFailed(
|
|
RuntimeError("Content-Type not application/json: was '%s'" % c_type),
|
|
can_retry=False,
|
|
)
|
|
|
|
|
|
def encode_query_args(args):
|
|
if args is None:
|
|
return b""
|
|
|
|
encoded_args = {}
|
|
for k, vs in args.items():
|
|
if isinstance(vs, str):
|
|
vs = [vs]
|
|
encoded_args[k] = [v.encode("UTF-8") for v in vs]
|
|
|
|
query_bytes = urllib.parse.urlencode(encoded_args, True)
|
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return query_bytes.encode("utf8")
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