diff options
Diffstat (limited to 'synapse/http/matrixfederationclient.py')
| -rw-r--r-- | synapse/http/matrixfederationclient.py | 403 |
1 files changed, 249 insertions, 154 deletions
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py index 13b19f76..14b12cd1 100644 --- a/synapse/http/matrixfederationclient.py +++ b/synapse/http/matrixfederationclient.py @@ -17,10 +17,12 @@ import cgi import logging import random import sys +from io import BytesIO from six import PY3, string_types from six.moves import urllib +import attr import treq from canonicaljson import encode_canonical_json from prometheus_client import Counter @@ -28,8 +30,9 @@ from signedjson.sign import sign_json from twisted.internet import defer, protocol from twisted.internet.error import DNSLookupError +from twisted.internet.task import _EPSILON, Cooperator from twisted.web._newclient import ResponseDone -from twisted.web.client import Agent, HTTPConnectionPool +from twisted.web.client import Agent, FileBodyProducer, HTTPConnectionPool from twisted.web.http_headers import Headers import synapse.metrics @@ -41,13 +44,11 @@ from synapse.api.errors import ( SynapseError, ) from synapse.http.endpoint import matrix_federation_endpoint -from synapse.util import logcontext -from synapse.util.async_helpers import timeout_no_seriously +from synapse.util.async_helpers import timeout_deferred from synapse.util.logcontext import make_deferred_yieldable from synapse.util.metrics import Measure logger = logging.getLogger(__name__) -outbound_logger = logging.getLogger("synapse.http.outbound") outgoing_requests_counter = Counter("synapse_http_matrixfederationclient_requests", "", ["method"]) @@ -78,6 +79,99 @@ class MatrixFederationEndpointFactory(object): ) +_next_id = 1 + + +@attr.s +class MatrixFederationRequest(object): + method = attr.ib() + """HTTP method + :type: str + """ + + path = attr.ib() + """HTTP path + :type: str + """ + + destination = attr.ib() + """The remote server to send the HTTP request to. + :type: str""" + + json = attr.ib(default=None) + """JSON to send in the body. + :type: dict|None + """ + + json_callback = attr.ib(default=None) + """A callback to generate the JSON. + :type: func|None + """ + + query = attr.ib(default=None) + """Query arguments. + :type: dict|None + """ + + txn_id = attr.ib(default=None) + """Unique ID for this request (for logging) + :type: str|None + """ + + def __attrs_post_init__(self): + global _next_id + self.txn_id = "%s-O-%s" % (self.method, _next_id) + _next_id = (_next_id + 1) % (MAXINT - 1) + + def get_json(self): + if self.json_callback: + return self.json_callback() + return self.json + + +@defer.inlineCallbacks +def _handle_json_response(reactor, timeout_sec, request, response): + """ + Reads the JSON body of a response, with a timeout + + Args: + reactor (IReactor): twisted reactor, for the timeout + timeout_sec (float): number of seconds to wait for response to complete + request (MatrixFederationRequest): the request that triggered the response + response (IResponse): response to the request + + Returns: + dict: parsed JSON response + """ + try: + check_content_type_is_json(response.headers) + + d = treq.json_content(response) + d = timeout_deferred( + d, + timeout=timeout_sec, + reactor=reactor, + ) + + body = yield make_deferred_yieldable(d) + except Exception as e: + logger.warn( + "{%s} [%s] Error reading response: %s", + request.txn_id, + request.destination, + e, + ) + raise + logger.info( + "{%s} [%s] Completed: %d %s", + request.txn_id, + request.destination, + response.code, + response.phrase.decode('ascii', errors='replace'), + ) + defer.returnValue(body) + + class MatrixFederationHttpClient(object): """HTTP client used to talk to other homeservers over the federation protocol. Send client certificates and signs requests. @@ -102,34 +196,35 @@ class MatrixFederationHttpClient(object): self.clock = hs.get_clock() self._store = hs.get_datastore() self.version_string = hs.version_string.encode('ascii') - self._next_id = 1 self.default_timeout = 60 - def _create_url(self, destination, path_bytes, param_bytes, query_bytes): - return urllib.parse.urlunparse( - (b"matrix", destination, path_bytes, param_bytes, query_bytes, b"") - ) + def schedule(x): + reactor.callLater(_EPSILON, x) + + self._cooperator = Cooperator(scheduler=schedule) @defer.inlineCallbacks - def _request(self, destination, method, path, - json=None, json_callback=None, - param_bytes=b"", - query=None, retry_on_dns_fail=True, - timeout=None, long_retries=False, - ignore_backoff=False, - backoff_on_404=False): + def _send_request( + self, + request, + retry_on_dns_fail=True, + timeout=None, + long_retries=False, + ignore_backoff=False, + backoff_on_404=False + ): """ - Creates and sends a request to the given server. + Sends a request to the given server. Args: - destination (str): The remote server to send the HTTP request to. - method (str): HTTP method - path (str): The HTTP path - json (dict or None): JSON to send in the body. - json_callback (func or None): A callback to generate the JSON. - query (dict or None): Query arguments. + request (MatrixFederationRequest): details of request to be sent + + timeout (int|None): number of milliseconds to wait for the response headers + (including connecting to the server). 60s by default. + ignore_backoff (bool): true to ignore the historical backoff data and try the request anyway. + backoff_on_404 (bool): Back off if we get a 404 Returns: @@ -154,38 +249,32 @@ class MatrixFederationHttpClient(object): if ( self.hs.config.federation_domain_whitelist is not None and - destination not in self.hs.config.federation_domain_whitelist + request.destination not in self.hs.config.federation_domain_whitelist ): - raise FederationDeniedError(destination) + raise FederationDeniedError(request.destination) limiter = yield synapse.util.retryutils.get_retry_limiter( - destination, + request.destination, self.clock, self._store, backoff_on_404=backoff_on_404, ignore_backoff=ignore_backoff, ) - headers_dict = {} - path_bytes = path.encode("ascii") - if query: - query_bytes = encode_query_args(query) + method = request.method + destination = request.destination + path_bytes = request.path.encode("ascii") + if request.query: + query_bytes = encode_query_args(request.query) else: query_bytes = b"" headers_dict = { "User-Agent": [self.version_string], - "Host": [destination], + "Host": [request.destination], } with limiter: - url = self._create_url( - destination.encode("ascii"), path_bytes, param_bytes, query_bytes - ).decode('ascii') - - txn_id = "%s-O-%s" % (method, self._next_id) - self._next_id = (self._next_id + 1) % (MAXINT - 1) - # XXX: Would be much nicer to retry only at the transaction-layer # (once we have reliable transactions in place) if long_retries: @@ -193,16 +282,19 @@ class MatrixFederationHttpClient(object): else: retries_left = MAX_SHORT_RETRIES - http_url = urllib.parse.urlunparse( - (b"", b"", path_bytes, param_bytes, query_bytes, b"") - ).decode('ascii') + url = urllib.parse.urlunparse(( + b"matrix", destination.encode("ascii"), + path_bytes, None, query_bytes, b"", + )).decode('ascii') + + http_url = urllib.parse.urlunparse(( + b"", b"", + path_bytes, None, query_bytes, b"", + )).decode('ascii') - log_result = None while True: try: - if json_callback: - json = json_callback() - + json = request.get_json() if json: data = encode_canonical_json(json) headers_dict["Content-Type"] = ["application/json"] @@ -213,29 +305,32 @@ class MatrixFederationHttpClient(object): data = None self.sign_request(destination, method, http_url, headers_dict) - outbound_logger.info( + logger.info( "{%s} [%s] Sending request: %s %s", - txn_id, destination, method, url + request.txn_id, destination, method, url ) + if data: + producer = FileBodyProducer( + BytesIO(data), + cooperator=self._cooperator + ) + else: + producer = None + request_deferred = treq.request( method, url, headers=Headers(headers_dict), - data=data, + data=producer, agent=self.agent, reactor=self.hs.get_reactor(), unbuffered=True ) - request_deferred.addTimeout(_sec_timeout, self.hs.get_reactor()) - # Sometimes the timeout above doesn't work, so lets hack yet - # another layer of timeouts in in the vain hope that at some - # point the world made sense and this really really really - # should work. - request_deferred = timeout_no_seriously( + request_deferred = timeout_deferred( request_deferred, - timeout=_sec_timeout * 2, + timeout=_sec_timeout, reactor=self.hs.get_reactor(), ) @@ -244,30 +339,19 @@ class MatrixFederationHttpClient(object): request_deferred, ) - log_result = "%d %s" % (response.code, response.phrase,) break except Exception as e: - if not retry_on_dns_fail and isinstance(e, DNSLookupError): - logger.warn( - "DNS Lookup failed to %s with %s", - destination, - e - ) - log_result = "DNS Lookup failed to %s with %s" % ( - destination, e - ) - raise - logger.warn( - "{%s} Sending request failed to %s: %s %s: %s", - txn_id, + "{%s} [%s] Request failed: %s %s: %s", + request.txn_id, destination, method, url, _flatten_response_never_received(e), ) - log_result = _flatten_response_never_received(e) + if not retry_on_dns_fail and isinstance(e, DNSLookupError): + raise if retries_left and not timeout: if long_retries: @@ -280,33 +364,37 @@ class MatrixFederationHttpClient(object): delay *= random.uniform(0.8, 1.4) logger.debug( - "{%s} Waiting %s before sending to %s...", - txn_id, + "{%s} [%s] Waiting %ss before re-sending...", + request.txn_id, + destination, delay, - destination ) yield self.clock.sleep(delay) retries_left -= 1 else: raise - finally: - outbound_logger.info( - "{%s} [%s] Result: %s", - txn_id, - destination, - log_result, - ) + + logger.info( + "{%s} [%s] Got response headers: %d %s", + request.txn_id, + destination, + response.code, + response.phrase.decode('ascii', errors='replace'), + ) if 200 <= response.code < 300: pass else: # :'( # Update transactions table? - with logcontext.PreserveLoggingContext(): - d = treq.content(response) - d.addTimeout(_sec_timeout, self.hs.get_reactor()) - body = yield make_deferred_yieldable(d) + d = treq.content(response) + d = timeout_deferred( + d, + timeout=_sec_timeout, + reactor=self.hs.get_reactor(), + ) + body = yield make_deferred_yieldable(d) raise HttpResponseException( response.code, response.phrase, body ) @@ -400,29 +488,26 @@ class MatrixFederationHttpClient(object): is not on our federation whitelist """ - if not json_data_callback: - json_data_callback = lambda: data - - response = yield self._request( - destination, - "PUT", - path, - json_callback=json_data_callback, + request = MatrixFederationRequest( + method="PUT", + destination=destination, + path=path, query=args, + json_callback=json_data_callback, + json=data, + ) + + response = yield self._send_request( + request, long_retries=long_retries, timeout=timeout, ignore_backoff=ignore_backoff, backoff_on_404=backoff_on_404, ) - if 200 <= response.code < 300: - # We need to update the transactions table to say it was sent? - check_content_type_is_json(response.headers) - - with logcontext.PreserveLoggingContext(): - d = treq.json_content(response) - d.addTimeout(self.default_timeout, self.hs.get_reactor()) - body = yield make_deferred_yieldable(d) + body = yield _handle_json_response( + self.hs.get_reactor(), self.default_timeout, request, response, + ) defer.returnValue(body) @defer.inlineCallbacks @@ -456,31 +541,30 @@ class MatrixFederationHttpClient(object): Fails with ``FederationDeniedError`` if this destination is not on our federation whitelist """ - response = yield self._request( - destination, - "POST", - path, + + request = MatrixFederationRequest( + method="POST", + destination=destination, + path=path, query=args, json=data, + ) + + response = yield self._send_request( + request, long_retries=long_retries, timeout=timeout, ignore_backoff=ignore_backoff, ) - if 200 <= response.code < 300: - # We need to update the transactions table to say it was sent? - check_content_type_is_json(response.headers) - - with logcontext.PreserveLoggingContext(): - d = treq.json_content(response) - if timeout: - _sec_timeout = timeout / 1000 - else: - _sec_timeout = self.default_timeout - - d.addTimeout(_sec_timeout, self.hs.get_reactor()) - body = yield make_deferred_yieldable(d) + if timeout: + _sec_timeout = timeout / 1000 + else: + _sec_timeout = self.default_timeout + body = yield _handle_json_response( + self.hs.get_reactor(), _sec_timeout, request, response, + ) defer.returnValue(body) @defer.inlineCallbacks @@ -516,25 +600,23 @@ class MatrixFederationHttpClient(object): logger.debug("Query bytes: %s Retry DNS: %s", args, retry_on_dns_fail) - response = yield self._request( - destination, - "GET", - path, + request = MatrixFederationRequest( + method="GET", + destination=destination, + path=path, query=args, + ) + + response = yield self._send_request( + request, retry_on_dns_fail=retry_on_dns_fail, timeout=timeout, ignore_backoff=ignore_backoff, ) - if 200 <= response.code < 300: - # We need to update the transactions table to say it was sent? - check_content_type_is_json(response.headers) - - with logcontext.PreserveLoggingContext(): - d = treq.json_content(response) - d.addTimeout(self.default_timeout, self.hs.get_reactor()) - body = yield make_deferred_yieldable(d) - + body = yield _handle_json_response( + self.hs.get_reactor(), self.default_timeout, request, response, + ) defer.returnValue(body) @defer.inlineCallbacks @@ -565,25 +647,23 @@ class MatrixFederationHttpClient(object): Fails with ``FederationDeniedError`` if this destination is not on our federation whitelist """ - response = yield self._request( - destination, - "DELETE", - path, + request = MatrixFederationRequest( + method="DELETE", + destination=destination, + path=path, query=args, + ) + + response = yield self._send_request( + request, long_retries=long_retries, timeout=timeout, ignore_backoff=ignore_backoff, ) - if 200 <= response.code < 300: - # We need to update the transactions table to say it was sent? - check_content_type_is_json(response.headers) - - with logcontext.PreserveLoggingContext(): - d = treq.json_content(response) - d.addTimeout(self.default_timeout, self.hs.get_reactor()) - body = yield make_deferred_yieldable(d) - + body = yield _handle_json_response( + self.hs.get_reactor(), self.default_timeout, request, response, + ) defer.returnValue(body) @defer.inlineCallbacks @@ -611,11 +691,15 @@ class MatrixFederationHttpClient(object): Fails with ``FederationDeniedError`` if this destination is not on our federation whitelist """ - response = yield self._request( - destination, - "GET", - path, + request = MatrixFederationRequest( + method="GET", + destination=destination, + path=path, query=args, + ) + + response = yield self._send_request( + request, retry_on_dns_fail=retry_on_dns_fail, ignore_backoff=ignore_backoff, ) @@ -623,14 +707,25 @@ class MatrixFederationHttpClient(object): headers = dict(response.headers.getAllRawHeaders()) try: - with logcontext.PreserveLoggingContext(): - d = _readBodyToFile(response, output_stream, max_size) - d.addTimeout(self.default_timeout, self.hs.get_reactor()) - length = yield make_deferred_yieldable(d) - except Exception: - logger.exception("Failed to download body") + d = _readBodyToFile(response, output_stream, max_size) + d.addTimeout(self.default_timeout, self.hs.get_reactor()) + length = yield make_deferred_yieldable(d) + except Exception as e: + logger.warn( + "{%s} [%s] Error reading response: %s", + request.txn_id, + request.destination, + e, + ) raise - + logger.info( + "{%s} [%s] Completed: %d %s [%d bytes]", + request.txn_id, + request.destination, + response.code, + response.phrase.decode('ascii', errors='replace'), + length, + ) defer.returnValue((length, headers)) |