diff options
Diffstat (limited to 'synapse/http/federation')
| -rw-r--r-- | synapse/http/federation/matrix_federation_agent.py | 10 | ||||
| -rw-r--r-- | synapse/http/federation/srv_resolver.py | 4 | ||||
| -rw-r--r-- | synapse/http/federation/well_known_resolver.py | 66 |
3 files changed, 42 insertions, 38 deletions
diff --git a/synapse/http/federation/matrix_federation_agent.py b/synapse/http/federation/matrix_federation_agent.py index 369bf9c2fc..83d6196d4a 100644 --- a/synapse/http/federation/matrix_federation_agent.py +++ b/synapse/http/federation/matrix_federation_agent.py @@ -36,7 +36,7 @@ logger = logging.getLogger(__name__) @implementer(IAgent) -class MatrixFederationAgent(object): +class MatrixFederationAgent: """An Agent-like thing which provides a `request` method which correctly handles resolving matrix server names when using matrix://. Handles standard https URIs as normal. @@ -134,8 +134,8 @@ class MatrixFederationAgent(object): and not _is_ip_literal(parsed_uri.hostname) and not parsed_uri.port ): - well_known_result = yield self._well_known_resolver.get_well_known( - parsed_uri.hostname + well_known_result = yield defer.ensureDeferred( + self._well_known_resolver.get_well_known(parsed_uri.hostname) ) delegated_server = well_known_result.delegated_server @@ -175,7 +175,7 @@ class MatrixFederationAgent(object): @implementer(IAgentEndpointFactory) -class MatrixHostnameEndpointFactory(object): +class MatrixHostnameEndpointFactory: """Factory for MatrixHostnameEndpoint for parsing to an Agent. """ @@ -198,7 +198,7 @@ class MatrixHostnameEndpointFactory(object): @implementer(IStreamClientEndpoint) -class MatrixHostnameEndpoint(object): +class MatrixHostnameEndpoint: """An endpoint that resolves matrix:// URLs using Matrix server name resolution (i.e. via SRV). Does not check for well-known delegation. diff --git a/synapse/http/federation/srv_resolver.py b/synapse/http/federation/srv_resolver.py index 2ede90a9b1..d9620032d2 100644 --- a/synapse/http/federation/srv_resolver.py +++ b/synapse/http/federation/srv_resolver.py @@ -33,7 +33,7 @@ SERVER_CACHE = {} @attr.s(slots=True, frozen=True) -class Server(object): +class Server: """ Our record of an individual server which can be tried to reach a destination. @@ -96,7 +96,7 @@ def _sort_server_list(server_list): return results -class SrvResolver(object): +class SrvResolver: """Interface to the dns client to do SRV lookups, with result caching. The default resolver in twisted.names doesn't do any caching (it has a CacheResolver, diff --git a/synapse/http/federation/well_known_resolver.py b/synapse/http/federation/well_known_resolver.py index 89a3b041ce..e6f067ca29 100644 --- a/synapse/http/federation/well_known_resolver.py +++ b/synapse/http/federation/well_known_resolver.py @@ -13,10 +13,10 @@ # See the License for the specific language governing permissions and # limitations under the License. -import json import logging import random import time +from typing import Callable, Dict, Optional, Tuple import attr @@ -24,9 +24,10 @@ from twisted.internet import defer from twisted.web.client import RedirectAgent, readBody from twisted.web.http import stringToDatetime from twisted.web.http_headers import Headers +from twisted.web.iweb import IResponse from synapse.logging.context import make_deferred_yieldable -from synapse.util import Clock +from synapse.util import Clock, json_decoder from synapse.util.caches.ttlcache import TTLCache from synapse.util.metrics import Measure @@ -70,11 +71,11 @@ _had_valid_well_known_cache = TTLCache("had-valid-well-known") @attr.s(slots=True, frozen=True) -class WellKnownLookupResult(object): +class WellKnownLookupResult: delegated_server = attr.ib() -class WellKnownResolver(object): +class WellKnownResolver: """Handles well-known lookups for matrix servers. """ @@ -100,15 +101,14 @@ class WellKnownResolver(object): self._well_known_agent = RedirectAgent(agent) self.user_agent = user_agent - @defer.inlineCallbacks - def get_well_known(self, server_name): + async def get_well_known(self, server_name: bytes) -> WellKnownLookupResult: """Attempt to fetch and parse a .well-known file for the given server Args: - server_name (bytes): name of the server, from the requested url + server_name: name of the server, from the requested url Returns: - Deferred[WellKnownLookupResult]: The result of the lookup + The result of the lookup """ try: prev_result, expiry, ttl = self._well_known_cache.get_with_expiry( @@ -125,7 +125,9 @@ class WellKnownResolver(object): # requests for the same server in parallel? try: with Measure(self._clock, "get_well_known"): - result, cache_period = yield self._fetch_well_known(server_name) + result, cache_period = await self._fetch_well_known( + server_name + ) # type: Tuple[Optional[bytes], float] except _FetchWellKnownFailure as e: if prev_result and e.temporary: @@ -154,18 +156,17 @@ class WellKnownResolver(object): return WellKnownLookupResult(delegated_server=result) - @defer.inlineCallbacks - def _fetch_well_known(self, server_name): + async def _fetch_well_known(self, server_name: bytes) -> Tuple[bytes, float]: """Actually fetch and parse a .well-known, without checking the cache Args: - server_name (bytes): name of the server, from the requested url + server_name: name of the server, from the requested url Raises: _FetchWellKnownFailure if we fail to lookup a result Returns: - Deferred[Tuple[bytes,int]]: The lookup result and cache period. + The lookup result and cache period. """ had_valid_well_known = self._had_valid_well_known_cache.get(server_name, False) @@ -173,7 +174,7 @@ class WellKnownResolver(object): # We do this in two steps to differentiate between possibly transient # errors (e.g. can't connect to host, 503 response) and more permenant # errors (such as getting a 404 response). - response, body = yield self._make_well_known_request( + response, body = await self._make_well_known_request( server_name, retry=had_valid_well_known ) @@ -181,7 +182,7 @@ class WellKnownResolver(object): if response.code != 200: raise Exception("Non-200 response %s" % (response.code,)) - parsed_body = json.loads(body.decode("utf-8")) + parsed_body = json_decoder.decode(body.decode("utf-8")) logger.info("Response from .well-known: %s", parsed_body) result = parsed_body["m.server"].encode("ascii") @@ -216,20 +217,20 @@ class WellKnownResolver(object): return result, cache_period - @defer.inlineCallbacks - def _make_well_known_request(self, server_name, retry): + async def _make_well_known_request( + self, server_name: bytes, retry: bool + ) -> Tuple[IResponse, bytes]: """Make the well known request. This will retry the request if requested and it fails (with unable to connect or receives a 5xx error). Args: - server_name (bytes) - retry (bool): Whether to retry the request if it fails. + server_name: name of the server, from the requested url + retry: Whether to retry the request if it fails. Returns: - Deferred[tuple[IResponse, bytes]] Returns the response object and - body. Response may be a non-200 response. + Returns the response object and body. Response may be a non-200 response. """ uri = b"https://%s/.well-known/matrix/server" % (server_name,) uri_str = uri.decode("ascii") @@ -244,12 +245,12 @@ class WellKnownResolver(object): logger.info("Fetching %s", uri_str) try: - response = yield make_deferred_yieldable( + response = await make_deferred_yieldable( self._well_known_agent.request( b"GET", uri, headers=Headers(headers) ) ) - body = yield make_deferred_yieldable(readBody(response)) + body = await make_deferred_yieldable(readBody(response)) if 500 <= response.code < 600: raise Exception("Non-200 response %s" % (response.code,)) @@ -266,21 +267,24 @@ class WellKnownResolver(object): logger.info("Error fetching %s: %s. Retrying", uri_str, e) # Sleep briefly in the hopes that they come back up - yield self._clock.sleep(0.5) + await self._clock.sleep(0.5) -def _cache_period_from_headers(headers, time_now=time.time): +def _cache_period_from_headers( + headers: Headers, time_now: Callable[[], float] = time.time +) -> Optional[float]: cache_controls = _parse_cache_control(headers) if b"no-store" in cache_controls: return 0 if b"max-age" in cache_controls: - try: - max_age = int(cache_controls[b"max-age"]) - return max_age - except ValueError: - pass + max_age = cache_controls[b"max-age"] + if max_age: + try: + return int(max_age) + except ValueError: + pass expires = headers.getRawHeaders(b"expires") if expires is not None: @@ -296,7 +300,7 @@ def _cache_period_from_headers(headers, time_now=time.time): return None -def _parse_cache_control(headers): +def _parse_cache_control(headers: Headers) -> Dict[bytes, Optional[bytes]]: cache_controls = {} for hdr in headers.getRawHeaders(b"cache-control", []): for directive in hdr.split(b","): |