From 0c3565da4cdbe53646ae0bc737900526a1d3df67 Mon Sep 17 00:00:00 2001 From: Dirk Klimpel <5740567+dklimpel@users.noreply.github.com> Date: Wed, 18 Aug 2021 19:53:20 +0200 Subject: [PATCH] Additional type hints for the proxy agent and SRV resolver modules. (#10608) --- changelog.d/10608.misc | 1 + mypy.ini | 3 ++ synapse/http/additional_resource.py | 13 +++++-- synapse/http/federation/srv_resolver.py | 45 ++++++++++++++----------- synapse/http/proxyagent.py | 4 +-- 5 files changed, 41 insertions(+), 25 deletions(-) create mode 100644 changelog.d/10608.misc diff --git a/changelog.d/10608.misc b/changelog.d/10608.misc new file mode 100644 index 0000000000..875bdd2fd0 --- /dev/null +++ b/changelog.d/10608.misc @@ -0,0 +1 @@ +Improve type hints for the proxy agent and SRV resolver modules. Contributed by @dklimpel. \ No newline at end of file diff --git a/mypy.ini b/mypy.ini index e1b9405daa..107f4de76c 100644 --- a/mypy.ini +++ b/mypy.ini @@ -28,10 +28,13 @@ files = synapse/federation, synapse/groups, synapse/handlers, + synapse/http/additional_resource.py, synapse/http/client.py, synapse/http/federation/matrix_federation_agent.py, + synapse/http/federation/srv_resolver.py, synapse/http/federation/well_known_resolver.py, synapse/http/matrixfederationclient.py, + synapse/http/proxyagent.py, synapse/http/servlet.py, synapse/http/server.py, synapse/http/site.py, diff --git a/synapse/http/additional_resource.py b/synapse/http/additional_resource.py index 55ea97a07f..9a2684aca4 100644 --- a/synapse/http/additional_resource.py +++ b/synapse/http/additional_resource.py @@ -12,8 +12,15 @@ # See the License for the specific language governing permissions and # limitations under the License. +from typing import TYPE_CHECKING + +from twisted.web.server import Request + from synapse.http.server import DirectServeJsonResource +if TYPE_CHECKING: + from synapse.server import HomeServer + class AdditionalResource(DirectServeJsonResource): """Resource wrapper for additional_resources @@ -25,7 +32,7 @@ class AdditionalResource(DirectServeJsonResource): and exception handling. """ - def __init__(self, hs, handler): + def __init__(self, hs: "HomeServer", handler): """Initialise AdditionalResource The ``handler`` should return a deferred which completes when it has @@ -33,14 +40,14 @@ class AdditionalResource(DirectServeJsonResource): ``request.write()``, and call ``request.finish()``. Args: - hs (synapse.server.HomeServer): homeserver + hs: homeserver handler ((twisted.web.server.Request) -> twisted.internet.defer.Deferred): function to be called to handle the request. """ super().__init__() self._handler = handler - def _async_render(self, request): + def _async_render(self, request: Request): # Cheekily pass the result straight through, so we don't need to worry # if its an awaitable or not. return self._handler(request) diff --git a/synapse/http/federation/srv_resolver.py b/synapse/http/federation/srv_resolver.py index b8ed4ec905..f68646fd0d 100644 --- a/synapse/http/federation/srv_resolver.py +++ b/synapse/http/federation/srv_resolver.py @@ -16,7 +16,7 @@ import logging import random import time -from typing import List +from typing import Callable, Dict, List import attr @@ -28,35 +28,35 @@ from synapse.logging.context import make_deferred_yieldable logger = logging.getLogger(__name__) -SERVER_CACHE = {} +SERVER_CACHE: Dict[bytes, List["Server"]] = {} -@attr.s(slots=True, frozen=True) +@attr.s(auto_attribs=True, slots=True, frozen=True) class Server: """ Our record of an individual server which can be tried to reach a destination. Attributes: - host (bytes): target hostname - port (int): - priority (int): - weight (int): - expires (int): when the cache should expire this record - in *seconds* since + host: target hostname + port: + priority: + weight: + expires: when the cache should expire this record - in *seconds* since the epoch """ - host = attr.ib() - port = attr.ib() - priority = attr.ib(default=0) - weight = attr.ib(default=0) - expires = attr.ib(default=0) + host: bytes + port: int + priority: int = 0 + weight: int = 0 + expires: int = 0 -def _sort_server_list(server_list): +def _sort_server_list(server_list: List[Server]) -> List[Server]: """Given a list of SRV records sort them into priority order and shuffle each priority with the given weight. """ - priority_map = {} + priority_map: Dict[int, List[Server]] = {} for server in server_list: priority_map.setdefault(server.priority, []).append(server) @@ -103,11 +103,16 @@ class SrvResolver: Args: dns_client (twisted.internet.interfaces.IResolver): twisted resolver impl - cache (dict): cache object - get_time (callable): clock implementation. Should return seconds since the epoch + cache: cache object + get_time: clock implementation. Should return seconds since the epoch """ - def __init__(self, dns_client=client, cache=SERVER_CACHE, get_time=time.time): + def __init__( + self, + dns_client=client, + cache: Dict[bytes, List[Server]] = SERVER_CACHE, + get_time: Callable[[], float] = time.time, + ): self._dns_client = dns_client self._cache = cache self._get_time = get_time @@ -116,7 +121,7 @@ class SrvResolver: """Look up a SRV record Args: - service_name (bytes): record to look up + service_name: record to look up Returns: a list of the SRV records, or an empty list if none found @@ -158,7 +163,7 @@ class SrvResolver: and answers[0].payload and answers[0].payload.target == dns.Name(b".") ): - raise ConnectError("Service %s unavailable" % service_name) + raise ConnectError(f"Service {service_name!r} unavailable") servers = [] diff --git a/synapse/http/proxyagent.py b/synapse/http/proxyagent.py index a3f31452d0..6fd88bde20 100644 --- a/synapse/http/proxyagent.py +++ b/synapse/http/proxyagent.py @@ -173,7 +173,7 @@ class ProxyAgent(_AgentBase): raise ValueError(f"Invalid URI {uri!r}") parsed_uri = URI.fromBytes(uri) - pool_key = (parsed_uri.scheme, parsed_uri.host, parsed_uri.port) + pool_key = f"{parsed_uri.scheme!r}{parsed_uri.host!r}{parsed_uri.port}" request_path = parsed_uri.originForm should_skip_proxy = False @@ -199,7 +199,7 @@ class ProxyAgent(_AgentBase): ) # Cache *all* connections under the same key, since we are only # connecting to a single destination, the proxy: - pool_key = ("http-proxy", self.http_proxy_endpoint) + pool_key = "http-proxy" endpoint = self.http_proxy_endpoint request_path = uri elif (