Add missing type hints to non-client REST servlets. (#10817)

Including admin, consent, key, synapse, and media. All REST servlets
(the synapse.rest module) now require typed method definitions.

synapse/rest/consent/consent_resource.py

@@ -17,17 +17,22 @@ import logging
 from hashlib import sha256
 from http import HTTPStatus
 from os import path
-from typing import Dict, List
+from typing import TYPE_CHECKING, Any, Dict, List
 
 import jinja2
 from jinja2 import TemplateNotFound
 
+from twisted.web.server import Request
+
 from synapse.api.errors import NotFoundError, StoreError, SynapseError
 from synapse.config import ConfigError
 from synapse.http.server import DirectServeHtmlResource, respond_with_html
 from synapse.http.servlet import parse_bytes_from_args, parse_string
 from synapse.types import UserID
 
+if TYPE_CHECKING:
+    from synapse.server import HomeServer
+
 # language to use for the templates. TODO: figure this out from Accept-Language
 TEMPLATE_LANGUAGE = "en"
 
@@ -69,11 +74,7 @@ class ConsentResource(DirectServeHtmlResource):
            against the user.
     """
 
-    def __init__(self, hs):
-        """
-        Args:
-            hs (synapse.server.HomeServer): homeserver
-        """
+    def __init__(self, hs: "HomeServer"):
         super().__init__()
 
         self.hs = hs
@@ -106,18 +107,14 @@ class ConsentResource(DirectServeHtmlResource):
 
         self._hmac_secret = hs.config.form_secret.encode("utf-8")
 
-    async def _async_render_GET(self, request):
-        """
-        Args:
-            request (twisted.web.http.Request):
-        """
+    async def _async_render_GET(self, request: Request) -> None:
         version = parse_string(request, "v", default=self._default_consent_version)
         username = parse_string(request, "u", default="")
         userhmac = None
         has_consented = False
         public_version = username == ""
         if not public_version:
-            args: Dict[bytes, List[bytes]] = request.args
+            args: Dict[bytes, List[bytes]] = request.args  # type: ignore
             userhmac_bytes = parse_bytes_from_args(args, "h", required=True)
 
             self._check_hash(username, userhmac_bytes)
@@ -147,14 +144,10 @@ class ConsentResource(DirectServeHtmlResource):
         except TemplateNotFound:
             raise NotFoundError("Unknown policy version")
 
-    async def _async_render_POST(self, request):
-        """
-        Args:
-            request (twisted.web.http.Request):
-        """
+    async def _async_render_POST(self, request: Request) -> None:
         version = parse_string(request, "v", required=True)
         username = parse_string(request, "u", required=True)
-        args: Dict[bytes, List[bytes]] = request.args
+        args: Dict[bytes, List[bytes]] = request.args  # type: ignore
         userhmac = parse_bytes_from_args(args, "h", required=True)
 
         self._check_hash(username, userhmac)
@@ -177,7 +170,9 @@ class ConsentResource(DirectServeHtmlResource):
         except TemplateNotFound:
             raise NotFoundError("success.html not found")
 
-    def _render_template(self, request, template_name, **template_args):
+    def _render_template(
+        self, request: Request, template_name: str, **template_args: Any
+    ) -> None:
         # get_template checks for ".." so we don't need to worry too much
         # about path traversal here.
         template_html = self._jinja_env.get_template(
@@ -186,11 +181,11 @@ class ConsentResource(DirectServeHtmlResource):
         html = template_html.render(**template_args)
         respond_with_html(request, 200, html)
 
-    def _check_hash(self, userid, userhmac):
+    def _check_hash(self, userid: str, userhmac: bytes) -> None:
         """
         Args:
-            userid (unicode):
-            userhmac (bytes):
+            userid:
+            userhmac:
 
         Raises:
               SynapseError if the hash doesn't match