webhooks: Convert non-body payload webhooks to use @typed_endpoint.

These webhooks do not use argument_type_is_body, so they are parsing the
payload from a query parameter directly into WildValue.

zerver/webhooks/hellosign/view.py

@@ -1,11 +1,13 @@
 from typing import Dict, List
 
 from django.http import HttpRequest, HttpResponse
+from pydantic import Json
+from typing_extensions import Annotated
 
 from zerver.decorator import webhook_view
-from zerver.lib.request import REQ, has_request_variables
 from zerver.lib.response import json_success
-from zerver.lib.validator import WildValue, check_string, to_wild_value
+from zerver.lib.typed_endpoint import ApiParamConfig, typed_endpoint
+from zerver.lib.validator import WildValue, check_string
 from zerver.lib.webhooks.common import check_send_webhook_message
 from zerver.models import UserProfile
 
@@ -56,11 +58,12 @@ def get_recipients_text(recipients: List[str]) -> str:
 
 
 @webhook_view("HelloSign")
-@has_request_variables
+@typed_endpoint
 def api_hellosign_webhook(
     request: HttpRequest,
     user_profile: UserProfile,
-    payload: WildValue = REQ(whence="json", converter=to_wild_value),
+    *,
+    payload: Annotated[Json[WildValue], ApiParamConfig("json")],
 ) -> HttpResponse:
     if "signature_request" in payload:
         body = get_message_body(payload)

zerver/webhooks/papertrail/view.py

@@ -1,11 +1,12 @@
 from django.http import HttpRequest, HttpResponse
 from django.utils.translation import gettext as _
+from pydantic import Json
 
 from zerver.decorator import webhook_view
 from zerver.lib.exceptions import JsonableError
-from zerver.lib.request import REQ, has_request_variables
 from zerver.lib.response import json_success
-from zerver.lib.validator import WildValue, check_string, to_wild_value
+from zerver.lib.typed_endpoint import typed_endpoint
+from zerver.lib.validator import WildValue, check_string
 from zerver.lib.webhooks.common import check_send_webhook_message
 from zerver.models import UserProfile
 
@@ -19,11 +20,12 @@ SEARCH_TEMPLATE = """
 
 
 @webhook_view("Papertrail")
-@has_request_variables
+@typed_endpoint
 def api_papertrail_webhook(
     request: HttpRequest,
     user_profile: UserProfile,
-    payload: WildValue = REQ(converter=to_wild_value),
+    *,
+    payload: Json[WildValue],
 ) -> HttpResponse:
     if "events" not in payload:
         raise JsonableError(_("Events key is missing from payload"))