Decode headers as UTF-8 also in ASGI

sanic/http/http1.py

@@ -202,7 +202,7 @@ async def http1_request_header(self):  # no cov
         # Parse header content
         try:
             head = buf[:pos]
-            raw_headers = head.decode(errors="surrogateescape")
+            raw_headers = head.decode("latin-1", errors="surrogateescape")
             reqline, *split_headers = raw_headers.split("\r\n")
             method, self.url, protocol = reqline.split(" ")
 

sanic/http/http3.py

@@ -333,7 +333,12 @@ def get_receiver_by_stream_id(self, stream_id: int) -> Receiver:
         return self.receivers[stream_id]
 
     def _make_request(self, event: HeadersReceived) -> Request:
-        headers = Header(((k.decode(), v.decode()) for k, v in event.headers))
+        headers = Header(
+            (
+                (k.decode("latin-1"), v.decode("latin-1"))
+                for k, v in event.headers
+            )
+        )
         method = headers[":method"]
         path = headers[":path"]
         scheme = headers.pop(":scheme", "")

tests/test_app.py

@@ -349,11 +349,11 @@ def test_get_app_does_not_exist():
     with pytest.raises(
         SanicException,
         match="Sanic app name 'does-not-exist' not found.\n"
-            "App instantiation must occur outside "
-            "if __name__ == '__main__' "
-            "block or by using an AppLoader.\nSee "
-            "https://sanic.dev/en/guide/deployment/app-loader.html"
-            " for more details."
+        "App instantiation must occur outside "
+        "if __name__ == '__main__' "
+        "block or by using an AppLoader.\nSee "
+        "https://sanic.dev/en/guide/deployment/app-loader.html"
+        " for more details.",
     ):
         Sanic.get_app("does-not-exist")