Always show server location in ASGI (#2522)

Co-authored-by: Adam Hopkins <adam@amhopkins.com>
Co-authored-by: Zhiwei Liang <zhi.wei.liang@outlook.com>
Co-authored-by: Néstor Pérez <25409753+prryplatypus@users.noreply.github.com>

sanic/app.py

@@ -1315,7 +1315,7 @@ class Sanic(BaseSanic, RunnerMixin, metaclass=TouchUpMeta):
         self.config.update_config(config)
 
     @property
-    def asgi(self):
+    def asgi(self) -> bool:
         return self.state.asgi
 
     @asgi.setter

sanic/mixins/runner.py

@@ -525,7 +525,7 @@ class RunnerMixin(metaclass=SanicMeta):
                     )
                 )
             else:
-                server = ""
+                server = "ASGI" if self.asgi else "unknown"  # type: ignore
 
             display = {
                 "mode": " ".join(mode),
@@ -571,8 +571,12 @@ class RunnerMixin(metaclass=SanicMeta):
 
     @property
     def serve_location(self) -> str:
+        try:
             server_settings = self.state.server_info[0].settings
             return self.get_server_location(server_settings)
+        except IndexError:
+            location = "ASGI" if self.asgi else "unknown"  # type: ignore
+            return f"http://<{location}>"
 
     @staticmethod
     def get_server_location(

tests/test_asgi.py

@@ -546,3 +546,13 @@ async def test_signals_triggered(app):
     assert response.status_code == 200
     assert response.text == "test_signals_triggered"
     assert signals_triggered == signals_expected
+
+
+@pytest.mark.asyncio
+async def test_asgi_serve_location(app):
+    @app.get("/")
+    def _request(request: Request):
+        return text(request.app.serve_location)
+
+    _, response = await app.asgi_client.get("/")
+    assert response.text == "http://<ASGI>"