update example

examples/common.py

@@ -1,12 +0,0 @@
-from starlette.requests import Request
-
-
-def get_client_ip(request: Request):
-    """
-    :param request:
-    :return:
-    """
-    forwarded = request.headers.get("X-Forwarded-For")
-    if forwarded:
-        return forwarded.split(",")[0]
-    return request.client.host