Update jupyter_server_proxy/handlers.py

Co-authored-by: Yuvi Panda <[email protected]>

Author: mahnerak

jupyter_server_proxy/handlers.py

@@ -280,6 +280,9 @@ async def proxy(self, host, port, proxied_path):
                        "See https://jupyter-server-proxy.readthedocs.io/en/latest/arbitrary-ports-hosts.html for info.".format(host=host))
             return
 
+        # Remove hop-by-hop headers that don't necessarily apply to the request we are making
+        # to the backend. See https://github.com/jupyterhub/jupyter-server-proxy/pull/328
+        # for more information
         hop_by_hop_headers = [
             'Proxy-Connection',
             'Keep-Alive',