I am intend to write an Nginx module which support downstream message push through http2 protocol. The main process is as below. 1. Client connect to Nginx and use http2 protocol to send a long polling request stream. 2. Nginx hold this long polling request stream and wait downstream messages. 3. If a message arrival, Nginx could send a push promise through the long polling stream and put thby Cubic - Nginx Mailing List - English