I am trying to configure nginx as reverse proxy that does authentication and
websockets. It proxy-passes request
to apache (/auth/wsgi) for authentication - once that succeeds, it then proxy
passes to the websocked backend,
which is a java based websocket endpoint on tomcat 8.
location /basic/alerting/websocket {
auth_request /auth/wsgi;
proxy_pass http://backend.com:8080/websocket;
proxy_http_version 1.1;
proxy_set_header Upgrade "Websocket";
proxy_set_header Connection "upgrade";
proxy_set_header Host $http_host;
}
The authentication on apache succeeds. However, on the backend tomcat, I get
this error:
12572237 [http-nio-8080-exec-10] ERROR
org.springframework.web.socket.server.support.DefaultHandshakeHandler -
handleWebSocketVersionNotSupported() Handshake failed due to unsupported
WebSocket version: null. Supported versions: [13]
It seems that failure is because the backend is expecting the header
("Sec-WebSocket-Version") which is not getting passed through. I even see in
the nginx logs:
2015/03/17 17:28:12 [debug] 20261#0: *718 http proxy header:
"Sec-WebSocket-Version: 13"
Is there anything I need to do in the nginx config? Very much appreciate your
help.
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