6.5. Server Push Settings

CUBA applications use server push technology in the Background Tasks mechanism. It may require an additional setup of the application and proxy server (if any).

By default, server push uses the WebSocket protocol. The following application properties affect the platform server push functionality:

cuba.web.pushLongPolling

cuba.web.pushEnabled

If users connect to the application server via a proxy that does not support WebSocket, set cuba.web.pushLongPolling to true and increase proxy request timeout to 10 minutes or more.

Below is an example of the Nginx web server settings for using WebSocket:

location / {
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_read_timeout     3600;
    proxy_connect_timeout  240;
    proxy_set_header Host $host;
    proxy_set_header X-RealIP $remote_addr;

    proxy_pass http://127.0.0.1:8080/;
    proxy_set_header X-Forwarded-Proto $scheme;

    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
}