Proxy: support for connection upgrade (101 Switching Protocols).
This allows to proxy WebSockets by using configuration like this:
location /chat/ {
proxy_pass http://backend;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
Connection upgrade is allowed as long as it was requested by a client
via the Upgrade request header.
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index ce47a9e..a623adc 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1474,6 +1474,14 @@
u->keepalive = !u->headers_in.connection_close;
}
+ if (u->headers_in.status_n == NGX_HTTP_SWITCHING_PROTOCOLS) {
+ u->keepalive = 0;
+
+ if (r->headers_in.upgrade) {
+ u->upgrade = 1;
+ }
+ }
+
return NGX_OK;
}
