The websocket library I rely on (PHP-Websockets) does not yet support secure sockets (wss). My website is served over https though, so I cannot use insecure ws connections.

I'm trying to use Apache's mod_proxy to forward the secure request that comes from the browser on to the client.


var ws = new Websocket('wss://example.com/_ws_/');

Apache VirtualHosts

ProxyPass        "/_ws_/" "ws://"
ProxyPassReverse "/_ws_/" "ws://"
# I've also tried "/_ws_/" "ws://example.com:8080/"  Same error below

Upon trying to connect, the browser receives a 500 Server Error. The logs show:

No protocol handler was valid for the URL /_ws_/. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.

I've confirmed that if I remove the proxy rules, stop redirecting users to https and try to connect to insecure sockets from the browser: new Websocket('ws://example.com/'), things work just fine.

My loaded Apache modules include mod_ssl.c, mod_proxy.c and mod_proxy_http.c

Apache 2.4


To get things to work, I also needed to load mod_proxy_wstunnel

Once I did, this ruleset got things working: (in the VirtualHost of the domain that receives and proxies the websocket request)

<IfModule mod_proxy.c>
    ProxyPass "/_ws_/" "ws://"
    ProxyPassReverse "/_ws_/" "ws://"

The browser can then contact the backend WS server through the HTTPS port:

var ws = new Websocket('wss://example.com/_ws_/');
  • How should this be applied if the socket url is of this format? ws:// Mar 24 at 22:30

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