ProxyPass /some/path http://localhost:9096
ProxyPassReverse /some/path http://localhost:9096

var socketUrl = 'http://localhost:8888/some/path/namespace';
var socket = io.connect(socketUrl);

http://localhost:8888/some/path/socket.io/socket.io.js
-> 200 ok

localhost:8888/socket.io/1?123983759
-> 404 not found

var socket = io.connect('http://localhost:8888', {resource: '/some/path/socket.io'});