<title>WebSocket is not subject to HTTP(S) connection limit</title> <script> var protocol = location.protocol.replace('http', 'ws'); var url = protocol + '//' + location.host + '/echo-with-no-extension'; // TODO(ricea): The limit for ws: is 255, but wss: gets a limit of 30 // (per-host:port, not ip:port!) because it still uses the HTTP pool code. This // should be fixed at some point. When it is, change this number back to 50 (or // even larger, if it works). var socketCount = 30; var connected = 0; for (i = 0; i < socketCount; ++i) { var ws = new WebSocket(url); ws.onopen = function() { ++connected; if (connected == socketCount) { document.title = "PASS"; } }; ws.onclose = function() { document.title = "FAIL"; }; } setTimeout(function() { console.log("Got stuck after " + connected + " socket(s) connected"); document.title = "FAIL"; }, 5000); </script>