net/data/websocket/multiple-connections.html

   1 <title>WebSocket is not subject to HTTP(S) connection limit</title>
   2 <script>
   3 var protocol = location.protocol.replace('http', 'ws');
   4 var url = protocol + '//' + location.host + '/echo-with-no-extension';
   5
   6 // TODO(ricea): The limit for ws: is 255, but wss: gets a limit of 30
   7 // (per-host:port, not ip:port!) because it still uses the HTTP pool code. This
   8 // should be fixed at some point. When it is, change this number back to 50 (or
   9 // even larger, if it works).
  10 const SOCKETS_TO_OPEN = 30;
  11
  12 // PARALLELISM limits the number of connections we try to open simultaneously.
  13 // This avoids triggering the throttling added in http://crrev.com/972963002,
  14 // which otherwise slows the test down considerably.
  15 const PARALLELISM = 2;
  16
  17 var created = 0;
  18 var connected = 0;
  19
  20 function createNewWebSocket()
  21 {
  22   var ws = new WebSocket(url);
  23   ++created;
  24
  25   ws.onopen = function() {
  26     if (created < SOCKETS_TO_OPEN) {
  27       createNewWebSocket();
  28     }
  29     ++connected;
  30     if (connected == SOCKETS_TO_OPEN) {
  31       document.title = "PASS";
  32     }
  33   };
  34   ws.onclose = function() {
  35     document.title = "FAIL";
  36   };
  37 }
  38
  39 for (var i = 0; i < PARALLELISM; ++i) {
  40   createNewWebSocket();
  41 }
  42
  43 setTimeout(function() {
  44   console.log("Got stuck after " + connected + " socket(s) connected");
  45   document.title = "FAIL";
  46 }, 5000);
  47 </script>