third_party/WebKit/ManualTests/eventsource/eventsource-loader-buffering.html

   1 <!doctype html>
   2 <html>
   3 <head>
   4 <title>EventSource Loader Buffering</title>
   5 <script>
   6 window.onload = function () {
   7     setTimeout(test_es, 500);
   8 };
   9
  10 function test_es() {
  11     var len = 0;
  12     var count = 0;
  13     var step = 1000;
  14     var es = new EventSource("eventsource-loader-buffering.php");
  15     es.onopen = function () {
  16         log("got 'open' event");
  17         log("waiting for the first " + step + " 'message' events");
  18     };
  19     es.onmessage = function (evt) {
  20         len += evt.data.length;
  21         if (++count % step)
  22             return;
  23         log("got " + count + " 'message' events (" + len + " characters)", 1);
  24         if (len >= 1e9)
  25             end();
  26     };
  27     es.onerror = function () {
  28         log("got 'error' event");
  29         end();
  30     };
  31     function end() {
  32         if (es.readyState != es.CLOSED)
  33             es.close();
  34         log("ENDED");
  35     };
  36 }
  37
  38 function log(message, updateLast) {
  39     if (!log.list)
  40         log.list = document.getElementById("log");
  41     var text = document.createTextNode(message);
  42     if (updateLast)
  43         log.list.lastChild.replaceChild(text, log.list.lastChild.firstChild);
  44     else
  45         log.list.appendChild(document.createElement("li")).appendChild(text);
  46 }
  47 </script>
  48 </head>
  49 <body>
  50 <p>Manual test to verify that the EventSource loader does not buffer data (may result in memory growth with long lived connections). Monitor memory usage; it should be stable. This file has to be served from the same web server as the php script with the same name.</p>
  51 <ul id="log" style="list-style-type: none"></ul>
  52 </body>
  53 </html>
  54