web/xynt/xynt-http-streaming.js

   1 function http_streaming(doc, cons)
   2 {
   3     this.console = cons;
   4     this.doc = doc;
   5     this.keepalive_old = -1;
   6     this.keepalive_new = -1;
   7     this.keepalives_equal = 0;
   8     this.ifra = doc.createElement("iframe");
   9     this.ifra.style.visibility = "hidden";
  10     doc.body.appendChild(this.ifra);
  11     // this.ifra.contentWindow.onload = function () {
  12     //     this.ifra.contentWindow.location.href = 'winstream_rdxxx.php';
  13     // }
  14
  15 }
  16
  17 http_streaming.prototype = {
  18     console:           null,
  19     doc:               null,
  20     ifra:              null,
  21     keepalive_old:    -1,
  22     keepalive_new:    -1,
  23     keepalives_equal:  0,
  24     keepalives_eq_max: 6,
  25     watchdog_timeout: 2000,
  26
  27     start: function(page) {
  28         this.log("http_streaming:start");
  29         this.ifra.contentWindow.location.href = page;
  30         setTimeout(function(obj) { obj.watchdog(); }, this.watchdog_timeout, this);
  31     },
  32
  33     watchdog: function () {
  34         /* +this.keepalives_equal */
  35         this.log("hs::watchdog: start");
  36         if (this.keepalive_old == this.keepalive_new) {
  37             this.keepalives_equal++;
  38         }
  39         else {
  40             this.keepalives_equal = 0;
  41         }
  42
  43         if (this.keepalives_equal > this.keepalives_eq_max) {
  44             this.log("hs::watchdog: MAX ACHIEVED "+this.keepalives_equal);
  45         }
  46         else {
  47             setTimeout(function(obj) { obj.watchdog() }, this.watchdog_timeout, this);
  48         }
  49     },
  50
  51     keepalive: function () {
  52         this.keepalive_new++;
  53     },
  54
  55     log: function (s) {
  56         if (this.console != null) {
  57             return (this.console.log(s));
  58         }
  59     }
  60 }