web/xynt-streaming.js

   1 // old targetpage == page and moved into start method
   2
   3 //
   4 // CLASS transport_ws
   5 //
   6 function transport_ws(doc, xynt_streaming, page)
   7 {
   8     // if four arguments manage if WS or WSS connection
   9     if (arguments.length > 3)
  10         this.is_secure = arguments[3];
  11     else
  12         this.is_secure = false;
  13
  14     if (this.is_secure)
  15         this.name = "WebSocketSecure";
  16     else
  17         this.name = "WebSocket";
  18     this.ctx_new = "";
  19     var self = this;
  20
  21     this.doc = doc;
  22     this.failed = false;
  23     this.xynt_streaming = xynt_streaming;
  24     try {
  25         this.xynt_streaming.log("PAGE: "+page);
  26         this.ws = new WebSocket(page);
  27         this.ws.onopen = function () {
  28             console.log('WS On open');
  29
  30             self.xynt_streaming.log("onopen");
  31             if (this.readyState == 1) {
  32                 // connected
  33                 self.ws_cb("open");
  34                 self.init_steps = 1;
  35             }
  36         };
  37         this.ws.onmessage = function (msg) {
  38             console.log('WS On message');
  39             self.xynt_streaming.log("onmessage");
  40             // new data in msg.data
  41             self.ctx_new += msg.data;
  42         };
  43         this.ws.onclose = function (msg) {
  44             console.log('WS On close');
  45             self.onopen  = null;
  46             self.onclose = null;
  47             self.onerror = null;
  48             self.xynt_streaming.log("onclose"+self.init_steps);
  49             if (self.init_steps == 0)
  50                 self.ws_cb("error");
  51             else
  52                 self.ws_cb("close");
  53         };
  54         this.ws.onerror = function () {
  55             // on error
  56             this.onopen  = null;
  57             this.onclose = null;
  58             this.onerror = null;
  59             self.xynt_streaming.log("onerror");
  60             self.ws_cb("error");
  61         };
  62     }
  63     catch (ex) {
  64         throw "websocket creation failed";
  65     }
  66
  67     this.stopped = false;
  68 }
  69
  70 transport_ws.prototype = {
  71     doc: null,
  72     name: null,
  73     xynt_streaming: "ready",
  74     ws: null,
  75     stopped: true,
  76     failed: false,
  77
  78     init_steps: 0,
  79
  80     ctx_old: "",
  81     ctx_old_len: 0,
  82     ctx_new: "",
  83
  84     // script_clean: 0,
  85
  86     destroy: function () { /* public */
  87         if (this.ws != null) {
  88             this.ws_abort();
  89         }
  90         delete this.ws;
  91     },
  92
  93     ws_cb: function (from) {
  94         var ret;
  95
  96         if (from == "error") {
  97             if (this.xynt_streaming != "ready") {
  98                 if (this.xynt_streaming.transp_fback > 0) {
  99 this.xynt_streaming.log("DEC: "+this.xynt_streaming.transp_fback);
 100                     this.xynt_streaming.transp_fback--;
 101                     this.stopped = true;
 102                     this.xynt_streaming.reload();
 103                 }
 104             }
 105         }
 106         else if (from == "open") {
 107             this.flush_out_queue();
 108         }
 109
 110         if (this.ws != null && this.ws.readyState > 1) {
 111             this.stopped = true;
 112         }
 113     },
 114
 115     flush_out_queue: function() {
 116         var l_out = this.xynt_streaming.out_queue.length;
 117
 118         if (l_out == 0)
 119             return;
 120
 121         console.log('flush_out_queue: ' + l_out);
 122         for (var i = 0 ; i < l_out ; i++) {
 123             if (this.ws.readyState != 1) {
 124                 break;
 125             }
 126             var item = this.xynt_streaming.out_queue.shift();
 127             var sent = true;
 128             try {
 129                 this.ws.send(item);
 130             }
 131             catch (ex) {
 132                 this.xynt_streaming.out_queue.unshift(item);
 133                 break;
 134             }
 135         }
 136     },
 137
 138     send: function(msg) {
 139         console.log('new send');
 140         if (this.ws && this.ws.readyState == 1) {
 141             try {
 142                 console.log('Try send ... ');
 143                 this.flush_out_queue();
 144                 this.ws.send(msg);
 145                 console.log(' ... done');
 146             }
 147             catch (ex) {
 148                 console.log(' ... catched exception');
 149                 this.xynt_streaming.out_queue.push(msg);
 150             }
 151         }
 152         else {
 153             console.log('ws not ready: push into out_queue');
 154             this.xynt_streaming.out_queue.push(msg);
 155         }
 156     },
 157
 158     ws_abort: function() {
 159         if (this.ws != null) {
 160 this.xynt_streaming.log("WSCLOSE");
 161             this.ws.close();
 162         }
 163     },
 164
 165     xstr_is_init: function () { /* public */
 166         return (true);
 167     },
 168
 169     /* only after a successfull is_initialized call */
 170     xstr_is_ready: function () { /* public */
 171         return (this.ws.readyState == 1);
 172     },
 173
 174     xstr_set: function () { /* public */
 175         // already set
 176     },
 177
 178     ctx_new_is_set: function () { /* public */
 179         return (this.ctx_new != null);
 180     },
 181
 182     ctx_new_curlen_get: function () { /* public */
 183         return (this.ctx_new.length);
 184     },
 185
 186     ctx_new_getchar: function(idx) { /* public */
 187         return (this.ctx_new[idx]);
 188     },
 189
 190     ctx_old_len_is_set: function () { /* public */
 191         return (true);
 192     },
 193
 194     ctx_old_len_get: function () { /* public */
 195         return (this.ctx_old_len);
 196     },
 197
 198     ctx_old_len_set: function (len) { /* public */
 199         this.ctx_old_len = len;
 200     },
 201
 202     ctx_old_len_add: function (len) { /* public */
 203         this.ctx_old_len += len;
 204     },
 205
 206     new_part: function () { /* public */
 207         return (this.ctx_new.substr(this.ctx_old_len));
 208     },
 209
 210     scrcls_set: function (step) { /* public */
 211         // this.script_clean = step;
 212     },
 213
 214     postproc: function () {
 215         if (this.stopped && !this.xstr_is_ready()) {
 216             this.xynt_streaming.reload();
 217         }
 218     }
 219 }
 220
 221 //
 222 // CLASS transport_xhr
 223 //
 224 function transport_xhr(doc, xynt_streaming, page)
 225 {
 226     this.name = "XHR";
 227     this.doc = doc;
 228     this.xynt_streaming = xynt_streaming;
 229     this.xhr = createXMLHttpRequest();
 230     this.xhr.open('GET', page);
 231
 232     var self = this;
 233     this.xhr.onreadystatechange = function () { self.xhr_cb(); };
 234     this.xhr.send(null);
 235
 236     this.stopped = false;
 237 }
 238
 239 transport_xhr.prototype = {
 240     doc: null,
 241     name: null,
 242     xynt_streaming: "ready",
 243     xhr: null,
 244     stopped: true,
 245
 246     ctx_old: "",
 247     ctx_old_len: 0,
 248     ctx_new: null,
 249
 250     // script_clean: 0,
 251
 252     destroy: function () { /* public */
 253         if (this.xhr != null) {
 254             this.xhr_abort();
 255         }
 256         delete this.xhr;
 257     },
 258
 259     xhr_cb: function () {
 260         var ret;
 261
 262         if (this.xhr.readyState == 4) {
 263             // console.log("SS: "+safestatus(xhr));
 264
 265             // NOTE: delay management later
 266             // try {
 267             //     if ((ret = safestatus(this.xhr)) == 200) {
 268             //         this.delay = 0;
 269             //         // console.log("del a null "+this.delayed);
 270             //     } else if (ret != -1) {
 271             //         this.delay = 5000;
 272             //         this.hbit('X');
 273             //         // alert('There was a problem with the request.' + ret);
 274             //     }
 275             // } catch(b) {};
 276
 277             // this.delayed = null;
 278             this.stopped = true;
 279         }
 280     },
 281
 282     xhr_abort: function() {
 283         if (this.xhr != null) {
 284             this.xhr.abort();
 285         }
 286     },
 287
 288     xstr_is_init: function () { /* public */
 289         try {
 290             if (this.xhr.responseText != null) {
 291                 this.ctx_new = this.xhr.responseText;
 292             }
 293         }
 294         catch (e) {
 295         }
 296
 297         return (this.ctx_new != null);
 298     },
 299
 300     /* only after a successfull is_initialized call */
 301     xstr_is_ready: function () { /* public */
 302         return (this.xynt_streaming == "ready");
 303     },
 304
 305     xstr_set: function () { /* public */
 306         // already set
 307     },
 308
 309     ctx_new_is_set: function () { /* public */
 310         return (this.ctx_new != null);
 311     },
 312
 313     ctx_new_curlen_get: function () { /* public */
 314         return (this.ctx_new.length);
 315     },
 316
 317     ctx_new_getchar: function(idx) { /* public */
 318         return (this.ctx_new[idx]);
 319     },
 320
 321     ctx_old_len_is_set: function () { /* public */
 322         return (true);
 323     },
 324
 325     ctx_old_len_get: function () { /* public */
 326         return (this.ctx_old_len);
 327     },
 328
 329     ctx_old_len_set: function (len) { /* public */
 330         this.ctx_old_len = len;
 331     },
 332
 333     ctx_old_len_add: function (len) { /* public */
 334         this.ctx_old_len += len;
 335     },
 336
 337     new_part: function () { /* public */
 338         return (this.ctx_new.substr(this.ctx_old_len));
 339     },
 340
 341     scrcls_set: function (step) { /* public */
 342         // this.script_clean = step;
 343     },
 344
 345     postproc: function () {
 346         if (this.stopped && !this.xstr_is_ready()) {
 347             this.xynt_streaming.reload();
 348         }
 349     }
 350 }
 351
 352 //
 353 // CLASS transport_htmlfile
 354 //
 355 function transport_htmlfile(doc, xynt_streaming, page)
 356 {
 357     this.name = "HTMLFile";
 358     this.doc = doc;
 359     this.xynt_streaming = xynt_streaming;
 360     this.transfdoc = new ActiveXObject("htmlfile");
 361     this.transfdoc.open();
 362     this.transfdoc.write("<html><body><iframe id='iframe'></iframe></body></html>");
 363     this.transfdoc.close();
 364
 365     this.ifra = this.transfdoc.getElementById("iframe");
 366     this.ifra.contentWindow.location.href = page;
 367     this.stopped = false;
 368 }
 369
 370 transport_htmlfile.prototype = {
 371     doc: null,
 372     name: null,
 373     xynt_streaming: null,
 374     stopped: true,
 375     ifra: null,
 376     tradoc: null,
 377
 378     destroy: function () { /* public */
 379         if (this.ifra != null) {
 380         //     this.doc.body.removeChild(this.ifra);
 381         //     delete this.ifra;
 382              this.ifra = null;
 383         }
 384
 385         if (this.transfdoc) {
 386             delete this.transfdoc;
 387             this.transfdoc = null;
 388         }
 389     },
 390
 391     xstr_is_init: function () { /* public */
 392         return (typeof(this.ifra.contentWindow.xynt_streaming) != 'undefined');
 393     },
 394
 395     /* only after a successfull is_initialized call */
 396     xstr_is_ready: function () { /* public */
 397         return (this.ifra.contentWindow.xynt_streaming == "ready");
 398     },
 399
 400     /* only after a successfull is_initialized call */
 401     xstr_set: function () { /* public */
 402         if (this.ifra.contentWindow.xynt_streaming == "ready") {
 403             this.ifra.contentWindow.xynt_streaming = this.xynt_streaming;
 404             return (true);
 405         }
 406         else if (this.ifra.contentWindow.xynt_streaming == this.xynt_streaming) {
 407             return (true);
 408         }
 409         else {
 410             return (false);
 411         }
 412     },
 413
 414     ctx_new_is_set: function () { /* public */
 415         return (typeof(this.ifra.contentWindow.ctx_new) != 'undefined');
 416     },
 417
 418     ctx_new_curlen_get: function () { /* public */
 419         return (this.ifra.contentWindow.ctx_new.length);
 420     },
 421
 422     ctx_new_getchar: function(idx) { /* public */
 423         return (this.ifra.contentWindow.ctx_new.charAt(idx));
 424     },
 425
 426     ctx_old_len_is_set: function () { /* public */
 427         return (typeof(this.ifra.contentWindow.ctx_old_len) != 'undefined');
 428     },
 429
 430     ctx_old_len_get: function () { /* public */
 431         return (this.ifra.contentWindow.ctx_old_len);
 432     },
 433
 434     ctx_old_len_set: function (len) { /* public */
 435         this.ifra.contentWindow.ctx_old_len = len;
 436     },
 437
 438     ctx_old_len_add: function (len) { /* public */
 439         this.ifra.contentWindow.ctx_old_len += len;
 440     },
 441
 442     new_part: function () { /* public */
 443         return (this.ifra.contentWindow.ctx_new.substr(this.ifra.contentWindow.ctx_old_len));
 444     },
 445
 446     scrcls_set: function (step) { /* public */
 447         this.ifra.contentWindow.script_clean = step;
 448     },
 449
 450     postproc: function () { /* public */
 451         if (this.stopped && !this.xstr_is_ready()) {
 452             this.xynt_streaming.reload();
 453         }
 454     }
 455 }
 456
 457 //
 458 // CLASS transport_iframe
 459 //
 460 function transport_iframe(doc, xynt_streaming, page)
 461 {
 462     this.name = "IFRAME";
 463     this.doc = doc;
 464     this.xynt_streaming = xynt_streaming;
 465     this.ifra = doc.createElement("iframe");
 466     this.ifra.style.visibility = "hidden";
 467     doc.body.appendChild(this.ifra);
 468     this.ifra.contentWindow.location.href = page;
 469     this.stopped = false;
 470 }
 471
 472 transport_iframe.prototype = {
 473     doc: null,
 474     name: null,
 475     xynt_streaming: null,
 476     stopped: true,
 477     ifra: null,
 478
 479     destroy: function () { /* public */
 480         try {
 481             if (this.ifra != null) {
 482                 // NOTE:  on Opera this remove child crash js if called from
 483                 //        inside of the iframe, on IE on Windows without
 484                 //        it stream abort fails.
 485                 //        the problem is fixed setting into the iframe's onload
 486                 //        function the stopped attribute to true and delegate
 487                 //        postproc() fired by xynt_streaming watchdog()
 488                 this.doc.body.removeChild(this.ifra);
 489                 delete this.ifra;
 490                 this.ifra = null;
 491             }
 492         } catch (b) {
 493             alert("destroy exception catched");
 494         }
 495     },
 496
 497     xstr_is_init: function () { /* public */
 498         return (typeof(this.ifra.contentWindow.xynt_streaming) != 'undefined');
 499     },
 500
 501     /* only after a successfull is_initialized call */
 502     xstr_is_ready: function () { /* public */
 503         return (this.ifra.contentWindow.xynt_streaming == "ready");
 504     },
 505
 506     /* only after a successfull is_initialized call */
 507     xstr_set: function () { /* public */
 508         if (this.ifra.contentWindow.xynt_streaming == "ready") {
 509             this.ifra.contentWindow.xynt_streaming = this.xynt_streaming;
 510             return (true);
 511         }
 512         else if (this.ifra.contentWindow.xynt_streaming == this.xynt_streaming) {
 513             return (true);
 514         }
 515         else {
 516             return (false);
 517         }
 518     },
 519
 520
 521     /* only after a successfull is_ready call to be sure the accessibility of the var */
 522     xstr_set_old: function (xynt_streaming) { /* public */
 523         this.ifra.contentWindow.xynt_streaming = xynt_streaming;
 524     },
 525
 526     ctx_new_is_set: function () { /* public */
 527         return (typeof(this.ifra.contentWindow.ctx_new) != 'undefined');
 528     },
 529
 530     ctx_new_curlen_get: function () { /* public */
 531         return (this.ifra.contentWindow.ctx_new.length);
 532     },
 533
 534     ctx_new_getchar: function(idx) { /* public */
 535         return (this.ifra.contentWindow.ctx_new.charAt(idx));
 536     },
 537
 538     ctx_old_len_is_set: function () { /* public */
 539         return (typeof(this.ifra.contentWindow.ctx_old_len) != 'undefined');
 540     },
 541
 542     ctx_old_len_get: function () { /* public */
 543         return (this.ifra.contentWindow.ctx_old_len);
 544     },
 545
 546     ctx_old_len_set: function (len) { /* public */
 547         this.ifra.contentWindow.ctx_old_len = len;
 548     },
 549
 550     ctx_old_len_add: function (len) { /* public */
 551         this.ifra.contentWindow.ctx_old_len += len;
 552     },
 553
 554     new_part: function () { /* public */
 555         return (this.ifra.contentWindow.ctx_new.substr(this.ifra.contentWindow.ctx_old_len));
 556     },
 557
 558     scrcls_set: function (step) { /* public */
 559         this.ifra.contentWindow.script_clean = step;
 560     },
 561
 562     postproc: function () { /* public */
 563         if (this.stopped && !this.xstr_is_ready()) {
 564             this.xynt_streaming.reload();
 565         }
 566     }
 567 }
 568
 569 function xynt_streaming(win, transp_type, transp_port, transp_fback, console, gst, from, cookiename, sess, sandbox, page, cmdproc)
 570 {
 571     this.win = win;
 572     this.transp_type = transp_type;
 573     this.transp_port = transp_port;
 574     this.transp_fback = transp_fback;
 575     this.console = console;
 576     this.gst = gst;
 577     this.from = from;
 578     this.cookiename = cookiename;
 579     this.sess = sess;
 580     this.sandbox = sandbox;
 581     this.page = page;
 582     this.cmdproc = cmdproc;
 583     // this.cmdproc = function(com){/* console.log("COM: "+com); */ eval(com);}
 584     this.doc = win.document;
 585     this.keepalive_old = -1;
 586     this.keepalive_new = -1;
 587     this.out_queue = [];
 588
 589     this.mon_errtime = this.keepalives_eq_max * this.watchdog_checktm * this.watchdog_timeout;
 590     this.mon_wrntime = this.mon_errtime / 2;
 591
 592     this.mon_update();
 593 }
 594
 595 xynt_streaming.prototype = {
 596     win:               null,
 597     transp_type:       null,
 598     transp_port:         80,
 599     transp_type_cur:   null,
 600     transp_port_cur:     80,
 601     transp_fback:         0,
 602     transp:            null,
 603     console:           null,
 604     gst:               null,
 605     from:              null,
 606     cookiename:        null,
 607     sess:              null,
 608     sandbox:           null,
 609     page:              null,
 610     cmdproc:           null,
 611
 612     start_time:        0,
 613     restart_wait:      5000, // wait restart_wait millisec before begin to check if restart is needed
 614
 615     doc:               null,
 616     cookiepath: "/brisk/",
 617     watchdog_hdl:      null,
 618     hbit:              function () {},
 619     keepalive_old:    -1,
 620     keepalive_new:    -1,
 621     keepalives_equal:  0,
 622     /* NOTE: right watch_timeout value to 100, for devel reasons use 1000 or more */
 623     /* restart after  4 * 40 * 100 millisec if server ping is missing => 16secs */
 624     keepalives_eq_max: 4,
 625     watchdog_checktm:  40,
 626     watchdog_timeout:  100,
 627     watchdog_ct:       0,
 628     watchable:         false,
 629     restart_n:         0,
 630     comm_match:        /_*@BEGIN@(.*?)@END@/g,
 631     comm_clean:        /_*@BEGIN@(.*?)@END@/,
 632     stream:            "",
 633     out_queue:         null,
 634     the_end:           false,
 635
 636     mon_time:         -1,
 637     mon_wrntime:       0,
 638     mon_errtime:       0,
 639
 640     mon_stat_old:      "",
 641
 642     mon_update: function()
 643     {
 644         var date = new Date();
 645
 646         this.mon_time = date.getTime();
 647     },
 648
 649     /*
 650       ping arrives at least every RD_KEEPALIVE_TOUT secs (currently 4 secs)
 651
 652       return values: 0 unknown
 653                      1 ok
 654                      2 warning
 655                      3 error
 656      */
 657     mon_status: function()
 658     {
 659         var delta, date;
 660
 661         var date = new Date();
 662
 663         delta = date.getTime() - this.mon_time;
 664
 665         if (delta < this.mon_wrntime)
 666             return 1;
 667         else if (delta < this.mon_errtime)
 668             return 2;
 669         else
 670             return 3;
 671     },
 672
 673     start: function() { /* public */
 674         var transp_type;
 675         var page;
 676
 677         // this.log("start "+this.transp_type+" "+this.transp_fback);
 678         if (this.the_end)
 679             return;
 680
 681         createCookie(this.cookiename, sess, 24*365, this.cookiepath);
 682         // alert("start");
 683         this.log("xynt_streaming:start restart: "+this.restart_n);
 684         this.keepalives_equal = 0;
 685
 686         // page arrangement
 687         this.page = url_complete(this.win.location.href, this.page);
 688
 689         // DEFAULT TRANSPORT PROTOCOL HERE websocketsec, websocket
 690         if (this.transp_fback > 0) {
 691             if (location.protocol == 'https:') {
 692                 transp_type = "websocketsec";
 693                 transp_port = 443;
 694             }
 695             else {
 696                 transp_type = "websocket";
 697                 transp_port = (this.transp_fback == 2 ? 80 : 8080);
 698             }
 699
 700         }
 701         else {
 702             transp_type = this.transp_type;
 703             transp_port = this.transp_port;
 704         }
 705
 706         this.transp_type_cur = transp_type;
 707         this.transp_port_cur = transp_port;
 708
 709         if (transp_type == "websocket" || transp_type == "websocketsec") {
 710             var end_proto, first_slash, newpage;
 711
 712             // change protocol
 713             this.log("precha ["+this.page+"]");
 714             if (transp_type == "websocketsec") {
 715                 newpage = this.page.replace(/\.php$/g, "_wss.php").replace(/\.php\?/g, "_wss.php?");
 716                 }
 717             else {
 718                 newpage = this.page;
 719                 }
 720             end_proto = newpage.indexOf("://");
 721             first_slash = newpage.substring(end_proto+3).indexOf("/");
 722
 723             page = (transp_type == "websocketsec" ? "wss://" : "ws://")
 724                 + newpage.substring(end_proto+3, end_proto+3 + first_slash) + ":"
 725                 + transp_port + newpage.substring(end_proto+3 + first_slash);
 726             // this.log("MOP WS: " + page);
 727         }
 728         else {
 729             page = this.page;
 730         }
 731         // stat, subst, this.gst.st
 732
 733         page = url_append_args(page, "sess", this.sess, "stat", stat, "subst", subst, "step", this.gst.st, "from", this.from);
 734         // this.log("the page:");
 735         // this.log(page);
 736
 737         try {
 738             // transport instantiation
 739             if (transp_type == "websocketsec") {
 740                 page = url_append_args(page, "transp", "websocketsec");
 741                 this.transp = new transport_ws(this.doc, this, page, true);
 742             }
 743             else if (transp_type == "websocket") {
 744                 page = url_append_args(page, "transp", "websocket");
 745                 this.transp = new transport_ws(this.doc, this, page);
 746             }
 747             else if (transp_type == "xhr") {
 748                 page = url_append_args(page, "transp", "xhr");
 749                 this.transp = new transport_xhr(this.doc, this, page);
 750             }
 751             else if (transp_type == "iframe") {
 752                 page = url_append_args(page, "transp", "iframe");
 753                 this.transp = new transport_iframe(this.doc, this, page);
 754             }
 755             else if (transp_type == "htmlfile") {
 756                 page = url_append_args(page, "transp", "htmlfile");
 757                 this.transp = new transport_htmlfile(this.doc, this, page);
 758             }
 759             else
 760                 return;
 761         }
 762         catch (err) {
 763             if (this.transp_fback > 0) {
 764                 this.transp_fback--;
 765                 this.start();
 766                 return;
 767             }
 768         }
 769
 770         // watchdog setting
 771         this.watchdog_ct  = 0;
 772         if (!this.the_end) {
 773             this.watchdog_hdl = setTimeout(function(obj) { obj.log("tout1"); obj.watchdog(); }, this.watchdog_timeout, this);
 774         }
 775
 776         var date = new Date();
 777         this.start_time = date.getTime();
 778     },
 779
 780     stop: function() {
 781         this.the_end = true;
 782         this.abort();
 783     },
 784
 785     hbit_set: function (hbit) {
 786         this.hbit = hbit;
 787     },
 788
 789
 790     hbit_status: function () {
 791         var ret;
 792
 793         ret = this.mon_status();
 794         // console.log("mon_status: "+ret+" 0: "+this.mon_time);
 795         switch (ret) {
 796         case 0:
 797             mon_stat = "b";
 798             break;
 799         case 1:
 800             mon_stat = "g";
 801             break;
 802         case 2:
 803             mon_stat = "y";
 804             break;
 805         case 3:
 806             mon_stat = "r";
 807             break;
 808         }
 809
 810         if (this.mon_stat_old != mon_stat) {
 811             this.hbit(mon_stat);
 812             this.mon_stat_old = mon_stat;
 813         }
 814     },
 815
 816
 817     watchdog: function () {
 818         // alert("watchdog");
 819         var i, again;
 820         var comm_newpart, comm_len, comm_arr;
 821         var ctx_new_len;
 822
 823         if (this.sandbox != null) {
 824             var zug = "WATCHDOG  sess = ["+this.sess+"]  step = "+this.gst.st+" step_loc = "+this.gst.st_loc+" step_loc_new = "+this.gst.st_loc_new+"Transport: "+this.transp.name;
 825             if (zug != this.sandbox.innerHTML)
 826                 this.sandbox.innerHTML = zug;
 827         }
 828
 829         // WATCHDOGING THE CONNECTION
 830         this.log("hs::watchdog: start, cur equal times: "+this.keepalives_equal);
 831         if (!this.watchable) {
 832             do {
 833                 try{
 834                     // if (typeof(this.ifra.contentWindow.xynt_streaming) == 'undefined')
 835                     if (!this.transp.xstr_is_init()) {
 836                         this.log("hs::watchdog: xstr_is_init = false");
 837                         break;
 838                     }
 839                 }
 840                 catch(b) {
 841                     this.log("hs::watchdog: exception");
 842                     break;
 843                 }
 844
 845                 /*
 846                   on IE7 the the window frame scope is cleaned after the href is set, so we wait
 847                   for a well know variable value before assign this object value to it (OO is a passion)
 848                 */
 849                 // if (this.ifra.contentWindow.xynt_streaming == "ready") {
 850                 if (this.transp.xstr_set()) {
 851                     // this.ifra.contentWindow.xynt_streaming = this;
 852                     this.watchable = true;
 853                     this.watchdog_ct = 0;
 854                     this.log("hs::watchdog: watchable = yes");
 855                 }
 856             } while (false);
 857         }
 858         if ( (this.watchdog_ct % this.watchdog_checktm) == 0) {
 859             this.log("hs::watchdog: this.keepalive_old: "+this.keepalive_old+" this.keepalive_new: "+this.keepalive_new);
 860             if (this.keepalive_old == this.keepalive_new) {
 861                 this.keepalives_equal++;
 862             }
 863             else {
 864                 this.keepalive_old = this.keepalive_new;
 865                 this.keepalives_equal = 0;
 866             }
 867
 868             if (this.keepalives_equal >= this.keepalives_eq_max) {
 869                 this.log("hs::watchdog: MAX ACHIEVED "+this.keepalives_equal);
 870                 this.reload();
 871                 // alert("watchdog return reload");
 872                 this.hbit_status();
 873                 return;
 874             }
 875         }
 876
 877         // PICK COMMANDS FROM STREAM
 878         do {
 879             // alert("do--while begin ["+again+"]");
 880             // CHECK: maybe again here isn't needed
 881             again = 0;
 882             try {
 883                 /* if (typeof(this.ifra.contentWindow.ctx_new)     == 'undefined' ||
 884                    typeof(this.ifra.contentWindow.ctx_old_len) == 'undefined') */
 885                 if (!this.transp.ctx_new_is_set() || !this.transp.ctx_old_len_is_set())
 886                     break;
 887             }
 888             catch(b) {
 889                 break;
 890             }
 891
 892             // ctx_new_len = this.ifra.contentWindow.ctx_new.length;
 893             ctx_new_len = this.transp.ctx_new_curlen_get();
 894             // if (ctx_new_len <= this.ifra.contentWindow.ctx_old_len) {
 895             if (ctx_new_len <= this.transp.ctx_old_len_get()) {
 896                 break;
 897             }
 898             this.log("new: "+ ctx_new_len + "  old: "+this.transp.ctx_old_len_get());
 899             this.keepalive_new++;
 900             // alert("pre-loop 1");
 901             for (i = this.transp.ctx_old_len_get() ; i < ctx_new_len ; i++) {
 902                 // if (this.ifra.contentWindow.ctx_new.charAt(i) != '_') {
 903                 if (this.transp.ctx_new_getchar(i) != '_') {
 904                     // this.log("ctx_new.char(i) != '_' ["+this.ifra.contentWindow.ctx_new.charAt(i)+"]");
 905                     break;
 906                 }
 907                 this.mon_update();
 908                 this.hbit_status();
 909
 910                 // else {
 911                 //     this.log("ctx_new.charAt(i) == '_'");
 912                 // }
 913             }
 914             // this.ifra.contentWindow.ctx_old_len = i;
 915             this.transp.ctx_old_len_set(i);
 916             if (i == ctx_new_len) {
 917                 this.log("old_len == i");
 918                 break;
 919             }
 920             else {
 921                 this.log("old_len != i: "+i);
 922             }
 923             // alert("do--while middle ["+this.ifra.contentWindow.ctx_old_len+"]");
 924
 925             comm_newpart = this.transp.new_part();
 926             this.log("COM_NEWPART: ["+comm_newpart+"]");
 927             comm_len = 0;
 928             comm_arr = comm_newpart.match(this.comm_match);
 929
 930             // alert("do--while middle2 ["+again+"]");
 931             if (comm_arr) {
 932                 var comm_arr_len = comm_arr.length;
 933                 for (i = 0 ; i < comm_arr_len ; i++) {
 934                     var temp = comm_arr[i].replace(this.comm_clean,"$1").split("|");
 935                     this.gst.comms = this.gst.comms.concat(temp);
 936                     comm_len += comm_arr[i].length;
 937                 }
 938                 again = 1;
 939                 this.mon_update();
 940                 this.hbit_status();
 941             }
 942             // this.ifra.contentWindow.ctx_old_len += comm_len;
 943             this.transp.ctx_old_len_add(comm_len);
 944             // this.ifra.contentWindow.script_clean = this.gst.st;
 945             this.transp.scrcls_set(this.gst.st);
 946             // alert("do--while end ["+again+"]");
 947         } while (again);
 948
 949         // alert("post while");
 950         // EXECUTION OF STREAM COMMANDS
 951         do {
 952             again = 0;
 953             //MOP ?? xhrrestart = 0;
 954             if (this.gst.st_loc < this.gst.st_loc_new) {
 955                 // there is some slow actions running
 956                 break;
 957             }
 958             else if (this.gst.comms.length > 0) {
 959                 var singlecomm;
 960
 961                 singlecomm = this.gst.comms.shift();
 962                 // alert("EXE"+gugu);
 963                 // $("xhrdeltalog").innerHTML = "EVALL: "+singlecomm.replace("<", "&lt;", "g"); +"<br>";
 964                 //xx this.hbit("+");
 965
 966                 // alert("SINGLE: ["+singlecomm+"]");
 967                 // window.console.log("["+singlecomm+"]");
 968                 this.cmdproc(singlecomm);
 969                 if (this.transp_type_cur) {
 970                     this.transp_type = this.transp_type_cur;
 971                     this.transp_port = this.transp_port_cur;
 972                 }
 973                 again = 1;
 974             }
 975         } while (again);
 976         this.watchdog_ct++;
 977         if (!this.the_end) {
 978             var date = new Date();
 979             if (date.getTime() > (this.start_time + this.restart_wait)) {
 980                 this.transp.postproc();
 981             }
 982             this.watchdog_hdl = setTimeout(function(obj) { /* obj.log("tout2"); */ obj.watchdog(); }, this.watchdog_timeout, this);
 983             this.hbit_status();
 984         }
 985         // alert("watchdog return normal");
 986
 987         return;
 988     },
 989
 990     send: function(msg) {
 991         if (typeof(this.transp.send) == 'undefined') {
 992             this.log('send not implemented for ' + this.transp_type);
 993             return;
 994         }
 995
 996         return this.transp.send(msg);
 997     },
 998
 999     //
1000     // moved to xynt-streaming-ifra as push()
1001     //
1002     // keepalive: function (s) {
1003     //     this.log("hs::keepalive");
1004     //     if (s != null) {
1005     //         this.log(s);
1006     //         this.ifra.contentWindow.ctx_new += "@BEGIN@"+s+"@END@";
1007     //     }
1008     //     else {
1009     //         this.ifra.contentWindow.ctx_new += "_";
1010     //     }
1011     //     // this.keepalive_new++;
1012     // },
1013
1014     abort: function () { /* public */
1015         // this.log("PATH: "+this.ifra.contentWindow.location.protocol + "://" + this.ifra.contentWindow.location.host + "/" + this.ifra.contentWindow.location.pathname);
1016
1017         this.gst.abort();
1018         if (this.watchdog_hdl != null) {
1019             clearTimeout(this.watchdog_hdl);
1020             this.watchdog_hdl = null;
1021         }
1022
1023         this.restart_n++;
1024         this.log("hs::reload");
1025         this.watchable = false;
1026         if (this.transp != null) {
1027             this.transp.destroy();
1028             delete this.transp;
1029             this.transp = null;
1030         }
1031     },
1032
1033     reload: function () {
1034         this.abort();
1035         this.start(null);
1036     },
1037
1038     log: function (s) {
1039         if (this.console != null) {
1040             return (this.console.log(s));
1041         }
1042     }
1043 }