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     this.out_queue = [];
  20     var self = this;
  21
  22     this.doc = doc;
  23     this.failed = false;
  24     this.xynt_streaming = xynt_streaming;
  25     try {
  26         this.xynt_streaming.log("PAGE: "+page);
  27         this.ws = new WebSocket(page);
  28         this.ws.onopen = function () {
  29             console.log('WS On open');
  30
  31             self.xynt_streaming.log("onopen");
  32             if (this.readyState == 1) {
  33                 // connected
  34                 self.ws_cb("open");
  35                 self.init_steps = 1;
  36             }
  37         };
  38         this.ws.onmessage = function (msg) {
  39             console.log('WS On message');
  40             self.xynt_streaming.log("onmessage");
  41             // new data in msg.data
  42             self.ctx_new += msg.data;
  43         };
  44         this.ws.onclose = function (msg) {
  45             console.log('WS On close');
  46             self.onopen  = null;
  47             self.onclose = null;
  48             self.onerror = null;
  49             self.xynt_streaming.log("onclose"+self.init_steps);
  50             if (self.init_steps == 0)
  51                 self.ws_cb("error");
  52             else
  53                 self.ws_cb("close");
  54         };
  55         this.ws.onerror = function () {
  56             // on error
  57             this.onopen  = null;
  58             this.onclose = null;
  59             this.onerror = null;
  60             self.xynt_streaming.log("onerror");
  61             self.ws_cb("error");
  62         };
  63     }
  64     catch (ex) {
  65         throw "websocket creation failed";
  66     }
  67
  68     this.stopped = false;
  69 }
  70
  71 transport_ws.prototype = {
  72     doc: null,
  73     name: null,
  74     xynt_streaming: "ready",
  75     ws: null,
  76     out_queue: null,
  77     stopped: true,
  78     failed: false,
  79
  80     init_steps: 0,
  81
  82     ctx_old: "",
  83     ctx_old_len: 0,
  84     ctx_new: "",
  85
  86     // script_clean: 0,
  87
  88     destroy: function () { /* public */
  89         if (this.ws != null) {
  90             this.ws_abort();
  91         }
  92         delete this.ws;
  93     },
  94
  95     ws_cb: function (from) {
  96         var ret;
  97
  98         if (from == "error") {
  99             if (this.xynt_streaming != "ready") {
 100                 if (this.xynt_streaming.transp_fback > 0) {
 101 this.xynt_streaming.log("DEC: "+this.xynt_streaming.transp_fback);
 102                     this.xynt_streaming.transp_fback--;
 103                     this.stopped = true;
 104                     this.xynt_streaming.reload();
 105                 }
 106             }
 107         }
 108         else if (from == "open") {
 109             this.flush_out_queue();
 110         }
 111
 112         if (this.ws != null && this.ws.readyState > 1) {
 113             this.stopped = true;
 114         }
 115     },
 116
 117     flush_out_queue: function() {
 118         var l_out = this.out_queue.length;
 119         if (l_out == 0)
 120             return;
 121
 122         for (var i = 0 ; i < l_out ; i++) {
 123             if (this.ws.readyState != 1) {
 124                 break;
 125             }
 126             var item = this.out_queue.shift();
 127             var sent = true;
 128             try {
 129                 this.ws.send(item);
 130             }
 131             catch (ex) {
 132                 this.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.flush_out.push(msg);
 150             }
 151         }
 152         else {
 153             console.log('ws not ready: push into flush_out');
 154             this.flush_out.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
 588     this.mon_errtime = this.keepalives_eq_max * this.watchdog_checktm * this.watchdog_timeout;
 589     this.mon_wrntime = this.mon_errtime / 2;
 590
 591     this.mon_update();
 592 }
 593
 594 xynt_streaming.prototype = {
 595     win:               null,
 596     transp_type:       null,
 597     transp_port:         80,
 598     transp_type_cur:   null,
 599     transp_port_cur:     80,
 600     transp_fback:         0,
 601     transp:            null,
 602     console:           null,
 603     gst:               null,
 604     from:              null,
 605     cookiename:        null,
 606     sess:              null,
 607     sandbox:           null,
 608     page:              null,
 609     cmdproc:           null,
 610
 611     start_time:        0,
 612     restart_wait:      5000, // wait restart_wait millisec before begin to check if restart is needed
 613
 614     doc:               null,
 615     cookiepath: "/brisk/",
 616     watchdog_hdl:      null,
 617     hbit:              function () {},
 618     keepalive_old:    -1,
 619     keepalive_new:    -1,
 620     keepalives_equal:  0,
 621     /* NOTE: right watch_timeout value to 100, for devel reasons use 1000 or more */
 622     /* restart after  4 * 40 * 100 millisec if server ping is missing => 16secs */
 623     keepalives_eq_max: 4,
 624     watchdog_checktm:  40,
 625     watchdog_timeout:  100,
 626     watchdog_ct:       0,
 627     watchable:         false,
 628     restart_n:         0,
 629     comm_match:        /_*@BEGIN@(.*?)@END@/g,
 630     comm_clean:        /_*@BEGIN@(.*?)@END@/,
 631     stream:            "",
 632     the_end:           false,
 633
 634     mon_time:         -1,
 635     mon_wrntime:       0,
 636     mon_errtime:       0,
 637
 638     mon_stat_old:      "",
 639
 640     mon_update: function()
 641     {
 642         var date = new Date();
 643
 644         this.mon_time = date.getTime();
 645     },
 646
 647     /*
 648       ping arrives at least every RD_KEEPALIVE_TOUT secs (currently 4 secs)
 649
 650       return values: 0 unknown
 651                      1 ok
 652                      2 warning
 653                      3 error
 654      */
 655     mon_status: function()
 656     {
 657         var delta, date;
 658
 659         var date = new Date();
 660
 661         delta = date.getTime() - this.mon_time;
 662
 663         if (delta < this.mon_wrntime)
 664             return 1;
 665         else if (delta < this.mon_errtime)
 666             return 2;
 667         else
 668             return 3;
 669     },
 670
 671     start: function() { /* public */
 672         var transp_type;
 673         var page;
 674
 675         // this.log("start "+this.transp_type+" "+this.transp_fback);
 676         if (this.the_end)
 677             return;
 678
 679         createCookie(this.cookiename, sess, 24*365, this.cookiepath);
 680         // alert("start");
 681         this.log("xynt_streaming:start restart: "+this.restart_n);
 682         this.keepalives_equal = 0;
 683
 684         // page arrangement
 685         this.page = url_complete(this.win.location.href, this.page);
 686
 687         // DEFAULT TRANSPORT PROTOCOL HERE websocketsec, websocket
 688         if (this.transp_fback > 0) {
 689             if (location.protocol == 'https:') {
 690                 transp_type = "websocketsec";
 691                 transp_port = 443;
 692             }
 693             else {
 694                 transp_type = "websocket";
 695                 transp_port = (this.transp_fback == 2 ? 80 : 8080);
 696             }
 697
 698         }
 699         else {
 700             transp_type = this.transp_type;
 701             transp_port = this.transp_port;
 702         }
 703
 704         this.transp_type_cur = transp_type;
 705         this.transp_port_cur = transp_port;
 706
 707         if (transp_type == "websocket" || transp_type == "websocketsec") {
 708             var end_proto, first_slash, newpage;
 709
 710             // change protocol
 711             this.log("precha ["+this.page+"]");
 712             if (transp_type == "websocketsec") {
 713                 newpage = this.page.replace(/\.php$/g, "_wss.php").replace(/\.php\?/g, "_wss.php?");
 714                 }
 715             else {
 716                 newpage = this.page;
 717                 }
 718             end_proto = newpage.indexOf("://");
 719             first_slash = newpage.substring(end_proto+3).indexOf("/");
 720
 721             page = (transp_type == "websocketsec" ? "wss://" : "ws://")
 722                 + newpage.substring(end_proto+3, end_proto+3 + first_slash) + ":"
 723                 + transp_port + newpage.substring(end_proto+3 + first_slash);
 724             // this.log("MOP WS: " + page);
 725         }
 726         else {
 727             page = this.page;
 728         }
 729         // stat, subst, this.gst.st
 730
 731         page = url_append_args(page, "sess", this.sess, "stat", stat, "subst", subst, "step", this.gst.st, "from", this.from);
 732         // this.log("the page:");
 733         // this.log(page);
 734
 735         try {
 736             // transport instantiation
 737             if (transp_type == "websocketsec") {
 738                 page = url_append_args(page, "transp", "websocketsec");
 739                 this.transp = new transport_ws(this.doc, this, page, true);
 740             }
 741             else if (transp_type == "websocket") {
 742                 page = url_append_args(page, "transp", "websocket");
 743                 this.transp = new transport_ws(this.doc, this, page);
 744             }
 745             else if (transp_type == "xhr") {
 746                 page = url_append_args(page, "transp", "xhr");
 747                 this.transp = new transport_xhr(this.doc, this, page);
 748             }
 749             else if (transp_type == "iframe") {
 750                 page = url_append_args(page, "transp", "iframe");
 751                 this.transp = new transport_iframe(this.doc, this, page);
 752             }
 753             else if (transp_type == "htmlfile") {
 754                 page = url_append_args(page, "transp", "htmlfile");
 755                 this.transp = new transport_htmlfile(this.doc, this, page);
 756             }
 757             else
 758                 return;
 759         }
 760         catch (err) {
 761             if (this.transp_fback > 0) {
 762                 this.transp_fback--;
 763                 this.start();
 764                 return;
 765             }
 766         }
 767
 768         // watchdog setting
 769         this.watchdog_ct  = 0;
 770         if (!this.the_end) {
 771             this.watchdog_hdl = setTimeout(function(obj) { obj.log("tout1"); obj.watchdog(); }, this.watchdog_timeout, this);
 772         }
 773
 774         var date = new Date();
 775         this.start_time = date.getTime();
 776     },
 777
 778     stop: function() {
 779         this.the_end = true;
 780         this.abort();
 781     },
 782
 783     hbit_set: function (hbit) {
 784         this.hbit = hbit;
 785     },
 786
 787
 788     hbit_status: function () {
 789         var ret;
 790
 791         ret = this.mon_status();
 792         // console.log("mon_status: "+ret+" 0: "+this.mon_time);
 793         switch (ret) {
 794         case 0:
 795             mon_stat = "b";
 796             break;
 797         case 1:
 798             mon_stat = "g";
 799             break;
 800         case 2:
 801             mon_stat = "y";
 802             break;
 803         case 3:
 804             mon_stat = "r";
 805             break;
 806         }
 807
 808         if (this.mon_stat_old != mon_stat) {
 809             this.hbit(mon_stat);
 810             this.mon_stat_old = mon_stat;
 811         }
 812     },
 813
 814
 815     watchdog: function () {
 816         // alert("watchdog");
 817         var i, again;
 818         var comm_newpart, comm_len, comm_arr;
 819         var ctx_new_len;
 820
 821         if (this.sandbox != null) {
 822             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;
 823             if (zug != this.sandbox.innerHTML)
 824                 this.sandbox.innerHTML = zug;
 825         }
 826
 827         // WATCHDOGING THE CONNECTION
 828         this.log("hs::watchdog: start, cur equal times: "+this.keepalives_equal);
 829         if (!this.watchable) {
 830             do {
 831                 try{
 832                     // if (typeof(this.ifra.contentWindow.xynt_streaming) == 'undefined')
 833                     if (!this.transp.xstr_is_init()) {
 834                         this.log("hs::watchdog: xstr_is_init = false");
 835                         break;
 836                     }
 837                 }
 838                 catch(b) {
 839                     this.log("hs::watchdog: exception");
 840                     break;
 841                 }
 842
 843                 /*
 844                   on IE7 the the window frame scope is cleaned after the href is set, so we wait
 845                   for a well know variable value before assign this object value to it (OO is a passion)
 846                 */
 847                 // if (this.ifra.contentWindow.xynt_streaming == "ready") {
 848                 if (this.transp.xstr_set()) {
 849                     // this.ifra.contentWindow.xynt_streaming = this;
 850                     this.watchable = true;
 851                     this.watchdog_ct = 0;
 852                     this.log("hs::watchdog: watchable = yes");
 853                 }
 854             } while (false);
 855         }
 856         if ( (this.watchdog_ct % this.watchdog_checktm) == 0) {
 857             this.log("hs::watchdog: this.keepalive_old: "+this.keepalive_old+" this.keepalive_new: "+this.keepalive_new);
 858             if (this.keepalive_old == this.keepalive_new) {
 859                 this.keepalives_equal++;
 860             }
 861             else {
 862                 this.keepalive_old = this.keepalive_new;
 863                 this.keepalives_equal = 0;
 864             }
 865
 866             if (this.keepalives_equal >= this.keepalives_eq_max) {
 867                 this.log("hs::watchdog: MAX ACHIEVED "+this.keepalives_equal);
 868                 this.reload();
 869                 // alert("watchdog return reload");
 870                 this.hbit_status();
 871                 return;
 872             }
 873         }
 874
 875         // PICK COMMANDS FROM STREAM
 876         do {
 877             // alert("do--while begin ["+again+"]");
 878             // CHECK: maybe again here isn't needed
 879             again = 0;
 880             try {
 881                 /* if (typeof(this.ifra.contentWindow.ctx_new)     == 'undefined' ||
 882                    typeof(this.ifra.contentWindow.ctx_old_len) == 'undefined') */
 883                 if (!this.transp.ctx_new_is_set() || !this.transp.ctx_old_len_is_set())
 884                     break;
 885             }
 886             catch(b) {
 887                 break;
 888             }
 889
 890             // ctx_new_len = this.ifra.contentWindow.ctx_new.length;
 891             ctx_new_len = this.transp.ctx_new_curlen_get();
 892             // if (ctx_new_len <= this.ifra.contentWindow.ctx_old_len) {
 893             if (ctx_new_len <= this.transp.ctx_old_len_get()) {
 894                 break;
 895             }
 896             this.log("new: "+ ctx_new_len + "  old: "+this.transp.ctx_old_len_get());
 897             this.keepalive_new++;
 898             // alert("pre-loop 1");
 899             for (i = this.transp.ctx_old_len_get() ; i < ctx_new_len ; i++) {
 900                 // if (this.ifra.contentWindow.ctx_new.charAt(i) != '_') {
 901                 if (this.transp.ctx_new_getchar(i) != '_') {
 902                     // this.log("ctx_new.char(i) != '_' ["+this.ifra.contentWindow.ctx_new.charAt(i)+"]");
 903                     break;
 904                 }
 905                 this.mon_update();
 906                 this.hbit_status();
 907
 908                 // else {
 909                 //     this.log("ctx_new.charAt(i) == '_'");
 910                 // }
 911             }
 912             // this.ifra.contentWindow.ctx_old_len = i;
 913             this.transp.ctx_old_len_set(i);
 914             if (i == ctx_new_len) {
 915                 this.log("old_len == i");
 916                 break;
 917             }
 918             else {
 919                 this.log("old_len != i: "+i);
 920             }
 921             // alert("do--while middle ["+this.ifra.contentWindow.ctx_old_len+"]");
 922
 923             comm_newpart = this.transp.new_part();
 924             this.log("COM_NEWPART: ["+comm_newpart+"]");
 925             comm_len = 0;
 926             comm_arr = comm_newpart.match(this.comm_match);
 927
 928             // alert("do--while middle2 ["+again+"]");
 929             if (comm_arr) {
 930                 var comm_arr_len = comm_arr.length;
 931                 for (i = 0 ; i < comm_arr_len ; i++) {
 932                     var temp = comm_arr[i].replace(this.comm_clean,"$1").split("|");
 933                     this.gst.comms = this.gst.comms.concat(temp);
 934                     comm_len += comm_arr[i].length;
 935                 }
 936                 again = 1;
 937                 this.mon_update();
 938                 this.hbit_status();
 939             }
 940             // this.ifra.contentWindow.ctx_old_len += comm_len;
 941             this.transp.ctx_old_len_add(comm_len);
 942             // this.ifra.contentWindow.script_clean = this.gst.st;
 943             this.transp.scrcls_set(this.gst.st);
 944             // alert("do--while end ["+again+"]");
 945         } while (again);
 946
 947         // alert("post while");
 948         // EXECUTION OF STREAM COMMANDS
 949         do {
 950             again = 0;
 951             //MOP ?? xhrrestart = 0;
 952             if (this.gst.st_loc < this.gst.st_loc_new) {
 953                 // there is some slow actions running
 954                 break;
 955             }
 956             else if (this.gst.comms.length > 0) {
 957                 var singlecomm;
 958
 959                 singlecomm = this.gst.comms.shift();
 960                 // alert("EXE"+gugu);
 961                 // $("xhrdeltalog").innerHTML = "EVALL: "+singlecomm.replace("<", "&lt;", "g"); +"<br>";
 962                 //xx this.hbit("+");
 963
 964                 // alert("SINGLE: ["+singlecomm+"]");
 965                 // window.console.log("["+singlecomm+"]");
 966                 this.cmdproc(singlecomm);
 967                 if (this.transp_type_cur) {
 968                     this.transp_type = this.transp_type_cur;
 969                     this.transp_port = this.transp_port_cur;
 970                 }
 971                 again = 1;
 972             }
 973         } while (again);
 974         this.watchdog_ct++;
 975         if (!this.the_end) {
 976             var date = new Date();
 977             if (date.getTime() > (this.start_time + this.restart_wait)) {
 978                 this.transp.postproc();
 979             }
 980             this.watchdog_hdl = setTimeout(function(obj) { /* obj.log("tout2"); */ obj.watchdog(); }, this.watchdog_timeout, this);
 981             this.hbit_status();
 982         }
 983         // alert("watchdog return normal");
 984
 985         return;
 986     },
 987
 988     send: function(msg) {
 989         if (typeof(this.transp.send) == 'undefined') {
 990             this.log('send not implemented for ' + this.transp_type);
 991             return;
 992         }
 993
 994         return this.transp.send(msg);
 995     },
 996
 997     //
 998     // moved to xynt-streaming-ifra as push()
 999     //
1000     // keepalive: function (s) {
1001     //     this.log("hs::keepalive");
1002     //     if (s != null) {
1003     //         this.log(s);
1004     //         this.ifra.contentWindow.ctx_new += "@BEGIN@"+s+"@END@";
1005     //     }
1006     //     else {
1007     //         this.ifra.contentWindow.ctx_new += "_";
1008     //     }
1009     //     // this.keepalive_new++;
1010     // },
1011
1012     abort: function () { /* public */
1013         // this.log("PATH: "+this.ifra.contentWindow.location.protocol + "://" + this.ifra.contentWindow.location.host + "/" + this.ifra.contentWindow.location.pathname);
1014
1015         this.gst.abort();
1016         if (this.watchdog_hdl != null) {
1017             clearTimeout(this.watchdog_hdl);
1018             this.watchdog_hdl = null;
1019         }
1020
1021         this.restart_n++;
1022         this.log("hs::reload");
1023         this.watchable = false;
1024         if (this.transp != null) {
1025             this.transp.destroy();
1026             delete this.transp;
1027             this.transp = null;
1028         }
1029     },
1030
1031     reload: function () {
1032         this.abort();
1033         this.start(null);
1034     },
1035
1036     log: function (s) {
1037         if (this.console != null) {
1038             return (this.console.log(s));
1039         }
1040     }
1041 }