web/xynt-streaming.js

   1 // old targetpage == page and moved into start method
   2
   3 //
   4 // CLASS transport_xhr
   5 //
   6 function transport_xhr(doc, xynt_streaming, page)
   7 {
   8     this.doc = doc;
   9     this.xynt_streaming = xynt_streaming;
  10     this.xhr = createXMLHttpRequest();
  11     this.xhr.open('GET', page);
  12
  13     var self = this;
  14     this.xhr.onreadystatechange = function () { self.xhr_cb(); };
  15     this.xhr.send(null);
  16
  17     this.stopped = false;
  18 }
  19
  20 transport_xhr.prototype = {
  21     doc: null,
  22     xynt_streaming: "ready",
  23     xhr: null,
  24     stopped: true,
  25
  26     ctx_old: "",
  27     ctx_old_len: 0,
  28     ctx_new: null,
  29
  30     // script_clean: 0,
  31
  32     destroy: function () { /* public */
  33         if (this.xhr != null) {
  34             this.xhr_abort();
  35         }
  36         delete this.xhr;
  37     },
  38
  39     xhr_cb: function () {
  40         var ret;
  41
  42         if (this.xhr.readyState == 4) {
  43             // console.log("SS: "+safestatus(xhr));
  44
  45             // NOTE: delay management later
  46             // try {
  47             //     if ((ret = safestatus(this.xhr)) == 200) {
  48             //         this.delay = 0;
  49             //         // console.log("del a null "+this.delayed);
  50             //     } else if (ret != -1) {
  51             //         this.delay = 5000;
  52             //         this.hbit('X');
  53             //         // alert('There was a problem with the request.' + ret);
  54             //     }
  55             // } catch(b) {};
  56
  57             // this.delayed = null;
  58             this.stopped = true;
  59         }
  60     },
  61
  62     xhr_abort: function() {
  63         if (this.xhr != null) {
  64             this.xhr.abort();
  65         }
  66     },
  67
  68     xstr_is_init: function () { /* public */
  69         try {
  70             if (this.xhr.responseText != null) {
  71                 this.ctx_new = this.xhr.responseText;
  72             }
  73         }
  74         catch (e) {
  75         }
  76
  77         return (this.ctx_new != null);
  78     },
  79
  80     /* only after a successfull is_initialized call */
  81     xstr_is_ready: function () { /* public */
  82         return (this.xynt_streaming == "ready");
  83     },
  84
  85     xstr_set: function () { /* public */
  86         // already set
  87     },
  88
  89     ctx_new_is_set: function () { /* public */
  90         return (this.ctx_new != null);
  91     },
  92
  93     ctx_new_curlen_get: function () { /* public */
  94         return (this.ctx_new.length);
  95     },
  96
  97     ctx_new_getchar: function(idx) { /* public */
  98         return (this.ctx_new[idx]);
  99     },
 100
 101     ctx_old_len_is_set: function () { /* public */
 102         return (true);
 103     },
 104
 105     ctx_old_len_get: function () { /* public */
 106         return (this.ctx_old_len);
 107     },
 108
 109     ctx_old_len_set: function (len) { /* public */
 110         this.ctx_old_len = len;
 111     },
 112
 113     ctx_old_len_add: function (len) { /* public */
 114         this.ctx_old_len += len;
 115     },
 116
 117     new_part: function () { /* public */
 118         return (this.ctx_new.substr(this.ctx_old_len));
 119     },
 120
 121     scrcls_set: function (step) { /* public */
 122         // this.script_clean = step;
 123     },
 124
 125     postproc: function () {
 126         if (this.stopped && !this.xstr_is_ready()) {
 127             this.xynt_streaming.reload();
 128         }
 129     }
 130 }
 131
 132 //
 133 // CLASS transport_htmlfile
 134 //
 135 function transport_htmlfile(doc, xynt_streaming, page)
 136 {
 137     this.doc = doc;
 138     this.xynt_streaming = xynt_streaming;
 139     this.transfdoc = new ActiveXObject("htmlfile");
 140     this.transfdoc.open();
 141     /*this.transfdoc.write("<html><head><script>");
 142     this.transfdoc.write("document.domain=\""+(doc.domain)+"\";");
 143     this.transfdoc.write("</"+"script></"+"head>"); */
 144     this.transfdoc.write("<html><body><iframe id='iframe'></iframe></body></html>");
 145     this.transfdoc.close();
 146
 147     this.ifra = this.transfdoc.getElementById("iframe");
 148     this.ifra.contentWindow.location.href = page;
 149     this.stopped = false;
 150 }
 151
 152 transport_htmlfile.prototype = {
 153     doc: null,
 154     xynt_streaming: null,
 155     stopped: true,
 156     ifra: null,
 157     tradoc: null,
 158
 159     destroy: function () { /* public */
 160         if (this.ifra != null) {
 161         //     this.doc.body.removeChild(this.ifra);
 162         //     delete this.ifra;
 163              this.ifra = null;
 164         }
 165
 166         if (this.transfdoc) {
 167             delete this.transfdoc;
 168             this.transfdoc = null;
 169         }
 170     },
 171
 172     xstr_is_init: function () { /* public */
 173         return (typeof(this.ifra.contentWindow.xynt_streaming) != 'undefined');
 174     },
 175
 176     /* only after a successfull is_initialized call */
 177     xstr_set: function () { /* public */
 178         if (this.ifra.contentWindow.xynt_streaming == "ready") {
 179             this.ifra.contentWindow.xynt_streaming = this.xynt_streaming;
 180             return (true);
 181         }
 182         else if (this.ifra.contentWindow.xynt_streaming == this.xynt_streaming) {
 183             return (true);
 184         }
 185         else {
 186             return (false);
 187         }
 188     },
 189
 190     ctx_new_is_set: function () { /* public */
 191         return (typeof(this.ifra.contentWindow.ctx_new) != 'undefined');
 192     },
 193
 194     ctx_new_curlen_get: function () { /* public */
 195         return (this.ifra.contentWindow.ctx_new.length);
 196     },
 197
 198     ctx_new_getchar: function(idx) { /* public */
 199     },
 200
 201     ctx_old_len_is_set: function () { /* public */
 202         return (typeof(this.ifra.contentWindow.ctx_old_len) != 'undefined');
 203     },
 204
 205     ctx_old_len_get: function () { /* public */
 206         return (this.ifra.contentWindow.ctx_old_len);
 207     },
 208
 209     ctx_old_len_set: function (len) { /* public */
 210         this.ifra.contentWindow.ctx_old_len = len;
 211     },
 212
 213     ctx_old_len_add: function (len) { /* public */
 214         this.ifra.contentWindow.ctx_old_len += len;
 215     },
 216
 217     new_part: function () { /* public */
 218         return (this.ifra.contentWindow.ctx_new.substr(this.ifra.contentWindow.ctx_old_len));
 219     },
 220
 221     scrcls_set: function (step) { /* public */
 222         this.ifra.contentWindow.script_clean = step;
 223     },
 224
 225     postproc: function () { /* public */
 226         if (this.stopped && !this.xstr_is_ready()) {
 227             this.xynt_streaming.reload();
 228         }
 229     }
 230 }
 231
 232
 233
 234 //
 235 // CLASS transport_iframe
 236 //
 237 function transport_iframe(doc, xynt_streaming, page)
 238 {
 239     this.doc = doc;
 240     this.xynt_streaming = xynt_streaming;
 241     this.ifra = doc.createElement("iframe");
 242     this.ifra.style.visibility = "hidden";
 243     doc.body.appendChild(this.ifra);
 244     this.ifra.contentWindow.location.href = page;
 245     this.stopped = false;
 246 }
 247
 248 transport_iframe.prototype = {
 249     doc: null,
 250     xynt_streaming: null,
 251     stopped: true,
 252     ifra: null,
 253
 254     destroy: function () { /* public */
 255         try {
 256             if (this.ifra != null) {
 257                 // NOTE:  on Opera this remove child crash js if called from
 258                 //        inside of the iframe, on IE on Windows without
 259                 //        it stream abort fails.
 260                 //        the problem is fixed setting into the iframe's onload
 261                 //        function the stopped attribute to true and delegate
 262                 //        postproc() fired by xynt_streaming watchdog()
 263                 this.doc.body.removeChild(this.ifra);
 264                 delete this.ifra;
 265                 this.ifra = null;
 266             }
 267         } catch (b) {
 268             alert("destroy exception catched");
 269         }
 270     },
 271
 272     xstr_is_init: function () { /* public */
 273         return (typeof(this.ifra.contentWindow.xynt_streaming) != 'undefined');
 274     },
 275
 276     /* only after a successfull is_initialized call */
 277     xstr_is_ready: function () { /* public */
 278         return (this.ifra.contentWindow.xynt_streaming == "ready");
 279     },
 280
 281     /* only after a successfull is_initialized call */
 282     xstr_set: function () { /* public */
 283         if (this.ifra.contentWindow.xynt_streaming == "ready") {
 284             this.ifra.contentWindow.xynt_streaming = this.xynt_streaming;
 285             return (true);
 286         }
 287         else if (this.ifra.contentWindow.xynt_streaming == this.xynt_streaming) {
 288             return (true);
 289         }
 290         else {
 291             return (false);
 292         }
 293     },
 294
 295
 296     /* only after a successfull is_ready call to be sure the accessibility of the var */
 297     xstr_set_old: function (xynt_streaming) { /* public */
 298         this.ifra.contentWindow.xynt_streaming = xynt_streaming;
 299     },
 300
 301     ctx_new_is_set: function () { /* public */
 302         return (typeof(this.ifra.contentWindow.ctx_new) != 'undefined');
 303     },
 304
 305     ctx_new_curlen_get: function () { /* public */
 306         return (this.ifra.contentWindow.ctx_new.length);
 307     },
 308
 309     ctx_new_getchar: function(idx) { /* public */
 310     },
 311
 312     ctx_old_len_is_set: function () { /* public */
 313         return (typeof(this.ifra.contentWindow.ctx_old_len) != 'undefined');
 314     },
 315
 316     ctx_old_len_get: function () { /* public */
 317         return (this.ifra.contentWindow.ctx_old_len);
 318     },
 319
 320     ctx_old_len_set: function (len) { /* public */
 321         this.ifra.contentWindow.ctx_old_len = len;
 322     },
 323
 324     ctx_old_len_add: function (len) { /* public */
 325         this.ifra.contentWindow.ctx_old_len += len;
 326     },
 327
 328     new_part: function () { /* public */
 329         return (this.ifra.contentWindow.ctx_new.substr(this.ifra.contentWindow.ctx_old_len));
 330     },
 331
 332     scrcls_set: function (step) { /* public */
 333         this.ifra.contentWindow.script_clean = step;
 334     },
 335
 336     postproc: function () { /* public */
 337         if (this.stopped && !this.xstr_is_ready()) {
 338             this.xynt_streaming.reload();
 339         }
 340     }
 341 }
 342
 343 function xynt_streaming(win, transp_type, console, gst, from, cookiename, sess, sandbox, page, cmdproc)
 344 {
 345     this.win = win;
 346     this.transp_type = transp_type;
 347     this.console = console;
 348     this.gst = gst;
 349     this.from = from;
 350     this.cookiename = cookiename;
 351     this.sess = sess;
 352     this.sandbox = sandbox;
 353     this.page = page;
 354     this.cmdproc = cmdproc;
 355     // this.cmdproc = function(com){/* console.log("COM: "+com); */ eval(com);}
 356
 357     this.doc = win.document;
 358     this.keepalive_old = -1;
 359     this.keepalive_new = -1;
 360 }
 361
 362 xynt_streaming.prototype = {
 363     win:               null,
 364     transp_type:       null,
 365     transp:            null,
 366     console:           null,
 367     gst:               null,
 368     from:              null,
 369     cookiename:        null,
 370     sess:              null,
 371     sandbox:           null,
 372     page:              null,
 373     cmdproc:           null,
 374
 375     doc:               null,
 376     cookiepath: "/brisk/",
 377     watchdog_hdl:      null,
 378     hbit:              null,
 379     keepalive_old:    -1,
 380     keepalive_new:    -1,
 381     keepalives_equal:  0,
 382     /* NOTE: right watch_timeout value to 100, for devel reasons use 1000 or more */
 383     /* restart after  4 * 40 * 100 millisec if server ping is missing => 16secs */
 384     keepalives_eq_max: 4,
 385     watchdog_checktm:  40,
 386     // FIXME watchdog_timeout:  100,
 387     watchdog_timeout:  100,
 388     watchdog_ct:       0,
 389     watchable:         false,
 390     restart_n:         0,
 391     comm_match:        /_*@BEGIN@(.*?)@END@/g,
 392     comm_clean:        /_*@BEGIN@(.*?)@END@/,
 393     stream:            "",
 394     the_end:           false,
 395
 396     start: function() { /* public */
 397         if (this.the_end)
 398             return;
 399
 400         createCookie(this.cookiename, sess, 24*365, this.cookiepath);
 401         // alert("start");
 402         this.log("xynt_streaming:start restart: "+this.restart_n);
 403         this.keepalives_equal = 0;
 404
 405         // page arrangement
 406         this.page = url_complete(this.win.location.href, this.page);
 407         // stat, subst, this.gst.st
 408
 409         this.page = url_append_args(this.page, "sess", this.sess, "stat", stat, "subst", subst, "step", this.gst.st, "from", this.from);
 410         this.log(this.page);
 411
 412         // transport instantiation
 413         if (this.transp_type == "xhr") {
 414             this.page = url_append_args(this.page, "transp", "xhr");
 415             this.transp = new transport_xhr(this.doc, this, this.page);
 416         }
 417         else if (this.transp_type == "iframe") {
 418             this.page = url_append_args(this.page, "transp", "iframe");
 419             this.transp = new transport_iframe(this.doc, this, this.page);
 420         }
 421         else if (this.transp_type == "htmlfile") {
 422             this.page = url_append_args(this.page, "transp", "htmlfile");
 423             this.transp = new transport_htmlfile(this.doc, this, this.page);
 424         }
 425         else
 426             return;
 427
 428         // watchdog setting
 429         this.watchdog_ct  = 0;
 430         if (!this.the_end) {
 431             this.watchdog_hdl = setTimeout(function(obj) { obj.log("tout1"); obj.watchdog(); }, this.watchdog_timeout, this);
 432         }
 433     },
 434
 435     stop: function() {
 436         this.the_end = true;
 437         this.abort();
 438     },
 439
 440     hbit_set: function (hbit) {
 441         this.hbit = hbit;
 442     },
 443
 444     watchdog: function () {
 445         // alert("watchdog");
 446         var i, again;
 447         var comm_newpart, comm_len, comm_arr;
 448         var ctx_new_len;
 449
 450         if (this.sandbox != null) {
 451             // from old: var zug = "POLL sess = "+sess+" stat = "+stat+" subst = "+subst+" step = "+this.gst.st+" step_loc = "+this.gst.st_loc+" step_loc_new = "+this.gst.st_loc_new+" STOP: "+this.stopped;
 452             var zug = "WATCHDOG  sess = ["+this.sess+"]  step = "+this.gst.st+" step_loc = "+this.gst.st_loc+" step_loc_new = "+this.gst.st_loc_new;
 453             if (zug != this.sandbox.innerHTML)
 454                 this.sandbox.innerHTML = zug;
 455         }
 456
 457         // WATCHDOGING THE CONNECTION
 458         this.log("hs::watchdog: start, cur equal times: "+this.keepalives_equal);
 459         if (!this.watchable) {
 460             do {
 461                 try{
 462                     // if (typeof(this.ifra.contentWindow.xynt_streaming) == 'undefined')
 463                     if (!this.transp.xstr_is_init()) {
 464                         this.log("hs::watchdog: xstr_is_init = false");
 465                         break;
 466                     }
 467                 }
 468                 catch(b) {
 469                     this.log("hs::watchdog: exception");
 470                     break;
 471                 }
 472
 473                 /*
 474                   on IE7 the the window frame scope is cleaned after the href is set, so we wait
 475                   for a well know variable value before assign this object value to it (OO is a passion)
 476                 */
 477                 // if (this.ifra.contentWindow.xynt_streaming == "ready") {
 478                 if (this.transp.xstr_set()) {
 479                     // this.ifra.contentWindow.xynt_streaming = this;
 480                     this.watchable = true;
 481                     this.watchdog_ct = 0;
 482                     this.log("hs::watchdog: watchable = yes");
 483                 }
 484             } while (false);
 485         }
 486         if ( (this.watchdog_ct % this.watchdog_checktm) == 0) {
 487             this.log("hs::watchdog: this.keepalive_old: "+this.keepalive_old+" this.keepalive_new: "+this.keepalive_new);
 488             if (this.keepalive_old == this.keepalive_new) {
 489                 this.keepalives_equal++;
 490             }
 491             else {
 492                 this.keepalive_old = this.keepalive_new;
 493                 this.keepalives_equal = 0;
 494             }
 495
 496             if (this.keepalives_equal >= this.keepalives_eq_max) {
 497                 this.log("hs::watchdog: MAX ACHIEVED "+this.keepalives_equal);
 498                 this.reload();
 499                 // alert("watchdog return reload");
 500                 return;
 501             }
 502         }
 503
 504         // PICK COMMANDS FROM STREAM
 505         do {
 506             // alert("do--while begin ["+again+"]");
 507             // CHECK: maybe again here isn't needed
 508             again = 0;
 509             try {
 510                 /* if (typeof(this.ifra.contentWindow.ctx_new)     == 'undefined' ||
 511                    typeof(this.ifra.contentWindow.ctx_old_len) == 'undefined') */
 512                 if (!this.transp.ctx_new_is_set() || !this.transp.ctx_old_len_is_set())
 513                     break;
 514             }
 515             catch(b) {
 516                 break;
 517             }
 518
 519             // ctx_new_len = this.ifra.contentWindow.ctx_new.length;
 520             ctx_new_len = this.transp.ctx_new_curlen_get();
 521             // if (ctx_new_len <= this.ifra.contentWindow.ctx_old_len) {
 522             if (ctx_new_len <= this.transp.ctx_old_len_get()) {
 523                 break;
 524             }
 525             this.log("new: "+ ctx_new_len + "  old: "+this.transp.ctx_old_len_get());
 526             this.keepalive_new++;
 527             // alert("pre-loop 1");
 528             for (i = this.transp.ctx_old_len_get() ; i < ctx_new_len ; i++) {
 529                 // if (this.ifra.contentWindow.ctx_new.charAt(i) != '_') {
 530                 if (this.transp.ctx_new_getchar(i) != '_') {
 531                     // this.log("ctx_new.char(i) != '_' ["+this.ifra.contentWindow.ctx_new.charAt(i)+"]");
 532                     break;
 533                 }
 534                 // else {
 535                 //     this.log("ctx_new.charAt(i) == '_'");
 536                 // }
 537             }
 538             // this.ifra.contentWindow.ctx_old_len = i;
 539             this.transp.ctx_old_len_set(i);
 540             if (i == ctx_new_len) {
 541                 this.log("old_len == i");
 542                 break;
 543             }
 544             else {
 545                 this.log("old_len != i: "+i);
 546             }
 547             // alert("do--while middle ["+this.ifra.contentWindow.ctx_old_len+"]");
 548
 549             comm_newpart = this.transp.new_part();
 550             this.log("COM_NEWPART: ["+comm_newpart+"]");
 551             comm_len = 0;
 552             comm_arr = comm_newpart.match(this.comm_match);
 553
 554             // alert("do--while middle2 ["+again+"]");
 555             if (comm_arr) {
 556                 var comm_arr_len = comm_arr.length;
 557                 for (i = 0 ; i < comm_arr_len ; i++) {
 558                     var temp = comm_arr[i].replace(this.comm_clean,"$1").split("|");
 559                     this.gst.comms = this.gst.comms.concat(temp);
 560                     comm_len += comm_arr[i].length;
 561                 }
 562                 again = 1;
 563             }
 564             // this.ifra.contentWindow.ctx_old_len += comm_len;
 565             this.transp.ctx_old_len_add(comm_len);
 566             // this.ifra.contentWindow.script_clean = this.gst.st;
 567             this.transp.scrcls_set(this.gst.st);
 568             // alert("do--while end ["+again+"]");
 569         } while (again);
 570
 571         // alert("post while");
 572         // EXECUTION OF STREAM COMMANDS
 573         do {
 574             again = 0;
 575             //MOP ?? xhrrestart = 0;
 576             if (this.gst.st_loc < this.gst.st_loc_new) {
 577                 // there is some slow actions running
 578                 break;
 579             }
 580             else if (this.gst.comms.length > 0) {
 581                 var singlecomm;
 582
 583                 singlecomm = this.gst.comms.shift();
 584                 // alert("EXE"+gugu);
 585                 // $("xhrdeltalog").innerHTML = "EVALL: "+singlecomm.replace("<", "&lt;", "g"); +"<br>";
 586                 //xx this.hbit("+");
 587
 588                 // alert("SINGLE: ["+singlecomm+"]");
 589                 this.cmdproc(singlecomm);
 590                 again = 1;
 591             }
 592         } while (again);
 593         this.watchdog_ct++;
 594         if (!this.the_end) {
 595             this.transp.postproc();
 596             this.watchdog_hdl = setTimeout(function(obj) { /* obj.log("tout2"); */ obj.watchdog(); }, this.watchdog_timeout, this);
 597         }
 598         // alert("watchdog return normal");
 599
 600         return;
 601     },
 602
 603     //
 604     // moved to xynt-streaming-ifra as push()
 605     //
 606     // keepalive: function (s) {
 607     //     this.log("hs::keepalive");
 608     //     if (s != null) {
 609     //         this.log(s);
 610     //         this.ifra.contentWindow.ctx_new += "@BEGIN@"+s+"@END@";
 611     //     }
 612     //     else {
 613     //         this.ifra.contentWindow.ctx_new += "_";
 614     //     }
 615     //     // this.keepalive_new++;
 616     // },
 617
 618     abort: function () { /* public */
 619         // this.log("PATH: "+this.ifra.contentWindow.location.protocol + "://" + this.ifra.contentWindow.location.host + "/" + this.ifra.contentWindow.location.pathname);
 620
 621         this.gst.abort();
 622         if (this.watchdog_hdl != null) {
 623             clearTimeout(this.watchdog_hdl);
 624             this.watchdog_hdl = null;
 625         }
 626
 627         this.restart_n++;
 628         this.log("hs::reload");
 629         this.watchable = false;
 630         if (this.transp != null) {
 631             this.transp.destroy();
 632             delete this.transp;
 633             this.transp = null;
 634         }
 635     },
 636
 637     reload: function () {
 638         this.abort();
 639         this.start(null);
 640     },
 641
 642     log: function (s) {
 643         if (this.console != null) {
 644             return (this.console.log(s));
 645         }
 646     }
 647 }