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