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 }
 150
 151 transport_htmlfile.prototype = {
 152     doc: null,
 153     xynt_streaming: null,
 154     ifra: null,
 155     tradoc: null,
 156
 157     destroy: function () { /* public */
 158         if (this.ifra != null) {
 159         //     this.doc.body.removeChild(this.ifra);
 160         //     delete this.ifra;
 161              this.ifra = null;
 162         }
 163
 164         if (this.transfdoc) {
 165             delete this.transfdoc;
 166             this.transfdoc = null;
 167         }
 168     },
 169
 170     xstr_is_init: function () { /* public */
 171         return (typeof(this.ifra.contentWindow.xynt_streaming) != 'undefined');
 172     },
 173
 174     /* only after a successfull is_initialized call */
 175     xstr_set: function () { /* public */
 176         if (this.ifra.contentWindow.xynt_streaming == "ready") {
 177             this.ifra.contentWindow.xynt_streaming = this.xynt_streaming;
 178             return (true);
 179         }
 180         else if (this.ifra.contentWindow.xynt_streaming == this.xynt_streaming) {
 181             return (true);
 182         }
 183         else {
 184             return (false);
 185         }
 186     },
 187
 188     ctx_new_is_set: function () { /* public */
 189         return (typeof(this.ifra.contentWindow.ctx_new) != 'undefined');
 190     },
 191
 192     ctx_new_curlen_get: function () { /* public */
 193         return (this.ifra.contentWindow.ctx_new.length);
 194     },
 195
 196     ctx_new_getchar: function(idx) { /* public */
 197     },
 198
 199     ctx_old_len_is_set: function () { /* public */
 200         return (typeof(this.ifra.contentWindow.ctx_old_len) != 'undefined');
 201     },
 202
 203     ctx_old_len_get: function () { /* public */
 204         return (this.ifra.contentWindow.ctx_old_len);
 205     },
 206
 207     ctx_old_len_set: function (len) { /* public */
 208         this.ifra.contentWindow.ctx_old_len = len;
 209     },
 210
 211     ctx_old_len_add: function (len) { /* public */
 212         this.ifra.contentWindow.ctx_old_len += len;
 213     },
 214
 215     new_part: function () { /* public */
 216         return (this.ifra.contentWindow.ctx_new.substr(this.ifra.contentWindow.ctx_old_len));
 217     },
 218
 219     scrcls_set: function (step) { /* public */
 220         this.ifra.contentWindow.script_clean = step;
 221     },
 222
 223     postproc: function () {
 224     }
 225 }
 226
 227
 228
 229 //
 230 // CLASS transport_iframe
 231 //
 232 function transport_iframe(doc, xynt_streaming, page)
 233 {
 234     this.doc = doc;
 235     this.xynt_streaming = xynt_streaming;
 236     this.ifra = doc.createElement("iframe");
 237     this.ifra.style.visibility = "hidden";
 238     doc.body.appendChild(this.ifra);
 239     this.ifra.contentWindow.location.href = page;
 240 }
 241
 242 transport_iframe.prototype = {
 243     doc: null,
 244     xynt_streaming: null,
 245     ifra: null,
 246
 247     destroy: function () { /* public */
 248         try {
 249             if (this.ifra != null) {
 250                 // FIXME: with opera on win this remove child crash js so is
 251                 //        commented AND NOWWW ????
 252                 this.doc.body.removeChild(this.ifra);
 253                 delete this.ifra;
 254                 this.ifra = null;
 255             }
 256         } catch (b) {
 257             alert("destroy exception catched");
 258         }
 259     },
 260
 261     xstr_is_init: function () { /* public */
 262         return (typeof(this.ifra.contentWindow.xynt_streaming) != 'undefined');
 263     },
 264
 265     /* only after a successfull is_initialized call */
 266     xstr_is_ready: function () { /* public */
 267         return (this.ifra.contentWindow.xynt_streaming == "ready");
 268     },
 269
 270     /* only after a successfull is_initialized call */
 271     xstr_set: function () { /* public */
 272         if (this.ifra.contentWindow.xynt_streaming == "ready") {
 273             this.ifra.contentWindow.xynt_streaming = this.xynt_streaming;
 274             return (true);
 275         }
 276         else if (this.ifra.contentWindow.xynt_streaming == this.xynt_streaming) {
 277             return (true);
 278         }
 279         else {
 280             return (false);
 281         }
 282     },
 283
 284
 285     /* only after a successfull is_ready call to be sure the accessibility of the var */
 286     xstr_set_old: function (xynt_streaming) { /* public */
 287         this.ifra.contentWindow.xynt_streaming = xynt_streaming;
 288     },
 289
 290     ctx_new_is_set: function () { /* public */
 291         return (typeof(this.ifra.contentWindow.ctx_new) != 'undefined');
 292     },
 293
 294     ctx_new_curlen_get: function () { /* public */
 295         return (this.ifra.contentWindow.ctx_new.length);
 296     },
 297
 298     ctx_new_getchar: function(idx) { /* public */
 299     },
 300
 301     ctx_old_len_is_set: function () { /* public */
 302         return (typeof(this.ifra.contentWindow.ctx_old_len) != 'undefined');
 303     },
 304
 305     ctx_old_len_get: function () { /* public */
 306         return (this.ifra.contentWindow.ctx_old_len);
 307     },
 308
 309     ctx_old_len_set: function (len) { /* public */
 310         this.ifra.contentWindow.ctx_old_len = len;
 311     },
 312
 313     ctx_old_len_add: function (len) { /* public */
 314         this.ifra.contentWindow.ctx_old_len += len;
 315     },
 316
 317     new_part: function () { /* public */
 318         return (this.ifra.contentWindow.ctx_new.substr(this.ifra.contentWindow.ctx_old_len));
 319     },
 320
 321     scrcls_set: function (step) { /* public */
 322         this.ifra.contentWindow.script_clean = step;
 323     },
 324
 325     postproc: function () {
 326     }
 327 }
 328
 329 function xynt_streaming(win, transp_type, console, gst, from, cookiename, sess, sandbox, page, cmdproc)
 330 {
 331     this.win = win;
 332     this.transp_type = transp_type;
 333     this.console = console;
 334     this.gst = gst;
 335     this.from = from;
 336     this.cookiename = cookiename;
 337     this.sess = sess;
 338     this.sandbox = sandbox;
 339     this.page = page;
 340     this.cmdproc = cmdproc;
 341     // this.cmdproc = function(com){/* console.log("COM: "+com); */ eval(com);}
 342
 343     this.doc = win.document;
 344     this.keepalive_old = -1;
 345     this.keepalive_new = -1;
 346 }
 347
 348 xynt_streaming.prototype = {
 349     win:               null,
 350     transp_type:       null,
 351     transp:            null,
 352     console:           null,
 353     gst:               null,
 354     from:              null,
 355     cookiename:        null,
 356     sess:              null,
 357     sandbox:           null,
 358     page:              null,
 359     cmdproc:           null,
 360
 361     doc:               null,
 362     cookiepath: "/brisk/",
 363     watchdog_hdl:      null,
 364     hbit:              null,
 365     keepalive_old:    -1,
 366     keepalive_new:    -1,
 367     keepalives_equal:  0,
 368     /* NOTE: right watch_timeout value to 100, for devel reasons use 1000 or more */
 369     /* restart after  4 * 40 * 100 millisec if server ping is missing => 16secs */
 370     keepalives_eq_max: 4,
 371     watchdog_checktm:  40,
 372     // FIXME watchdog_timeout:  100,
 373     watchdog_timeout:  100,
 374     watchdog_ct:       0,
 375     watchable:         false,
 376     restart_n:         0,
 377     comm_match:        /_*@BEGIN@(.*?)@END@/g,
 378     comm_clean:        /_*@BEGIN@(.*?)@END@/,
 379     stream:            "",
 380     the_end:           false,
 381
 382     start: function() { /* public */
 383         if (this.the_end)
 384             return;
 385
 386         createCookie(this.cookiename, sess, 24*365, this.cookiepath);
 387         // alert("start");
 388         this.log("xynt_streaming:start restart: "+this.restart_n);
 389         this.keepalives_equal = 0;
 390
 391         // page arrangement
 392         this.page = url_complete(this.win.location.href, this.page);
 393         // stat, subst, this.gst.st
 394
 395         this.page = url_append_args(this.page, "sess", this.sess, "stat", stat, "subst", subst, "step", this.gst.st, "from", this.from);
 396         this.log(this.page);
 397
 398         // transport instantiation
 399         if (this.transp_type == "xhr") {
 400             this.page = url_append_args(this.page, "transp", "xhr");
 401             this.transp = new transport_xhr(this.doc, this, this.page);
 402         }
 403         else if (this.transp_type == "iframe") {
 404             this.page = url_append_args(this.page, "transp", "iframe");
 405             this.transp = new transport_iframe(this.doc, this, this.page);
 406         }
 407         else if (this.transp_type == "htmlfile") {
 408             this.page = url_append_args(this.page, "transp", "htmlfile");
 409             this.transp = new transport_htmlfile(this.doc, this, this.page);
 410         }
 411         else
 412             return;
 413
 414         // watchdog setting
 415         this.watchdog_ct  = 0;
 416         if (!this.the_end) {
 417             this.watchdog_hdl = setTimeout(function(obj) { obj.log("tout1"); obj.watchdog(); }, this.watchdog_timeout, this);
 418         }
 419     },
 420
 421     stop: function() {
 422         this.the_end = true;
 423         this.abort();
 424     },
 425
 426     hbit_set: function (hbit) {
 427         this.hbit = hbit;
 428     },
 429
 430     watchdog: function () {
 431         // alert("watchdog");
 432         var i, again;
 433         var comm_newpart, comm_len, comm_arr;
 434         var ctx_new_len;
 435
 436         if (this.sandbox != null) {
 437             // 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;
 438             var zug = "WATCHDOG  sess = ["+this.sess+"]  step = "+this.gst.st+" step_loc = "+this.gst.st_loc+" step_loc_new = "+this.gst.st_loc_new;
 439             if (zug != this.sandbox.innerHTML)
 440                 this.sandbox.innerHTML = zug;
 441         }
 442
 443         // WATCHDOGING THE CONNECTION
 444         this.log("hs::watchdog: start, cur equal times: "+this.keepalives_equal);
 445         if (!this.watchable) {
 446             do {
 447                 try{
 448                     // if (typeof(this.ifra.contentWindow.xynt_streaming) == 'undefined')
 449                     if (!this.transp.xstr_is_init()) {
 450                         this.log("hs::watchdog: xstr_is_init = false");
 451                         break;
 452                     }
 453                 }
 454                 catch(b) {
 455                     this.log("hs::watchdog: exception");
 456                     break;
 457                 }
 458
 459                 /*
 460                   on IE7 the the window frame scope is cleaned after the href is set, so we wait
 461                   for a well know variable value before assign this object value to it (OO is a passion)
 462                 */
 463                 // if (this.ifra.contentWindow.xynt_streaming == "ready") {
 464                 if (this.transp.xstr_set()) {
 465                     // this.ifra.contentWindow.xynt_streaming = this;
 466                     this.watchable = true;
 467                     this.watchdog_ct = 0;
 468                     this.log("hs::watchdog: watchable = yes");
 469                 }
 470             } while (false);
 471         }
 472         if ( (this.watchdog_ct % this.watchdog_checktm) == 0) {
 473             this.log("hs::watchdog: this.keepalive_old: "+this.keepalive_old+" this.keepalive_new: "+this.keepalive_new);
 474             if (this.keepalive_old == this.keepalive_new) {
 475                 this.keepalives_equal++;
 476             }
 477             else {
 478                 this.keepalive_old = this.keepalive_new;
 479                 this.keepalives_equal = 0;
 480             }
 481
 482             if (this.keepalives_equal >= this.keepalives_eq_max) {
 483                 this.log("hs::watchdog: MAX ACHIEVED "+this.keepalives_equal);
 484                 this.reload();
 485                 // alert("watchdog return reload");
 486                 return;
 487             }
 488         }
 489
 490         // PICK COMMANDS FROM STREAM
 491         do {
 492             // alert("do--while begin ["+again+"]");
 493             // CHECK: maybe again here isn't needed
 494             again = 0;
 495             try {
 496                 /* if (typeof(this.ifra.contentWindow.ctx_new)     == 'undefined' ||
 497                    typeof(this.ifra.contentWindow.ctx_old_len) == 'undefined') */
 498                 if (!this.transp.ctx_new_is_set() || !this.transp.ctx_old_len_is_set())
 499                     break;
 500             }
 501             catch(b) {
 502                 break;
 503             }
 504
 505             // ctx_new_len = this.ifra.contentWindow.ctx_new.length;
 506             ctx_new_len = this.transp.ctx_new_curlen_get();
 507             // if (ctx_new_len <= this.ifra.contentWindow.ctx_old_len) {
 508             if (ctx_new_len <= this.transp.ctx_old_len_get()) {
 509                 break;
 510             }
 511             this.log("new: "+ ctx_new_len + "  old: "+this.transp.ctx_old_len_get());
 512             this.keepalive_new++;
 513             // alert("pre-loop 1");
 514             for (i = this.transp.ctx_old_len_get() ; i < ctx_new_len ; i++) {
 515                 // if (this.ifra.contentWindow.ctx_new.charAt(i) != '_') {
 516                 if (this.transp.ctx_new_getchar(i) != '_') {
 517                     // this.log("ctx_new.char(i) != '_' ["+this.ifra.contentWindow.ctx_new.charAt(i)+"]");
 518                     break;
 519                 }
 520                 // else {
 521                 //     this.log("ctx_new.charAt(i) == '_'");
 522                 // }
 523             }
 524             // this.ifra.contentWindow.ctx_old_len = i;
 525             this.transp.ctx_old_len_set(i);
 526             if (i == ctx_new_len) {
 527                 this.log("old_len == i");
 528                 break;
 529             }
 530             else {
 531                 this.log("old_len != i: "+i);
 532             }
 533             // alert("do--while middle ["+this.ifra.contentWindow.ctx_old_len+"]");
 534
 535             comm_newpart = this.transp.new_part();
 536             this.log("COM_NEWPART: ["+comm_newpart+"]");
 537             comm_len = 0;
 538             comm_arr = comm_newpart.match(this.comm_match);
 539
 540             // alert("do--while middle2 ["+again+"]");
 541             if (comm_arr) {
 542                 var comm_arr_len = comm_arr.length;
 543                 for (i = 0 ; i < comm_arr_len ; i++) {
 544                     var temp = comm_arr[i].replace(this.comm_clean,"$1").split("|");
 545                     this.gst.comms = this.gst.comms.concat(temp);
 546                     comm_len += comm_arr[i].length;
 547                 }
 548                 again = 1;
 549             }
 550             // this.ifra.contentWindow.ctx_old_len += comm_len;
 551             this.transp.ctx_old_len_add(comm_len);
 552             // this.ifra.contentWindow.script_clean = this.gst.st;
 553             this.transp.scrcls_set(this.gst.st);
 554             // alert("do--while end ["+again+"]");
 555         } while (again);
 556
 557         // alert("post while");
 558         // EXECUTION OF STREAM COMMANDS
 559         do {
 560             again = 0;
 561             //MOP ?? xhrrestart = 0;
 562             if (this.gst.st_loc < this.gst.st_loc_new) {
 563                 // there is some slow actions running
 564                 break;
 565             }
 566             else if (this.gst.comms.length > 0) {
 567                 var singlecomm;
 568
 569                 singlecomm = this.gst.comms.shift();
 570                 // alert("EXE"+gugu);
 571                 // $("xhrdeltalog").innerHTML = "EVALL: "+singlecomm.replace("<", "&lt;", "g"); +"<br>";
 572                 //xx this.hbit("+");
 573
 574                 // alert("SINGLE: ["+singlecomm+"]");
 575                 this.cmdproc(singlecomm);
 576                 again = 1;
 577             }
 578         } while (again);
 579         this.watchdog_ct++;
 580         if (!this.the_end) {
 581             this.transp.postproc();
 582             this.watchdog_hdl = setTimeout(function(obj) { /* obj.log("tout2"); */ obj.watchdog(); }, this.watchdog_timeout, this);
 583         }
 584         // alert("watchdog return normal");
 585
 586         return;
 587     },
 588
 589     //
 590     // moved to xynt-streaming-ifra as push()
 591     //
 592     // keepalive: function (s) {
 593     //     this.log("hs::keepalive");
 594     //     if (s != null) {
 595     //         this.log(s);
 596     //         this.ifra.contentWindow.ctx_new += "@BEGIN@"+s+"@END@";
 597     //     }
 598     //     else {
 599     //         this.ifra.contentWindow.ctx_new += "_";
 600     //     }
 601     //     // this.keepalive_new++;
 602     // },
 603
 604     abort: function () { /* public */
 605         // this.log("PATH: "+this.ifra.contentWindow.location.protocol + "://" + this.ifra.contentWindow.location.host + "/" + this.ifra.contentWindow.location.pathname);
 606
 607         this.gst.abort();
 608         if (this.watchdog_hdl != null) {
 609             clearTimeout(this.watchdog_hdl);
 610             this.watchdog_hdl = null;
 611         }
 612
 613         this.restart_n++;
 614         this.log("hs::reload");
 615         this.watchable = false;
 616         if (this.transp != null) {
 617             this.transp.destroy();
 618             delete this.transp;
 619             this.transp = null;
 620         }
 621     },
 622
 623     reload: function () {
 624         this.abort();
 625         this.start(null);
 626     },
 627
 628     log: function (s) {
 629         if (this.console != null) {
 630             return (this.console.log(s));
 631         }
 632     }
 633 }