lib/functions.js.php

   1 <?php
   2 /*
   3  *  Jirafeau, your web file repository
   4  *  Copyright (C) 2015  Jerome Jutteau <j.jutteau@gmail.com>
   5  *  Copyright (C) 2015  Nicola Spanti (RyDroid) <dev@nicola-spanti.info>
   6  *
   7  *  This program is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU Affero General Public License as
   9  *  published by the Free Software Foundation, either version 3 of the
  10  *  License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Affero General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Affero General Public License
  18  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  */
  20
  21 header('Content-Type: text/javascript');
  22
  23 define('JIRAFEAU_ROOT', dirname(__FILE__) . '/../');
  24
  25 require(JIRAFEAU_ROOT . 'lib/settings.php');
  26 require(JIRAFEAU_ROOT . 'lib/functions.php');
  27 require(JIRAFEAU_ROOT . 'lib/lang.php');
  28 ?>
  29 var web_root = "<?php echo $cfg['web_root']; ?>";
  30
  31 var lang_array = <?php echo json_lang_generator(null); ?>;
  32 var lang_array_fallback = <?php echo json_lang_generator("en"); ?>;
  33
  34 function translate (expr) {
  35     if (lang_array.hasOwnProperty(expr)) {
  36         var e = lang_array[expr];
  37         if (!isEmpty(e))
  38             return e;
  39     }
  40     if (lang_array_fallback.hasOwnProperty(expr)) {
  41         var e = lang_array_fallback[expr];
  42         if (!isEmpty(e))
  43             return e;
  44     }
  45     return "FIXME: " + expr;
  46 }
  47
  48 function isEmpty(str) {
  49     return (!str || 0 === str.length);
  50 }
  51
  52 // Extend date object with format method
  53 Date.prototype.format = function(format) {
  54     format = format || 'YYYY-MM-DD hh:mm';
  55
  56     var zeropad = function(number, length) {
  57         number = number.toString();
  58         length = length || 2;
  59         while(number.length < length)
  60             number = '0' + number;
  61         return number;
  62     },
  63     formats = {
  64         YYYY: this.getFullYear(),
  65         MM: zeropad(this.getMonth() + 1),
  66         DD: zeropad(this.getDate()),
  67         hh: zeropad(this.getHours()),
  68         mm: zeropad(this.getMinutes()),
  69         O: (function() {
  70             localDate = new Date;
  71             sign = (localDate.getTimezoneOffset() > 0) ? '-' : '+';
  72             offset = Math.abs(localDate.getTimezoneOffset());
  73             hours = zeropad(Math.floor(offset / 60));
  74             minutes = zeropad(offset % 60);
  75             return sign + hours + ":" + minutes;
  76         })()
  77     },
  78     pattern = '(' + Object.keys(formats).join(')|(') + ')';
  79
  80     return format.replace(new RegExp(pattern, 'g'), function(match) {
  81         return formats[match];
  82     });
  83 };
  84
  85 function dateFromUtcString(datestring) {
  86     // matches »YYYY-MM-DD hh:mm«
  87     var m = datestring.match(/(\d+)-(\d+)-(\d+)\s+(\d+):(\d+)/);
  88     return new Date(Date.UTC(+m[1], +m[2] - 1, +m[3], +m[4], +m[5], 0));
  89 }
  90
  91 function dateFromUtcTimestamp(datetimestamp) {
  92     return new Date(parseInt(datetimestamp) * 1000)
  93 }
  94
  95 function dateToUtcString(datelocal) {
  96     return new Date(
  97         datelocal.getUTCFullYear(),
  98         datelocal.getUTCMonth(),
  99         datelocal.getUTCDate(),
 100         datelocal.getUTCHours(),
 101         datelocal.getUTCMinutes(),
 102         datelocal.getUTCSeconds()
 103     ).format();
 104 }
 105
 106 function dateToUtcTimestamp(datelocal) {
 107     return (Date.UTC(
 108         datelocal.getUTCFullYear(),
 109         datelocal.getUTCMonth(),
 110         datelocal.getUTCDate(),
 111         datelocal.getUTCHours(),
 112         datelocal.getUTCMinutes(),
 113         datelocal.getUTCSeconds()
 114     ) / 1000);
 115 }
 116
 117 function convertAllDatetimeFields() {
 118     datefields = document.getElementsByClassName('datetime')
 119     for(var i=0; i<datefields.length; i++) {
 120         dateUTC = datefields[i].getAttribute('data-datetime');
 121         datefields[i].setAttribute('title', dateUTC + ' (GMT)');
 122         datefields[i].innerHTML = dateFromUtcString(dateUTC).format('YYYY-MM-DD hh:mm (GMT O)');
 123     }
 124 }
 125
 126 function show_link (reference, delete_code, crypt_key, date)
 127 {
 128     // Upload finished
 129     document.getElementById('uploading').style.display = 'none';
 130     document.getElementById('upload').style.display = 'none';
 131     document.getElementById('upload_finished').style.display = '';
 132     document.title = "100% - <?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 133
 134     // Download page
 135     var download_link_href = 'f.php?h=' + reference;
 136     if (crypt_key.length > 0)
 137     {
 138         download_link_href += '&k=' + crypt_key;
 139     }
 140     if (!!document.getElementById('upload_finished_download_page'))
 141     {
 142         document.getElementById('upload_link').href = download_link_href;
 143         document.getElementById('upload_link_text').innerHTML = web_root + download_link_href;
 144     }
 145
 146     // Email link
 147     var filename = document.getElementById('file_select').files[0].name;
 148     var b = encodeURIComponent("Download file \"" + filename + "\":") + "%0D";
 149     b += encodeURIComponent(web_root + download_link_href) + "%0D";
 150     if (false == isEmpty(date))
 151     {
 152         b += "%0D" + encodeURIComponent("This file will be available until " + date.format('YYYY-MM-DD hh:mm (GMT O)')) + "%0D";
 153         document.getElementById('upload_link_email').href = "mailto:?body=" + b + "&subject=" + encodeURIComponent(filename);
 154     }
 155
 156     // Delete link
 157     var delete_link_href = 'f.php?h=' + reference + '&d=' + delete_code;
 158     document.getElementById('delete_link').href = delete_link_href;
 159     document.getElementById('delete_link_text').innerHTML = web_root + delete_link_href;
 160
 161     // Validity date
 162     if (isEmpty(date))
 163     {
 164         document.getElementById('date').style.display = 'none';
 165     }
 166     else {
 167         document.getElementById('date').innerHTML = '<span class="datetime" title="'
 168             + dateToUtcString(date) + ' (GMT)">'
 169             + date.format('YYYY-MM-DD hh:mm (GMT O)')
 170             + '</span>';
 171         document.getElementById('date').style.display = '';
 172     }
 173
 174     // Preview link (if allowed)
 175     if (!!document.getElementById('preview_link'))
 176     {
 177         document.getElementById('upload_finished_preview').style.display = 'none';
 178         var preview_link_href = 'f.php?h=' + reference + '&p=1';
 179         if (crypt_key.length > 0)
 180         {
 181             preview_link_href += '&k=' + crypt_key;
 182         }
 183
 184         // Test if content can be previewed
 185          type = document.getElementById('file_select').files[0].type;
 186          if (type.indexOf("image") > -1 ||
 187              type.indexOf("audio") > -1 ||
 188              type.indexOf("text") > -1 ||
 189              type.indexOf("video") > -1)
 190          {
 191             document.getElementById('preview_link').href = preview_link_href;
 192             document.getElementById('preview_link_text').innerHTML = web_root + preview_link_href;
 193             document.getElementById('upload_finished_preview').style.display = '';
 194          }
 195     }
 196
 197     // Direct download link
 198     var direct_download_link_href = 'f.php?h=' + reference + '&d=1';
 199     if (crypt_key.length > 0)
 200     {
 201         direct_download_link_href += '&k=' + crypt_key;
 202     }
 203     document.getElementById('direct_link').href = direct_download_link_href;
 204     document.getElementById('direct_link_text').innerHTML = web_root + direct_download_link_href;
 205
 206     // Hide preview and direct download link if password is set
 207     if (document.getElementById('input_key').value.length > 0)
 208     {
 209         if (!!document.getElementById('preview_link'))
 210             document.getElementById('upload_finished_preview').style.display = 'none';
 211         document.getElementById('upload_direct_download').style.display = 'none';
 212     }
 213 }
 214
 215 function show_upload_progression (percentage, speed, time_left)
 216 {
 217     document.getElementById('uploaded_percentage').innerHTML = percentage;
 218     document.getElementById('uploaded_speed').innerHTML = speed;
 219     document.getElementById('uploaded_time').innerHTML = time_left;
 220     document.title = percentage + " - <?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 221 }
 222
 223 function hide_upload_progression ()
 224 {
 225     document.getElementById('uploaded_percentage').style.display = 'none';
 226     document.getElementById('uploaded_speed').style.display = 'none';
 227     document.getElementById('uploaded_time').style.display = 'none';
 228     document.title = "<?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 229 }
 230
 231 function upload_progress (e)
 232 {
 233     if (e == undefined || e == null || !e.lengthComputable)
 234         return;
 235
 236     // Init time estimation if needed
 237     if (upload_time_estimation_total_size == 0)
 238         upload_time_estimation_total_size = e.total;
 239
 240     // Compute percentage
 241     var p = Math.round (e.loaded * 100 / e.total);
 242     var p_str = ' ';
 243     if (p != 100)
 244         p_str = p.toString() + '%';
 245     // Update estimation speed
 246     upload_time_estimation_add(e.loaded);
 247     // Get speed string
 248     var speed_str = upload_time_estimation_speed_string();
 249     speed_str = upload_speed_refresh_limiter(speed_str);
 250     // Get time string
 251     var time_str = chrono_update(upload_time_estimation_time());
 252
 253     show_upload_progression (p_str, speed_str, time_str);
 254 }
 255
 256 function control_selected_file_size(max_size, error_str)
 257 {
 258     f_size = document.getElementById('file_select').files[0].size;
 259     if (max_size > 0 && f_size > max_size * 1024 * 1024)
 260     {
 261         pop_failure(error_str);
 262         document.getElementById('send').style.display = 'none';
 263     }
 264     else
 265     {
 266         // add class to restyle upload form in next step
 267         document.getElementById('upload').setAttribute('class', 'file-selected');
 268         // display options
 269         document.getElementById('options').style.display = 'block';
 270         document.getElementById('send').style.display = 'block';
 271         document.getElementById('error_pop').style.display = 'none';
 272         document.getElementById('send').focus();
 273     }
 274 }
 275
 276 function pop_failure (e)
 277 {
 278     var text = "An error occured";
 279     if (typeof e !== 'undefined')
 280         text = e;
 281     text = "<p>" + text + "</p>";
 282     document.getElementById('error_pop').innerHTML = e;
 283
 284     document.getElementById('uploading').style.display = 'none';
 285     document.getElementById('error_pop').style.display = '';
 286     document.getElementById('upload').style.display = '';
 287     document.getElementById('send').style.display = '';
 288 }
 289
 290 function add_time_string_to_date(d, time)
 291 {
 292     if(typeof(d) != 'object' || !(d instanceof Date))
 293     {
 294         return false;
 295     }
 296
 297     if (time == 'minute')
 298     {
 299         d.setSeconds (d.getSeconds() + 60);
 300         return true;
 301     }
 302     if (time == 'hour')
 303     {
 304         d.setSeconds (d.getSeconds() + 3600);
 305         return true;
 306     }
 307     if (time == 'day')
 308     {
 309         d.setSeconds (d.getSeconds() + 86400);
 310         return true;
 311     }
 312     if (time == 'week')
 313     {
 314         d.setSeconds (d.getSeconds() + 604800);
 315         return true;
 316     }
 317     if (time == 'month')
 318     {
 319         d.setSeconds (d.getSeconds() + 2419200);
 320         return true;
 321     }
 322     if (time == 'quarter')
 323     {
 324         d.setSeconds (d.getSeconds() + 7257600);
 325         return true;
 326     }
 327     if (time == 'year')
 328     {
 329         d.setSeconds (d.getSeconds() + 29030400);
 330         return true;
 331     }
 332     return false;
 333 }
 334
 335 function classic_upload (file, time, password, one_time, upload_password)
 336 {
 337     // Delay time estimation init as we can't have file size
 338     upload_time_estimation_init(0);
 339
 340     var req = new XMLHttpRequest ();
 341     req.upload.addEventListener ("progress", upload_progress, false);
 342     req.addEventListener ("error", pop_failure, false);
 343     req.addEventListener ("abort", pop_failure, false);
 344     req.onreadystatechange = function ()
 345     {
 346         if (req.readyState == 4 && req.status == 200)
 347         {
 348             var res = req.responseText;
 349
 350             // if response starts with "Error" then show a failure
 351             if (/^Error/.test(res))
 352             {
 353                 pop_failure (res);
 354                 return;
 355             }
 356
 357             res = res.split ("\n");
 358             var expiryDate = '';
 359             if (time != 'none')
 360             {
 361                 // convert time (local time + selected expiry date)
 362                 var localDatetime = new Date();
 363                 if(!add_time_string_to_date(localDatetime, time))
 364                 {
 365                     pop_failure ('Error: Date can not be parsed');
 366                     return;
 367                 }
 368                 expiryDate = localDatetime;
 369             }
 370
 371             show_link (res[0], res[1], res[2], expiryDate);
 372         }
 373     }
 374     req.open ("POST", 'script.php' , true);
 375
 376     var form = new FormData();
 377     form.append ("file", file);
 378     if (time)
 379         form.append ("time", time);
 380     if (password)
 381         form.append ("key", password);
 382     if (one_time)
 383         form.append ("one_time_download", '1');
 384     if (upload_password.length > 0)
 385         form.append ("upload_password", upload_password);
 386
 387     req.send (form);
 388 }
 389
 390 function check_html5_file_api ()
 391 {
 392     return window.File && window.FileReader && window.FileList && window.Blob;
 393 }
 394
 395 var async_global_transfered = 0;
 396 var async_global_file;
 397 var async_global_ref = '';
 398 var async_global_max_size = 0;
 399 var async_global_time;
 400 var async_global_transfering = 0;
 401
 402 function async_upload_start (max_size, file, time, password, one_time, upload_password)
 403 {
 404     async_global_transfered = 0;
 405     async_global_file = file;
 406     async_global_max_size = max_size;
 407     async_global_time = time;
 408
 409     var req = new XMLHttpRequest ();
 410     req.addEventListener ("error", pop_failure, false);
 411     req.addEventListener ("abort", pop_failure, false);
 412     req.onreadystatechange = function ()
 413     {
 414         if (req.readyState == 4 && req.status == 200)
 415         {
 416             var res = req.responseText;
 417
 418             if (/^Error/.test(res))
 419             {
 420                 pop_failure (res);
 421                 return;
 422             }
 423
 424             res = res.split ("\n");
 425             async_global_ref = res[0];
 426             var code = res[1];
 427             async_upload_push (code);
 428         }
 429     }
 430     req.open ("POST", 'script.php?init_async' , true);
 431
 432     var form = new FormData();
 433     form.append ("filename", async_global_file.name);
 434     form.append ("type", async_global_file.type);
 435     if (time)
 436         form.append ("time", time);
 437     if (password)
 438         form.append ("key", password);
 439     if (one_time)
 440         form.append ("one_time_download", '1');
 441     if (upload_password.length > 0)
 442         form.append ("upload_password", upload_password);
 443
 444     // Start time estimation
 445     upload_time_estimation_init(async_global_file.size);
 446
 447     req.send (form);
 448 }
 449
 450 function async_upload_progress (e)
 451 {
 452     if (e == undefined || e == null || !e.lengthComputable && async_global_file.size != 0)
 453         return;
 454
 455     // Compute percentage
 456     var p = Math.round ((e.loaded + async_global_transfered) * 100 / (async_global_file.size));
 457     var p_str = ' ';
 458     if (p != 100)
 459         p_str = p.toString() + '%';
 460     // Update estimation speed
 461     upload_time_estimation_add(e.loaded + async_global_transfered);
 462     // Get speed string
 463     var speed_str = upload_time_estimation_speed_string();
 464     speed_str = upload_speed_refresh_limiter(speed_str);
 465     // Get time string
 466     var time_str = chrono_update(upload_time_estimation_time());
 467
 468     show_upload_progression (p_str, speed_str, time_str);
 469 }
 470
 471 function async_upload_push (code)
 472 {
 473     if (async_global_transfered == async_global_file.size)
 474     {
 475         hide_upload_progression ();
 476         async_upload_end (code);
 477         return;
 478     }
 479     var req = new XMLHttpRequest ();
 480     req.upload.addEventListener ("progress", async_upload_progress, false);
 481     req.addEventListener ("error", pop_failure, false);
 482     req.addEventListener ("abort", pop_failure, false);
 483     req.onreadystatechange = function ()
 484     {
 485         if (req.readyState == 4 && req.status == 200)
 486         {
 487             var res = req.responseText;
 488
 489             if (/^Error/.test(res))
 490             {
 491                 pop_failure (res);
 492                 return;
 493             }
 494
 495             res = res.split ("\n");
 496             var code = res[0]
 497             async_global_transfered = async_global_transfering;
 498             async_upload_push (code);
 499         }
 500     }
 501     req.open ("POST", 'script.php?push_async' , true);
 502
 503     var chunk_size = parseInt (async_global_max_size * 0.50);
 504     var start = async_global_transfered;
 505     var end = start + chunk_size;
 506     if (end >= async_global_file.size)
 507         end = async_global_file.size;
 508     var blob = async_global_file.slice (start, end);
 509     async_global_transfering = end;
 510
 511     var form = new FormData();
 512     form.append ("ref", async_global_ref);
 513     form.append ("data", blob);
 514     form.append ("code", code);
 515     req.send (form);
 516 }
 517
 518 function async_upload_end (code)
 519 {
 520     var req = new XMLHttpRequest ();
 521     req.addEventListener ("error", pop_failure, false);
 522     req.addEventListener ("abort", pop_failure, false);
 523     req.onreadystatechange = function ()
 524     {
 525         if (req.readyState == 4 && req.status == 200)
 526         {
 527             var res = req.responseText;
 528
 529             if (/^Error/.test(res))
 530             {
 531                 pop_failure (res);
 532                 return;
 533             }
 534
 535             res = res.split ("\n");
 536             var expiryDate = '';
 537             if (async_global_time != 'none')
 538             {
 539               // convert time (local time + selected expiry date)
 540               var localDatetime = new Date();
 541               if(!add_time_string_to_date(localDatetime, async_global_time)) {
 542                 pop_failure ('Error: Date can not be parsed');
 543                 return;
 544               }
 545               expiryDate = localDatetime;
 546             }
 547
 548             show_link (res[0], res[1], res[2], expiryDate);
 549         }
 550     }
 551     req.open ("POST", 'script.php?end_async' , true);
 552
 553     var form = new FormData();
 554     form.append ("ref", async_global_ref);
 555     form.append ("code", code);
 556     req.send (form);
 557 }
 558
 559 function upload (max_size)
 560 {
 561     if (check_html5_file_api ()
 562         && document.getElementById('file_select').files[0].size >= max_size)
 563     {
 564         async_upload_start (
 565             max_size,
 566             document.getElementById('file_select').files[0],
 567             document.getElementById('select_time').value,
 568             document.getElementById('input_key').value,
 569             document.getElementById('one_time_download').checked,
 570             document.getElementById('upload_password').value
 571             );
 572     }
 573     else
 574     {
 575         classic_upload (
 576             document.getElementById('file_select').files[0],
 577             document.getElementById('select_time').value,
 578             document.getElementById('input_key').value,
 579             document.getElementById('one_time_download').checked,
 580             document.getElementById('upload_password').value
 581             );
 582     }
 583 }
 584
 585 var upload_time_estimation_total_size = 42;
 586 var upload_time_estimation_transfered_size = 42;
 587 var upload_time_estimation_transfered_date = 42;
 588 var upload_time_estimation_moving_average_speed = 42;
 589
 590 function upload_time_estimation_init(total_size)
 591 {
 592     upload_time_estimation_total_size = total_size;
 593     upload_time_estimation_transfered_size = 0;
 594     upload_time_estimation_moving_average_speed = 0;
 595     var d = new Date();
 596     upload_time_estimation_transfered_date = d.getTime();
 597 }
 598
 599 function upload_time_estimation_add(total_transfered_size)
 600 {
 601     // Let's compute the current speed
 602     var d = new Date();
 603     var speed = upload_time_estimation_moving_average_speed;
 604     if (d.getTime() - upload_time_estimation_transfered_date != 0)
 605         speed = (total_transfered_size - upload_time_estimation_transfered_size)
 606                 / (d.getTime() - upload_time_estimation_transfered_date);
 607     // Let's compute moving average speed on 30 values
 608     var m = (upload_time_estimation_moving_average_speed * 29 + speed) / 30;
 609     // Update global values
 610     upload_time_estimation_transfered_size = total_transfered_size;
 611     upload_time_estimation_transfered_date = d.getTime();
 612     upload_time_estimation_moving_average_speed = m;
 613 }
 614
 615 function upload_time_estimation_speed_string()
 616 {
 617     // speed ms -> s
 618     var s = upload_time_estimation_moving_average_speed * 1000;
 619     var res = 0;
 620     var scale = '';
 621     if (s <= 1000)
 622     {
 623         res = s.toString();
 624         scale = "Bit/s";
 625     }
 626     else if (s < 1000000)
 627     {
 628         res = Math.floor(s/100) / 10;
 629         scale = "KBit/s";
 630     }
 631     else
 632     {
 633         res = Math.floor(s/100000) / 10;
 634         scale = "Mbit/s";
 635     }
 636     if (res == 0)
 637         return '';
 638     return res.toString() + ' ' + scale;
 639 }
 640
 641 function milliseconds_to_time_string (milliseconds)
 642 {
 643     function numberEnding (number) {
 644       var currentLanguage = '<?php echo $cfg['lang']; ?>';
 645
 646       if(currentLanguage == 'de') {
 647         return (number > 1) ? 'n' : '';
 648       }
 649       else {
 650         return (number > 1) ? 's' : '';
 651       }
 652     }
 653
 654     var temp = Math.floor(milliseconds / 1000);
 655     var years = Math.floor(temp / 31536000);
 656     if (years) {
 657         return years + ' ' + translate ('YEAR') + numberEnding(years);
 658     }
 659     var days = Math.floor((temp %= 31536000) / 86400);
 660     if (days) {
 661         return days + ' ' + translate ('DAY') + numberEnding(days);
 662     }
 663     var hours = Math.floor((temp %= 86400) / 3600);
 664     if (hours) {
 665         return hours + ' ' + translate ('HOUR') + numberEnding(hours);
 666     }
 667     var minutes = Math.floor((temp %= 3600) / 60);
 668     if (minutes) {
 669         return minutes + ' ' + translate ('MINUTE') + numberEnding(minutes);
 670     }
 671     var seconds = temp % 60;
 672     if (seconds) {
 673         return seconds + ' ' + translate ('SECOND') + numberEnding(seconds);
 674     }
 675     return translate ('LESS_1_SEC');
 676 }
 677
 678 function upload_time_estimation_time()
 679 {
 680     // Estimate remaining time
 681     if (upload_time_estimation_moving_average_speed == 0)
 682         return 0;
 683     return (upload_time_estimation_total_size - upload_time_estimation_transfered_size)
 684             / upload_time_estimation_moving_average_speed;
 685 }
 686
 687 var chrono_last_update = 0;
 688 var chrono_time_ms = 0;
 689 var chrono_time_ms_last_update = 0;
 690 function chrono_update(time_ms)
 691 {
 692     var d = new Date();
 693     var chrono = 0;
 694     // Don't update too often
 695     if (d.getTime() - chrono_last_update < 3000 &&
 696         chrono_time_ms_last_update > 0)
 697         chrono = chrono_time_ms;
 698     else
 699     {
 700         chrono_last_update = d.getTime();
 701         chrono_time_ms = time_ms;
 702         chrono = time_ms;
 703         chrono_time_ms_last_update = d.getTime();
 704     }
 705
 706     // Adjust chrono for smooth estimation
 707     chrono = chrono - (d.getTime() - chrono_time_ms_last_update);
 708
 709     // Let's update chronometer
 710     var time_str = '';
 711     if (chrono > 0)
 712         time_str = milliseconds_to_time_string (chrono);
 713     return time_str;
 714 }
 715
 716 var upload_speed_refresh_limiter_last_update = 0;
 717 var upload_speed_refresh_limiter_last_value = '';
 718 function upload_speed_refresh_limiter(speed_str)
 719 {
 720     var d = new Date();
 721     if (d.getTime() - upload_speed_refresh_limiter_last_update > 1500)
 722     {
 723         upload_speed_refresh_limiter_last_value = speed_str;
 724         upload_speed_refresh_limiter_last_update = d.getTime();
 725     }
 726     return upload_speed_refresh_limiter_last_value;
 727 }
 728
 729 // document.ready()
 730 document.addEventListener('DOMContentLoaded', function(event) {
 731     // Search for all datetime fields and convert the time to local timezone
 732     convertAllDatetimeFields();
 733 });
 734
 735 // Add copy event listeners
 736 function copyLinkToClipboard(link_id) {
 737     var focus = document.activeElement;
 738     var e = document.getElementById(link_id);
 739
 740     var tmp = document.createElement("textarea");
 741     document.body.appendChild(tmp);
 742     tmp.textContent = e.href;
 743     tmp.focus();
 744     tmp.setSelectionRange(0, tmp.value.length);
 745     document.execCommand("copy");
 746     document.body.removeChild(tmp);
 747
 748     focus.focus();
 749 }
 750
 751 function addCopyListener(button_id, link_id) {
 752     document.getElementById(button_id)
 753             .addEventListener("click", function() {
 754                 copyLinkToClipboard(link_id);});
 755 }