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Binary library

Lets you download files as a binary stream, and upload them as multipart/form-data. Userscript library.

当前为 2014-12-20 提交的版本，查看 最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.greatest.deepsurf.us/scripts/7079/28929/Binary%20library.js 

  1. // ==UserScript==
  2. // @name           Binary library
  3. // @namespace      shoecream@luelinks.net
  4. // @description    Lets you download files as a binary stream, and upload them as multipart/form-data. Userscript library.
  5. // @include        *
  6. // @grant          GM_xmlhttpRequest
  7. // @license        cc-by-sa
  8. // ==/UserScript==
  9.  
  10. BinaryRes = {};
  11.  
  12. BinaryRes.get = function (object) {
  13.   var request = {
  14.     method: 'GET',
  15.     url: object.url,
  16.     overrideMimeType: 'text/plain; charset=x-user-defined',
  17.     binary: true,
  18.     onload: object.callback,
  19.   };
  20.  
  21.   if (object.override) {
  22.     for (var attr in object.override) request[attr] = object.override[attr]
  23.   }
  24.  
  25.   GM_xmlhttpRequest(request);
  26. }
  27.  
  28. BinaryRes._clean = function (bytes) {
  29.   var binarray = [];
  30.   [].forEach.call(bytes, function (byte) {
  31.       binarray.push(String.fromCharCode(byte.charCodeAt(0) & 0xff));
  32.     });
  33.   return binarray.join('');
  34. }
  35.  
  36. BinaryRes._bound = function() {
  37.   var z = 98729145294692;  var a = 12400722650394;
  38.   return Array(28).join('-') + Math.floor(Math.random() * (z - a)) + a;
  39. }
  40.  
  41. BinaryRes._typeof = function(value) {
  42.   // from crockford
  43.   var s = typeof value;
  44.   if (s === 'object') {
  45.     if (value) {
  46.       if (typeof value.length === 'number' &&
  47.         !(value.propertyIsEnumerable('length')) &&
  48.         typeof value.splice === 'function') {
  49.         s = 'array';
  50.       }
  51.     } else {
  52.       s = 'null';
  53.     }
  54.   }
  55.   return s;  
  56. }
  57.  
  58. BinaryRes.post = function (obj) {
  59.   // url, callback, data
  60.   var build = [];
  61.   var boundary = BinaryRes._bound();  
  62.   for (var name in obj.data) {
  63.     if (obj.data.hasOwnProperty(name)) {
  64.       build.push('--' + boundary);
  65.       var disp = 'Content-Disposition: form-data; name="' + name + '"';
  66.       if (BinaryRes._typeof(obj.data[name]) == 'object') {
  67.         var value = BinaryRes._clean(obj.data[name].value);
  68.         if (obj.data[name].filename)
  69.           disp += '; filename="' + obj.data[name].filename + '"';
  70.         build.push(disp);
  71.         build.push('Content-type: ' + obj.data[name].type);
  72.       } else {
  73.         var value = obj.data[name];
  74.         build.push(disp);
  75.       }
  76.       build.push('');
  77.       build.push(value);
  78.     }
  79.   }
  80.   build.push('--' + boundary + '--');
  81.   var data = build.join('\r\n');
  82.   var request = {
  83.     method: 'POST',
  84.     url: obj.url,
  85.     binary: true,
  86.     headers: {
  87.       "Content-Type": 'multipart/form-data; boundary=' + boundary,
  88.       "Content-Length": data.length
  89.     },
  90.     data: data,
  91.     onload: obj.callback
  92.   };
  93.   if (obj.override) {
  94.     for (var attr in obj.override) request[attr] = obj.override[attr]
  95.   }
  96.   GM_xmlhttpRequest(request);
  97. }
  98.  
  99. BinaryRes.guessType = function(stream) {
  100.   if (!stream) return;
  101.   var dict = [
  102.     [0, 3, '\xFF\xD8\xFF', 'image/jpeg'],
  103.     [1, 4, 'PNG', 'image/png'],
  104.     [0, 3, 'GIF', 'image/gif'],
  105.     [0, 4, '%PDF', 'application/pdf'],
  106.   ]
  107.   stream = BinaryRes._clean(stream);
  108.   for (var ii = 0; ii < dict.length; ii++) {
  109.     if (stream.slice(dict[ii][0], dict[ii][1]) === dict[ii][2])
  110.       return dict[ii][3];
  111.   }
  112. }