Binary library

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

Version vom 20.12.2014. Aktuellste Version

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/7079/28932/Binary%20library.js

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// ==UserScript==
// @name		Binary library
// @namespace	[email protected]
// @description	Lets you download files as a binary stream, and upload them as multipart/form-data. Userscript library.
// @include		*
// @grant		GM_xmlhttpRequest
// @license		cc-by-sa
// ==/UserScript==

BinaryRes = {};

BinaryRes.get = function (object)
 {
	var request = 
	{
		method: 'GET',
		url: object.url,
		overrideMimeType: 'text/plain; charset=x-user-defined',
		binary: true,
		onload: object.callback,
	};

	if (object.override) 
	{
		for (var attr in object.override) request[attr] = object.override[attr]
	}

	GM_xmlhttpRequest(request);
}

BinaryRes._clean = function (bytes) 
{
	var binarray = [];
	[].forEach.call(bytes, function (byte) 
	{
		binarray.push(String.fromCharCode(byte.charCodeAt(0) & 0xff));
	});
	return binarray.join('');
}

BinaryRes._bound = function()
 {
	var z = 98729145294692;
	var a = 12400722650394;
	return Array(28).join('-') + Math.floor(Math.random() * (z - a)) + a;
}

BinaryRes._typeof = function(value) {
	// from crockford
	var s = typeof value;
	if (s === 'object') {
		if (value) {
			if (typeof value.length === 'number' &&
				!(value.propertyIsEnumerable('length')) &&
				typeof value.splice === 'function') {
				s = 'array';
			}
		} else {
			s = 'null';
		}
	}
	return s;
}

BinaryRes.post = function (obj) 
{
	// url, callback, data
	var build = [];
	var boundary = BinaryRes._bound();
	for (var name in obj.data)
	 {
		if (obj.data.hasOwnProperty(name))
		{
			build.push('--' + boundary);
			var disp = 'Content-Disposition: form-data; name="' + name + '"';
			if (BinaryRes._typeof(obj.data[name]) == 'object')
			 {
				var value = BinaryRes._clean(obj.data[name].value);
				if (obj.data[name].filename)
					disp += '; filename="' + obj.data[name].filename + '"';
				build.push(disp);
				build.push('Content-type: ' + obj.data[name].type);
			} else 
			{
				var value = obj.data[name];
				build.push(disp);
			}
			build.push('');
			build.push(value);
		}
	}
	build.push('--' + boundary + '--');
	var data = build.join('\r\n');
	var request = 
	{
		method: 'POST',
		url: obj.url,
		binary: true,
		headers: 
		{
			"Content-Type": 'multipart/form-data; boundary=' + boundary,
			"Content-Length": data.length
		},
		data: data,
		onload: obj.callback
	};
	if (obj.override) 
	{
		for (var attr in obj.override) request[attr] = obj.override[attr]
	}
	GM_xmlhttpRequest(request);
}

BinaryRes.guessType = function(stream) 
{
	if (!stream) return;
	var dict = 
	[
		[0, 3, '\xFF\xD8\xFF', 'image/jpeg'],
		[1, 4, 'PNG', 'image/png'],
		[0, 3, 'GIF', 'image/gif'],
		[0, 4, '%PDF', 'application/pdf'],
	]
	stream = BinaryRes._clean(stream);
	for (var ii = 0; ii < dict.length; ii++) 
	{
		if (stream.slice(dict[ii][0], dict[ii][1]) === dict[ii][2])
			return dict[ii][3];
	}
}