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file saver

library for save various data into file

Verzia zo dňa 18.03.2018. Pozri najnovšiu verziu.

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://update.greasyfork.org/scripts/39714/259782/file%20saver.js 

// ==UserScript==
// @name        file saver
// @namespace   https://greasyfork.org/users/174399
// @description library for save various data into file
// @version     0.1.0
// ==/UserScript==

function saveFile(name, source)
{
	var a = document.createElement('a');
	a.download = name;
	a.href = source;
	document.body.appendChild(a);
	a.click();
	a.parentNode.removeChild(a);
}
function createFile(data, type){return createResource(new Blob([data], {type: type}));}
function createResource(blob)
{
	var wurl = window.URL || window.webkitURL,
		resource = wurl.createObjectURL(blob);
	setTimeout(function(){wurl.revokeObjectURL(resource);}, 1e4);
	return resource;
}
function createBlob(base64, type, len)
{
	len = len || 1024;
	var bytes = [];
	for(var offset = 0, charString = atob(base64), chunk, chunkBytes; offset < charString.length; offset += len)
	{
		chunk = charString.slice(offset, offset + len);
		chunkBytes = new Array(chunk.length);
		for(var i = 0; i < chunk.length; ++i)
			chunkBytes[i] = chunk.charCodeAt(i);
		bytes.push(new Uint8Array(chunkBytes));
	}
	return new Blob(bytes, {type: type});
}
function saveData(name, data, type){saveFile(name, createFile(data, type));}
function saveBlob(name, blob){saveFile(name, createResource(blob));}
function saveBase64(name, base64, type){saveBlob(name, createBlob(base64, type));}