JavaScript实现的zip压缩和解压缩工具包Zip.js使用详解_javascript技巧

 
 
 
 
 
 


 
 

 兼容性
 
 
 

 zip.js可以在所有的chrome浏览器和firefox浏览器中运行， 可以在safari6和IE10，以及IE10以上运行;
 
 

 如果要在IE9和safari中运行需要两个设置：
 
 
 1：zip.useWebWorkers == false
 
 
 2：并引用这个JS:https://bitbucket.org/lindenlab/llsd/raw/7d2646cd3f9b/js/typedarray.js
 
 
 

 zip.workerScriptsPath = "http://gildas-lormeau.github.io/zip.js/demos/";
 /**
 * @desc 压缩文件;
 * @event onprogress, onend, onerror;
 * */
 var ZipArchive = function() {
 function noop() {};
 this.name = "未命名文件";
 this.zippedBlob = {};
 var _this = this;
 this.length = 0;
 this.onend = noop;
 this.onerror = noop;
 this.onprogress = noop;
 //创建一个延迟对象;
 var def = this.defer = new $.Deferred();
 zip.createWriter( new zip.BlobWriter("application/zip"), function(zipWriter) {
 _this.zipWriter = zipWriter;
 //继续执行队列;
 def.resolve();
 }, this.error );
 };

 ZipArchive.blob = function (filename, content) {
 return new Blob([ content ], {
 type : zip.getMimeType(filename)
 });
 };

 $.extend( ZipArchive.prototype, {
 /**
 * @desc 添加文件
 * @param String filename为文件的名字;
 * @param String content;
 * @param Object options 传参
 * 例如：{ level : 0} 压缩的等级，0 到 9；
 * 例如：{ comment : "提示文字" }
 * 例如：{ lastModDate : "最后编辑时间" }
 * */
 "addFile" : function ( filename , content, options) {
 var _this = this;
 blob = ZipArchive.blob(filename, content);
 //为了产生链式的效果， 必须把deferrer赋值给新的defer
 this.defer = this.defer.then(function() {
 var def = $.Deferred();

 _this.zipWriter.add(filename, new zip.BlobReader(blob)
 ,function() { // reader
 console.log("addFile success!!");
 def.resolve();
 //zipWriter.close(callback);
 }, function (size, total) { //onend
 _this.onend(filename, blob, total);
 _this.length += total;
 }, function () { //onprogress
 _this.onprogress(filename, blob, total);
 },options || {
 //options
 });

 return def;
 });
 },

 /**
 * @desc 添加文件夹, 我发现这个文件无法创建;
 * @desc 创建文件夹功能不好用, 需要创建文件夹你通过 zipWriter.addFile("directory/filename.txt", blob())创建文件夹和对应文件;;
 * */
 "_addFolder" : function (foldername , options) {
 //创建文件夹功能目前不能用;
 //创建文件夹功能不好用, 直接通过 zipWriter.addFile("directory/filename.txt", blob())创建文件夹和文件
 return this;
 },

 "size" : function () {
 return this.length;
 },

 /**
 * @desc 获取blob文件
 * */
 "get" : function () {
 return this.zippedBlob;
 },

 /**
 * @desc 导出为zip文件
 * */
 "export" : function ( name ) {
 name = name || this.name;
 var _this = this;
 this.defer.then(function() {
 _this.zipWriter.close(function( zippedBlob ) {
 if( typeof name === "string" || typeof name === "number") {
 var downloadButton = document.createElement("a"),
 URL = window.webkitURL || window.mozURL || window.URL;
 downloadButton.href = URL.createObjectURL( zippedBlob );
 downloadButton.download = name + ".zip";
 downloadButton.click();
 }else{
 name( zippedBlob );
 };
 });
 });
 },

 "error" : function() {
 this.onerror( this );
 throw new Error("压缩文件创建失败");
 }
 });