前端利用zip.js实现ZIP压缩包在线解压与查看

<!DOCTYPE html>
<html>
<head lang="en">
 <meta charset="UTF-8">
 <title></title>
 <script src="http://gildas-lormeau.github.io/zip.js/demos/zip.js"></script>
 <script src="http://gildas-lormeau.github.io/zip.js/demos/mime-types.js"></script>
 <script src="http://apps.bdimg.com/libs/jquery/1.9.0/jquery.js"></script>
 <script src="http://files.cnblogs.com/files/diligenceday/UnZipArchive.js"></script>
</head>
<body>
<h2>
 demo
</h2>
<div>
 <input type="file" id="file">
</div>
<ul id="dir">

</ul>
<script>
 $("#file").change(function (e) {
  var file = this.files[0];
  window.un = new UnZipArchive( file );
  un.getData( function() {
   //获取所以的文件和文件夹列表;
   var arr = un.getEntries();
   //拼接字符串
   var str = "";
   for(var i=0; i<arr.length; i++ ) {
    //点击li的话直接下载文件;
    str += "<li onclick=download('"+arr[i]+"')>"+arr[i]+"</li>"
   };
   $("#dir").html( str );
  });
 });
 var download = function ( filename ) {
  un.download( filename );
 };
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head lang="en">
 <meta charset="UTF-8">
 <title></title>
 <script src="http://gildas-lormeau.github.io/zip.js/demos/zip.js"></script>
 <script src="http://gildas-lormeau.github.io/zip.js/demos/mime-types.js"></script>
 <script src="http://apps.bdimg.com/libs/jquery/1.9.0/jquery.js"></script>
 <style>
  code{
   display: block;
   padding: 10px;
   background: #eee;
  }
 </style>
</head>
<body>
<div>
 <h1>
  兼容性
 </h1>
 <div>
  <p>
   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;
  </p>
  <p>
   如果要在IE9和safari中运行需要两个设置：
  </p>
  <code>
   1：zip.useWebWorkers == false
  </code>
  <code>
   2：并引用这个JS:https://bitbucket.org/lindenlab/llsd/raw/7d2646cd3f9b/js/typedarray.js
  </code>
 </div>

 <h2>
  demo
 </h2>
 <div>
  <input type="file" id="file">
 </div>
 <ul id="dir">

 </ul>
 <script>
  $("#file").change(function (e) {
   var file = this.files[0];
   window.un = new UnZipArchive( file );
   un.getData( function() {
    var arr = un.getEntries();
    var str = "";
    for(var i=0; i<arr.length; i++ ) {
     str += "<li onclick=download('"+arr[i]+"')>"+arr[i]+"</li>"
    };
    $("#dir").html( str );
   });
  });
  var download = function ( filename ) {
   un.download( filename );
  };
 </script>
</div>
<script>
 zip.workerScriptsPath = "http://gildas-lormeau.github.io/zip.js/demos/";
 /**
  * @desc 解压缩文件的类;
  * @return UnZipArchive 的实例;
  * */
 var UnZipArchive = function( blob ) {
  if( !blob ) {
   alert("参数不正确, 需要一个Blob类型的参数");
   return ;
  };
  if( !(blob instanceof Blob) ) {
   alert("参数不是Blob类型");
   return ;
  };

  function noop() {};
  this.entries = {};
  this.zipReader = {};
  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.createReader( new zip.BlobReader( blob ), function(zipReader) {
   _this.zipReader = zipReader;
   zipReader.getEntries(function(entries) {
    _this.entries = entries;
    //继续执行队列;
    def.resolve();
   });
  }, this.error.bind(_this) );
 };

 /**
  * @desc 把blob文件转化为dataUrl;
  * */
 UnZipArchive.readBlobAsDataURL = function (blob, callback) {
  var f = new FileReader();
  f.onload = function(e) {callback( e.target.result );};
  f.readAsDataURL(blob);
 };

 $.extend( UnZipArchive.prototype, {
  /**
   * @desc 获取压缩文件的所有入口;
   * @return ArrayList;
   * */
  "getEntries" : function() {
   var result = [];
   for(var i= 0, len = this.entries.length ; i<len; i++ ) {
    result.push( this.entries[i].filename );
   }
   return result;
  },

  /**
   * @desc 获取文件Entry;
   * @return Entry
   * */
  "getEntry" : function ( filename ) {
   var entrie;
   for(var i= 0, len = this.entries.length ; i<len; i++ ) {
    if( this.entries[i].filename === filename) {
     return this.entries[i];
    };
   }
  },

  /**
   * @desc 下载文件
   * @param filename;
   * @return void;
   * */
  "download" : function ( filename , cb , runoninit) {
   var _this = this;
   this.defer = this.defer.then(function() {
    var def = $.Deferred();
    if(!filename) return ;
    if(runoninit) {
     return runoninit();
    };
    var entry = _this.getEntry( filename );
    if(!entry)return;
    entry.getData(new zip.BlobWriter(zip.getMimeType(entry.filename)), function(data) {
     if( !cb ) {
      UnZipArchive.readBlobAsDataURL(data, function( dataUrl ) {
       var downloadButton = document.createElement("a"),
         URL = window.webkitURL || window.mozURL || window.URL;
       downloadButton.href = dataUrl;
       downloadButton.download = filename;
       downloadButton.click();
       def.resolve( dataUrl );
       _this.onend();
      });
     }else{
      cb( data );
      def.resolve( data );
     }
    });
    return def;
   });
  },

  /**
   * @desc 获取对应的blob数据;
   * @param filename 文件名;
   * @param callback回调, 参数为 blob;
   * @desc 或者可以直接传一个函数作为zip解压缩完毕的回调;
   * */
  "getData" : function ( filename, fn ) {
   if( typeof filename === "string") {
    this.download(filename, function( blob ) {
     fn&&fn( blob );
    });
   }else if( typeof filename === "function") {
    this.download("test", null, function( blob ) {
     filename();
    });
   };
  },

  "error" : function() {
   this.onerror( this );
   throw new Error("压缩文件解压失败");
  }
 });

</script>
</body>
</html>