Detailed explanation of the use of zip compression and decompression toolkit Zip.js implemented by JavaScript

Detailed explanation of the use of zip compression and decompression toolkit Zip.js implemented by JavaScript_javascript skills

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Release： 2016-05-16 15:25:59

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What is zip.js

github project address of zip.js: http://gildas-lormeau.github.io/zip.js/

Use zip.js to encapsulate a plug-in that can generate zip files on the web page. Create a compressed package containing folders and files directly on the web page. You can also customize the name and download it;

How to use:

　1: Quote zip.js

　2: Quote jQuery;

3: And reference the encapsulated ZipArchive.js, (because the api of zip.js is cumbersome to use, so I encapsulated and implemented this plug-in myself)

　4: Reference mime-types.js;

View DEMO, use method:

Run the following code

<!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/ZipArchive.js"></script>
</head>
<body>

<script>
  var z = new ZipArchive;
  z.addFile("a/a.txt", "aaaaaaacontent");
  z.addFile("aaaa.txt", "aaaaaaaccccc");
  z.export("nono");
</script>
</body>
</html>

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DEMO is at the back: download the file, the folder format is as follows:

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Detailed source code for creating compressed files and folders:
Run the following code

<!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>
  </div>
<script>
  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");
    }
  });

</script>
<script>
  var z = new ZipArchive;
  z.addFile("a/a.txt", "aaaaaaacontent");
  z.addFile("aaaa.txt", "aaaaaaaccccc");
  z.export("nono");
</script>
</body>
</html>

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