Web Front-endJS TutorialDetailed explanation of the use of zip compression and decompression toolkit Zip.js implemented by JavaScript_javascript skills
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>
DEMO is at the back: download the file, the folder format is as follows:
Back to top
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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