基于pako.js实现gzip的压缩和解压功能示例

2019-11-19 16:21:17

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本文实例讲述了基于pako.js实现gzip的压缩和解压功能。分享给大家供大家参考，具体如下：

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>pako.js实现gzip的压缩和解压</title></head><body><script type="text/javascript" src="pako.js"></script><script >var b64Data   = 'H4sIAAAAAAAAAJ3UMQ7CMAwF0KugP2ewEzdpcxXUAbWAOiHUMqCqdyeVQAobfGXIYL8hP5ZXnEdkeNEk6vUgXTbLonC4zMjHFY/5Wm511ekdTsOCLKVp2rlIKOA2jTuBot/cr7BhobEwsbAloY8kDGyqoQ5H/oHsdwQ21cCmaspCz0L2jcYOgLHhNGw4TT1yVmBpuS9PZHWY35siqnxvimEvpE9FY4peQhfbhO0FDnuFqWAEAAA=';var ticketData = '{"ed":"20170121 09:44:01","fs":[{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"003","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"005","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"004","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"007","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"008","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"026","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"033","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"034","oids":["0"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"035","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"037","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"038","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"041","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"042","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"047","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"046","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"048","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"051","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"053","oids":["4"]}],"qty":1,"sd":"20161021 09:44:01","cd":"72016102116762039687"}';// Output to consolevar s = unzip(b64Data);console.log("unzipped:");console.log(s);var data = zip(ticketData);console.log("zipped:");console.log(data);function unzip(b64Data){  var strData   = atob(b64Data);  // Convert binary string to character-number array  var charData  = strData.split('').map(function(x){return x.charCodeAt(0);});  // Turn number array into byte-array  var binData   = new Uint8Array(charData);  // // unzip  var data    = pako.inflate(binData);  // Convert gunzipped byteArray back to ascii string:  strData   = String.fromCharCode.apply(null, new Uint16Array(data));  return strData;}function zip(str){  var binaryString = pako.gzip(str, { to: 'string' });  return btoa(binaryString);}</script></body></html>

运行效果图如下：