一、准备工具
1.pako脚本库
2.前端Uint8Array与Base64互转函数（代码如下）
function uint8arrayToBase64(u8Arr) {
let CHUNK_SIZE = 0x8000; //arbitrary number
let index = 0;
let length = u8Arr.length;
let result = ”;
let slice;
while (index < length) {
slice = u8Arr.subarray(index, Math.min(index + CHUNK_SIZE, length));
result += String.fromCharCode.apply(null, slice);
index += CHUNK_SIZE;
}
// web image base64图片格式: “data:image/png;base64,” + b64encoded;
// return “data:image/png;base64,” + btoa(result);
return btoa(result);
}
// base64字符串转为uint8array数组
function base64ToUint8Array(base64String) {
let padding = ‘=’.repeat((4 – base64String.length % 4) % 4);
let base64 = (base64String + padding)
.replace(/-/g, ‘+’)
.replace(/_/g, ‘/’);
let rawData = window.atob(base64);
let outputArray = new Uint8Array(rawData.length);
for (var i = 0; i < rawData.length; ++i) {
outputArray[i] = rawData.charCodeAt(i);
}
return outputArray;
}
二、具体用法案例
1.前端JS压缩+后端PHP解压
JS压缩
var rawData = {title:”this is pako.defalte test”,author:
“slongzhang@qq.com”, date: “2021-04-02”, content: “test test test test test
test test test test test test test test test test test test test test test
test test test test test test test test test test test test test test test
test test test test test test test test test test test test test test test
test test test test test test test test test test test test test test test
test test test test test test test test test test test test test test test
test test test test test test test test test test test test test test test
test test test test test test test test test test test test test test test
“}
var binaryString = pako.deflateRaw(JSON.stringify(rawData), { to: ‘string’ });
var compressedBase64 = uint8arrayToBase64(binaryString);
console.log(compressedBase64);// q1YqySzJSVWyUirJyCxWAKKCxOx8vZTUtMScklSFktTiEiUdpcTSkoz8IqCi4pz8vPSqjMS8dIfCQr3k/FygZEpiCUi/kYGRoa6Bia6BEVAsOT+vJDWvBGQs0ASFUWKUwEco1QIA
$base64String = ‘q1YqySzJSVWyUirJyCxWAKKCxOx8vZTUtMScklSFktTiEiUdpcTSkoz8IqCi4pz8vPSqjMS8dI
fCQr3k/FygZEpiCUi/kYGRoa6Bia6BEVAsOT+vJDWvBGQs0ASFUWKUwEco1QIA’;
print_r(gzinflate(base64_decode($base64String)));
2.后端PHP压缩+前端JS解压
$array = array(
“title” => “this is pako.defalte test”,
“author” => “slongzhang@qq.com”,
“date” => “2021-04-02”,
“content” => “test test test test test test test test test test
test test test test test test test test test test test test test test
test test test test test test test test test test test test test test
test test test test test test test test test test test test test test
test test test test test test test test test test test test test test
test test test test test test test test test test test test test test
test test test test test test test test test test test test test test
test test test test test test test test test test test test test test
test test”
);
function compress($str) { return base64_encode(gzdeflate($str, 9)); }
echo compress(json_encode($array,256));
// q1YqySzJSVWyUirJyCxWAKKCxOx8vZTUtMScklSFktTiEiUdpcTSkoz8IqCi4pz8vPSqjMS8d
//IfCQr3k/FygZEpiCUi/kYGRoa6Bia6BEVAsOT+vJDWvBGQs0ASFUWKUwEco1QIA
JS解压
var decompress = function(str){
return pako.inflateRaw(base64ToUint8Array(str), {to: ‘string’});
}
var rawData = decompress(‘q1YqySzJSVWyUirJyCxWAKKCxOx8vZTUtMScklSFktTiEiUdpcTSkoz8IqCi4pz
8vPSqjMS8dIfCQr3k/FygZEpiCUi/kYGRoa6Bia6BEVAsOT+vJDWvBGQs0ASFUWKUwEco1QIA’
);
console.log(rawData);
2.PHP要求(PHP 5.6, PHP 7, PHP 8)
原创文章，作者：guozi，如若转载，请注明出处：https://www.sudun.com/ask/90602.html
