55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
import pako from "pako";
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import { encode, decode } from 'js-base64';
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// 压缩
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export const zip = (data, needEncode = true) => {
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if (!data) return data
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// 判断数据是否需要转为JSON
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const dataJson: string = typeof data !== 'string' ? JSON.stringify(data) : data
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// 使用Base64.encode处理字符编码，兼容中文
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const str = needEncode ? encode(dataJson) : dataJson;
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let binaryString = pako.gzip(str) as number[];
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let arr = Array.from(binaryString);
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let s = "";
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arr.forEach((item: number) => {
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s += String.fromCharCode(item)
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})
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return btoa(s)
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}
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// 解压
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export const unzip = (b64Data, needDecode = true) => {
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let strData = atob(b64Data);
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let charData = strData.split('').map(function (x) {
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return x.charCodeAt(0);
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});
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let binData = new Uint8Array(charData);
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let data = pako.ungzip(binData);
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// ↓切片处理数据，防止内存溢出报错↓
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let str = '';
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const chunk = 8 * 1024
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let i;
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for (i = 0; i < data.length / chunk; i++) {
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str += String.fromCharCode.apply(null, data.slice(i * chunk, (i + 1) * chunk));
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}
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str += String.fromCharCode.apply(null, data.slice(i * chunk));
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// ↑切片处理数据，防止内存溢出报错↑
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const unzipStr = needDecode ? decode(str) : str;
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let result;
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// 对象或数组进行JSON转换
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try {
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result = JSON.parse(unzipStr)
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} catch (error) {
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if (/Unexpected token o in JSON at position 0/.test(error as string)) {
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// 如果没有转换成功，代表值为基本数据，直接赋值
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result = unzipStr
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}
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}
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return result;
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}
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