Node.js zlib.gunzip()方法
原文:https://www.geeksforgeeks.org/node-js-zlib-gunzip-method/
zlib.gunzip()方法是 zlib 模块的内置应用程序编程接口，用于解压缩一大块数据。
语法:
zlib.gunzip( buffer, options, callback )
参数:该方法接受三个参数，如上所述，如下所述:
- Buffer: it can be buffer, type, data view, array buffer and string type. *option: is an optional parameter for saving zlib options. Callback: It holds the callback function.*
*返回值:*解压后返回数据块。
以下示例说明了 Node.js 中 zlib.gunzip()方法的使用:
*例 1:*
**```js // Node.js program to demonstrate the // gunzip() method
// Including zlib module const zlib = require("zlib");
// Declaring input and assigning // it a value string var input = "Geek";
// Calling gzip method zlib.gzip(input, (err, buffer) => {
// Calling gunzip method zlib.gunzip(buffer, (err, buffer) => {
console.log(buffer.toString('utf8'));
}); });
console.log("Data Decompressed..."); ```**
*输出:*
Data Decompressed...
Geek
*例 2:*
**```js // Node.js program to demonstrate the // gunzip() method
// Including zlib module const zlib = require("zlib");
// Declaring input and assigning // it a value string var input = "Geek";
// Calling gzip method zlib.gzip(input, (err, buffer) => {
// Calling gunzip method zlib.gunzip(buffer, (err, buffer) => {
console.log(buffer.toString('hex'));
}); });
console.log("Data Decompressed..."); ```**
*输出:*
Data Decompressed...
4765656b
*参考:*https://nodejs . org/API/zlib . html # zlib _ gunzip _ buffer _ options _ callback
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