服务器代码如下const express = require("express");
const app = express();
const path = require("path");
const fs = require("fs");
const zlib = require("zlib");
app.get("/", (req, res) => {
const filePath = path.resolve(__dirname, "./index.html");
const rs = fs.createReadStream(filePath);
//获取请求中的Accept-Encoding可以接受的类型，根据可以接受的类型来完成压缩选择
console.log(req.headers["accept-encoding"]);
const acceptEncoding = req.headers["accept-encoding"];
//可以使用includes判断字符串中是否含有某个值
if (acceptEncoding.includes("gzip")) {
const zlibFile = rs.pipe(zlib.createGzip())
res.set("Content-Encoding", "gzip")
return zlibFile.pipe(res);
}
if (acceptEncoding.includes("deflate")) {
const zlibFile = rs.pipe(zlib.createDeflate())
res.set("Content-Encoding", "deflate")
return zlibFile.pipe(res);
}
if (acceptEncoding.includes("br")) {
const zlibFile = rs.pipe(zlib.createBrotliCompress())
res.set("Content-Encoding", "br")
return zlibFile.pipe(res);
}
//如果上边的条件都不符合，则不压缩 直接响应
rs.pipe(res);
//使用gZip压缩:创建一个新的gzip对象，并把文件写入这个对象中
/* const zlibFile = rs.pipe(zlib.createGzip())
res.set("Content-Encoding", "gzip") */
/* const zlibFile = rs.pipe(zlib.createBrotliCompress())
res.set("Content-Encoding", "br") */
/* const zlibFile = rs.pipe(zlib.createDeflate())
res.set("Content-Encoding", "deflate") */
// zlibFile.pipe(res);
})
app.listen("3000", (err) => {
if (err) {
console.log(err);
return;
}
console.log("http://127.0.0.1:3000");
})
