node壓縮流傳輸

const http = require("http");
const fs = require("fs");
const zlib = require("zlip")

let server = http.createServer((req,res)=>{
    let rs = fs.createReadStream(`www${req.url}`)
    let gz = zlib.createGZip();
    res.setHeader("content-encoding","gzip")
    rs.pipe(gz).pipe(res)
})