前言

我是歌谣 微信公众号关注前端小歌谣一起学习前端知识 今天继续给大家讲解node中路由模块的讲解

启动服务器

const http=require("http")

http.createServer((req,res)=>{
    const myurl=new URL(req.url,"http://127.0.0.1")
    console.log(myurl.pathname)
}).listen(3000,()=>{
    console.log("server start")
})

运行结果

路由案例

const http = require("http")
const fs = require("fs")
http.createServer((req, res) => {
    const myurl = new URL(req.url, "http://127.0.0.1")
    // console.log(myurl.pathname)
    switch (myurl.pathname) {
        case "/login":
            res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/login.html", "utf8"))
            break
        case "/home":
            res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/home.html", "utf8"))
            break
        default:
            res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/404.html", "utf8"))
    }
    res.end()
}).listen(3000, () => {
    console.log("server start")
})

运行结果

抽离

route.js

const fs = require("fs")
function route(res,pathname){
    switch (pathname) {
        case "/login":
            res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/login.html", "utf8"))
            break
        case "/home":
            res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/home.html", "utf8"))
            break
        default:
            res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/404.html", "utf8"))
    }
}
module.exports = route

index.js

const http = require("http")
const route=require("./route.js")
http.createServer((req, res) => {
    const myurl = new URL(req.url, "http://127.0.0.1")
    // console.log(myurl.pathname)
   route(res,myurl.pathname)
    res.end()
}).listen(3000, () => {
    console.log("server start")
})

运行结果

优化之后

index.js

const http = require("http")
const route=require("./route.js")
http.createServer((req, res) => {
    const myurl = new URL(req.url, "http://127.0.0.1")
    // console.log(myurl.pathname)
   route[myurl.pathname](res)
    res.end()
}).listen(3000, () => {
    console.log("server start")
})

route.js

const fs = require("fs")
// function route(res,pathname){
//     switch (pathname) {
//         case "/login":
//             res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
//             res.write(fs.readFileSync("./static/login.html", "utf8"))
//             break
//         case "/home":
//             res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
//             res.write(fs.readFileSync("./static/home.html", "utf8"))
//             break
//         default:
//             res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
//             res.write(fs.readFileSync("./static/404.html", "utf8"))
//     }
// }
const route={
    "/login":(res)=>{
        res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/login.html", "utf8"))
    },
    "/home":(res)=>{
        res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/home.html", "utf8"))
    },
    "/404":(res)=>{
        res.writeHead(200, { "content-Type": "text/html;charset=utf-8" })
            res.write(fs.readFileSync("./static/404.html", "utf8"))
    }
}
module.exports = route

运行结果