手写简版无三方依赖的Node-Server实现示例

http.createServer(function (request, response) {
    // 发送 HTTP 头部 
    // HTTP 状态值: 200 : OK
    // 内容类型: text/plain
    response.writeHead(200, {'Content-Type': 'text/plain'});
    // 发送响应数据 "Hello World"
    response.end('Hello World\n');
}).listen(8888);
// 这就开启了一个最基础的node服务，浏览器访问 http://127.0.0.1:8888 即可看到Hello World

function geFileList(path) {
    var filesList = [];
    readFile(path, filesList);
    return filesList;
}
//获取文件类型
function getType(filename){
    var index=filename.lastIndexOf(".");
    if(index!=-1){
        var type=filename.substring(index+1,filename.length);
        return type;
    }
}
//遍历读取文件 
function readFile(path, filesList) {
    files = fs.readdirSync(path);//需要用到同步读取 
    files.forEach(walk);
    function walk(file) {
        states = fs.statSync(path + '/' + file);
        if (states.isDirectory()) {
            readFile(path + '/' + file, filesList);
        }
        else {
            var obj = new Object();
            obj.size = states.size;
            obj.name = file;//文件名 
            obj.type = getType(file)
            filesList.push(obj);
        }
    }
}
// 统计各类文件数量
function countFileByType(obj){
    var keyContainer = {}; 
    obj.forEach(item => {
      keyContainer[item.type] = keyContainer[item.type] || [];
      keyContainer[item.type].push(item);
    });
    return keyContainer
}
module.exports.geFileList = geFileList
module.exports.countFile = countFileByType
module.exports.getType = getType
//方法模块化，把文件读取操作剥离比较容易整理思路，emmmmmmm，但是写的不是很优雅，有待改进

const os = require('os');
const getlocalIp = () => {
    var interfaces = os.networkInterfaces();
    var ipArr = []
    for (var devName in interfaces) {
        var iface = interfaces[devName];
        for (var i = 0; i < iface.length; i++) {
            var alias = iface[i];
            if (alias.family == 'IPv4' && alias.address !== '127.0.0.1' && !alias.internal) {
                ipArr.push(alias.address)
            }
        }
    }
    return ipArr
}
const getWlanIp = () => {
    var interfaces = os.networkInterfaces().WLAN
    var WlanIp = ''
    for(let ip of interfaces){
        if(ip.family=='IPv4'){
            WlanIp = ip.address
        }
    }
    return WlanIp
}
module.exports.getlocalIp = getlocalIp
module.exports.getWlanIp = getWlanIp 
// 为什么这里要留两种ip地址呢，因为有时候我们也需要开启一个非局域网ip的服务啦，多功能加成

const http = require('http');
const fs = require('fs');
const Ip = require('../lib/get-ip')
const F = require('../lib/get-file')
const root = process.cwd();  //当前目录
const port = Math.floor(Math.random () * 1000) + 8000;
var localIP = Ip.getlocalIp()
var wlanIp = Ip.getWlanIp() || localIP[0]

function setHttpServer() {
    await setConsoleInfo();
    await fs.exists('index.html',function(exists){
    if(!exists){
            openDefaultBrowser(`http://`+wlanIp+':'+port)
          }else{
            openDefaultBrowser(`http://`+wlanIp+':'+port+'/index.html')
          }
    })
}

server=http.createServer(function(req,res){
    if(req.url === '/favicon.ico') {
        // console.log('\033[42;30m DONE \033[40;32m Compiled successfully in 19987ms\033[0m')
    }else{
        var url=req.url;
        var file = root+url;
        fs.readFile(file,function(err,data){
            if(err){
                res.writeHeader(404,{
                    'content-type' : 'text/html;charset="utf-8"'
                });
                if(!F.countFile(F.geFileList(root)).html){
                    res.write('<h1>404页面</h1><p><h2>当前目录没有html文件</h2>')
                }else{
                    let fileList =  fs.readdirSync(`${file}`);
                    for(let f of fileList){
                        let type = F.getType(f)
                        if(type=='html'){
                            res.write('<br/>'+`<a href="${f}" rel="external nofollow" >${f}</a>`+'\n')
                        }
                    }
                }
                res.end();
            }else{
                var surl = '.'+url;
                var type = surl.substr(surl.lastIndexOf(".")+1,surl.length)
                res.writeHeader(200,{
                    'content-type' : "text/"+type+';'+'charset="utf-8"'
                });
                res.write(data);
                res.end();
            }
        })  
    } 
}).listen(port);

function setConsoleInfo(){
  let info = 'The default service has been opened in the browser!'
    console.log('\033[42;30m DONE \033[;32m' + info + '\033[0m')
    for(let dev of localIP){
        console.log(`${dev}`+':'+port)
    }
}

function openDefaultBrowser(url) {
  var exec = require('child_process').exec;
  switch (process.platform) {
    case "darwin":
      exec('open ' + url);
      break;
    case "win32":
      exec('start ' + url);
      break;
    default:
      exec('xdg-open', [url]);
  }
}

npm i set-node-server
set-server / ss