nodejs 如何手动实现服务器

let numRe = /\d+/g;
console.log("123dsgfas 12434 sdfasdf234dagsdfg".match(numRe));

const http = require("http")
//开启一个监听8080端口的静态服务
http.createServer(function(req, res){
 console.log("==>", req.url);
 if (req.url === "/1.html"){
  res.write("you have request 1.html");
 }else if (req.url === "/2.html") {
  res.write("you have request 2.html");
 }else{
  res.write("404(page not found)");
 }
 res.end();
}).listen(8080)

const fs = require("fs");
// 写入文件
fs.writeFile("HelloWorld.txt", "HelloWorld HelloNode", function(err){
 if(err){
  console.log(err);
 }
 // 读取刚刚写入的数据
 else{
  fs.readFile("HelloWorld.txt", function(err, data) {
   if(err){
    console.log(err);
   }else{
    console.log(data.toString());
   }
  })
 }
})

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


http.createServer(function(req, res){
 // 打开 www/ 目录下的文件
 fs.readFile("./www/"+req.url, function(err, data) {
  if(err){
   console.log(err);
   res.write("404");
   res.end();
  }else{
   console.log(data.toString())
   res.write(data);
   res.end();
  }
 })

}).listen(8080)

const http = require("http");
const url = require("url");

http.createServer(function(req, res){
 let reqObj = url.parse(req.url, true)
 let urlPath = reqObj.path;
 let urlData = reqObj.query;
 let log = "==>urlPath:" + urlPath +"==>>urlData:"+ JSON.stringify(urlData);
 console.log(log);
 res.write(log);
 res.end();
}).listen(6060)

const http = require("http");
const querystring = require("querystring");

http.createServer(function(req, res){
 let dataStr = '';
 let i = 0;
 req.on("data", function(data){
  dataStr+=data;
  console.log(`第${i++}次收到数据`);
 })

 req.on("end", function(){
  console.log("end");
  let parseData = querystring.parse(dataStr);
  console.log("parseData:", parseData);
  res.write(new Buffer(dataStr, "utf8"));
  res.end();
 })

}).listen(8800)

const http = require("http");
const fs = require("fs");
const querystring = require("querystring");

/*
*1. 访问www内的静态资源
*2. 解析get请求, 并保存到serverLog.txt
*3. 解析post请求serverLog.txt
*/

// 获取当前时间
function getNowDate(){
  let dt = new Date();

  let year = dt.getFullYear();
  let month = dt.getMonth();
  let day = dt.getDate();
  // 将月份加1
  month = month + 1;
  // 将月份补齐到两位
  if (month <= 9){
    month = "0" + month;
  }

  // 将日补齐到两位
  if (day <= 9){
    day = "0" + day;
  }

  let hour = dt.getHours();
  let minutes = dt.getMinutes();
  let seconds = dt.getSeconds();


  return year+"-"+month+"-"+day+"-"+hour+"-"+minutes+"-"+seconds;
}

http.createServer(function(req, res){
 // 1. 尝试访问www下的静态资源
 fs.readFile("./www"+req.url, function(err, data){
  if(err){
   //2. 解析请求的参数, 并保存到log
   if(req.method === "GET"){
    console.log("收到了GET请求")
    let getData = querystring.parse(req.url.split("?")[1]);
    console.log("获得的get数据为==>",getData);
    fs.writeFile("./serverLog.txt", getNowDate()+"\n"+JSON.stringify(getData)+"\n", {flag: 'a'},function(err){
     if(err){
      console.log(err);
      console.log("GET数据保存至log出错");
     }

    });
   }else if (req.method == "POST") {
    console.log("收到了POST请求")
    let tmpData = ''
    req.on("data", function(data){
     tmpData+=data;
    });

    req.on("end", function(){
     let postData = querystring.parse(tmpData);
     console.log("获得的post数据为==>", postData);

     fs.writeFile("./serverLog.txt",getNowDate()+"\n"+JSON.stringify(postData)+"\n", {flag: 'a'},function(err){
      if(err){
       console.log(err);
       console.log("POST数据保存至log出错");
      }

     });
    })
   }
   res.write("404");
   res.end();
  }else{
   res.write(data);
   res.end();
  }
 })


}).listen(8000)

import requests

requests.get("http://127.0.0.1:8000/?name=zhaozhao&age=18&method=GET")

requests.post("http://127.0.0.1:8000", data={"name": "zhaozhao", "age": 18, "method": "POST"})