Nodejs核心模块之net和http的使用详解

//tcp服务端
var net = require('net')
var sever=net.createServer(function(connection){
  //客户端关闭连接执行的事件
 connection.on('end',function(){
  //  console.log('客户端关闭连接')
 })
 connection.on('data',function(data){
  console.log('服务端：收到客户端发送数据为'+data.toString())
})
//给客户端响应的数据
 connection.write('response hello')
})
sever.listen(8080,function(){
  // console.log('监听端口')
})

//tcp客户端
var net = require('net')
var client = net.connect({port:8080},function(){
  // console.log("连接到服务器")
})
//客户端收到服务端执行的事件
client.on('data',function(data){
  console.log('客户端：收到服务端响应数据为'+data.toString())
  client.end()
})
//给服务端传递的数据
client.write('hello')
client.on('end',function(){
  // console.log('断开与服务器的连接')
})

//http服务端
const http = require("http");
var fs = require("fs");
var url = require('url')

http.createServer(function (req, res) {
  var urlPath = url.parse(req.url);
  var meth = req.method
  //urlPath.pathname 获取及设置URL的路径(path)部分
  //meth 获取请求数据的方法，一个路径只能被一种方法请求，其他方法请求时返回404
  if (urlPath.pathname === '/' && meth === 'GET') {
    res.write(' get ok');
  } else if (urlPath.pathname === '/users' && meth === 'POST') {
    res.writeHead(200, {
      'content-type': 'text/html;charset=utf-8'
    });
    fs.readFile('user.json', function (err, data) {
      if (err) {
        return console.error(err);
      }
      var data = data.toString();
      // 返回数据
      res.write(data);
    });
  } else if (urlPath.pathname === '/list' && meth === 'PUT') {
    res.write('put ok');
  } else if (urlPath.pathname === '/detail' && meth === 'DELETE') {
    res.write(' delete ok');
  } else {
    res.writeHead(404, {
      'content-type': 'text/html;charset=utf-8'
    });
    res.write('404')
  }
  res.on('data', function (data) {
    console.log(data.toString())
  })

}).listen(3000, function () {
  console.log("server start 3000");
});

//http客户端
const http = require("http");
// 发送请求的配置
let config = {
  host: "localhost",
  port: 3000,
  path:'/',
  method: "GET",
  headers: {
    a: 1
  }
};
// 创建客户端
let client = http.request(config, function(res) {
  // 接收服务端返回的数据
  let repData='';
  res.on("data", function(data) {
    repData=data.toString()
    console.log(repData)
  });
  res.on("end", function() {
    // console.log(Buffer.concat(arr).toString());
  });
});
// 发送请求
client.end();结束请求，否则服务器将不会收到信息

//http客户端
var http = require('http');
var querystring = require("querystring");
var contents = querystring.stringify({
  name: "艾利斯提",
  email: "m778941332@163.com",
  address: " chengdu",
});
var options = {
  host: "localhost",
  port: 3000,
  path:"/users",
  method: "POST",
  headers: {
    "Content-Type": "application/x-www-form-urlencoded",
    "Content-Length": contents.length
  }
};
var req = http.request(options, function (res) {
  res.setEncoding("utf8");
  res.on("data", function (data) {
    console.log(data);
  })
})

req.write(contents);
//结束请求，否则服务器将不会收到信息
req.end(); 
//响应的数据为
{
  "user1" : {
    "name" : "mahesh",
    "password" : "password1",
    "profession" : "teacher",
    "id": 1
  },
  "user2" : {
    "name" : "suresh",
    "password" : "password2",
    "profession" : "librarian",
    "id": 2
  }
 }

//http客户端
const http = require("http");
// 发送请求的配置
let config = {
  host: "localhost",
  port: 3000,
  path:"/list",
  method: "put",
  headers: {
    a: 1
  }
};
// 创建客户端
let client = http.request(config, function(res) {
  // 接收服务端返回的数据
  let repData='';
  res.on("data", function(data) {
    repData=data.toString()
    console.log(repData)
  });
  res.on("end", function() {
    // console.log(Buffer.concat(arr).toString());
  });
});
// 发送请求
client.end();

//http delete请求客户端
var http = require('http');
var querystring = require("querystring");
var contents = querystring.stringify({
  name: "艾利斯提",
  email: "m778941332@163.com",
  address: " chengdu",
});
var options = {
  host: "localhost",
  port: 3000,
  path:'/detail',
  method: "DELETE",
  headers: {
    "Content-Type": "application/x-www-form-urlencoded",
    "Content-Length": contents.length
  }
};
var req = http.request(options, function (res) {
  res.setEncoding("utf8");
  res.on("data", function (data) {
    console.log(data);
  })
})

req.write(contents);
req.end();