Java - Webserver Http

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class WebServer {

    public static void main(String[] args) throws Exception {

        

        ExecutorService pool = Executors.newFixedThreadPool(4);

                

        //1.서버소켓 생성

        ServerSocket server = new ServerSocket(8085);

        

        while(true) {

            System.out.println("요청 대기");

            //2. 요청이 있으면 수락

            Socket socket = server.accept();

            System.out.println("요청 수락");

            //스레드가 할 일

            Runnable run = new Runnable() {             

                @Override

                public void run() {

                    //3. http 프로토콜로 오는 데이터 수신

                    try {

                        DataInputStream dis = new DataInputStream(socket.getInputStream());                     

                        byte[] arr = new byte[65536];

                        dis.read(arr);

                        String request = new String(arr);

                        System.out.println(request);

                        arr = new byte[65536];

                    } catch (IOException e) {

                        e.printStackTrace();

                    }                   

                    //4. 응답

                }

            };      

            //submit 은 기본적으로 반환값이 없음/실패한 스레드도 재사용

            pool.submit(run);

        }

    }

}

결과 ->

GET / HTTP/1.1

Host: localhost:8085

Connection: keep-alive

User-Agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Upgrade-Insecure-Requests: 1

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8

Accept-Encoding: gzip, deflate, br

Accept-Language: ko-KR,ko;q=0.9,en-US;q=0.8,en;q=0.7

Cookie: darkness_stats={"analyticsId":"59547866d8","installDate":1515546591345,"installVer":"1.0.0","type":"p"}