使用socketServer编写的服务端接收浏览器请求为什么会执行两次

密封罐子 2017-06-27 10:15:19

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;



public class MyTomcat {

	

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

			System.out.println("server start");

			

			ServerSocket ss = new ServerSocket(8888);

			while(true){

				Socket s = ss.accept();

				String ip = s.getInetAddress().getHostAddress();

				new Thread(new Task(s)).start();

			}

		}

	}



class Task implements Runnable{

	private Socket s;

	

	public Task(Socket s){

		this.s = s;

	}

	

	@Override

	public void run() {

		String ip = s.getInetAddress().getHostAddress();

		System.out.println(ip+"...connected");

		//

		PrintWriter out;

		try {

			InputStream in = s.getInputStream();

			byte[] buf = new byte[1024];

			int len = 0;

			len = in.read(buf);

			String msg = new String(buf, 0, len);

			System.out.println(msg);

			

			out = new PrintWriter(s.getOutputStream(),true);

			out.println("HTTP/1.1 200 OK");

			out.println("Content-Type: text/html;charset=ISO-8859-1");

			out.println("");

			out.println("<html><body><font color='red'>hello china</font></body></html>");

			System.out.println("ssssss");

			s.close();

		} catch (IOException e) {

			e.printStackTrace();

		}

	}

	

}

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密封罐子 2017-06-29

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多谢大神帮助。给分！

soton_dolphin 2017-06-27

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你这么写，应该会产生无穷多个线程啊，是不是执行两次程序就歇菜了？

密封罐子 2017-06-27

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代码如上 run中的代码执行了两次，为什么啊？

110成成 2017-06-27

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其实这个是浏览器导致的，不知道你有没有去看下请求的数据。 127.0.0.1...connected 127.0.0.1...connected GET / HTTP/1.1 Host: 127.0.0.1:8888 Connection: keep-alive Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36 Accept-Encoding: gzip, deflate, sdch Accept-Language: zh-CN,zh;q=0.8 Cookie: csrftoken=ynjKNfUCisdHq5ou0zoL8wQ4CLtPa2bC; _ga=GA1.1.1036223549.1491903960 ssssss GET /favicon.ico HTTP/1.1 Host: 127.0.0.1:8888 Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36 Accept: */* Referer: http://127.0.0.1:8888/ Accept-Encoding: gzip, deflate, sdch Accept-Language: zh-CN,zh;q=0.8 Cookie: csrftoken=ynjKNfUCisdHq5ou0zoL8wQ4CLtPa2bC; _ga=GA1.1.1036223549.1491903960 ssssss 注意看第二次，它的请求是GET /favicon.ico HTTP/1.1 这是浏览器秘密去请求的，这是浏览器自带的机制，会自动的向服务器发出这样的图片请求。以做搜藏。所以你会收到多个请求，但是你在你的代码没有去过滤这种请求。