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http协议是使用非常广泛的网络协议,作为网站开发人员,了解http协议是十分重要的。
但是,我不想读官方的http文档,我想直接自己去一点点了解http协议,通过编写socket与浏览器通信。代码如下
import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.ServerSocket;import java.net.Socket;public class Server { public static void main(String args[]) throws IOException{ ServerSocket server = new ServerSocket(2222); while(true){ try{ Socket client = server.accept(); OutputStream out = client.getOutputStream(); DataOutputStream outStream = new DataOutputStream(client.getOutputStream()); outStream.write("Hello".getBytes()); InputStream in = client.getInputStream(); byte[] buf = new byte[1024]; in.read(buf); in.close(); System.out.println("request from client " + client.getInetAddress().getHostAddress()); System.out.println(new String(buf)); client.close(); }catch(Exception e){ e.printStackTrace(); } } }}
结果如下:
request from client 127.0.0.1
GET /favicon.ico HTTP/1.1 Host: 127.0.0.1:2222 Connection: keep-alive Accept: */* User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1622.7 Safari/537.36 Accept-Encoding: gzip,deflate,sdch Accept-Language: zh-CN,zh;q=0.8,en;q=0.6 Cookie: csrftoken=4q6evAi7r0Y72QnhEwXQn8WZgZQr8JTb
从第二行开始就是http协议的header部分了。
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