ssd8 exam1 代理服务器 java

 import java.io.*;
import java.net.*;
//java。lang。是默认导入的。
import java.lang.*;
public class ProxyServer {
    private static int PORT = 8000;
    static private String CRLF = “\r\n“;

    
    static class  Handler implements Runnable {
        private Socket socket;
           DataOutputStream OutToClient;
        BufferedReader InFromClient;
        DataOutputStream OutToServer;
        DataInputStream InFromServer;
        
        public Handler（Socket s） {
            Thread t;
            socket = s;
            t = new Thread（this “Handler Thread“）;
            t.start（）;
        }
        
        public void run（） {
            try {
                OutToClient = new DataOutputStream（socket.getOutputStream（））;
                InFromClient = new BufferedReader（new InputStreamReader（socket.getInputStream（）））;
                String getString = InFromClient.readLine（）;
                System.out.print（getString+‘\n‘）;
                String[] checkString = getString.split（“ “）;
                String url;
                Socket linkServer;
    
                int urlPort;
                if（checkString[0].equalsIgnoreCase（“GET“） ）{
                    linkServer = linkToServer（checkString[1]）;
                }else{
                    System.out.println（“invalid input!\n“）;
                    throw new IOException（“invalid input!\n“）;
                }
                
                
                
                OutToServer = new DataOutputStream（linkServer.getOutputStream（））;