代理服務器沒有得到服務器的響應

Question

這是我第一次製作網絡服務器。我想創建一個代理服務器。目前，我將服務器設置爲「www.google.com」，而不是對HTTP請求進行任何解析。

我在命令行上運行ProxyServer，然後在另一個命令行窗口中使用「telnet server_name 5000」調用服務器，然後調用「GET/HTTP/1.1」。

一切工作，直到處理服務器響應的while循環。沒有打印出來。爲什麼？

所有幫助表示讚賞。

import java.net.*; 
import java.io.*; 

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

    int proxyServerPortNumber = 5000; 
    String hostName = "www.google.com"; 
    int portNumber = 80; 


    try { 
     // SERVER 
     // Open socket connection and bind it to proxyServerPortNumber 
     ServerSocket serverSocket = 
      new ServerSocket(proxyServerPortNumber); 

     // Listen and accept request 
     Socket clientSocket = serverSocket.accept();  
     System.out.println("client request accepted"); 

     // send to client socket 
     PrintWriter sendToClient = 
      new PrintWriter(clientSocket.getOutputStream(), true);  

     // get from client socket   
     BufferedReader getFromClient = new BufferedReader(
      new InputStreamReader(clientSocket.getInputStream())); 

     // CLIENT 
     // open socket connection 
     Socket echoSocket = new Socket(hostName, portNumber); 

     // send to server 
     PrintWriter out = 
      new PrintWriter(echoSocket.getOutputStream(), true); 

     // get from server 
     BufferedReader in = 
      new BufferedReader(
       new InputStreamReader(echoSocket.getInputStream())); 


     String clientRequest; 
     // clientRequest = "GET/HTTP/1.1\r\n\r\n"; 
     while ((clientRequest = getFromClient.readLine()) != null) { 
      System.out.println("in while loop"); 
      System.out.println(clientRequest); 

      out.println(clientRequest); // send to server 
      System.out.println("sent to server"); 

      //Get response from server 
      String response; 
      while ((response = in.readLine()) != null) // no response why? 
      { 
       sendToClient.println("echo: " + response); 
       System.out.println("echo:" + response); 
      }  
     } // end while loop 


    } catch (IOException e) { 
     System.out.println("Exception caught when trying to listen on port " 
      + portNumber + " or listening for a connection"); 
     System.out.println(e.getMessage()); 
    } 


} 
} 

Answer 1

HTTP請求中的反斜槓應該是正斜槓。