[英]Proxy server does not get response from server
這是我第一次制作網絡服務器。 我想創建一個代理服務器。 現在,我將服務器設置為“ www.google.com”,並且不進行任何HTTP請求解析。
我在命令行上運行ProxyServer,然后在另一個命令行窗口上使用“ telnet server_name 5000”,然后是“ GET / HTTP / 1.1”來調用服務器。
一切正常,直到處理服務器響應的while循環。 什么都沒有打印出來。 為什么會這樣?
所有幫助表示贊賞。
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());
}
}
}
HTTP請求中的反斜杠應為正斜杠。
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