Question

我想开发一个HTTP代理，代码在这里; 当我运行我的代码时，我得到了这个例外：

开始于：9999 请求：/ setwindowsagentaddr 遇到异常：java.net.MalformedURLException：无协议：/ setwindowsagentaddr

package proxy;
import java.net.*;
import java.io.*;


public static void main(String[] args) throws IOException {
    ServerSocket serverSocket = null;
    boolean listenning = true;
 //   String host="192.168.1.10";
    int port = 9999;

    try{
        port = Integer.parseInt(args[0]);
    }catch(Exception e){

    }

    try{
        serverSocket = new ServerSocket(port);

         System.out.println("Started on: " + port);
    }catch(Exception e){
//            System.err.println("Could not listen on port: " + args[0]);
        System.exit(0);
    }
    while(listenning){
    new ProxyThread(serverSocket.accept()).start();

    }
    serverSocket.close();

}

}

和ProxyThread：

public class ProxyThread extends Thread {
private Socket socket  = null;
private static final int BUFFER_SIZE = 32768;


public ProxyThread(Socket socket){
    super("Proxy Thread");
    this.socket=socket;
}

public void run(){



    try {
        DataOutputStream out = new DataOutputStream(socket.getOutputStream());
        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

        String inputLine , outputLine;
        int cnt = 0 ;
        String urlToCall="";



        //get request from client
       // socket.getPort();


        while((inputLine=in.readLine()) != null){
            try{
            StringTokenizer tok = new StringTokenizer(inputLine);

            tok.nextToken();
            }catch(Exception e){
                break;
            }
            ///parse the first line of the request to get url
            if(cnt==0){
                String [] tokens = inputLine.split(" ");
           urlToCall = tokens[1];
                System.out.println("request for : "+ urlToCall);


            }
            cnt++;





            }

        BufferedReader rd = null;
        try{
               //System.out.println("sending request
    //to real server for url: "
            //        + urlToCall);
            ///////////////////////////////////
            //begin send request to server, get response from server
            URL url = new URL(urlToCall);
            URLConnection conn = url.openConnection();
            conn.setDoInput(true);
            //not doing http post
            conn.setDoOutput(false);
            System.out.println("Type is : "+ conn.getContentType());
            System.out.println("length is : "+ conn.getContentLength());
            System.out.println("allow user interaction :"+     conn.getAllowUserInteraction());
            System.out.println("content encoding : "+ conn.getContentEncoding());
            System.out.println("type is : "+conn.getContentType());

            // Get the response
            InputStream is = null;
            HttpURLConnection huc = (HttpURLConnection) conn;
              if (conn.getContentLength() > 0) {
                try {
                    is = conn.getInputStream();
                    rd = new BufferedReader(new InputStreamReader(is));
                } catch (IOException ioe) {
                    System.out.println(
            "********* IO EXCEPTION **********: " + ioe);
                }

            }

               //end send request to server, get response from server
               //begin send response to client

              byte [] by = new byte[BUFFER_SIZE];
              int index = is.read(by,0,BUFFER_SIZE);
                while ( index != -1 )
            {
              out.write( by, 0, index );
              index = is.read( by, 0, BUFFER_SIZE );
            }
            out.flush();
             //end send response to client


        }catch(Exception e){
             //can redirect this to error log
            System.err.println("Encountered exception: " + e);
            //encountered error - just send nothing back, so
            //processing can continue
            out.writeBytes("");
        }

         //close out all resources
        if (rd != null) {
            rd.close();
        }
        if (out != null) {
            out.close();
        }
        if (in != null) {
            in.close();
        }
        if (socket != null) {
            socket.close();
        }


    } catch (Exception e) {
         e.printStackTrace();
    }

}

如何修复此异常？

Answer 1

所以错误不是说谎，/ setwindowsagentaddr不是一个有效的网址。它如何知道使用什么协议？

尝试使用http://localhost:8080/setwindowsagentaddr

之类的内容

例外：java.net.MalformedURLException：无协议：/ setwindowsagentaddr

1 个答案: