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8.0

URLConnection with Proxy & Domain

Asked by jbrizal in Java Programming Language

Tags: urlconnection, proxy

Hai ..  

I try to use this function but my pc not join to any domain and using proxy server to connect to internet ..

i try this .. function

the problem is .. i need pass DOMAIN name to connect to internet ...

please give me advice .. thank .


// The Authenticator class ******************************
import java.io.*;
import java.net.*;

public class URLAuthenticator {
 /**
  * The alphabet dictionary used for encoding
  */
 public static final char [ ]  alphabet = {
 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',   //  0 to  7
 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',   //  8 to 15
 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',   // 16 to 23
 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',   // 24 to 31
 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',   // 32 to 39
 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',   // 40 to 47
 'w', 'x', 'y', 'z', '0', '1', '2', '3',   // 48 to 55
 '4', '5', '6', '7', '8', '9', '+', '/' }; // 56 to 63

 /**
  * Encode a string
  * @param s the string to encode
  * @return the encoded string
  */
 public static String encode(String s) {
   return encode(s.getBytes());
 }

 /**
  * Encode a byte[] array
  * @param octetString the byte[] buffer to encode
  * @return the encoded string
  */
 public static String encode(byte[] octetString) {
   int  bits24;
   int  bits6;
   char[] out = new char[((octetString.length - 1) / 3 + 1) * 4];
   int outIndex = 0;
   int i = 0;
   while ((i + 3) <= octetString.length) {
     // store the octets
     bits24 = (octetString[i++] & 0xFF ) << 16;
     bits24 |= (octetString[i++] & 0xFF ) << 8;
     bits24 |= (octetString[i++] & 0xFF ) << 0;
     bits6 = (bits24 & 0x00FC0000) >> 18;
     out[outIndex++] = alphabet[bits6];
     bits6 = (bits24 & 0x0003F000) >> 12;
     out[outIndex++] = alphabet[bits6];
     bits6 = (bits24 & 0x00000FC0) >> 6;
     out[outIndex++] = alphabet[bits6];
     bits6 = (bits24 & 0x0000003F);
     out[outIndex++] = alphabet[bits6];
   }
   if (octetString.length - i == 2) {
     // store the octets
     bits24 = (octetString[i] & 0xFF ) << 16;
     bits24 |= (octetString[i + 1] & 0xFF) << 8;
     bits6 = (bits24 & 0x00FC0000) >> 18;
     out[outIndex++] = alphabet[bits6];
     bits6 = (bits24 & 0x0003F000) >> 12;
     out[outIndex++] = alphabet[bits6];
     bits6 = (bits24 & 0x00000FC0) >> 6;
     out[outIndex++] = alphabet[bits6];
     // padding
     out[outIndex++] = '=';
   } else if (octetString.length - i == 1) {
     // store the octets
     bits24 = (octetString[i] & 0xFF) << 16;
     bits6 = (bits24 & 0x00FC0000) >> 18;
     out[outIndex++] = alphabet[bits6];
     bits6 = (bits24 & 0x0003F000) >> 12;
     out[outIndex++] = alphabet[bits6];
     // padding
     out[outIndex++] = '=';
     out[outIndex++] = '=';
   }
   return new String(out);
 }

 
public static void authenticate(URLConnection uc, String user, String password) {
    String encoding = encode((user + ":" + password).getBytes());
    uc.setRequestProperty("Authorization", "Basic " + encoding);
}

 /**
  * Create an authenticated URLConnection
  * @param u the URL to open the connection from
  * @param user the users name
  * @param password the users password
  * @return the authenticated URLConnection
  */
 public static URLConnection openConnection(URL u, String user, String password) {
   URLConnection result = null;
   try {
     result = u.openConnection();
     if (result != null) {
       authenticate(result, user, password);
     }
   } catch (Exception ex) {
     ex.printStackTrace();
   }
   return result;
 }

 /**
  * Get a URL content object through an authenticated URLConnection
  * @param u the URL to get the content from
  * @param user the users name
  * @param password the users password
  * @return the content of the URL
  */
 public static Object getContent(URL u, String user, String password) {
   Object result = null;

   try {
     URLConnection uc = openConnection(u, user, password);
     if (uc != null) {
       result = uc.getContent();
     }
   } catch (Exception ex) {
     ex.printStackTrace();
   }
   return result;
 }

 /**
  * Get a URL InputStream object through an authenticated URLConnection
  * @param u the URL to get the InputStream object from
  * @param user the users name
  * @param password the users password
  * @return the InputStream object of the URL
  */
 public static InputStream openStream(URL u, String user, String password) {
   InputStream result = null;
   try {
     URLConnection uc = openConnection(u, user, password);
     if (uc != null) {
     result = uc.getInputStream();
   }
   } catch (Exception ex) {
     ex.printStackTrace();
   }
   return result;
 }

 public static void main(String args[])throws Exception {
   URL loader = null;
   String line = "";
   
   System.setProperty("java.protocol.handler.pkgs","com.sun.net.ssl.internal.www.protocol");
   
   System.setProperty("proxyHost", "10.8.0.6");
   System.setProperty("proxyPort", "80");
   
   try {
     loader = new URL("http://www.yahoo.com.sg");
   } catch(MalformedURLException mue) {
     System.out.println("Invalid URL !");
   }
   try {
     URLConnection con = URLAuthenticator.openConnection(loader, user_name, password);
     
   new InputStreamReader(con.getInputStream());
     
     BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
     while ((line = br.readLine()) != null)
       if(line!=null)
       System.out.println(line);
     br.close();
   
   }
   catch(IOException e) {
      e.printStackTrace();
   }
 
 }

}
[+][-]06/04/02 04:56 AM, ID: 7053513Accepted Solution

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About this solution

Zone: Java Programming Language
Tags: urlconnection, proxy
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Solution Provided By: userquin
Participating Experts: 2
Solution Grade: A
 
 
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