HttpConnectionHelper.java

import java.io.*;
  import javax.microedition.io.*;
   
  public class HttpConnectionHelper {
 
    public interface Callback {
      void prepareRequest( String originalURL,
                           HttpConnection conn )
           throws IOException;
    }
   
    public static HttpConnection connect( String url )
                                   throws IOException {
      return connect( url, null );
    }
   
    public static HttpConnection connect(
            String url, Callback callback )
                         throws IOException {
      HttpConnection conn = null;
      String         originalURL = url;
   
      while( url != null ){
        conn = (HttpConnection)
                          Connector.open( url );
   
        if( callback != null ){
          callback.prepareRequest( originalURL,
conn );
        }
   
        int rc = conn.getResponseCode();
  
        switch( rc ){
            case HttpConnection.HTTP_MOVED_PERM:
            case HttpConnection.HTTP_MOVED_TEMP:
            case HttpConnection.HTTP_SEE_OTHER:
            case HttpConnection.HTTP_TEMP_REDIRECT:
              url = conn.getHeaderField( "Location" );
              if( url != null && url.startsWith(
                                            "/*" ) ){
                StringBuffer b = new StringBuffer();
                b.append( "http://" );
                b.append( conn.getHost() );
                b.append( ':' );
                b.append( conn.getPort() );
                b.append( url );
                url = b.toString();
              }
              conn.close();
              break;
            default:
              url = null;
              break;
        }
      }
   
      return conn;
   }
}