Android Open Source - android-uds H T T P Remote Connection

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License

The source code is released under:

MIT License

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Java Source Code

package org.imazlwifu.uds.rpc;
/*from w  ww  . ja  v a2  s .co  m*/
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;

import org.imazlwifu.uds.LibConfig;
import org.imazlwifu.uds.model.Monitorable;

import android.util.Log;

/**
 * implementation of <code>RemoteConncetion</code>
 * @author se26082011
 *
 */
public class HTTPRemoteConnection implements RemoteConnection {
  private LibConfig uds = LibConfig.instance;
  
  public void publishData() {
    String dataString = buildDataString();
    
    HttpURLConnection connection = setupConnection( dataString.length() );
    
    DataOutputStream output = null;
    
    try {
      Log.d( "HTTPRemoteConnection", "connecting" );
      connection.connect();
      
      output = new DataOutputStream( connection.getOutputStream() );
      
      output.writeBytes( dataString );
      output.flush();
      
      Log.d( "HTTPRemoteConnection", "Response Code: "+ connection.getResponseCode() );
    } catch( IOException e ) {
      e.printStackTrace();
    } finally {
      if( output != null )
        try {
          output.close();
        } catch (IOException e) {}
    }
  }
  
  private String buildDataString() {
    StringBuilder b = new StringBuilder();
    
    for( Monitorable m : uds.getMonitorables() )
      if( uds.getPreference( m ) )
        for( String s : m.values().keySet() )
          b.append( convertSpaces( s ) +"="+ m.values().get( s ) +"&" );
    
    if( b.length() > 1 && b.charAt( b.length() - 1 ) == '&' )
      b.deleteCharAt( b.length() - 1 );
    
    Log.d( "HTTPRemoteConnection", "Data: "+ b.toString() );
    
    return b.toString();
  }

  /**
   * replaces empty spaces with their hexadecimal value prepended by '%'<br />
   * e.g. "Gravity Sensor" -> "Gravity%20Sensor"
   * 
   * @param s  
   * @return
   */
  private String convertSpaces( String s ) {
    return s.replace( " ", "%20" );
  }
  
  private HttpURLConnection setupConnection( int dataLength ) {
    HttpURLConnection connection = null;
    
    try {
      connection = (HttpURLConnection) uds.getRemoteAddress().openConnection();
      
      connection.setRequestMethod( "POST" );
      connection.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded" );
      connection.setRequestProperty( "Content-Length", "" + dataLength );
      
    } catch( IOException e ) {
      e.printStackTrace();
    }
    
    return connection;
  }
}

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