package org.apache.mina.http;
   
   import java.nio.ByteBuffer;
   import java.nio.charset.Charset;
   import java.nio.charset.CharsetEncoder;
   import java.util.Map;
   
   import org.apache.mina.core.buffer.IoBuffer;
   import org.apache.mina.core.session.IoSession;
  import org.apache.mina.filter.codec.ProtocolEncoder;
  import org.apache.mina.filter.codec.ProtocolEncoderOutput;
  import org.apache.mina.http.api.HttpEndOfContent;
  import org.apache.mina.http.api.HttpRequest;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class HttpClientEncoder implements ProtocolEncoder {
      private static final Logger LOG = LoggerFactory.getLogger(HttpClientCodec.class);
      private static final CharsetEncoder ENCODER = Charset.forName("UTF-8").newEncoder();
  
  	public void encode(IoSession session, Object message, ProtocolEncoderOutput out)
  			throws Exception {
  		LOG.debug("encode {}", message.getClass().getCanonicalName());
  		if (message instanceof HttpRequest) {
  			LOG.debug("HttpRequest");
  			HttpRequest msg = (HttpRequest)message;
  			StringBuilder sb = new StringBuilder(msg.getMethod().toString());
  			sb.append(" ");
  			sb.append(msg.getRequestPath());
  			if (!"".equals(msg.getQueryString())) {
  				sb.append("?");
  				sb.append(msg.getQueryString());
  			}
  			sb.append(" ");
  			sb.append(msg.getProtocolVersion());
  			sb.append("\r\n");
  
  			for (Map.Entry<String, String> header : msg.getHeaders().entrySet()) {
                  sb.append(header.getKey());
                  sb.append(": ");
                  sb.append(header.getValue());
                  sb.append("\r\n");
              }
              sb.append("\r\n");
              // Java 6 >> byte[] bytes = sb.toString().getBytes(Charset.forName("UTF-8"));
              // byte[] bytes = sb.toString().getBytes();
              // out.write(ByteBuffer.wrap(bytes));
              IoBuffer buf = IoBuffer.allocate(sb.length()).setAutoExpand(true);
              buf.putString(sb.toString(), ENCODER);
              buf.flip();
              out.write(buf);
          } else if (message instanceof ByteBuffer) {
          	LOG.debug("Body");
          	out.write(message);
          } else if (message instanceof HttpEndOfContent) {
          	LOG.debug("End of Content");
              // end of HTTP content
              // keep alive ?
  		}
  
  	}
  
  	public void dispose(IoSession arg0) throws Exception {
  		// TODO Auto-generated method stub
  
  	}
  
  }