import java.io.*;
import java.net.*;
import java.util.*;

public class HttpMessage {

  URL    servlet = null; 
  String args    = null; 

  public HttpMessage(URL servlet) 
  {
    this.servlet = servlet; 
  }

  public InputStream sendGetMessage() throws IOException 
  {
    return sendGetMessage(null); 
  } 

  public InputStream sendGetMessage(Properties args) throws IOException 
  { 
    String argString = ""; 

    if (args != null) { argString = "?" + toEncodedString(args); } 

    URL url           = new URL(servlet.toExternalForm() + argString); 
    URLConnection con = url.openConnection();

    con.setUseCaches(false); 
    return con.getInputStream(); 
  } 

  public InputStream sendPostMessage() throws IOException {
    return sendPostMessage(null); 
  } 

  public InputStream sendPostMessage(Properties args) throws IOException 
  {
    String argString = ""; 

    if (args != null) {
      argString = toEncodedString(args); 
    } 

    URLConnection con = servlet.openConnection(); 

    con.setDoInput(true); 
    con.setDoOutput(true); 
    con.setUseCaches(false); 
    con.setRequestProperty(
      "Content-Type", "application/x-www-form-urlencoded"
    ); 

    DataOutputStream out = new DataOutputStream(con.getOutputStream()); 
    out.writeBytes(argString); 
    out.flush(); 
    out.close(); 

    return con.getInputStream(); 
  } 

  private String toEncodedString(Properties args) 
  {
    StringBuffer buf = new StringBuffer();
    Enumeration names = args.propertyNames(); 
    while (names.hasMoreElements()) {
      String name = (String) names.nextElement(); 
      String value = args.getProperty(name); 
      buf.append(URLEncoder.encode(name) + "=" + URLEncoder.encode(value)); 
      if (names.hasMoreElements()) buf.append("&"); 
    } 
    return buf.toString(); 
  } 
}