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

/**
 * Http.java<p>
 *
 *
 * Parse and return proper HTTP protocol field values such as
 * Accept, Content-length, Content-type, ...<p>
 *
 *
 * @version 1.0 aug-13-2002
 * @author Xiannong Meng
 */

class Http
{
    /*
     * Returns a hash table consisting of tokens in the header portion of the
     * response from a server.<p>
     *
     * @param inBuffer a buffer that contains the header of the response.
     * @return a hash table that contains pairs of name and value
     * 
     * @author Xiannong Meng
     *
     */
  public static Hashtable ParseToken(String inBuffer)
  {
      Hashtable form_data = new Hashtable();

      //
      //  Split the name value pairs at the new line
      //
      StringTokenizer pair_tokenizer = new StringTokenizer(inBuffer,"\n");

      String pair = pair_tokenizer.nextToken(); // skip command post/get
      while (pair_tokenizer.hasMoreTokens())
      {
          pair = pair_tokenizer.nextToken();
          //
          // Split into key and value
          //
          StringTokenizer keyval_tokenizer = new StringTokenizer(pair,":");
          String key = new String();
          String value = new String();
          if (keyval_tokenizer.hasMoreTokens())
            key = keyval_tokenizer.nextToken();
          else ; // ERROR - shouldn't ever occur
          if (keyval_tokenizer.hasMoreTokens())
            value = keyval_tokenizer.nextToken();
          else ; // ERROR - shouldn't ever occur
          //
          // Add key and associated value into the form_data Hashtable
          //
          form_data.put(key.toLowerCase(),value.toLowerCase());
      }

      return form_data;

  }

  /**
   *
   * Neatly format all of the form data using HTML.<p>
   *
   * @param form_data The Hashtable containing the form data which was
   * parsed using the ReadParse method.
   *
   * @return A String containing an HTML representation of all of the 
   * form variables and the associated values.
   *
   * @author Xiannong Meng
   *
   */
  public static String Variables(Hashtable form_data)
  {

      String returnString;

      returnString = "<dl compact>\n";

      for (Enumeration e = form_data.keys() ; e.hasMoreElements() ;)
      {
          String key = (String)e.nextElement();
          String value = (String)form_data.get(key);
          returnString += "<dt><b>" + key + "</b> <dd>:<i>" +
                          value +
                          "</i>:<br>\n";
      } 

      returnString += "</dl>\n";

      return returnString;

  }

}