formInputStreamParser.java

  public static MultivaluedMap<String, String> parseForm(InputStream entityStream)
           throws IOException
   {
      char[] buffer = new char[100];
      StringBuffer buf = new StringBuffer();
      BufferedReader reader = new BufferedReader(new InputStreamReader(entityStream));

      int wasRead = 0;
      do
      {
         wasRead = reader.read(buffer, 0, 100);
         if (wasRead > 0) buf.append(buffer, 0, wasRead);
      } while (wasRead > -1);

      String form = buf.toString();

      MultivaluedMap<String, String> formData = new MultivaluedMapImpl<String, String>();
      if ("".equals(form)) return formData;

      String[] params = form.split("&");

      for (String param : params)
      {
         if (param.indexOf('=') >= 0)
         {
            String[] nv = param.split("=");
            String val = nv.length > 1 ? nv[1] : "";
            formData.add(nv[0], val);
         }
         else
         {
            formData.add(param, "");
         }
      }
      return formData;
   }