@Override
  /**
   * Returns the size of the image in bytes.
   *
   * @param sourceString the image link.
   * @return the file size in bytes of the image link provided; -1 if the size isn't available or
   *     exceeds the max allowed image size.
   */
  public int getImageSize(String sourceString) {
    int length = -1;
    try {

      URL url = new URL(sourceString);
      String protocol = url.getProtocol();
      if (protocol.equals("http") || protocol.equals("https")) {
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        length = connection.getContentLength();
        connection.disconnect();
      } else if (protocol.equals("ftp")) {
        FTPUtils ftp = new FTPUtils(sourceString);
        length = ftp.getSize();
        ftp.disconnect();
      }

      if (length > imgMaxSize) {
        length = -1;
      }
    } catch (Exception e) {
      logger.debug("Failed to get the length of the image in bytes", e);
    }
    return length;
  }
 /**
  * Returns true if the content type of the resource pointed by sourceString is an image.
  *
  * @param sourceString the original image link.
  * @return true if the content type of the resource pointed by sourceString is an image.
  */
 @Override
 public boolean isDirectImage(String sourceString) {
   boolean isDirectImage = false;
   try {
     URL url = new URL(sourceString);
     String protocol = url.getProtocol();
     if (protocol.equals("http") || protocol.equals("https")) {
       HttpURLConnection connection = (HttpURLConnection) url.openConnection();
       isDirectImage = connection.getContentType().contains("image");
       connection.disconnect();
     } else if (protocol.equals("ftp")) {
       if (sourceString.endsWith(".png")
           || sourceString.endsWith(".jpg")
           || sourceString.endsWith(".gif")) {
         isDirectImage = true;
       }
     }
   } catch (Exception e) {
     logger.debug("Failed to retrieve content type information for" + sourceString, e);
   }
   return isDirectImage;
 }
  /**
   * Creates this account on the server.
   *
   * @return the created account
   */
  public NewAccount createAccount() {
    // Check if the two passwords match.
    String pass1 = new String(passField.getPassword());
    String pass2 = new String(retypePassField.getPassword());
    if (!pass1.equals(pass2)) {
      showErrorMessage(
          IppiAccRegWizzActivator.getResources()
              .getI18NString("plugin.sipaccregwizz.NOT_SAME_PASSWORD"));

      return null;
    }

    NewAccount newAccount = null;
    try {
      StringBuilder registerLinkBuilder = new StringBuilder(registerLink);
      registerLinkBuilder
          .append(URLEncoder.encode("email", "UTF-8"))
          .append("=")
          .append(URLEncoder.encode(emailField.getText(), "UTF-8"))
          .append("&")
          .append(URLEncoder.encode("password", "UTF-8"))
          .append("=")
          .append(URLEncoder.encode(new String(passField.getPassword()), "UTF-8"))
          .append("&")
          .append(URLEncoder.encode("display_name", "UTF-8"))
          .append("=")
          .append(URLEncoder.encode(displayNameField.getText(), "UTF-8"))
          .append("&")
          .append(URLEncoder.encode("username", "UTF-8"))
          .append("=")
          .append(URLEncoder.encode(usernameField.getText(), "UTF-8"))
          .append("&")
          .append(URLEncoder.encode("user_agent", "UTF-8"))
          .append("=")
          .append(URLEncoder.encode("sip-communicator.org", "UTF-8"));

      URL url = new URL(registerLinkBuilder.toString());
      URLConnection conn = url.openConnection();

      // If this is not an http connection we have nothing to do here.
      if (!(conn instanceof HttpURLConnection)) {
        return null;
      }

      HttpURLConnection httpConn = (HttpURLConnection) conn;

      int responseCode = httpConn.getResponseCode();

      if (responseCode == HttpURLConnection.HTTP_OK) {
        // Read all the text returned by the server
        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String str;

        StringBuffer stringBuffer = new StringBuffer();
        while ((str = in.readLine()) != null) {
          stringBuffer.append(str);
        }

        if (logger.isInfoEnabled())
          logger.info("JSON response to create account request: " + stringBuffer.toString());

        newAccount = parseHttpResponse(stringBuffer.toString());
      }
    } catch (MalformedURLException e1) {
      if (logger.isInfoEnabled())
        logger.info("Failed to create URL with string: " + registerLink, e1);
    } catch (IOException e1) {
      if (logger.isInfoEnabled()) logger.info("Failed to open connection.", e1);
    }
    return newAccount;
  }