Gateway Tutorial: VXML Application | Record Email Servlet

This Servlet class is used to record a message over the phone. The recording is accomplished by the following VXML segment.

    <record name="content">
      <filled>
        <prompt>
          <audio src="/audio/${GW_RECORDED_VOICE}/wait_while_conn.wav"/>
        </prompt>
        <submit next="sendEmail" namelist="name index content"/>
      </filled>
    </record>

The recorded content is saved in the field variable content, and it is sent as a parameter for the sendEmail VXML file, which corresponds to SendEmailServlet.

Source Code

package vx.apps.email;

import java.io.PrintWriter;
import java.io.IOException;
import javax.servlet.http.*;


public class RecordEmailServlet extends HttpServlet
{
  public void service(HttpServletRequest request,
                      HttpServletResponse response)
    throws IOException
  {
    HttpSession session = request.getSession(true);
    EmailMessageReader emailReader =
                (EmailMessageReader) session.getAttribute("emailReader");
    if (emailReader == null) {
        emailReader = new EmailMessageReader();
        session.setAttribute("emailReader", emailReader);
    }

    PrintWriter pw = response.getWriter();

    pw.println("<?xml version=\"1.0\"?>");
    pw.println("<vxml version=\"1.0\">");

    EmailManager email_agent = EmailManager.getInstance(request);
    if (email_agent == null) {
        pw.println("</vxml>");
        return;
    }

    String name = request.getParameter("name");
    if (name == null)
        name = "";
    String indexstr = request.getParameter("index");
    if (indexstr == null)
        indexstr = "";

    pw.println("<form id=\"recordemail\">");

    pw.println(" <var name=\"name\" expr=\"'" + name + "'\"/>");
    pw.println(" <var name=\"index\" expr=\"'" + indexstr + "'\"/>");

    pw.println(" <dtmf>");
    pw.println(" textmsg = $digits");
    pw.println(" </dtmf>");

    pw.println(" <initial name=\"choice\">");
    pw.println(" <prompt timeout=\"1s\">");
    pw.println(" <audio src=\"/audio/${GW_RECORDED_VOICE}/
                 record_msg.wav\"/>");
    pw.println(" <audio src=\"/audio/${GW_RECORDED_VOICE}/
                 finish_press_pound.wav\"/>");
    pw.println(" </prompt>");
    pw.println(" <noinput>");
    pw.println(" <assign name=\"choice\" expr=\"'recordmsg'\"/>");
    pw.println(" </noinput>");
    pw.println(" </initial>");

    pw.println(" <record name=\"content\">");
    pw.println(" <filled>");
    pw.println(" <prompt>");
    pw.println(" <audio src=\"/audio/${GW_RECORDED_VOICE}/
                 wait_while_conn.wav\"/>");
    pw.println(" </prompt>");
    pw.println(" <submit next=\"sendEmail\"
                namelist=\"name index content\"/>");
    pw.println(" </filled>");
    pw.println(" </record>");

    pw.println(" <filled namelist=\"textmsg\">");
    pw.println(" <if cond=\"textmsg.length == 0\">");
    pw.println(" empty message. please try again.");
    pw.println(" <clear/>");
    pw.println(" <else/>");
    pw.println(" <prompt>");
    pw.println(" <audio src=\"/audio/${GW_RECORDED_VOICE}/
                wait_while_conn.wav\"/>");
    pw.println(" </prompt>");
    pw.println(" <submit next=\"sendTextEmail\"
                namelist=\"name index textmsg\"/>");
    pw.println(" </if>");
    pw.println(" </filled>");

    pw.println("</form>");
    pw.println("</vxml>");
  }
}