Gateway Tutorial: VXML Application | Email Include Servlet

This is the Servlet for reading email attachment. If the attachment is an audio file, it is redirected to readEmailWave, which corresponds to ReadEmailWaveServlet.

Source Code

package vx.apps.email;

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


public class EmailIncServlet 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 indexstr = request.getParameter("index");

    String includeIndexStr = request.getParameter("includeidx");
    if (includeIndexStr == null)
        includeIndexStr = "0";
    int includeIndex = Integer.parseInt(includeIndexStr);

    Part include = emailReader.getIncludeFile(includeIndex);

    String nextstr = ((includeIndex == 0)? "" : "next");

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

    if (include != null) {
        pw.println("<field name=\"wantReadFile\" type=\"boolean\">");
        pw.println(" <prompt>");
        if (includeIndex == 0) {
            pw.println("<audio src=\"audio/${GW_RECORDED_VOICE}/the.wav\"/>");
            pw.println("<audio src=\"audio/${GW_RECORDED_VOICE}/first.wav\"/>");
        }
        else {
            pw.println("<audio src=\"audio/${GW_RECORDED_VOICE}/the.wav\"/>");
            pw.println("<audio src=\"audio/${GW_RECORDED_VOICE}/next.wav\"/>");
        }
        pw.println("<audio src=\"audio/${GW_RECORDED_VOICE}/
                            attached_filename_is.wav\"/>");
        try {
            pw.println(include.getFileName());
        }
        catch (MessagingException e) {
        }
        pw.println("<audio src=\"audio/${GW_RECORDED_VOICE}/
                        do_u_want_to_hear_it.wav\"/>");
        pw.println("</prompt>");
        pw.println("<filled>");
        pw.println(" <if cond=\"!wantReadFile\">");
        pw.println(" <assign name=\"readFile\" expr=\"'skip'\"/>");
        pw.println(" </if>");
        pw.println("</filled>");
        pw.println("</field>");

        try {
            if (EmailMessageReader.isText(include)) {
                String includeText = (String) include.getContent();
                String[] incTexts = EmailMessageReader.breakup(includeText);
                if (includeText != null) {
                    pw.println("<field name=\"readFile\">");
                    pw.println(" <prompt>");
                    for (int i = 0; i < incTexts.length; i++) {
                        pw.println("<block>");
                        pw.println(incTexts[i]);
                        pw.println("</block>");
                    }
                    pw.println(" </prompt>");
                    pw.println(" <dtmf>#</dtmf>");
                    pw.println(" <noinput>");
                    pw.println(" <assign name=\"readFile\" expr=\"'done'\"/>");
                    pw.println(" </noinput>");
                    pw.println("</field>");
                }
            }
            else if (EmailMessageReader.isWave(include)) {
                pw.println("<block name=\"readFile\">");
                pw.println("<submit next=\"readEmailWave\"
                               namelist=\"index includeidx\"/>");
                pw.println("</block>");
            }
        }
        catch (MessagingException e) {
        }

        pw.println("<block>");
        pw.println(" <assign name=\"includeidx\" expr=\"includeidx + 1\"/>");
        pw.println(" <submit next=\"email_inc\"
                         namelist=\"index includeidx\"/>");
        pw.println("</block>");
    }
    else {
        pw.println("<block>");
        pw.println(" <submit next=\"email_cnt_end\" namelist=\"index\"/>");
        pw.println("</block>");
    }

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