Gateway Tutorial: User Interface | Email To Phone Setup Servlet

This is the Servlet class to for the EmailToPhone application setup page. The majority of the code is generate the HTML content for the above page. The code worth notice is the following:   

Properties props = new Properties();
    String appdir = getServletContext().getRealPath("..");
    File propspath = new File(new File(appdir), "conf/emailsetup.conf");
    if (propspath.exists()) {
        FileInputStream propsFile = new FileInputStream(propspath);
        props.load(propsFile);
        propsFile.close();
    }

All the setup data are saved in the eamilsetup.conf file under the conf directory. The conf file uses the Java Properties file format. If the Save button is pressed, the Servlet class saves the data to the conf file.

    String act = request.getParameter("action");
    if (act != null && act.equals("save")) {
	...
	FileOutputStream fos = new FileOutputStream(propspath);
        props.save(fos, "emailtophone setup");
    }

Source Code

package vx.apps.email;

import java.io.*;
import javax.servlet.http.*;
import java.util.Properties;

import vx.util.Base64;


public class EmailSetupServlet extends HttpServlet
{
  public void service(HttpServletRequest request,
                      HttpServletResponse response)
    throws IOException
  {
    Properties props = new Properties();
    String appdir = getServletContext().getRealPath("..");
    File propspath = new File(new File(appdir), "conf/emailsetup.conf");
    if (propspath.exists()) {
        FileInputStream propsFile = new FileInputStream(propspath);
        props.load(propsFile);
        propsFile.close();
    }

    String msg = "";

    String act = request.getParameter("action");
    if (act != null && act.equals("save")) {
        String newpassword = request.getParameter("password");
        if (newpassword != null && newpassword.length() > 0) {
            String passwd = Base64.encode(newpassword);
            props.setProperty("readpassword", passwd);
        }
        else {
            String encpasswd = request.getParameter("encpassword");
            if (encpasswd != null && encpasswd.length() > 0)
                props.setProperty("readpassword", encpasswd);
        }

        String readproto = request.getParameter("readproto");
        if (readproto != null)
            readproto = readproto.toLowerCase();
        props.setProperty("readproto", readproto);
        props.setProperty("readuser", request.getParameter("readuser"));
        props.setProperty("readhost", request.getParameter("readhost"));
        props.setProperty("readport", request.getParameter("readport"));
        props.setProperty("readusessl", request.getParameter("readusessl"));
        props.setProperty("sendhost", request.getParameter("sendhost"));
        props.setProperty("sendport", request.getParameter("sendport"));
        props.setProperty("senduseauth", request.getParameter("senduseauth"));
        props.setProperty("sendusessl", request.getParameter("sendusessl"));
        props.setProperty("aphone", request.getParameter("aphone"));
        props.setProperty("polltime", request.getParameter("polltime"));
        props.setProperty("sockshost", request.getParameter("sockshost"));
        props.setProperty("socksport", request.getParameter("socksport"));
        props.setProperty("socksnoproxyhosts",
                           request.getParameter("socksnoproxyhosts"));
        props.setProperty("alertfrom", request.getParameter("alertfrom"));
        props.setProperty("alertto", request.getParameter("alertto"));

        // save
        FileOutputStream fos = new FileOutputStream(propspath);
        props.save(fos, "emailtophone setup");
        msg = "Setting saved. Please restart Voicent Gateway.";
    }

    String readproto = props.getProperty("readproto");
    if (readproto == null)
        readproto = "pop3";
    else {
        readproto = readproto.toLowerCase();
        if (! readproto.equals("imap"))
            readproto = "pop3";
    }
    String readuser = props.getProperty("readuser");
    if (readuser == null)
        readuser = "";
    String encpasswd = props.getProperty("readpassword");
    String readhost = props.getProperty("readhost");
    if (readhost == null)
        readhost = "";
    String readport = props.getProperty("readport");
    if (readport == null)
        readport = "110";
    String readusessl = props.getProperty("readusessl");
    String sendhost = props.getProperty("sendhost");
    if (sendhost == null)
        sendhost = "";
    String sendport = props.getProperty("sendport");
    if (sendport == null)
        sendport = "25";
    String senduseauth = props.getProperty("senduseauth");
    String sendusessl = props.getProperty("sendusessl");
    String aphone = props.getProperty("aphone");
    if (aphone == null)
        aphone = "";
    String polltime = props.getProperty("polltime");
    if (polltime == null)
        polltime = "";
    String alertfrom = props.getProperty("alertfrom");
    if (alertfrom == null)
        alertfrom = "";
    String alertto = props.getProperty("alertto");
    if (alertto == null)
        alertto = "";
    String sockshost = props.getProperty("sockshost");
    if (sockshost == null)
        sockshost = "";
    String socksport = props.getProperty("socksport");
    if (socksport == null)
        socksport = "";
    String socksnoproxyhosts = props.getProperty("socksnoproxyhosts");
    if (socksnoproxyhosts == null)
        socksnoproxyhosts = "";

    PrintWriter w = response.getWriter();

    w.println("<html>");
    w.println("<head>");
    w.println("<meta http-equiv=\"Content-Language\" content=\"en-us\">");
    w.println("<meta http-equiv=\"Content-Type\" content=\"text/html;
                                            charset=windows-1252\">");
    w.println("<title>EmailToPhone - Setup</title>");
    w.println("</head>");

    w.println("<body>");

    w.println("<p>");
    w.println("<font color=red>" + msg + "</font>");

    w.println("<h3 align=\"center\"><u><font color=\"#FF0000\">
               Email to Phone - Setup</font></u></h3>");
    w.println("<form action=\"emailsetup\" method=\"post\">");
    w.println("<input type=hidden name=encpassword value=\""
               + encpasswd + "\">");
    w.println("<table border=\"0\" cellpadding=\"0\" cellspacing=\"1\"
               bordercolor=\"#111111\" width=\"80%\" bgcolor=\"#000080\">");
    w.println(" <tr>");
    w.println(" <td>");
    w.println(" <table border=\"1\" cellpadding=\"0\" cellspacing=\"8\"
                bordercolor=\"#111111\" width=\"100%\" bgcolor=\"#FFFFD7\"
                style=\"border-collapse: collapse\">");
    w.println(" <tr>");
    w.println(" <td width=\"100%\" height=\"22\" bgcolor=\"#808000\"
                colspan=\"2\">");
    w.println(" <font color=\"#FFFFFF\">Setup Email Account</font></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
                Email Address</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"readuser\" value=\""
               + readuser + "\" size=\"36\" tabindex=\"1\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Password</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"password\" name=\"password\" size=\"24\"
               tabindex=\"2\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Incoming mail server</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"readhost\" value=\""
               + readhost + "\" size=\"36\" tabindex=\"3\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Incoming mail protocol (POP3)</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"readproto\" value=\""
               + readproto + "\" size=\"36\" tabindex=\"3\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Incoming mail port (default 110)</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"readport\" value=\""
               + readport + "\" size=\"10\" tabindex=\"4\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Incoming Use SSL</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.print(" <input type=\"checkbox\" name=\"readusessl\" value=\"1\"");
    if ("1".equals(readusessl))
        w.print(" checked");
    w.println("></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Outgoing mail server (SMTP)</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"sendhost\" value=\""
               + sendhost + "\" size=\"36\" tabindex=\"5\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               SMTP port (default 25)</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"sendport\" value=\""
               + sendport + "\" size=\"10\" tabindex=\"6\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Send Use Authentication</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.print(" <input type=\"checkbox\" name=\"senduseauth\" value=\"1\"");
    if ("1".equals(senduseauth))
        w.print(" checked");
    w.println("></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Send Use SSL</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.print(" <input type=\"checkbox\" name=\"sendusessl\" value=\"1\"");
    if ("1".equals(sendusessl))
        w.print(" checked");
    w.println("></td>");
    w.println(" </tr>");
    w.println(" </table>");
    w.println(" </td>");
    w.println(" </tr>");
    w.println("</table>");
    w.println("<p></p>");
    w.println("<table border=\"0\" cellpadding=\"0\" cellspacing=\"1\"
               bordercolor=\"#111111\" width=\"80%\" bgcolor=\"#000080\">");
    w.println(" <tr>");
    w.println(" <td>");
    w.println(" <table border=\"1\" cellpadding=\"0\" cellspacing=\"8\"
               bordercolor=\"#111111\" width=\"100%\" bgcolor=\"#FFFFD7\"
               style=\"border-collapse: collapse\">");
    w.println(" <tr>");
    w.println(" <td width=\"100%\" height=\"22\"
               bgcolor=\"#808000\" colspan=\"2\">");
    w.println(" <font color=\"#FFFFFF\">Setup email alert over
               the phone (not available in shareware version)");
    w.println(" </font></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Alert Phone Number</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"aphone\" value=\""
               + aphone + "\" size=\"36\" tabindex=\"10\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Check email every</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"polltime\" value=\""
             + polltime + "\" size=\"3\" tabindex=\"11\"> Minutes</td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Alert me if email is sent FROM<p>(One email address per line)</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <textarea rows=\"8\" name=\"alertfrom\" cols=\"36\">"
               + alertfrom + "</textarea></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               Alert me if email is sent TO<p>(One email address per line)</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <textarea rows=\"8\" name=\"alertto\" cols=\"36\">"
               + alertto + "</textarea></td>");
    w.println(" </tr>");
    w.println(" </table>");
    w.println(" </td>");
    w.println(" </tr>");
    w.println("</table>");
    w.println("<br>");
    w.println("<table border=\"0\" cellpadding=\"0\" cellspacing=\"1\"
               bordercolor=\"#111111\" width=\"80%\" bgcolor=\"#000080\">");
    w.println(" <tr>");
    w.println(" <td>");
    w.println(" <table border=\"1\" cellpadding=\"0\" cellspacing=\"8\"
               bordercolor=\"#111111\" width=\"100%\" bgcolor=\"#FFFFD7\"
               style=\"border-collapse: collapse\">");
    w.println(" <tr>");
    w.println(" <td width=\"100%\" height=\"22\" bgcolor=\"#808000\" colspan=\"2\">");
    w.println(" <font color=\"#FFFFFF\">Other Options (leave it blank
               if you don't understand what they are)</font></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               SocksProxyHost</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"sockshost\" value=\""
               + sockshost + "\" size=\"24\" tabindex=\"12\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               SocksProxyPort</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"socksport\" value=\""
               + socksport + "\" size=\"10\" tabindex=\"13\"></td>");
    w.println(" </tr>");
    w.println(" <tr>");
    w.println(" <td width=\"44%\" height=\"22\" bgcolor=\"#FFFFD7\">
               SocksNoProxyHosts</td>");
    w.println(" <td width=\"56%\" height=\"22\" bgcolor=\"#FFFFD7\">");
    w.println(" <input type=\"text\" name=\"socksnoproxyhosts\" value=\""
               + socksnoproxyhosts + "\" size=\"36\" tabindex=\"14\"></td>");
    w.println(" </tr>");
    w.println(" </table>");
    w.println(" </td>");
    w.println(" </tr>");
    w.println("</table>");
    w.println("<br>");
    w.println("<input type=hidden name=action value=\"save\">");
    w.println("<input type=submit name=submit value=\"Save Settings\">");
    w.println("</form>");

    w.println("<p><a href=\"emailtophone\">Go back</a></p>");

    w.println("</body>");
    w.println("</html>");
  }
}