MailAccessor.java Source code

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Here is the source code for MailAccessor.java

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import java.io.IOException;
import java.io.PrintWriter;
import java.util.Properties;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.sun.corba.se.impl.protocol.giopmsgheaders.Message;

public class MailAccessor extends HttpServlet {

    private final static String DEFAULT_SERVER = "mail.attbi.com";

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {

        response.setContentType("text/html");
        java.io.PrintWriter out = response.getWriter();
        out.println("<html><head><title>Email Reader</title></head><body>");

        handleMessages(request, out);

        out.println("</body></html>");
        out.close();
    } //doGet

    private void handleMessages(HttpServletRequest request, PrintWriter out) throws IOException, ServletException {

        HttpSession httpSession = request.getSession();
        String user = (String) httpSession.getAttribute("user");
        String password = (String) httpSession.getAttribute("pass");
        String popAddr = (String) httpSession.getAttribute("pop");

        Store popStore = null;
        Folder folder = null;

        if (!check(popAddr))
            popAddr = MailAccessor.DEFAULT_SERVER;

        try {

            if ((!check(user)) || (!check(password)))
                throw new ServletException("A valid username and password is required to check email.");

            Properties properties = System.getProperties();

            Session session = Session.getDefaultInstance(properties);

            popStore = session.getStore("pop3");

            popStore.connect(popAddr, user, password);

            folder = popStore.getFolder("INBOX");

            if (!folder.exists())
                throw new ServletException("An 'INBOX' folder does not exist for the user.");

            folder.open(Folder.READ_ONLY);

            Message[] messages = folder.getMessages();
            int msgLen = messages.length;

            if (msgLen == 0)
                out.println("<h2>The INBOX folder does not yet contain any email messages.</h2>");

            for (int i = 0; i < msgLen; i++) {
                displayMessage(messages[i], out);
                out.println("<br /><br />");
            }

        } catch (Exception exc) {

            out.println("<h2>Sorry, an error occurred while accessing the email messages.</h2>");
            out.println(exc.toString());

        } finally {
            try {
                if (folder != null)
                    folder.close(false);

                if (popStore != null)
                    popStore.close();
            } catch (Exception e) {
            }
        }
    }//printMessages

    private void displayMessage(Message msg, PrintWriter out) throws MessagingException, IOException {

        if (msg != null && msg.getContent() instanceof String) {

            if (msg.getFrom()[0] instanceof InternetAddress) {
                out.println(
                        "Message received from: " + ((InternetAddress) msg.getFrom()[0]).getAddress() + "<br />");
            }

            out.println("Message content type: " + msg.getContentType() + "<br />");
            out.println("Message body content: " + (String) msg.getContent());
        } else {

            out.println("<h2>The received email message was not of a text content type.</h2>");

        }

    }//displayMessage

    private boolean check(String value) {

        if (value == null || value.equals(""))
            return false;

        return true;
    }
}