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

import com.oreilly.servlet.ParameterParser;
import com.oreilly.servlet.ServletUtils;

import sun.net.smtp.SmtpClient;

public class MailServlet extends HttpServlet {

  static final String FROM = "MailServlet";
  static final String TO = "feedback-folks@attentive-company.com";

  public void doGet(HttpServletRequest req, HttpServletResponse res)
                               throws ServletException, IOException {
    res.setContentType("text/plain");
    PrintWriter out = res.getWriter();

    ParameterParser parser = new ParameterParser(req);
    String from = parser.getStringParameter("from", FROM);
    String to = parser.getStringParameter("to", TO);

    try {
      SmtpClient smtp = new SmtpClient();  // assume localhost
      smtp.from(from);
      smtp.to(to);
      PrintStream msg = smtp.startMessage();

      msg.println("To: " + to);  // so mailers will display the To: address
      msg.println("Subject: Customer feedback");
      msg.println();

      Enumeration enum = req.getParameterNames();
      while (enum.hasMoreElements()) {
        String name = (String)enum.nextElement();
        if (name.equals("to") || name.equals("from")) continue;  // Skip to/from
        String value = parser.getStringParameter(name, null);
        msg.println(name + " = " + value);
      }

      msg.println();
      msg.println("---");
      msg.println("Sent by " + HttpUtils.getRequestURL(req));

      smtp.closeServer();

      out.println("Thanks for the submission...");
    }
    catch (IOException e) {
      out.println("There was a problem handling the submission...");
      getServletContext().log(e, "There was a problem sending email");
    }
  }
}