import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* OrderServlet implements order processing for Acme Widgets.
* This dummy version just generates a thank-you notice.
*
* @author Ian Darwin, ian@darwinsys.com, November, 1997
*/
public class OrderServlet extends HttpServlet {
/** doPost() processes one POST request.
* Assuming weve been installed correctly, this can only
* come from the order page, so we blindly respond,
* without much validation of the order :-)
*/
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
String cardType = req.getParameter("cardType");
String cardNumber = req.getParameter("cardNumber");
String expMonth = req.getParameter("expMonth");
String expYear = req.getParameter("expYear");
// Simple validation.
if (cardType == null || cardNumber == null ||
cardNumber.length() == 0 ||
expMonth == null || expYear == null) {
make_reply(false, out, "Acme Widgets: Thanks for trying...",
"Error!",
"<P>We need a credit card type <B>and</B> a " +
"valid credit card number, as well as the expiration "+
"month and year. Please click your " +
"browsers <I>Back</I> button and try again.\n" +
"<P>Again, thank you for your order.");
return;
}
// Code here to phone the bank and validate the card.
// Now make a nice thankyou to the user
make_reply(true, out, "Acme Widgets: Thank you for your order",
"Thank you for your credit card order",
"We will bill it to your " + cardType + " credit card" +
" which expires " + expMonth + "/" + expYear +
"<P>Wile E. Coyote will process your order " +
"as soon as he returns from his latest trip " +
"to the bottom of the Grand Canyon.</P>");
return;
}
/** Common code to generate a reply */
void make_reply(boolean cardIsApproved, PrintWriter os,
String title, String h1, String txt) {
// There would be code here to log the approve/deny status
// Now make up the reply to the user.
os.print("<HTML><HEAD>");
os.print("<TITLE>");
os.print(title);
os.print("</TITLE>");
os.print("<BODY><H1>");
os.print(h1);
os.print("</H1>");
os.print(txt);
os.print("</BODY></HTML>");
}
/** Some Servlet engines use this to report on the servlet */
public String getServletInfo() {
return "Acme Widgets Credit Card Validation";
}
}
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