readme

this gives details of the network programming

This directory contains a CGI example program that handles multiple forms,
and keeps state information in hidden fields. The program can respond in
a number of different ways, depending on the query:

	no query: send back an initial form (login form)
	a login request: send back a pizza order form
	an order request: send back a receipt for pizza ordered.

The program determines which kind of request is made by looking for
a field named "formname" which can have the values:

	"order" : means this is an order request
	"login" : means this is a login request

If no field named "formname" is found the program assumes the user wants
to log in, so it sends back the login form.


Much of the HTML that is generated by the CGI program is read from files.
This makes it possible to change the look of the site without reompiling.
Some of the HTML is generated by the program itself...

Files;

logo - the Netprog Pizza logo that shows up on the top of all pages.
lpizza.gif, rpizza.gif: some graphics
loginform.tmpl - the HTML form a user uses to log in to the pizza server.
orderform.tmpl - most of the HTMLform for ordering a pizza.
baduser, nicetry - HTML error messages.

passwords: a file that contains name and password for all the customers.

np_pizza.c: C source for the CGI program.
cgilib.[ch]: CGI support routines.

To try out this CGI program - point your browser to np_pizza.cgi (the
executable) with no query string.