#include <stdio.h>
#include <cgi.h>
int main(void)
{
// formvars is a structure type used to manage session and cgi
// linked lists. It have 'name' and 'value' properties.
formvars *sess_vars;
char *data;
cgi_init();
cgi_session_start();
cgi_process_form();
// The user is trying to unregister some variables?
if (cgi_param("action")) {
while ((data = cgi_param_multiple("unregister")))
cgi_session_unregister_var(data);
}
cgi_init_headers();
puts(""
"<html>"
"<head><title>LibCGI session example - variables</title>"
"</head>"
"<body>"
"");
cgi_include("session_ex1_desc.html");
puts(""
"<table width='70%' align='center'>"
"<tr>"
"<td>"
"");
if (!cgi_session_var_exists("logged")) {
puts(""
"<font face='arial, verdana' size='2'>You are not logged. To see this page contents, you"
"must be logged. Please <a href='login.cgi'>click here</a> to go to login page."
"</font>"
"");
}
else {
// show the registered session variables to user
// sess_list_start is a global variable that contains
// all session variables information, such name and value
sess_vars = sess_list_start;
puts("<form action='show_vars.cgi' method='post'>");
while (sess_vars) {
printf(""
"<font face='verdana, arial' size='2' color='#000000'>Variable: <b>%s</b></font>"
"<font face='verdana, arial' size='2' color='#000000'>Value: <b>%s</b></font> "
"<input type='checkbox' name='unregister' value='%s'>Unregister? <br>"
"", sess_vars->name, sess_vars->value, sess_vars->name);
sess_vars = sess_vars->next;
}
puts(""
"<br><br>"
"<input type='submit' name='action' value='Unregister selected'>"
"</form>"
"");
}
puts("</td></tr>");
cgi_include("topbar.htm");
puts(""
"</table>"
"</body>"
"</html>"
"");
cgi_end();
return 0;
}
