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CGIparse
So you know C++, you know Internet programming...but you don't know how to
use this library? This section explains the individual elements required
to utilize the CGIparse class.
First, the class is intended to be executed by a browser -- after all
that is what CGI is all about anyways. In order for it to be executed by a browser,
you should start coding a form. In Figure (1) for example, is a very simple HTML form for
a username and password.
| Fig. 1 - Sample HTML Form |
<html>
<form method="post" action="/bin/CGIparse.exe">
<input type="text" name="FirstName">
<input type="text" name="LastName">
<input type="submit">
</form>
</html>
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The form needs to be processed by a CGI program on the server. In the case
of the form above, the program is CGIparse.exe and it is located
in the a directory called "cgi-bin". The directory where the CGIprogram will exist
must have execute permissions. Figure (2) contains some sample C++ code
utilizing the CGIparse library to simply dump the values submitted through
the form.
| Fig. 2 - Sample C++ code |
#include "CGIparse.h"
int main()
{
//initialize the CGIparse object
CGIparse p;
//the object p contains all the values submitted,
//dump them to the screen. Note: mimeType is automatically
//sent as text/html.
p.formDump();
return 0;
}
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Figure (3) is yet a more detailed example on how security may be granted or denied
with the simple password form above.
| Fig. 3 - More detailed example |
#include <string.h>
#include "CGIparse.h"
const char* PASSWORD = "opensesame";
int main()
{
//initialize the CGIparse object
CGIparse p;
//the object p contains all the values submitted,
char* name = p.valueOf("name");
char* password = p.valueOf("password");
CGIparse.printMime(); //send the default mime of text/html
if ( strcmp(password,PASSWORD) == 0 )
{
//grant access here
cout << "Congratulations " << name;
cout << "! You have access!" << endl;
}
else
{
//deny access here
cout << "Sorry, <b>" << password;
cout << "</b> is not valid." << endl;
}
return 0;
}
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