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Delphi 2 on CGI Bin - Win NT 4.0 IIS

anakecil
anakecil asked
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Last Modified: 2010-04-06
Is there anyway I can create CGI program which run on
NT 4.0 server uses microsoft IIS only without any
additional delphi component and without additional Win CGI interface like O'reilyes ??
I'm using Delphi 2
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Commented:
anakecil,

I will assume that you know the basic theory behind CGI - the server receiving a REQUEST, invoking the CGI program with the request, the CGI program producing a RESPONSE to the standard output stream, etc.

Once you understand this basic model, writing plain CGI program is easy. Here is a minimal CGI "Hello World" CGI application :

program Project1;

begin
    Writeln('HTTP/1.0 200 OK');
    Writeln('Content-Type: text/html');
    Writeln('');
    Writeln('Hello World');
end.

Put this code in a project file (project1.dpr), compile it, and place project1.exe in the InetPub\Scripts directory (or any other directory which has the Execute attribute defined for it in IIS).

Invoke it with "http://127.0.0.1/scripts/project1.exe"

The next step depends on what you need the CGI program to do. However, most CGI programs need to acess the "Query String" - this is the part the follows the question mark in the URL, and which is usually generated when you click the "Submit" button in a HTML form. Here is an example of a URL with a Query String :

http://127.0.0.1/scripts/project1.exe?Name=Joe&Age=21

This Query String contains 2 fields, Name and Age. To access the Query String, retrieve the value of the QUERY_STRING environment variable :

SetLength(QS, 1024);
SetLength(QS, GetEnvironmentVariable('QUERY_STRING', PChar(QS), 1024));

This is about all you need to get started -

Yaniv

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Commented:
I already bought several books about Delphi CGI programming, but I really don't know why on those books, they can't answer what I really want to know about CGI, they event told me about the INI files and etc. but all their program won't run. But here your answer is excellent !!! you deserve a high five since your answer very clean and crisp, direct to what I really want to know. Thxx for your answer YGOLAN !!! You and Expert Exchange is really the best place I ever found to find an answer !!!! I can now start to write my own CGI programming thxx a lot !!! keep a good answer like this, You should be the best Delphi programmer around, I really appreciate your answer, since I already found the right path.Byeee for now c ya soon- AnaKecil -
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