Server side pascal - accepting input and producing output

[ajavdk]

Hello,

I have a pascal program that I would like to be able to run on a server. I was hoping there is a way of passing the pascal program some kind of input (even if it is just interpreted as a string), and then somehow 'returning' to the server an output (again, even if the output is just a string). Can someone point me towards resources regarding doing this? I'm not sure what to search in the forums.

-Alex

[Handoko]

I read @rvk posts and then I was able to understand how to write program for server and client to communicate, he explained it well. Maybe this is what you're looking for:
https://forum.lazarus.freepascal.org/index.php/topic,38622

[bee]

If what you meant is a web application then I suggest you to try WebCRT unit that I made to help Pascal newbies creating server side web applications (as CGI apps) using Free Pascal.

The WebCRT announcement is here: https://forum.lazarus.freepascal.org/index.php/topic,33946.msg221205.html#msg221205

The GitHub repository is here: https://github.com/pakLebah/webCRT

Happy coding!

[Leledumbo]

While other answers assume you want your Pascal program to run as a server by itself (which is perfectly possible), I assume you just want to call it from an existing web server application.

I was hoping there is a way of passing the pascal program some kind of input (even if it is just interpreted as a string)

http://wiki.lazarus.freepascal.org/Command_line_parameters_and_environment_variables
https://www.freepascal.org/docs-html/rtl/getopts/index.html

and then somehow 'returning' to the server an output (again, even if the output is just a string).

Depending on how the existing web server application executes your Pascal program's binary, there could be several ways. The better one is to use pipes, so your existing web application should read stdout (and/or stderr if you want) from your Pascal program. Otherwise any shared resource mechanism (files, sockets, even databases) is fine.

[mangakissa]

Look at the middleware tools like Mormot and TIOPF.

[sash]

My bet: you need console program launched with telnet/ssh (?)