http application library known ?

I am about to change some code in order to make it controllable by a web interface. I want to be able to get commands and values out of the http-stream/messages and send back results (ie. complete pages or just a few numbers to be embedded in the page etc.).
I got simple requests/replies so far and it does what i want but its no way clean nor is it standard conformant :)
Now my problem is that it would be nice if there would be a way to avoid re-implementing ALL this http stuff. I want to be able to deal with my data only and let the library do the standard things like fetching images and fixed html pages from files.

So i wondered if there is a library that can do something like this for linux ?

Or any good idea ? Chris

Here's one - I'm sure there are others...
man libcurl

Thanks a lot.
Their website (http://curl.haxx.se/devel.html) alone contains links (http://curl.haxx.se/libcurl/competitors.html) to many similar projects :)
I guess i can find something there ...

I had a closer look at libcurl today and it seems to me it is unable to serve content. It rather goes the other way round. It can construct http-commands and fetch content from a webserver for you.

Now i found pthrlib and will give this one a try. It was used to build webservers and basically that is what i want to do but i want to save the effort implementing the basics of it ;)

http://www.annexia.org/freeware/pthrlib/

Chris