Often when you write a server application things do not go as expected. I've found that it's a big help to have a stupid echo server which just prints the request. It doesn't need to respond with anything specific, just output headers and the request.
In this repository you'll find a simple echo server implemented in common languages.
Some servers are implemented using a web server (node.js for example) while some use a simple server socket (ruby for example).
Some output just the HTTP/1.0 200 OK while some add some headers, it depends on the
language/framework.
The goal is to have no dependencies beside the bare minimum and that all servers can be started using ./server.<ext> [port=8080] [host=127.0.0.1] with the host and port being optional.
Of course this isn't possible in all languages (compiled languages).
Add your favorite language and make a pull request!
This is project is licensed under the MIT License.