A minimal HTTP server in python. It sends a JSON Hello World for GET requests, and echoes back JSON for POST requests.

python server.py 8009 Starting httpd on port 8009...

curl http://localhost:8009 {"received": "ok", "hello": "world"}

curl --data "{"this":"is a test"}" --header "Content-Type: application/json" http://localhost:8009 {"this": "is a test", "received": "ok"}

Adapted from this Gist, with the addition of code for reading the request body taken from this article.