How to process and send json in pure python or bottle?

Question

Python

Java Scipt sending a request:
var xhr = new XMLHttpRequest();
xhr.open('GET', ' 127.0.0.1:8080 ');
xhr.send(JSON.stringify({a:1, b:2));
alert( xhr.responseText )

Please tell me how to get json in python, process it and return server status(200) and json object back to javascript.

My python code:
import http.server
http.server.test()

outputs to console:
127.0.0.1 - - [28/Feb/2018 00:28:55] "GET / HTTP/1.1" 200
without json and returns nothing
Thanks in advance!

Answer 1

https://httpbin.org/ here test if anything be the
first to get the server to return at least something, not necessarily json