Python http.server that sets Access-Control-Allow-Origin header.

server.py

import os
import sys
import http.server
import socketserver

PORT = 8000

class HTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header('Access-Control-Allow-Origin', '*')
        self.send_header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
        self.send_header('Access-Control-Allow-Headers', 'Content-Type')
        http.server.SimpleHTTPRequestHandler.end_headers(self)

    def do_OPTIONS(self):
        self.send_response(200)
        self.end_headers()

def server(port):
    httpd = socketserver.TCPServer(('', port), HTTPRequestHandler)
    return httpd

if __name__ == "__main__":
    port = PORT
    httpd = server(port)
    try:
        os.chdir('.')
        print("\nserving from data/ at localhost:" + str(port))
        httpd.serve_forever()
    except KeyboardInterrupt:
        print("\n...shutting down http server")
        httpd.shutdown()
        sys.exit()