Simple Python directory lister

lister.py

#!/usr/bin/env python3
from http.server import HTTPServer, BaseHTTPRequestHandler
import os
import json
 
class StaticServer(BaseHTTPRequestHandler):
 
    def do_GET(self):
        files = os.listdir(".")
        self.send_response(200)
        self.send_header('Content-type', 'application/javascript')
        self.end_headers()
        self.wfile.write(json.dumps(files, indent=4 ).encode())
 
def run(server_class=HTTPServer, handler_class=StaticServer, port=8000):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print('Starting httpd on port {}'.format(port))
    httpd.serve_forever()
 
run()