Python script to run an HTTP server that only accepts connections from localhost. Primarily intended as a workaround for cross-origin requests preventing you from loading local assets in your local JS scripts.

http_server.py

import argparse
import os
import os.path
import sys

parser = argparse.ArgumentParser()
parser.add_argument("-p", "--port", type=int, help="Port to open for HTTP connections", default=80)
parser.add_argument("-d", "--dir", help="Root directory to serve", default=".")
args = parser.parse_args()

if sys.version_info.major == 3:
    import http.server
    import socketserver
    server_base_class = socketserver.TCPServer
    class LocalTCPServer(socketserver.TCPServer):
        "Only accepts requests from 127.0.0.1"
        def verify_request(self, request, client_address):
            return (client_address[0] == '127.0.0.1')
    handler = http.server.SimpleHTTPRequestHandler
elif sys.version_info.major == 2:
    import SimpleHTTPServer
    import SocketServer
    class LocalTCPServer(SocketServer.TCPServer):
        "Only accepts requests from 127.0.0.1"
        def verify_request(self, request, client_address):
            return (client_address[0] == '127.0.0.1')
    handler = SimpleHTTPServer.SimpleHTTPRequestHandler

root_dir = os.path.abspath(args.dir)
os.chdir(root_dir)
httpd = LocalTCPServer(("",args.port), handler)
if args.port == 80:
    server_string = "localhost"
else:
    server_string = "localhost:%d" % args.port
print("Serving %s at http://%s\n" % (root_dir, server_string))
httpd.serve_forever()

# Put the following into http_server.bat in the same directory,
# and put both files in your %PATH% somewhere.
'''
@echo off
python %~dp0\http_server.py %*
'''