Python 3: serve the current directory as HTTP while setting CORS headers for XHR debugging

simple_cors_server.py

#!/usr/bin/env python3
# encoding: utf-8
"""Use instead of `python3 -m http.server` when you need CORS"""

from http.server import HTTPServer, SimpleHTTPRequestHandler


class CORSRequestHandler(SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header('Access-Control-Allow-Origin', '*')
        self.send_header('Access-Control-Allow-Methods', 'GET')
        self.send_header('Cache-Control', 'no-store, no-cache, must-revalidate')
        return super(CORSRequestHandler, self).end_headers()


httpd = HTTPServer(('localhost', 8003), CORSRequestHandler)
httpd.serve_forever()

Thanks!

Saved me from experiencing several more hours of pain. Thank you!

@FreyGeospatial: glad it helped — I’ve saved myself at least once by finding this in a search result, too 😀

it works very well, but if someone needs to pass the port number dynamically (like the original http.server), change line 16 with.

import sys
PORT = sys.argv[1]
httpd = HTTPServer(('localhost', PORT), CORSRequestHandler)

Cool!

@acdha
Saved my day, thanks!

Hey guys,

I am hosting a directory in my local system where I have some files I want to access using another domain and port in my local system. In this process, I am getting a CORS error. I am hosting the directory with some files using the node command "HTTP-server -p 8000" from the terminal. I am getting a CORS error when accessing these files from something like the "0.0.0.3000" domain. Can anyone help me host these directories with CORS access for 0.0.0.3000? I will be highly grateful for your help.
(I specifically want help hosting the directory with CORS access, not an HTML page. Examples of hosting an HTML page with CORS access are well documented on the web. Also, as a beginner web developer, I may be asking a dumb question, please pardon me.)

Thank You,
Prashant Upadhyay
PhD

Great script, thank you!

so nice, thank you ^^b