Starting a local test HTTP server for Godot compatible apps/games (includes CORS and SharedArrayBuffer)

server.py

import sys
import socketserver
from http.server import SimpleHTTPRequestHandler

class WasmHandler(SimpleHTTPRequestHandler):
    def end_headers(self):        
        # Include additional response headers to allow for use of the 
        # SharedArrayBuffer in Firefox.
        self.send_header("Cross-Origin-Opener-Policy", "same-origin")
        self.send_header("Cross-Origin-Embedder-Policy", "require-corp")
        SimpleHTTPRequestHandler.end_headers(self)

# Python 3.7.5 adds in the WebAssembly Media Type. If this is an older
# version, add in the Media Type.
if sys.version_info < (3, 7, 5):
    WasmHandler.extensions_map['.wasm'] = 'application/wasm'

if __name__ == '__main__':
    host = sys.argv[1] if len(sys.argv) > 2 else '0.0.0.0'
    port = int(sys.argv[len(sys.argv)-1]) if len(sys.argv) > 1 else 8000

    with socketserver.TCPServer(("", port), WasmHandler) as httpd:
        print("Listening on port {}. Press Ctrl+C to stop.".format(port))
        httpd.serve_forever()