#!/usr/bin/env python3
"""Minimal HTTP server that serves POC files with COOP/COEP headers
(required for SharedArrayBuffer / cross-origin isolation)."""
import http.server
import os
import socketserver

PORT = 18080
ROOT = os.path.dirname(os.path.abspath(__file__))


class Handler(http.server.SimpleHTTPRequestHandler):
    def __init__(self, *a, **kw):
        super().__init__(*a, directory=ROOT, **kw)

    def end_headers(self):
        self.send_header("Cross-Origin-Opener-Policy", "same-origin")
        self.send_header("Cross-Origin-Embedder-Policy", "require-corp")
        self.send_header("Cache-Control", "no-store")
        super().end_headers()


if __name__ == "__main__":
    socketserver.TCPServer.allow_reuse_address = True
    with socketserver.TCPServer(("127.0.0.1", PORT), Handler) as httpd:
        print(f"serving on http://127.0.0.1:{PORT}/")
        httpd.serve_forever()