#!/usr/bin/env python3
"""Dev server for bin/web with caching disabled.

The browser aggressively caches .wasm/.js, and a plain reload (Ctrl+R) will
happily serve a stale module while the page *looks* freshly loaded — which makes
"did my rebuild take effect?" impossible to answer and sends you chasing bugs
that were already fixed. Everything here is served no-store so a rebuild is
always what you get, regardless of how the page is reloaded.
"""
import http.server, socketserver, sys

PORT = int(sys.argv[1]) if len(sys.argv) > 1 else 8080

class NoCache(http.server.SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0")
        self.send_header("Pragma", "no-cache")
        self.send_header("Expires", "0")
        super().end_headers()

    def log_message(self, fmt, *args):
        pass  # quiet; the build script is the interesting output

socketserver.TCPServer.allow_reuse_address = True
with socketserver.TCPServer(("", PORT), NoCache) as httpd:
    print(f"serving bin/web on http://localhost:{PORT}/rspektrum.html (no-store)")
    httpd.serve_forever()