#!/usr/bin/env python3 """ What `lazy()` shows when the module it asks for answers 404. The shape found live: a tab opened before a hub deploy asks for its not-yet- loaded modules under the previous `/a//` prefix, which the new hub no longer serves. Every lazily loaded view — Search, Videos, Music, Photos, the video player — sat on its spinner for good, with an empty console. This renders the shipped `lazy.js` against a module that does not exist, and one that does, and reads back what is on the page. lazy_failure_probe.py """ import http.server import json import socketserver import subprocess import sys import tempfile import threading import time from pathlib import Path STATIC = Path(__file__).resolve().parents[2] / "src" / "meshbay_hub" / "static" PORT = 8763 RECORDS = [] socketserver.TCPServer.allow_reuse_address = True FRAME = r"""

""" PAGE = r""" """ class H(http.server.BaseHTTPRequestHandler): def log_message(self, *a): pass def do_POST(self): length = int(self.headers.get("Content-Length") or 0) if self.path == "/log": RECORDS.append(json.loads(self.rfile.read(length).decode())) else: self.rfile.read(length) self.send_response(204) self.end_headers() def _send(self, body: bytes, ctype: str) -> None: self.send_response(200) self.send_header("Content-Type", ctype) self.send_header("Content-Length", str(len(body))) self.end_headers() self.wfile.write(body) def do_GET(self): path = self.path.split("?")[0] if path == "/": self._send(PAGE.encode(), "text/html; charset=utf-8") elif path == "/case": self._send(FRAME.encode(), "text/html; charset=utf-8") else: asset = (STATIC / path.lstrip("/")).resolve() if not str(asset).startswith(str(STATIC)) or not asset.is_file(): self.send_response(404) self.end_headers() return self._send(asset.read_bytes(), "text/css" if asset.suffix == ".css" else "text/javascript" if asset.suffix == ".js" else "application/octet-stream") def main() -> int: with socketserver.TCPServer(("127.0.0.1", PORT), H) as srv: threading.Thread(target=srv.serve_forever, daemon=True).start() with tempfile.TemporaryDirectory(ignore_cleanup_errors=True) as profile: proc = subprocess.Popen( ["google-chrome", "--headless=new", "--disable-gpu", "--no-sandbox", f"--user-data-dir={profile}", "--window-size=900,700", f"http://127.0.0.1:{PORT}/"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) deadline = time.time() + 60 while not RECORDS and time.time() < deadline: time.sleep(0.2) proc.terminate() proc.wait(timeout=20) if not RECORDS: print("the page never reported", file=sys.stderr) return 1 print(json.dumps(RECORDS[0])) return 0 if __name__ == "__main__": raise SystemExit(main())