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f1-stream: fix frontend routing with catch-all handler for SvelteKit SPA

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Viktor Barzin 2026-02-24 00:18:28 +00:00
parent c9b187ed65
commit 540fffdf3f
1 changed files with 24 additions and 2 deletions
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26
stacks/f1-stream/files/backend/main.py
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@ -411,9 +411,31 @@ async def relay_endpoint(
# --- Frontend Static Files ---
# Mount the SvelteKit static build AFTER all API routes so API endpoints take priority.
_frontend_dir = os.path.join(os.path.dirname(__file__), "..", "frontend", "build")
# SvelteKit adapter-static with ssr=false produces {page}.html files and a fallback index.html.
# Starlette StaticFiles(html=True) only checks {path}/index.html, not {path}.html.
# We use a catch-all route to handle both patterns and the SPA fallback.
_frontend_dir = os.path.realpath(os.path.join(os.path.dirname(__file__), "..", "frontend", "build"))
if os.path.exists(_frontend_dir):
app.mount("/", StaticFiles(directory=_frontend_dir, html=True), name="frontend")
from starlette.responses import FileResponse, HTMLResponse
_fallback_path = os.path.join(_frontend_dir, "index.html")
@app.get("/{path:path}")
async def serve_frontend(path: str):
"""Serve SvelteKit frontend files with SPA fallback."""
for candidate in [
os.path.join(_frontend_dir, path),
os.path.join(_frontend_dir, f"{path}.html"),
os.path.join(_frontend_dir, path, "index.html"),
]:
real = os.path.realpath(candidate)
if real.startswith(_frontend_dir) and os.path.isfile(real):
return FileResponse(real)
# SPA fallback for client-side routing
if os.path.isfile(_fallback_path):
return FileResponse(_fallback_path)
return Response(content="Not Found", status_code=404)
logger.info("Serving frontend from %s", _frontend_dir)
else:
# Fallback root when no frontend build exists