fix for strava auth

bincio/serve/server.py

@@ -48,6 +48,7 @@ data_dir: Path | None = None
 site_dir: Path | None = None   # for post-write rebuild trigger
 strava_client_id: str = ""
 strava_client_secret: str = ""
+public_url: str = ""   # e.g. "https://yourdomain.com" — used for OAuth redirect URIs
 _db = None  # sqlite3.Connection, opened lazily
 
 
@@ -674,7 +675,10 @@ async def strava_auth_url(request: Request, bincio_session: Optional[str] = Cook
         raise HTTPException(400, "Strava client ID not configured on this server")
     state = secrets.token_urlsafe(16)
     _strava_oauth_states.add(state)
-    redirect_uri = str(request.url_for("strava_callback"))
+    if public_url:
+        redirect_uri = public_url.rstrip("/") + "/api/strava/callback"
+    else:
+        redirect_uri = str(request.url_for("strava_callback"))
     from bincio.extract.strava_api import auth_url
     return JSONResponse({"url": auth_url(strava_client_id, redirect_uri, state=state)})
 
@@ -687,7 +691,7 @@ async def strava_callback(
     state: str = "",
     bincio_session: Optional[str] = Cookie(default=None),
 ) -> RedirectResponse:
-    site_origin = str(request.base_url).rstrip("/")
+    site_origin = public_url.rstrip("/") if public_url else str(request.base_url).rstrip("/")
     if error or not code:
         return RedirectResponse(f"{site_origin}/?strava=error")
     if state not in _strava_oauth_states: