Experimental dynamic manifest

app/frontend_static.py

@@ -1,13 +1,27 @@
 import logging
 from pathlib import Path
 
-from fastapi import FastAPI, HTTPException
-from fastapi.responses import FileResponse
+from fastapi import FastAPI, HTTPException, Request
+from fastapi.responses import FileResponse, JSONResponse
 from fastapi.staticfiles import StaticFiles
 
 logger = logging.getLogger(__name__)
 
 
+def _resolve_request_origin(request: Request) -> str:
+    """Resolve the external origin, honoring common reverse-proxy headers."""
+    forwarded_proto = request.headers.get("x-forwarded-proto")
+    forwarded_host = request.headers.get("x-forwarded-host")
+
+    if forwarded_proto and forwarded_host:
+        proto = forwarded_proto.split(",")[0].strip()
+        host = forwarded_host.split(",")[0].strip()
+        if proto and host:
+            return f"{proto}://{host}"
+
+    return str(request.base_url).rstrip("/")
+
+
 def register_frontend_static_routes(app: FastAPI, frontend_dir: Path) -> bool:
     """Register frontend static file routes if a built frontend is available.
 
@@ -55,6 +69,41 @@ def register_frontend_static_routes(app: FastAPI, frontend_dir: Path) -> bool:
         """Serve the frontend index.html."""
         return FileResponse(index_file)
 
+    @app.get("/site.webmanifest")
+    async def serve_webmanifest(request: Request):
+        """Serve a dynamic web manifest using the active request origin."""
+        origin = _resolve_request_origin(request)
+        manifest = {
+            "name": "RemoteTerm for MeshCore",
+            "short_name": "RemoteTerm",
+            "id": f"{origin}/",
+            "start_url": f"{origin}/",
+            "scope": f"{origin}/",
+            "display": "standalone",
+            "display_override": ["window-controls-overlay", "standalone", "fullscreen"],
+            "theme_color": "#111419",
+            "background_color": "#111419",
+            "icons": [
+                {
+                    "src": f"{origin}/web-app-manifest-192x192.png",
+                    "sizes": "192x192",
+                    "type": "image/png",
+                    "purpose": "maskable",
+                },
+                {
+                    "src": f"{origin}/web-app-manifest-512x512.png",
+                    "sizes": "512x512",
+                    "type": "image/png",
+                    "purpose": "maskable",
+                },
+            ],
+        }
+        return JSONResponse(
+            manifest,
+            media_type="application/manifest+json",
+            headers={"Cache-Control": "no-store"},
+        )
+
     @app.get("/{path:path}")
     async def serve_frontend(path: str):
         """Serve frontend files, falling back to index.html for SPA routing."""