slpk layer testing 1.1

app.py

@@ -428,6 +428,35 @@ async def generate_i3s(request: GenerateI3SRequest):
         traceback.print_exc()
         raise HTTPException(status_code=500, detail=str(e))
 
+@app.middleware("http")
+async def i3s_json_middleware(request: Request, call_next):
+    # Check for ArcGIS-style query param f=pjson or f=json
+    if request.query_params.get("f") in ["json", "pjson"]:
+        # Allow normal processing first? No, static files don't handle query params usually
+        # We check if the path corresponds to a directory with 3dSceneLayer.json
+        
+        # Construct local path from URL path
+        # URL path: /layers/<uuid>/SceneLayer
+        # Local path: .../static/layers/<uuid>/SceneLayer
+        
+        path = request.url.path
+        if path.startswith("/layers"):
+            rel_path = path[len("/layers"):] # e.g. /<uuid>/SceneLayer
+            if rel_path.startswith("/"): rel_path = rel_path[1:]
+            
+            local_path = os.path.join(LAYERS_DIR, rel_path.replace("/", os.sep))
+            
+            # If request is for a directory (or valid path that is a dir)
+            if os.path.exists(local_path) and os.path.isdir(local_path):
+                json_path = os.path.join(local_path, "3dSceneLayer.json")
+                if os.path.exists(json_path):
+                    logger.info(f"Intercepting f=pjson for {path}, serving 3dSceneLayer.json")
+                    from fastapi.responses import FileResponse
+                    return FileResponse(json_path, media_type="application/json")
+    
+    response = await call_next(request)
+    return response
+
 @app.get("/")
 async def root():
     return {"message": "CityPyPRT 3D Generation API"}