Merge pull request langchain-ai#155 from langchain-ai/nc/jan30/fix-ui…

…-folder-missing

Fix for when backend/ui folder is missing

.env.gcp.yaml.example

@@ -13,3 +13,5 @@ AZURE_OPENAI_API_BASE: your_secret_here
 AZURE_OPENAI_API_VERSION: your_secret_here
 AZURE_OPENAI_API_KEY: your_secret_here
 KAY_API_KEY: your_secret_here
+ROBOCORP_ACTION_SERVER_URL: https://dummy-action-server.robocorp.link
+ROBOCORP_ACTION_SERVER_KEY: dummy-api-key

backend/app/server.py

@@ -1,3 +1,5 @@
+import os
+import logging
 from pathlib import Path
 
 import orjson
@@ -7,6 +9,8 @@
 from app.api import router as api_router
 from app.upload import ingest_runnable
 
+logger = logging.getLogger(__name__)
+
 app = FastAPI(title="OpenGPTs API")
 
 
@@ -24,7 +28,12 @@ def ingest_files(files: list[UploadFile], config: str = Form(...)) -> None:
     return ingest_runnable.batch([file.file for file in files], config)
 
 
-app.mount("", StaticFiles(directory=str(ROOT / "ui"), html=True), name="ui")
+ui_dir = str(ROOT / "ui")
+
+if os.path.exists(ui_dir):
+    app.mount("", StaticFiles(directory=ui_dir, html=True), name="ui")
+else:
+    logger.warn("No UI directory found, serving API only.")
 
 if __name__ == "__main__":
     import uvicorn