Fix infinite reload loop when gradio mounted as a sub application

CHANGELOG.md

@@ -70,6 +70,7 @@ gr.Interface(iteration,
 * Fixed videos being mirrored in the front-end if source is not webcam by [@freddyaboulton](https://github.com/freddyaboulton) in [PR 2475](https://github.com/gradio-app/gradio/pull/2475)
 * Add clear button for timeseries component [@dawoodkhan82](https://github.com/dawoodkhan82) in [PR 2487](https://github.com/gradio-app/gradio/pull/2487)
 * Removes special characters from temporary filenames so that the files can be served by components [@abidlabs](https://github.com/abidlabs) in [PR 2480](https://github.com/gradio-app/gradio/pull/2480)
+* Fixed infinite reload loop when mounting gradio as a sub application by [@freddyaboulton](https://github.com/freddyaboulton) in [PR 2477](https://github.com/gradio-app/gradio/pull/2477)
 
 ## Documentation Changes:
 * Adds a demo to show how a sound alert can be played upon completion of a prediction by [@abidlabs](https://github.com/abidlabs) in [PR 2478](https://github.com/gradio-app/gradio/pull/2478)

gradio/routes.py

@@ -461,7 +461,8 @@ def read_main():
         app = gr.mount_gradio_app(app, io, path="/gradio")
         # Then run `uvicorn run:app` from the terminal and navigate to http://localhost:8000/gradio.
     """
-
+    blocks.dev_mode = False
+    blocks.config = blocks.get_config_file()
     gradio_app = App.create_app(blocks)
 
     @app.on_event("startup")

test/test_routes.py

@@ -6,10 +6,12 @@
 from unittest.mock import patch
 
 import pytest
+import starlette.routing
 import websockets
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
+import gradio
 from gradio import Blocks, Interface, Textbox, close_all, routes
 
 os.environ["GRADIO_ANALYTICS_ENABLED"] = "False"
@@ -260,5 +262,22 @@ def test_get_server_url_from_ws_url(ws_url, answer):
     assert routes.get_server_url_from_ws_url(ws_url) == answer
 
 
+def test_mount_gradio_app_set_dev_mode_false():
+    app = FastAPI()
+
+    @app.get("/")
+    def read_main():
+        return {"message": "Hello!"}
+
+    with gradio.Blocks() as blocks:
+        gradio.Textbox("Hello from gradio!")
+
+    app = routes.mount_gradio_app(app, blocks, path="/gradio")
+    gradio_fast_api = next(
+        route for route in app.routes if isinstance(route, starlette.routing.Mount)
+    )
+    assert not gradio_fast_api.app.blocks.dev_mode
+
+
 if __name__ == "__main__":
     unittest.main()