Accept deprecated file route as well (#2099)

* fix

* added docs

* fixes

gradio/routes.py

@@ -236,6 +236,10 @@ class App(FastAPI):
                     f"it is not in any of {app.blocks.temp_dirs}"
                 )
 
+        @app.get("/file/{path:path}", dependencies=[Depends(login_check)])
+        def file_deprecated(path: str):
+            return file(path)
+
         async def run_predict(
             body: PredictBody, username: str = Depends(get_current_user)
         ):

guides/2)building_interfaces/4)advanced_interface_features.md

@@ -25,7 +25,17 @@ $code_gender_sentence_custom_interpretation
 
 ## Custom Styling
 
-If you'd like to have more fine-grained control over any aspect of your demo, you can also write your own css or pass in a css file, with the `css` parameter of the `Interface` class.
+If you'd like to have more fine-grained control over any aspect of your demo, you can also write your own css or pass in a filepath to a css file, with the `css` parameter of the `Interface` class.
+
+```python
+gr.Interface(..., css="body {background-color: red}")
+```
+
+If you'd like to reference external files in your css, preface the file path (which can be a relative or absolute path) with `"file="`, for example:
+
+```python
+gr.Interface(..., css="body {background-image: url('file=clouds.jpg')}")
+```
 
 ## Loading Hugging Face Models and Spaces
 

guides/3)building_with_blocks/4)custom_CSS_and_JS.md

@@ -9,7 +9,14 @@ with gr.Blocks(css="body {background-color: red}") as demo:
     ...
 ```
 
-You can also pass the filepath to a CSS file to this argument.
+If you'd like to reference external files in your css, preface the file path (which can be a relative or absolute path) with `"file="`, for example:
+
+```python
+with gr.Blocks(css="body {background-image: url('file=clouds.jpg')}") as demo:
+    ...
+```
+
+You can also pass the filepath to a CSS file to the `css` argument.
 
 ## The `elem_id` Argument