Fix isssue with running with nginx gradio-app#4133 (@abidlabs work re…

…based to v3.23.0).

gradio/blocks.py

@@ -71,7 +71,6 @@ def __init__(
         self._skip_init_processing = _skip_init_processing
         self._style = {}
         self.parent: BlockContext | None = None
-        self.root = ""
 
         if render:
             self.render()
@@ -560,6 +559,8 @@ def __init__(
 
         self.file_directories = []
 
+        self.root_path = ""
+
         if self.analytics_enabled:
             data = {
                 "mode": self.mode,
@@ -1114,7 +1115,6 @@ def get_config_file(self):
             "show_api": self.show_api,
             "is_colab": utils.colab_check(),
             "stylesheets": self.stylesheets,
-            "root": self.root,
         }
 
         def getLayout(block):
@@ -1328,6 +1328,7 @@ def launch(
         quiet: bool = False,
         show_api: bool = True,
         file_directories: List[str] | None = None,
+        root_path: str = "",
         _frontend: bool = True,
     ) -> Tuple[FastAPI, str, str]:
         """
@@ -1358,6 +1359,7 @@ def launch(
             quiet: If True, suppresses most print statements.
             show_api: If True, shows the api docs in the footer of the app. Default True. If the queue is enabled, then api_open parameter of .queue() will determine if the api docs are shown, independent of the value of show_api.
             file_directories: List of directories that gradio is allowed to serve files from (in addition to the directory containing the gradio python file). Must be absolute paths. Warning: any files in these directories or its children are potentially accessible to all users of your app.
+            root_path: The root path (or "mount point") of the application, if it's not served from the root ("/") of the domain. Often used when the application is behind a reverse proxy that forwards requests to the application. For example, if the application is served at "https://example.com/myapp", the `root_path` should be set to "/myapp".
         Returns:
             app: FastAPI app object that is running the demo
             local_url: Locally accessible link to the demo
@@ -1393,6 +1395,7 @@ def reverse(text):
         self.height = height
         self.width = width
         self.favicon_path = favicon_path
+        self.root_path = root_path
 
         if enable_queue is not None:
             self.enable_queue = enable_queue

gradio/routes.py

@@ -132,6 +132,7 @@ def configure_app(self, blocks: gradio.Blocks) -> None:
         self.cwd = os.getcwd()
         self.favicon_path = blocks.favicon_path
         self.tokens = {}
+        self.root_path = blocks.root_path
 
     def get_blocks(self) -> gradio.Blocks:
         if self.blocks is None:
@@ -219,15 +220,17 @@ def login(form_data: OAuth2PasswordRequestForm = Depends()):
         def main(request: fastapi.Request, user: str = Depends(get_current_user)):
             mimetypes.add_type("application/javascript", ".js")
             blocks = app.get_blocks()
+            root_path = request.scope.get("root_path")
 
             if app.auth is None or not (user is None):
                 config = app.get_blocks().config
+                config["root"] = root_path
             else:
                 config = {
                     "auth_required": True,
                     "auth_message": blocks.auth_message,
                     "is_space": app.get_blocks().is_space,
-                    "root": app.get_blocks().root,
+                    "root": root_path,
                 }
 
             try:
@@ -252,8 +255,12 @@ def main(request: fastapi.Request, user: str = Depends(get_current_user)):
 
         @app.get("/config/", dependencies=[Depends(login_check)])
         @app.get("/config", dependencies=[Depends(login_check)])
-        def get_config():
-            return app.get_blocks().config
+        def get_config(request: fastapi.Request):
+            root_path = request.scope.get("root_path")
+            config = app.get_blocks().config
+            config["root"] = root_path
+            return config
+
 
         @app.get("/static/{path:path}")
         def static_resource(path: str):
@@ -756,7 +763,6 @@ def read_main():
         # Then run `uvicorn run:app` from the terminal and navigate to http://localhost:8000/gradio.
     """
     blocks.dev_mode = False
-    blocks.root = path[:-1] if path.endswith("/") else path
     blocks.config = blocks.get_config_file()
     gradio_app = App.create_app(blocks)