Update app.py

app.py

@@ -10,6 +10,7 @@ import gradio as gr
 from fastapi import FastAPI, File, UploadFile, Form, HTTPException
 from fastapi.responses import JSONResponse, FileResponse
 from fastapi.middleware.cors import CORSMiddleware
+import uvicorn
 
 # ---------------------------------------------------------------------------
 # Monkey-patch gradio_client bug (Gradio 4.44.0):
@@ -29,19 +30,39 @@ def _safe_json_schema_to_python_type(schema, defs=None):
 _gc_utils._json_schema_to_python_type = _safe_json_schema_to_python_type
 
 # ---------------------------------------------------------------------------
-# Monkey-patch Jinja2 Environment.get_template to prevent
-# TypeError: unhashable type: 'dict' during template caching
+# Starlette / Gradio TemplateResponse compatibility
 # ---------------------------------------------------------------------------
-import jinja2
-
-_orig_get_template = jinja2.Environment.get_template
-
-def _safe_get_template(self, name, globals=None):
-    if isinstance(name, dict):
-        name = str(name)
-    return _orig_get_template(self, name, globals)
+# Gradio 4.x uses the older TemplateResponse calling convention while newer
+# Starlette releases expect the Request object first.  When these versions
+# are mixed, Starlette can pass the context dict to Jinja2 as the template
+# name, producing: TypeError: unhashable type: 'dict'.
+# Normalize the old Gradio call without changing Jinja2 itself.
+try:
+    from starlette.templating import Jinja2Templates
+
+    _original_template_response = Jinja2Templates.TemplateResponse
+
+    def _compatible_template_response(self, *args, **kwargs):
+        if (
+            len(args) >= 2
+            and isinstance(args[0], dict)
+            and isinstance(args[1], str)
+        ):
+            # New Starlette interprets args[0] as Request.  Gradio's older
+            # call style can provide context first and template name second.
+            context = args[0]
+            template_name = args[1]
+            remaining = args[2:]
+            return _original_template_response(
+                self, template_name, context, *remaining, **kwargs
+            )
+        return _original_template_response(self, *args, **kwargs)
 
-jinja2.Environment.get_template = _safe_get_template
+    Jinja2Templates.TemplateResponse = _compatible_template_response
+except Exception:
+    # Do not prevent the application from starting if the installed
+    # Starlette version does not expose this class in the expected form.
+    pass
 
 from backend.config import (
     KNOWN_CONFIDENCE_THRESHOLD,
@@ -294,7 +315,8 @@ with gr.Blocks(css=custom_css, title="Open-World Object Intelligence Platform")
                     confidence_slider,
                     similarity_slider
                 ],
-                outputs=[output_img, json_output]
+                outputs=[output_img, json_output],
+                api_name="detect"
             )
 
         # -------------------------------------------------------------------
@@ -326,7 +348,8 @@ with gr.Blocks(css=custom_css, title="Open-World Object Intelligence Platform")
             btn_teach.click(
                 fn=teach_new_object,
                 inputs=[teach_name, teach_category, teach_desc, teach_files],
-                outputs=[teach_status, objects_df]
+                outputs=[teach_status, objects_df],
+                api_name="teach_object"
             )
 
             btn_del.click(
@@ -513,11 +536,12 @@ def api_download_requirements_route():
 
 
 # ---------------------------------------------------------------------------
-# Mount Gradio app onto FastAPI app & launch with ZeroGPU support
+# Mount Gradio onto FastAPI and run ONE ASGI server
 # ---------------------------------------------------------------------------
+# Do not call demo.launch() after mount_gradio_app(). That starts a second
+# server and can cause routing/template failures on Hugging Face Spaces.
 app = gr.mount_gradio_app(app, demo, path="/")
 
 if __name__ == "__main__":
-    demo.launch(server_name="0.0.0.0", server_port=7860)
-else:
-    demo.launch(server_name="0.0.0.0", server_port=7860)
+    port = int(os.environ.get("PORT", os.environ.get("GRADIO_SERVER_PORT", "7860")))
+    uvicorn.run(app, host="0.0.0.0", port=port)