Fix file upload

app.py

@@ -7,6 +7,86 @@ import io
 # In-process client for the FastAPI app
 client = TestClient(fastapi_app)
 
+def read_file_input(file_obj):
+    if file_obj is None:
+        return None
+
+    # file-like object (has read)
+    if hasattr(file_obj, "read"):
+        try:
+            file_obj.seek(0)
+        except Exception:
+            pass
+        try:
+            data = file_obj.read()
+            # If read returns str (rare), encode it
+            if isinstance(data, str):
+                return data.encode()
+            return data
+        except Exception:
+            # continue to other strategies
+            pass
+
+    # raw bytes
+    if isinstance(file_obj, (bytes, bytearray)):
+        return bytes(file_obj)
+
+    # path string (local path)
+    if isinstance(file_obj, str):
+        try:
+            with open(file_obj, "rb") as f:
+                return f.read()
+        except Exception:
+            # not a path, fall through to try encoding string
+            return file_obj.encode()
+
+    # dict-like (old Gradio or different frontends)
+    try:
+        if isinstance(file_obj, dict):
+            # common keys: "name", "data"
+            if "data" in file_obj:
+                data = file_obj["data"]
+                if isinstance(data, (bytes, bytearray)):
+                    return bytes(data)
+                if isinstance(data, str):
+                    return data.encode()
+            if "name" in file_obj:
+                maybe_path = file_obj["name"]
+                if isinstance(maybe_path, str):
+                    try:
+                        with open(maybe_path, "rb") as f:
+                            return f.read()
+                    except Exception:
+                        pass
+    except Exception:
+        pass
+
+    # Object with attributes (NamedString with .name/.value)
+    try:
+        name = getattr(file_obj, "name", None)
+        data = getattr(file_obj, "data", None)
+        value = getattr(file_obj, "value", None)
+        if isinstance(data, (bytes, bytearray)):
+            return bytes(data)
+        if isinstance(value, (bytes, bytearray)):
+            return bytes(value)
+        if isinstance(value, str):
+            return value.encode()
+        if isinstance(name, str):
+            try:
+                with open(name, "rb") as f:
+                    return f.read()
+            except Exception:
+                pass
+    except Exception:
+        pass
+
+    # String representation encoded
+    try:
+        return str(file_obj).encode()
+    except Exception:
+        return None
+
 def call_generate(file_obj, topics, n_questions, difficulty, question_type):
     if file_obj is None:
         return {"error": "No file uploaded."}
@@ -52,7 +132,7 @@ with gr.Blocks(title="RAG MCQ generator") as gradio_app:
     gr.Markdown("## Upload a file and generate MCQs")
 
     with gr.Row():
-        file_input = gr.File(label="Upload file (PDF, docx, etc)")
+        file_input = gr.File(label="Upload file (PDF, docx, etc)", type="file")
         topics = gr.Textbox(label="Topics (comma separated)", placeholder="e.g. calculus, derivatives")
     with gr.Row():
         n_questions = gr.Slider(minimum=1, maximum=50, step=1, value=5, label="Number of questions")
@@ -71,5 +151,5 @@ with gr.Blocks(title="RAG MCQ generator") as gradio_app:
 app = gradio_app
 
 if __name__ == "__main__":
-    # demo.launch(server_name="0.0.0.0", server_port=7860, share=False)
+    # gradio_app.launch(server_name="0.0.0.0", server_port=7860, share=False)
     gradio_app.launch()