app.py

import os
from pathlib import Path
import gradio as gr
from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
import uvicorn

# Create FastAPI app
app = FastAPI()

# Create and configure static directory
static_dir = Path("./static")
static_dir.mkdir(parents=True, exist_ok=True)

# Mount static directory to FastAPI
app.mount("/static", StaticFiles(directory="static"), name="static")

# Tell Gradio which paths are allowed to be served
os.environ["GRADIO_ALLOWED_PATHS"] = str(static_dir.resolve())

def process_and_save(text):
    """Simple function that saves text to a file and returns file path"""
    # Save text to a file in static directory
    file_path = static_dir / "output.txt"
    with open(file_path, "w") as f:
        f.write(text)
    
    # Return file path for download
    return gr.File(value=file_path)

# Mark function as not requiring GPU
process_and_save.zerogpu = True

# Create Gradio interface
with gr.Blocks() as demo:
    text_input = gr.Textbox(label="Enter some text")
    submit_btn = gr.Button("Save and Download")
    output = gr.File(label="Download File")
    
    submit_btn.click(
        fn=process_and_save,
        inputs=text_input,
        outputs=output
    )

# Mount Gradio app to FastAPI
app = gr.mount_gradio_app(app, demo, path="/")

# Run server
if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=7860)