app.py

import gradio as gr
import fastapi

def echo(request: gr.Request):
    return request.headers, request.client.host

with gr.Blocks() as demo:
    with gr.Column():
        with gr.Row():
            with_q = gr.Button(value="Print request with queue")
        with gr.Row():
            with_q_headers = gr.JSON()
            with_q_host = gr.Textbox()
    with gr.Column():
        with gr.Row():
            without_q = gr.Button(value="print request without queue")
        with gr.Row():
            without_q_headers = gr.JSON()
            without_q_host = gr.Textbox()
    with_q.click(echo, inputs=None, outputs=[with_q_headers, with_q_host], queue=True)
    without_q.click(echo, inputs=None, outputs=[without_q_headers, without_q_host], queue=False)

demo.queue().launch()