app.py

import spaces
import gradio as gr
import numpy as np
import random
import multiprocessing
import subprocess
import sys
import time
import signal
import json
import os
import requests

from loguru import logger
from decouple import config

from pathlib import Path
from PIL import Image
import io
import torch


URL="http://127.0.0.1"
OUTPUT_DIR="ComfyUI/output"
INPUT_DIR="ComfyUI/input"
BACKEND_PATH="ComfyUI/main.py"


def read_prompt_from_file(filename):
    with open(filename, 'r', encoding='utf-8') as file:
        return json.load(file)

def wait_for_image_with_prefix(folder, prefix):
    def is_file_ready(file_path):
        initial_size = os.path.getsize(file_path)
        time.sleep(1)
        return initial_size == os.path.getsize(file_path)

    files = os.listdir(folder)
    image_files = [f for f in files if f.lower().startswith(prefix.lower()) and
                   f.lower().endswith(('.png', '.jpg', '.jpeg'))]

    if image_files:
        # Sort by modification time to get the latest file
        image_files.sort(key=lambda x: os.path.getmtime(os.path.join(folder, x)), reverse=True)
        latest_image = os.path.join(folder, image_files[0])

        if is_file_ready(latest_image):
            # Wait a bit more to ensure the file is completely written
            time.sleep(3)
            return latest_image

    return None

def delete_image_file(file_path):
    try:
        if os.path.exists(file_path):
            os.remove(file_path)
            logger.debug(f"file {file_path} deleted")
        else:
            logger.debug(f"file {file_path} is not exist")
    except Exception as e:
        logger.debug(f"error {file_path}: {str(e)}")

def start_queue(prompt_workflow, port):
    p = {"prompt": prompt_workflow}
    data = json.dumps(p).encode('utf-8')
    requests.post(f"{URL}:{port}/prompt", data=data)

def check_server_ready(port):
    try:
        response = requests.get(f"{URL}:{port}/history/123", timeout=5)
        return response.status_code == 200
    except requests.RequestException:
        return False


def generate_image(prompt, image):
    prefix_filename = str(random.randint(0, 999999))
    try:
        prompt = prompt.replace('ComfyUI', prefix_filename)
        prompt = json.loads(prompt)
    except:
        prompt = read_prompt_from_file('config.json')
        prompt = json.dumps(prompt, ensure_ascii=False).replace('output_image', prefix_filename)
        prompt = json.loads(prompt)

    image = Image.fromarray(image)
    image.save(INPUT_DIR + '/input.png', format='PNG')

    process = None
    new_port = str(random.randint(8123, 8200))

    try:        
        process = subprocess.Popen([sys.executable, BACKEND_PATH, "--listen", "127.0.0.1", "--port", new_port])
        logger.debug(f'Subprocess started with PID: {process.pid}')
      
        for _ in range(40): 
            if check_server_ready(new_port):
                break
            time.sleep(1)
        else:
            raise TimeoutError("Server did not start in time")

        start_queue(prompt, new_port)
        
        timeout = 240
        start_time = time.time()
        while time.time() - start_time < timeout:
            latest_image = wait_for_image_with_prefix(OUTPUT_DIR, prefix_filename)
            if latest_image:
                logger.debug(f"file is: {latest_image}")
                try:
                    return Image.open(latest_image)
                finally:
                    delete_image_file(latest_image)
                    delete_image_file(INPUT_DIR + '/input.png')
            time.sleep(1)

        raise TimeoutError("New image was not generated in time")

    except Exception as e:
        logger.error(f"Error in generate_image: {e}")        

    finally:        
        if process and process.poll() is None:
            process.terminate()
            logger.debug("process.terminate()")
            try:
                logger.debug("process.wait(timeout=5)")
                process.wait(timeout=5)
            except subprocess.TimeoutExpired:
                logger.debug("process.kill()")
                process.kill()



@spaces.GPU(duration=50)
def generate_image_50(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=70)
def generate_image_70(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=90)
def generate_image_90(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=110)
def generate_image_110(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=130)
def generate_image_130(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=150)
def generate_image_150(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=170)
def generate_image_170(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=190) 
def generate_image_190(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=200)
def generate_image_200(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=210)
def generate_image_210(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=220)
def generate_image_220(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=230)
def generate_image_230(prompt, image):
  return generate_image(prompt, image)

@spaces.GPU(duration=240)
def generate_image_240(prompt, image):
  return generate_image(prompt, image)


def generate_image_wrapper(prompt, image, duration):
    if duration == "50":
        return generate_image_50(prompt, image)
    elif duration == "70":
        return generate_image_70(prompt, image)
    elif duration == "90":
        return generate_image_90(prompt, image)
    elif duration == "110":
        return generate_image_110(prompt, image)
    elif duration == "130":
        return generate_image_130(prompt, image)
    elif duration == "150":
        return generate_image_150(prompt, image)
    elif duration == "170":
        return generate_image_170(prompt, image)
    elif duration == "190":
        return generate_image_190(prompt, image)
    elif duration == "200":
        return generate_image_200(prompt, image)
    elif duration == "210":
        return generate_image_210(prompt, image)
    elif duration == "220":
        return generate_image_220(prompt, image)
    elif duration == "230":
        return generate_image_230(prompt, image)
    elif duration == "240":
        return generate_image_240(prompt, image)
    else:
        return generate_image_170(prompt, image)

if __name__ == "__main__":
    demo = gr.Interface(
        fn=generate_image_wrapper,
        inputs=[
        "text",
        gr.Image(image_mode='RGBA', type="numpy"),
        "text"
    ],
        outputs=[gr.Image(type="numpy", image_mode='RGBA')],
        title="Image Upscaler",
        description="BEST UPSCALER EVER!!!!!"
    )
    demo.launch(debug=True)
    logger.debug('demo.launch()')

    logger.info("finish")