app.py

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

URL = config('URL')
OUTPUT_DIR = config('OUTPUT_DIR')
INPUT_DIR = config('INPUT_DIR')
COMF_PATH = config('COMF_PATH')

import torch

import spaces

print(f"Is CUDA available: {torch.cuda.is_available()}")
print(f"CUDA device: {torch.cuda.get_device_name(torch.cuda.current_device())}")
print(torch.version.cuda)
device = torch.cuda.get_device_name(torch.cuda.current_device())
print(device)


def wait_for_image_with_prefix(folder, prefix):
    def is_file_ready(file_path):
        initial_size = os.path.getsize(file_path)
        time.sleep(0.5)
        return initial_size == os.path.getsize(file_path)

    while True:
        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(1)
                return latest_image
        
        # If no matching file found, wait before checking again
        time.sleep(1)

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


def check_server_ready(new_port):
    try:
        response = requests.get(f"http://127.0.0.1:{new_port}/history/123", timeout=5)
        return response.status_code == 200
    except requests.RequestException:
        return False


@spaces.GPU(duration=240)
def generate_image(prompt, image):
    prompt = json.loads(prompt)
    
    previous_image = None

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

    new_port = random.randint(8188, 8288)
    prefix_filename = random.randint(0, 999999)
    # Запускаем скрипт как подпроцесс
    process = subprocess.Popen([sys.executable, COMF_PATH, "--listen", "127.0.0.1", "--port", f"{new_port}"])
    logger.debug(f'Subprocess started with PID: {process.pid}')
    latest_image = None
    try:
        # Ожидание запуска сервера
        for _ in range(20):  # Максимум 20 секунд ожидания
            if check_server_ready(new_port):  # Вам нужно реализовать эту функцию
                break
            time.sleep(1)
        else:
            raise TimeoutError("Server did not start in time")

        start_queue(prompt)

        # Ожидание нового изображения
        timeout = 220  # Максимальное время ожидания в секундах
        start_time = time.time()
        while time.time() - start_time < timeout:
            latest_image = wait_for_image_with_prefix(OUTPUT_DIR, prefix_filename)
            if latest_image != previous_image:
                logger.debug(f"file is: {latest_image}")
                with open(latest_image, 'rb') as f:
                    photo = file.read()
                logger.debug(f"file bytes size: {len(photo)}")
                delete_image_file(latest_image)
                return io.BytesIO(photo)
            time.sleep(1)

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

    except Exception as e:
        logger.error(f"Error in generate_image: {e}")
        raise
    finally:
        # Завершаем подпроцесс
        if process.poll() is None:
            process.terminate()
            try:
                process.wait(timeout=5)
            except subprocess.TimeoutExpired:
                process.kill()        
        
        #logger.error("No new image was generated")
        return latest_image


if __name__ == "__main__":
    demo = gr.Interface(fn=generate_image, inputs=[
        "text",
        gr.Image(image_mode='RGBA', type="numpy")
    ],
    outputs=[
        gr.Image(type="numpy", image_mode='RGBA')
    ])
    demo.launch(debug=True)
    logger.debug('demo.launch()')

    logger.info("Основной скрипт завершил работу.")