app.py

from flask import Flask, request, send_file, abort
import requests
import io
from PIL import Image
from cachetools import TTLCache, cached
import random
import os
import urllib.parse
import hashlib

app = Flask(__name__)

# Максимальные значения для ширины и высоты
MAX_WIDTH = 850
MAX_HEIGHT = 850

# Кэш на 10 минут
cache = TTLCache(maxsize=100, ttl=600)

# Получаем ключи из переменной окружения
keys = os.getenv("keys", "").split(',')
if not keys:
    raise ValueError("Environment variable 'keys' must be set with a comma-separated list of API keys.")

def get_random_key():
    return random.choice(keys)

def generate_cache_key(prompt, width, height, seed, model_name):
    # Создаем уникальный ключ на основе всех параметров
    return hashlib.md5(f"{prompt}_{width}_{height}_{seed}_{model_name}".encode()).hexdigest()

def scale_dimensions(width, height, max_width, max_height):
    """Масштабирует размеры изображения, сохраняя соотношение сторон."""
    aspect_ratio = width / height
    if width > max_width or height > max_height:
        if width / max_width > height / max_height:
            width = max_width
            height = int(width / aspect_ratio)
        else:
            height = max_height
            width = int(height * aspect_ratio)
    return width, height

@cached(cache)
def generate_cached_image(cache_key, prompt, width, height, seed, model_name):
    api_key = get_random_key()
    headers = {
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json"
    }
    data = {
        "inputs": prompt,
        "parameters": {
            "width": width,
            "height": height,
            "seed": seed
        }
    }

    try:
        response = requests.post(f"https://api-inference.huggingface.co/models/{model_name}", headers=headers, json=data)
        response.raise_for_status()
        image_data = response.content
        image = Image.open(io.BytesIO(image_data))
        return image
    except requests.exceptions.RequestException as e:
        app.logger.error(f"Error generating image: {e}")
        abort(500, description="Error generating image")

@app.route('/prompt/<path:prompt>')
def get_image(prompt):
    width = request.args.get('width', type=int, default=512)
    height = request.args.get('height', type=int, default=512)
    seed = request.args.get('seed', type=int, default=22)
    model_name = request.args.get('model', default="black-forest-labs_FLUX.1-dev").replace('_', '/')

    # Декодируем URL-кодированный prompt
    prompt = urllib.parse.unquote(prompt)

    # Масштабируем размеры изображения, если они превышают максимальные значения
    width, height = scale_dimensions(width, height, MAX_WIDTH, MAX_HEIGHT)

    # Генерируем уникальный ключ для кэша
    cache_key = generate_cache_key(prompt, width, height, seed, model_name)

    try:
        image = generate_cached_image(cache_key, prompt, width, height, seed, model_name)
    except Exception as e:
        app.logger.error(f"Error generating image: {e}")
        abort(500, description="Error generating image")

    img_byte_arr = io.BytesIO()
    image.save(img_byte_arr, format='PNG')
    img_byte_arr = img_byte_arr.getvalue()

    return send_file(
        io.BytesIO(img_byte_arr),
        mimetype='image/png'
    )

@app.route('/')
def health_check():
    return "OK", 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=7860, debug=False)