109 lines
3.5 KiB
Python
109 lines
3.5 KiB
Python
import torch
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import requests
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from PIL import Image
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import io
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import os
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import hashlib
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import time
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from typing import Tuple
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class WebImageLoader:
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cache_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "cache")
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image_cache = {}
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@classmethod
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def INPUT_TYPES(s):
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return {
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"required": {
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"url": ("STRING", {"default": "", "multiline": False}),
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"use_cache": ("BOOLEAN", {"default": True}),
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},
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"_meta": {
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"preferred_width": 300,
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"maintain_dimensions": True
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}
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}
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RETURN_TYPES = ("IMAGE",)
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RETURN_NAMES = ("image",)
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FUNCTION = "load_image"
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CATEGORY = "🎨Painting👓Coder/🌐Web"
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def __init__(self):
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# 确保缓存目录存在
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if not os.path.exists(self.cache_dir):
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os.makedirs(self.cache_dir)
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def get_cache_path(self, url: str) -> str:
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"""生成缓存文件路径"""
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url_hash = hashlib.md5(url.encode()).hexdigest()
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return os.path.join(self.cache_dir, f"{url_hash}.png")
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def download_image(self, url: str) -> Image.Image:
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"""从URL下载图像"""
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try:
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response = requests.get(url, timeout=10)
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response.raise_for_status()
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return Image.open(io.BytesIO(response.content)).convert('RGB')
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except Exception as e:
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print(f"Error downloading image from {url}: {str(e)}")
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# 返回1x1的红色图像作为错误提示
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return Image.new('RGB', (1, 1), color='red')
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def save_to_cache(self, image: Image.Image, cache_path: str):
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"""保存图像到缓存"""
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try:
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image.save(cache_path, "PNG")
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except Exception as e:
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print(f"Error saving cache: {str(e)}")
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def load_from_cache(self, cache_path: str) -> Tuple[bool, Image.Image]:
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"""从缓存加载图像"""
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try:
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if os.path.exists(cache_path):
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return True, Image.open(cache_path).convert('RGB')
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except Exception as e:
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print(f"Error loading cache: {str(e)}")
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return False, None
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def load_image(self, url: str, use_cache: bool) -> Tuple[torch.Tensor]:
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"""主要加载函数"""
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try:
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if not url.strip():
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# 返回1x1的灰色图像作为空URL提示
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return (torch.ones((1, 1, 1, 3)) * 0.5,)
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cache_path = self.get_cache_path(url)
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image = None
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# 尝试从缓存加载
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if use_cache:
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cache_exists, cached_image = self.load_from_cache(cache_path)
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if cache_exists:
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image = cached_image
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# 如果没有缓存或不使用缓存，从URL下载
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if image is None:
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image = self.download_image(url)
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if use_cache:
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self.save_to_cache(image, cache_path)
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# 转换为tensor
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image_tensor = torch.from_numpy(np.array(image)).float() / 255.0
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image_tensor = image_tensor.unsqueeze(0)
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return (image_tensor,)
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except Exception as e:
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print(f"Error in WebImageLoader: {str(e)}")
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# 返回1x1的红色图像作为错误提示
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return (torch.tensor([[[[1.0, 0.0, 0.0]]]]),)
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# 添加到 ComfyUI 节点注册
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NODE_CLASS_MAPPINGS = {
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"WebImageLoader": WebImageLoader
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}
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NODE_DISPLAY_NAME_MAPPINGS = {
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"WebImageLoader": "Web Image Loader 🌐"
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} |