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47 lines
1.6 KiB
47 lines
1.6 KiB
const express = require('express');
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const axios = require('axios');
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const sharp = require('sharp');
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const fs = require('fs');
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const path = require('path');
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const crypto = require('crypto');
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const app = express();
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const port = 6000;
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app.use(express.static('public')); // 假设静态文件存放在 public 文件夹
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app.get('/download-image', async (req, res) => {
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const imageUrl = req.query.url; // 从查询参数中获取图片链接
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if (!imageUrl) {
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return res.status(400).send('Image URL is required');
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}
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try {
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// 下载图片
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const response = await axios.get(imageUrl, {
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responseType: 'arraybuffer', // 接收原始二进制数据
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});
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// 使用 sharp 将图片转换为 PNG 格式
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const buffer = Buffer.from(response.data, 'binary');
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const pngBuffer = await sharp(buffer)
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.png() // 转换为 PNG
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.toBuffer();
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// 生成随机文件名
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const randomFileName = `download_${crypto.randomBytes(8).toString('hex')}.png`;
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// 设置响应头，告诉浏览器这是一个文件下载请求
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res.attachment(randomFileName);
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res.set('Content-Type', 'image/png'); // 设置正确的 MIME 类型
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// 发送 PNG 图片的二进制数据给客户端
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res.send(pngBuffer);
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} catch (error) {
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console.error('Error downloading or converting image:', error);
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return res.status(500).send('Error downloading or converting image');
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}
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});
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app.listen(port, () => {
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console.log(`Server is running on port ${port}`);
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}); |