如何使用express fileupload将上传的图像大小调整为特定的高度和宽度

npm install express express-fileupload

const express = require('express');
const fileUpload = require('express-fileupload');
const sharp = require('sharp');

const app = express();
app.use(fileUpload());

app.post('/upload', (req, res) => {
  if (!req.files || Object.keys(req.files).length === 0) {
    return res.status(400).send('No files were uploaded.');
  }

  const file = req.files.image;

  // 调整图像大小
  sharp(file.data)
    .resize({ width: 800, height: 600 })
    .toBuffer()
    .then((resizedImageBuffer) => {
      // 在这里处理调整后的图像，例如保存到磁盘或返回给客户端
      // ...

      res.send('Image uploaded and resized successfully.');
    })
    .catch((error) => {
      console.error(error);
      res.status(500).send('Error resizing image.');
    });
});