在Node，Express With Multer上传前验证图片的宽度和高度

const express = require('express');
const multer = require('multer');

const app = express();

const upload = multer({ dest: 'uploads/' });

app.post('/upload', upload.single('image'), (req, res) => {
  // 在这里进行图片宽度和高度的验证
});

npm install image-size

const sizeOf = require('image-size');

app.post('/upload', upload.single('image'), (req, res) => {
  const imagePath = req.file.path;
  const dimensions = sizeOf(imagePath);

  const width = dimensions.width;
  const height = dimensions.height;

  // 在这里进行图片宽度和高度的验证
});

app.post('/upload', upload.single('image'), (req, res) => {
  const imagePath = req.file.path;
  const dimensions = sizeOf(imagePath);

  const width = dimensions.width;
  const height = dimensions.height;

  if (width >= 800 && height >= 600) {
    // 图片尺寸符合要求
    res.status(200).json({ message: '图片上传成功' });
  } else {
    // 图片尺寸不符合要求
    res.status(400).json({ error: '图片尺寸不符合要求' });
  }
});