ueditor跨服务器上传图片

// 示例代码：Node.js中设置CORS头
const express = require('express');
const app = express();

app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Type', 'application/json');
  next();
});

app.post('/upload', (req, res) => {
  // 处理上传逻辑
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

// 示例代码：前端文件大小验证
document.getElementById('fileInput').addEventListener('change', (event) => {
  const file = event.target.files[0];
  if (file.size > 5 * 1024 * 1024) { // 5MB
    alert('文件大小不能超过5MB');
    event.target.value = '';
  }
});

// 示例代码：分块上传
function uploadChunk(file, chunkIndex, totalChunks) {
  const chunk = file.slice(chunkIndex * chunkSize, (chunkIndex + 1) * chunkSize);
  const formData = new FormData();
  formData.append('file', chunk);
  formData.append('chunkIndex', chunkIndex);
  formData.append('totalChunks', totalChunks);

  fetch('/upload', {
    method: 'POST',
    body: formData
  }).then(response => {
    if (response.ok) {
      // 处理上传成功逻辑
    } else {
      // 处理上传失败逻辑
    }
  });
}