小程序使用云服务器上传图片

// 选择图片
wx.chooseImage({
  count: 1, // 默认9
  sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有
  sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
  success: function (res) {
    const tempFilePaths = res.tempFilePaths;
    // 上传图片
    wx.uploadFile({
      url: 'https://your-server-url/upload', // 替换为你的服务器地址
      filePath: tempFilePaths[0],
      name: 'file',
      formData: {
        'user': 'test'
      },
      success: function (res) {
        const data = JSON.parse(res.data);
        console.log('Upload success:', data);
      },
      fail: function (err) {
        console.error('Upload failed:', err);
      }
    });
  }
});

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

app.post('/upload', upload.single('file'), (req, res) => {
  if (!req.file) {
    return res.status(400).send('No file uploaded.');
  }
  res.send({
    message: 'File uploaded successfully',
    filename: req.file.filename
  });
});

app.listen(3000, () => {
  console.log('Server started on http://localhost:3000');
});