从Flutter客户端解析Node.JS中的多部分请求正文

import 'package:dio/dio.dart';

void sendMultipartRequest() async {
  Dio dio = Dio();
  
  FormData formData = FormData();
  formData.files.add(MapEntry(
    "file",
    await MultipartFile.fromFile("/path/to/file.jpg"),
  ));
  formData.fields.add(MapEntry("name", "John Doe"));
  
  await dio.post(
    "https://example.com/upload",
    data: formData,
    options: Options(
      contentType: "multipart/form-data",
    ),
  );
}

npm install multer

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

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

app.post('/upload', upload.array('file'), (req, res) => {
  // 处理上传的文件
  const files = req.files;
  // 处理其他数据
  const name = req.body.name;
  
  // 返回响应
  res.send('Upload successful!');
});

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