将收到的`.csv`文件从Node js传递给其他服务器

Question

我正在尝试将.csv节点js中的文件发送到另一台服务器

uploadCSVData = async(
    req: Request,
    res: Response,
    next: any
):Promise<any> =>{
    const csvForm = new FormData();
    csvForm.append('upload', fs.createReadStream(req.file.path));
    console.log(csvForm);
    const options = {
         upload: csvForm,
         headers: {
                    authorization: req.headers.svctoken,
                    'Content-type': 'multipart/form-data'
                },
         json: true
    };
    const response = await this.postSvc.exec(
                ['https://come/svc', `someAPI?id=${req.body.acntID}`]
                .join('/'),
                options
        );

return res.status(200).json(response.body);
}

我可以看到错误:

"Content-Type中没有多部分边界参数"

如何将此发送req.file到另一个期望的服务器'multipart/form-data'

我不认为boundary在使用时明确添加是一个好主意form-data

在csvForm控制台日志下面是:

FormData {
  _overheadLength: 167,
  _valueLength: 0,
  _valuesToMeasure:
   [ ReadStream {
       _readableState: [ReadableState],
       readable: true,
       _events: [Object],
       _eventsCount: 3,
       _maxListeners: undefined,
       path: 'uploads\\1533537127411_sample1.csv',
       fd: null,
       flags: 'r',
       mode: 438,
       start: undefined,
       end: Infinity,
       autoClose: true,
       pos: undefined,
       bytesRead: 0,
       closed: false,
       emit: [Function] } ],
  writable: false,
  readable: true,
  dataSize: 0,
  maxDataSize: 2097152,
  pauseStreams: true,
  _released: false,
  _streams:
   [ '----------------------------481765298048352594095608\r\nContent-Disposition: form-data; name="upload"; filename="1533537127411_sample1.csv"\r\nContent-Type: text/csv\r\n\r\n',
     DelayedStream {
       source: [ReadStream],
       dataSize: 0,
       maxDataSize: Infinity,
       pauseStream: true,
       _maxDataSizeExceeded: false,
       _released: false,
       _bufferedEvents: [Array],
       _events: [Object],
       _eventsCount: 1 },
     [Function: bound ] ],
  _currentStream: null,
  _boundary: '--------------------------481765298048352594095608' }

另一种方法

我尝试直接传递文件而不是创建FormData(),如:

        const options = {
                upload: req.file,
                headers: {
                    authorization: req.headers.svctoken,
                    'Content-type': 'multipart/form-data'
                },
                json: true
        };

但错误仍然存​​在

Answer 1

我对此表示同意/sf/users/255408541/，目前尚不清楚您使用哪个库来发出请求。话虽如此，看起来您可能正在使用https://www.npmjs.com/package/form-data来处理表单数据。

查看该模块的文档，似乎不需要Content-Type在发出请求时显式添加标头。只需使用实例submit的方法form来发送数据即可。请注意，下面的示例来自表单数据模块文档：

csvForm.submit({
  host: 'example.com',
  path: '/your-path',
  headers: { authorization: req.headers.svctoken }
}, function(err, res) {
  console.log(res.statusCode);
});

要使用Request库传递带有 formData 的文件，您可以执行以下操作：

const formData = {
  my_field: 'my_value',
  upload: fs.createReadStream(req.file.path),
};


request.post({url:'https://yourservice.com/upload', formData: formData}, function(err, httpResponse, body) {
  if (err) {
    return console.error('upload failed:', err);
  }
  console.log('Upload successful!  Server responded with:', body);
}); 

希望这有帮助。