如何將圖像上傳到節點中的s3

將我的反應前端中的文件發佈到節點後端。如何將圖像上傳到節點中的s3

request 
.post('/api/upload') 
.field('fileName', res.body.text) 
.field('filePath', `/${this.s3DirName}`) // set dynamically 
.attach('file', data.file) 
.end((err2, res2) => { 
    if (err2){ 
     console.log('err2', err2); 
     this.setState({ error: true, sending: false, success: true }); 
    }else{ 
     console.log('res2', res2); 
     this.setState({ error: false, sending: false, success: true }); 
    } 

});

然後在我的節點後端我想上傳到s3。我使用busboy能夠獲取發佈的多部分文件，然後將aws sdk發送到我的s3存儲桶。

var AWS = require('aws-sdk'); 

const s3 = new AWS.S3({ 
    apiVersion: '2006-03-01', 
    params: {Bucket: 'bucketName'} 
}); 

static upload(req, res) { 

    req.pipe(req.busboy); 

    req.busboy.on('file', (fieldname, file, filename) => { 
     console.log("Uploading: " + filename); 
     console.log("file: ", file); 

     var params = { 
     Bucket: 'bucketName', 
     Key: filename, 
     Body: file 
     }; 

     s3.putObject(params, function (perr, pres) { 
     if (perr) { 
      console.log("Error uploading data: ", perr); 
      res.send('err') 
     } else { 
      console.log("Successfully uploaded data to myBucket/myKey"); 
      res.send('success') 
     } 
     }); 

    }); 

}

，但我得到的錯誤

Error uploading data: { Error: Cannot determine length of [object Object]

上午我直接上傳文件對象糾正或做我需要解析的呢？也許我應該使用uploadFile而不是putObject？

如果有幫助，這是我的console.logs，我日誌的文件和文件名

Uploading: 31032017919Chairs.jpg 
file: FileStream { 
    _readableState: 
    ReadableState { 
    objectMode: false, 
    highWaterMark: 16384, 
    buffer: BufferList { head: null, tail: null, length: 0 }, 
    length: 0, 
    pipes: null, 
    pipesCount: 0, 
    flowing: null, 
    ended: false, 
    endEmitted: false, 
    reading: false, 
    sync: true, 
    needReadable: false, 
    emittedReadable: false, 
    readableListening: false, 
    resumeScheduled: false, 
    defaultEncoding: 'utf8', 
    ranOut: false, 
    awaitDrain: 0, 
    readingMore: false, 
    decoder: null, 
    encoding: null }, 
    readable: true, 
    domain: null, 
    _events: { end: [Function] }, 
    _eventsCount: 1, 
    _maxListeners: undefined, 
    truncated: false, 
    _read: [Function] }

來源

2017-04-17 Stretch0