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我正在尝试通过 ec2 将文件上传到 s3。我的第一种方法是 - 将文件完全上传到 ec2，然后将该文件上传到 s3。这种方法不好，因为从 ec2 到 s3 的传输时间是浪费时间。

目前我正在尝试使用busboy 上传流到s3上传流，以便上传到 ec2，然后 ec2 到 s3 将同时完成，因为 s3 “上传”方法支持流作为上传主体。

这是我的代码 -

router.post('/s3StreamUpload', function(req, res, next) {
   var busboy = new Busboy({headers: req.headers});
   busboy.on('file', function (fieldname, file, filename, encoding, mimetype) {
      console.log('Before Upload: ' + new Date());
      console.log('File [' + fieldname + ']: filename: ' + filename + ', encoding: ' + encoding + ', mimetype: ' + mimetype);

      var s3 = new AWS.S3({
         params: {Bucket: 'sswa', Key: filename, Body: file},
         options: {partSize: 5 * 1024 * 1024, queueSize: 10}   // 5 MB
      });
      s3.upload().on('httpUploadProgress', function (evt) {
         console.log(evt);
      }).send(function (err, data) {
         console.log('After Upload: ' + new Date());
         console.log(err, data);
      });
   });
   busboy.on('field', function(fieldname, val, fieldnameTruncated, valTruncated, encoding, mimetype) {
      console.log('Field [' + fieldname + ']: value: ' + inspect(val));
   });
   busboy.on('finish', function() {
      console.log('Done parsing form!');
      res.writeHead(303, { Connection: 'close', Location: '/' });
      res.end();
   });
   req.pipe(busboy);
});

我怀疑它真的作为流同时上传到 s3 吗？这种方法有什么缺点吗？

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2 回答 2

4

为了测试多部分流式上传到 S3 是否正常工作，我在三个执行点记录了时间日志 -

  1. 从客户端开始上传之前（uploadStartTime）
  2. 上传到 EC2 后（busboyFinishTime）
  3. 转移到 S3 后 ( s3UploadFinishTime )

然后我从 EC2 运行。在上传各种长度的视频文件（36.1 MB、33.3 MB、52.5 MB）后，我观察到上传到 EC2 的每 5MB（如我定义的）部分会立即传输到 S3。将部件上传到 S3 时，您将看到以下行的日志。它将显示带有部件号的文件部分上传进度。

console.log(evt);

对于所有三个上传， busboyFinishTime和s3UploadFinishTime是相同的，或者几乎没有 1 秒的差异。

示例：上传 52.5 MB 时

{
  "uploadStartTime": "2016-04-28T14:19:51.365Z",
  "busboyFinishTime": "2016-04-28T14:22:26.292Z",
  "s3UploadFinishTime": "2016-04-28T14:22:26.558Z"
}

完整代码：

router.post('/s3StreamUpload', function(req, res, next) {
   var busboy = new Busboy({headers: req.headers});
   var uploadStartTime = new Date(),
      busboyFinishTime = null,
      s3UploadFinishTime = null;

   busboy.on('file', function (fieldname, file, filename, encoding, mimetype) {
      console.log('File [' + fieldname + ']: filename: ' + filename + ', encoding: ' + encoding + ', mimetype: ' + mimetype);

      var s3 = new AWS.S3({
         params: {Bucket: 'sswa', Key: filename, Body: file},
         options: {partSize: 5 * 1024 * 1024, queueSize: 10}   // 5 MB
      });
      s3.upload().on('httpUploadProgress', function (evt) {
         console.log(evt);
      }).send(function (err, data) {
         s3UploadFinishTime = new Date();
         if(busboyFinishTime && s3UploadFinishTime) {
            res.json({
               uploadStartTime: uploadStartTime,
               busboyFinishTime: busboyFinishTime,
               s3UploadFinishTime: s3UploadFinishTime
            });
         }
         console.log(err, data);
      });
   });
   busboy.on('field', function(fieldname, val, fieldnameTruncated, valTruncated, encoding, mimetype) {
      console.log('Field [' + fieldname + ']: value: ' + inspect(val));
   });
   busboy.on('finish', function() {
      console.log('Done parsing form!');
      busboyFinishTime = new Date();
      if(busboyFinishTime && s3UploadFinishTime) {
         res.json({
            uploadStartTime: uploadStartTime,
            busboyFinishTime: busboyFinishTime,
            s3UploadFinishTime: s3UploadFinishTime
         });
      }
   });
   req.pipe(busboy);
});

根据我的观察，我相信这是使用部署在 EC2 上的 REST API 通过 EC2 将文件上传到 S3 的最佳解决方案之一。

于 2016-04-28T14:50:26.800 回答
1

Are you trying to upload to S3 directly from browser? If so you can use presigned-put for direct browser to S3 uploads.

This is how you generate a presigned PUT url using minio-js

s3Client.presignedPutObject('my-bucketname', 'my-objectname', 1000, function(e, presignedUrl) {
  if (e) return console.log(e)
  console.log(presignedUrl)
})

Now you pass this presigned URL to the browser client which can use XMLHttpRequest to directly PUT a file to S3.

于 2016-05-02T14:01:27.680 回答