为了测试多部分流式上传到 S3 是否有效,我在三个执行点记录了时间日志 -
- 在开始从客户端上传之前(上传开始时间)
- 上传到EC2后(服务员完成时间)
- 转移到S3后(s3UploadFinishTime)
然后我从 EC2 运行。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 5 MB(如我所定义)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。它将显示文件部分上传进度以及部分编号。
console.log(evt);
对于所有三个上传服务员完成时间 and s3UploadFinishTime相同或几乎没有 1 秒的差异。
例子:
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 EC2 上部署的 REST API 通过 EC2 将文件上传到 S3 的最佳解决方案之一。