不能存储文件超过管块大小（〜64K）更大。
使用MongoDB的3.4.0，相关节点的依赖
当发送比64K〜小的文件，控制台输出
bookeeppingData = {request, id, ...meta}
clone = lodash.cloneDeep(bookkeepingData)
const {
request: req,
id: _id,
meta: metadata,
} = clone
const bucket = new mongodb.GridFSBucket(
db,
{bucketName: 'my_gridfs_collection'}
);
const uploadSteam = bucket.openUploadStreamWithId(
_id,
undefined,
{metadata}
);
req.on('data', (chunk) => {
console.log(`Received ${chunk.length} bytes of data.`);
});
req.on('end', () => {
console.log('There will be no more data.');
});
req.on('error', (e) => {
console.log('req on error', e);
});
uploadSteam.on('finish', function() {
console.log('finsish');
keepThebooks(bookkeepingData);
});
uploadSteam.on('error', (e) => {
console.log('uploadstream on error', e);
});
req.pipe(uploadSteam);
这是相应的卷曲--verbose输出（减去JSON响应）：
Received 57259 bytes of data.
There will be no more data.
finish
当发送比〜64K的一个文件时，控制台输出是：
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8060 (#0)
* Server auth using Basic with user 'driver'
> POST /artifact?branch=xyz&role=PHOTO&where.lat=55&where.long=77.2&where.acc=12&sys=system&id=1234&sys=system2&id=1234b&created=2018-11-01T18:41:50.850Z&tz=-600 HTTP/1.1
> Host: localhost:8060
> Authorization: Basic xxxxxxxxx
> User-Agent: curl/7.61.1
> Accept: */*
> Content-Type: image/png
> Content-Length: 57259
> Expect: 100-continue
>
< HTTP/1.1 100 Continue
* We are completely uploaded and fine
< HTTP/1.1 200 OK
< Cache-Control: no-cache, no-store, must-revalidate
< Content-Type: application/json
< Content-Length: 388
< Date: Wed, 23 Jan 2019 20:58:16 GMT
< Connection: keep-alive
<
* Connection #0 to host localhost left intact
（这就是它 - 没有错误）
相应的卷曲--verbose输出是：
Received 65536 bytes of data.
我预计这个工作，并为控制台是这样的：
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8060 (#0)
* Server auth using Basic with user 'driver'
> POST /artifact?branch=xyz&role=PHOTO&where.lat=55&where.long=77.2&where.acc=12&sys=system&id=1234&sys=system2&id=1234b&created=2018-11-01T18:41:50.850Z&tz=-600 HTTP/1.1
> Host: localhost:8060
> Authorization: Basic xxxxxxxxx
> User-Agent: curl/7.61.1
> Accept: */*
> Content-Type: image/png
> Content-Length: 84801
> Expect: 100-continue
>
< HTTP/1.1 100 Continue
* We are completely uploaded and fine
* Empty reply from server
* Connection #0 to host localhost left intact
curl: (52) Empty reply from server
我在同一支球队。结果我们深克隆包含流的对象。当我们停下来克隆整个文件上传罚款。