How to get information about the file-CodePudding

I am able to open and stream the file no issue by using the following, however I need to be able to use the file information that is stored inside the bucket.

 const db = connection.connections[0].db
          const bucket = new mongoose.mongo.GridFSBucket(db, {
            bucketName: bucketName
          });
          bucket.openDownloadStreamByName(filename).pipe(res)

For example I would like to be able to set the following

res.setHeader('Content-Type', (TYPE)),
res.setHeader('Content-Length', (LENGTH)),

I am wondering the following above allows options however I don't know if the pipe stops us from setting the content-type and length after it starts piping.

CodePudding user response：

According to docs, no you can't get file info from stream but in source code seems you can.

According to this and this, you could get contentType by accessing

bucket.openDownloadStreamByName(...).s.files[0].contentType

bucket.openDownloadStreamByName(...).s.file?.contentType