I am trying to stream large files to an endpoint. To briefly describe what 
this code does : - It generates a valid path, then stream the data to the 
disk, then store metadata.

It works well expect for one thing : The file seems to be stored in memory 
(as well as on the disk). My memory-free collectd metrics keeps going 
down...

Also, it is worth mentioning that the server returns a 503 error even 
though the asynchronous process complete just fine. I could add an onError 
handler but it seems that the future completes OK.


Do I need to cleanup something ? Is there something I am missing / doing 
wrong ?  Any Idea ?



I curl it like that :

curl --form "videos=@81770ea1-6cde-4a61-a63c-d060970e0084.mkv" 
http://myserver/videos


Thanks for the help! :)  



fileUpload("videos") {
            case (metadata, byteSource) =>
              val cdnPath = 
s"${DateTime.now.year}/${DateTime.now.month}/${DateTime.now.day}"
              val mountPoint = resolveBestMountPoint()
              val baseDirectory = s"$mountPoint/$cdnPath/"
              new JavaFile(baseDirectory).mkdirs()
              val baseFilename: String = 
s"${UUID.randomUUID().toString}.${metadata.fileName.split("\\.").last}"
              val file: Path = Paths.get(mountPoint) resolve 
s"$cdnPath/$baseFilename"
              val futureCopyToDisk: Future[IOResult] = 
byteSource.runWith(FileIO.toPath(file))
              val storeData: Future[(IOResult, Boolean)] = for {
                isCopied <- futureCopyToDisk
                isPersisted <- {
                  val metaDataOverview = 
PersistMetadataOverview(s"/$cdnPath/$baseFilename", baseFilename, 
metadata.contentType, metadata.fileName, isCopied.count, mountPoint)
                  metadataManager.persistMetadata(metaDataOverview)
                }
              } yield (isCopied, isPersisted)
              onSuccess(storeData) { (sum, isPersisted) =>
                (sum.wasSuccessful, isPersisted) match {
                  case (true, true) =>
                    logInfo(s"File successfully stored and persisted to 
${file.toString}")
                    complete(HttpResponse(StatusCodes.Created, headers = 
List(headerLocation(s"/videos/$baseFilename"))))
                  case (true, false) =>
                    
reject(UnableToPersistMetaDataToDataStore(file.toString))
                  case (false, true) =>
                    reject(UnableToPersistFileToDisk(file.toString))
                  case (false, false) =>
                    
reject(UnableToPersistFileAndMetadataToDataStore(file.toString))
                }
              }

          }

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