Cannot upload file to localhost with Scala and JS-CodePudding

I'm trying to run an open-source tool that uses sbt on localhost (9000). However, when I try to upload a file (.arrf) to the tool, which is the first thing required by the tool, I get a FileNotFound error as in the following image.

I have no experience with Scala and have limited experience with JS but as far as I understand there is an issue when uploading the file to the server. I tried with files of different sizes and with files used by the original author. I looked into the code and file upload is handled by a FileUploadService.scala class which is as the following,

class FileUploadService(serviceSavePath: String) {

  val basePath = if (serviceSavePath.endsWith("/")) {
    serviceSavePath
  } else { serviceSavePath   "/" }

  val uploadedParts: ConcurrentMap[String, Set[FileUploadInfo]] = new ConcurrentHashMap(8, 0.9f, 1)

  def fileNameFor(fileInfo: FileUploadInfo) = {
    s"${basePath}${fileInfo.resumableIdentifier}-${fileInfo.resumableFilename}"
  }

  def isLast(fileInfo: FileUploadInfo): Boolean = {
    (fileInfo.resumableTotalSize - (fileInfo.resumableChunkSize * fileInfo.resumableChunkNumber)) < fileInfo.resumableChunkSize
  }

  def savePartialFile(filePart: Array[Byte], fileInfo: FileUploadInfo) {
    if (filePart.length != fileInfo.resumableChunkSize & !isLast(fileInfo)) {
      println("error uploading part")
      return
    }
    val partialFile = new RandomAccessFile(fileNameFor(fileInfo), "rw")
    val offset = (fileInfo.resumableChunkNumber - 1) * fileInfo.resumableChunkSize

    try {
      partialFile.seek(offset)
      partialFile.write(filePart, 0, filePart.length)
    } finally {
      partialFile.close()
    }

    val key = fileNameFor(fileInfo)
    if (uploadedParts.containsKey(key)) {
      val partsUploaded = uploadedParts.get(key)
      uploadedParts.put(key, partsUploaded   fileInfo)
    } else {
      uploadedParts.put(key, Set(fileInfo))
    }
  }

As far as I understand from the error, the error occurs in the savePartialFile function where it tries to create a new Random Access File. Here are the details of the last GET request before the error occurs. I also added the error log below. I added quite a lot of outputs and details because I'm very inexperienced in scala and web dev, yet I hope everything is clear.

Cheers!

2022-01-05 13:56:15,972 [ERROR] from application in application-akka.actor.default-dispatcher-86 - 

! @7m99nng77 - Internal server error, for (POST) [/upload?resumableChunkNumber=3&resumableChunkSize=1048576&resumableCurrentChunkSize=1048576&resumableTotalSize=17296294&resumableType=&resumableIdentifier=17296294-mixedDriftarff&resumableFilename=mixedDrift.arff&resumableRelativePath=mixedDrift.arff&resumableTotalChunks=16] ->
 
play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[FileNotFoundException: .\tmp\arff\17296294-mixedDriftarff-mixedDrift.arff (The system cannot find the path specified)]]
    at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:255)
    at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:182)
    at play.core.server.AkkaHttpServer$$anonfun$$nestedInanonfun$executeHandler$1$1.applyOrElse(AkkaHttpServer.scala:230)
    at play.core.server.AkkaHttpServer$$anonfun$$nestedInanonfun$executeHandler$1$1.applyOrElse(AkkaHttpServer.scala:229)
    at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:412)
    at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
    at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
    at play.api.libs.streams.Execution$trampoline$.executeScheduled(Execution.scala:109)
    at play.api.libs.streams.Execution$trampoline$.execute(Execution.scala:71)
    at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:68)
    at scala.concurrent.impl.Promise$DefaultPromise.$anonfun$tryComplete$1(Promise.scala:284)
    at scala.concurrent.impl.Promise$DefaultPromise.$anonfun$tryComplete$1$adapted(Promise.scala:284)
    at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:284)
    at scala.concurrent.Promise.complete(Promise.scala:49)
    at scala.concurrent.Promise.complete$(Promise.scala:48)
    at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:183)
    at scala.concurrent.Promise.failure(Promise.scala:100)
    at scala.concurrent.Promise.failure$(Promise.scala:100)
    at scala.concurrent.impl.Promise$DefaultPromise.failure(Promise.scala:183)
    at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
    at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
    at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
    at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:91)
    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
    at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:81)
    at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:91)
    at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:38)
    at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:43)
    at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.io.FileNotFoundException: .\tmp\arff\17296294-mixedDriftarff-mixedDrift.arff (The system cannot find the path specified)
    at java.io.RandomAccessFile.open0(Native Method)
    at java.io.RandomAccessFile.open(RandomAccessFile.java:316)
    at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)
    at java.io.RandomAccessFile.<init>(RandomAccessFile.java:124)
    at services.FileUploadService.savePartialFile(FileUploadService.scala:30)
    at controllers.OverviewController.$anonfun$upload$3(OverviewController.scala:161)
    at play.api.data.Form.fold(Form.scala:144)
    at controllers.OverviewController.$anonfun$upload$1(OverviewController.scala:156)
    at scala.Function1.$anonfun$andThen$1(Function1.scala:52)
    at play.api.mvc.ActionBuilderImpl.invokeBlock(Action.scala:482)
    at play.api.mvc.ActionBuilderImpl.invokeBlock(Action.scala:480)
    at play.api.mvc.ActionBuilder$$anon$9.invokeBlock(Action.scala:331)
    at play.api.mvc.ActionBuilder$$anon$9.invokeBlock(Action.scala:326)
    at play.api.mvc.ActionBuilder$$anon$2.apply(Action.scala:419)
    at play.api.mvc.Action.$anonfun$apply$2(Action.scala:96)
    at scala.concurrent.Future.$anonfun$flatMap$1(Future.scala:302)
    at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
    ... 12 common frames omitted

CodePudding user response：

Apparently, the author of the code is not creating folders programmatically in the code. So creating two empty directories as "tmp/arrf" in the base directory of the sbt project worked.