diff options
Diffstat (limited to 'src/main/scala/xyz/driver/core/file/S3Storage.scala')
-rw-r--r-- | src/main/scala/xyz/driver/core/file/S3Storage.scala | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/main/scala/xyz/driver/core/file/S3Storage.scala b/src/main/scala/xyz/driver/core/file/S3Storage.scala new file mode 100644 index 0000000..933b01a --- /dev/null +++ b/src/main/scala/xyz/driver/core/file/S3Storage.scala @@ -0,0 +1,66 @@ +package xyz.driver.core.file + +import java.io.File +import java.nio.file.{Path, Paths} +import java.util.UUID.randomUUID + +import com.amazonaws.services.s3.AmazonS3 +import com.amazonaws.services.s3.model.{Bucket, GetObjectRequest, ListObjectsV2Request} +import xyz.driver.core.{Name, Revision} +import xyz.driver.core.time.Time + +import scala.concurrent.{ExecutionContext, Future} +import scalaz.{ListT, OptionT} + +class S3Storage(s3: AmazonS3, bucket: Name[Bucket], executionContext: ExecutionContext) extends FileStorage { + implicit private val execution = executionContext + + def upload(localSource: File, destination: Path): Future[Unit] = Future { + checkSafeFileName(destination) { + val _ = s3.putObject(bucket.value, destination.toString, localSource).getETag + } + } + + def download(filePath: Path): OptionT[Future, File] = + OptionT.optionT(Future { + val tempDir = System.getProperty("java.io.tmpdir") + val randomFolderName = randomUUID().toString + val tempDestinationFile = new File(Paths.get(tempDir, randomFolderName, filePath.toString).toString) + + if (!tempDestinationFile.getParentFile.mkdirs()) { + throw new Exception(s"Failed to create temp directory to download file `$tempDestinationFile`") + } else { + Option(s3.getObject(new GetObjectRequest(bucket.value, filePath.toString), tempDestinationFile)).map { _ => + tempDestinationFile + } + } + }) + + def delete(filePath: Path): Future[Unit] = Future { + s3.deleteObject(bucket.value, filePath.toString) + } + + def list(path: Path): ListT[Future, FileLink] = + ListT.listT(Future { + import scala.collection.JavaConverters._ + val req = new ListObjectsV2Request().withBucketName(bucket.value).withPrefix(path.toString).withMaxKeys(2) + + def isInSubFolder(path: Path)(fileLink: FileLink) = + fileLink.location.toString.replace(path.toString + "/", "").contains("/") + + Iterator.continually(s3.listObjectsV2(req)).takeWhile { result => + req.setContinuationToken(result.getNextContinuationToken) + result.isTruncated + } flatMap { result => + result.getObjectSummaries.asScala.toList.map { summary => + FileLink( + Name[File](summary.getKey), + Paths.get(path.toString + "/" + summary.getKey), + Revision[File](summary.getETag), + Time(summary.getLastModified.getTime), + summary.getSize + ) + } filterNot isInSubFolder(path) + } toList + }) +} |