From e9ea2ab850a5251369217b48fd99b65ef4b6985d Mon Sep 17 00:00:00 2001 From: Zach Smith Date: Thu, 27 Apr 2017 11:55:16 -0700 Subject: Split FileStorage implementations into separate files --- .../xyz/driver/core/file/FileSystemStorage.scala | 57 +++++++++++++++++++ .../scala/xyz/driver/core/file/S3Storage.scala | 64 ++++++++++++++++++++++ src/main/scala/xyz/driver/core/file/package.scala | 51 +++++++++++++++++ 3 files changed, 172 insertions(+) create mode 100644 src/main/scala/xyz/driver/core/file/FileSystemStorage.scala create mode 100644 src/main/scala/xyz/driver/core/file/S3Storage.scala create mode 100644 src/main/scala/xyz/driver/core/file/package.scala (limited to 'src/main/scala/xyz/driver/core/file') diff --git a/src/main/scala/xyz/driver/core/file/FileSystemStorage.scala b/src/main/scala/xyz/driver/core/file/FileSystemStorage.scala new file mode 100644 index 0000000..bfe6995 --- /dev/null +++ b/src/main/scala/xyz/driver/core/file/FileSystemStorage.scala @@ -0,0 +1,57 @@ +package xyz.driver.core.file + +import java.io.File +import java.nio.file.{Path, Paths} + +import xyz.driver.core.{Name, Revision} +import xyz.driver.core.time.Time + +import scala.concurrent.{ExecutionContext, Future} +import scalaz.{ListT, OptionT} + +class FileSystemStorage(executionContext: ExecutionContext) extends FileStorage { + implicit private val execution = executionContext + + def upload(localSource: File, destination: Path): Future[Unit] = Future { + checkSafeFileName(destination) { + val destinationFile = destination.toFile + + if (destinationFile.getParentFile.exists() || destinationFile.getParentFile.mkdirs()) { + if (localSource.renameTo(destinationFile)) () + else { + throw new Exception( + s"Failed to move file from `${localSource.getCanonicalPath}` to `${destinationFile.getCanonicalPath}`") + } + } else { + throw new Exception(s"Failed to create parent directories for file `${destinationFile.getCanonicalPath}`") + } + } + } + + def download(filePath: Path): OptionT[Future, File] = + OptionT.optionT(Future { + Option(new File(filePath.toString)).filter(file => file.exists() && file.isFile) + }) + + def delete(filePath: Path): Future[Unit] = Future { + val file = new File(filePath.toString) + if (file.delete()) () + else { + throw new Exception(s"Failed to delete file $file" + (if (!file.exists()) ", file does not exist." else ".")) + } + } + + def list(path: Path): ListT[Future, FileLink] = + ListT.listT(Future { + val file = new File(path.toString) + if (file.isDirectory) { + file.listFiles().toList.filter(_.isFile).map { file => + FileLink(Name[File](file.getName), + Paths.get(file.getPath), + Revision[File](file.hashCode.toString), + Time(file.lastModified()), + file.length()) + } + } else List.empty[FileLink] + }) +} diff --git a/src/main/scala/xyz/driver/core/file/S3Storage.scala b/src/main/scala/xyz/driver/core/file/S3Storage.scala new file mode 100644 index 0000000..50bfe85 --- /dev/null +++ b/src/main/scala/xyz/driver/core/file/S3Storage.scala @@ -0,0 +1,64 @@ +package xyz.driver.core.file + +import java.io.File +import java.nio.file.{Path, Paths} +import java.util.UUID.randomUUID + +import com.amazonaws.services.s3.AmazonS3 +import com.amazonaws.services.s3.model.{Bucket, GetObjectRequest, ListObjectsV2Request} +import xyz.driver.core.{Name, Revision} +import xyz.driver.core.time.Time + +import scala.concurrent.{ExecutionContext, Future} +import scalaz.{ListT, OptionT} + +class S3Storage(s3: AmazonS3, bucket: Name[Bucket], executionContext: ExecutionContext) extends FileStorage { + implicit private val execution = executionContext + + def upload(localSource: File, destination: Path): Future[Unit] = Future { + checkSafeFileName(destination) { + val _ = s3.putObject(bucket.value, destination.toString, localSource).getETag + } + } + + def download(filePath: Path): OptionT[Future, File] = + OptionT.optionT(Future { + val tempDir = System.getProperty("java.io.tmpdir") + val randomFolderName = randomUUID().toString + val tempDestinationFile = new File(Paths.get(tempDir, randomFolderName, filePath.toString).toString) + + if (!tempDestinationFile.getParentFile.mkdirs()) { + throw new Exception(s"Failed to create temp directory to download file `$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 + }) +} diff --git a/src/main/scala/xyz/driver/core/file/package.scala b/src/main/scala/xyz/driver/core/file/package.scala new file mode 100644 index 0000000..8c06010 --- /dev/null +++ b/src/main/scala/xyz/driver/core/file/package.scala @@ -0,0 +1,51 @@ +package xyz.driver.core + +import java.io.File +import java.nio.file.Path + +import xyz.driver.core.time.Time + +import scala.concurrent.Future +import scalaz.{ListT, OptionT} + +package file { + final case class FileLink( + name: Name[File], + location: Path, + revision: Revision[File], + lastModificationDate: Time, + fileSize: Long + ) + + trait FileService { + + def getFileLink(id: Name[File]): FileLink + + def getFile(fileLink: FileLink): File + } + + trait FileStorage { + + def upload(localSource: File, destination: Path): Future[Unit] + + def download(filePath: Path): OptionT[Future, File] + + def delete(filePath: Path): Future[Unit] + + def list(path: Path): ListT[Future, FileLink] + + /** List of characters to avoid in S3 (I would say file names in general) + * + * @see http://stackoverflow.com/questions/7116450/what-are-valid-s3-key-names-that-can-be-accessed-via-the-s3-rest-api + */ + private val illegalChars = "\\^`><{}][#%~|&@:,$=+?; " + + protected def checkSafeFileName[T](filePath: Path)(f: => T): T = { + filePath.toString.find(c => illegalChars.contains(c)) match { + case Some(illegalCharacter) => + throw new IllegalArgumentException(s"File name cannot contain character `$illegalCharacter`") + case None => f + } + } + } +} -- cgit v1.2.3