我正在尝试使用浏览器中的ng-file-upload
上传一个.csv
文件,并在后端使用Play for Scala2.5.x。
如果我在Play中使用moveTo
,则该文件已上传,但使用标头和尾标而不是普通文件生成:
request.body.moveTo(new File("c:\\tmp\\uploaded\\filetest.csv"))
有没有办法只保存数据部分?
另外,我尝试了以下
def doUpload = Action(parse.multipartFormData) { request =>
println(request.contentType.get)
println(request.body)
request.body.file("file").map { file =>
val filename = file.filename
val contentType = file.contentType
file.ref.moveTo(new File("c:\\tmp\\uploaded\\filetest.csv"))
}
Ok("file uploaded at " + new java.util.Date())
}
但是地图是空的。 这是我在前两个println
语句中得到的:
multipart / form-data MultipartFormData(Map(),Vector(FilePart(file,hello2.csv,Some(application / vnd.ms-excel),TemporaryFile(C:\\ Users \\ BUSINE〜1 \\ AppData \\ Local \\ Temp \\ playtemp2236977636541678879) \\ multipartBody2268668511935303172asTemporaryFile)))),Vector())
表示我正在接收某些东西,但是我无法提取它。 有任何想法吗?
也许有些冗长,但却可以满足您的要求。
请注意,我在Mac上,因此您可能必须更改copyFile
的/tmp/uploaded/
路径,因为它看起来就像在Windows上一样。
package controllers
import java.io.File
import java.nio.file.attribute.PosixFilePermission._
import java.nio.file.attribute.PosixFilePermissions
import java.nio.file.{Files, Path}
import java.util
import javax.inject._
import akka.stream.IOResult
import akka.stream.scaladsl._
import akka.util.ByteString
import play.api._
import play.api.data.Form
import play.api.data.Forms._
import play.api.i18n.MessagesApi
import play.api.libs.streams._
import play.api.mvc.MultipartFormData.FilePart
import play.api.mvc._
import play.core.parsers.Multipart.FileInfo
import scala.concurrent.Future
import java.nio.file.StandardCopyOption._
import java.nio.file.Paths
case class FormData(filename: String)
// Type for multipart body parser
type FilePartHandler[A] = FileInfo => Accumulator[ByteString, FilePart[A]]
val form = Form(mapping("file" -> text)(FormData.apply)(FormData.unapply))
private def deleteTempFile(file: File) = Files.deleteIfExists(file.toPath)
// Copies temp file to your loc with provided name
private def copyFile(file: File, name: String) =
Files.copy(file.toPath(), Paths.get("/tmp/uploaded/", ("copy_" + name)), REPLACE_EXISTING)
// FilePartHandler which returns a File, rather than Play's TemporaryFile class
private def handleFilePartAsFile: FilePartHandler[File] = {
case FileInfo(partName, filename, contentType) =>
val attr = PosixFilePermissions.asFileAttribute(util.EnumSet.of(OWNER_READ, OWNER_WRITE))
val path: Path = Files.createTempFile("multipartBody", "tempFile", attr)
val file = path.toFile
val fileSink: Sink[ByteString, Future[IOResult]] = FileIO.toPath(file.toPath())
val accumulator: Accumulator[ByteString, IOResult] = Accumulator(fileSink)
accumulator.map {
case IOResult(count, status) =>
FilePart(partName, filename, contentType, file)
} (play.api.libs.concurrent.Execution.defaultContext)
}
// The action
def doUpload = Action(parse.multipartFormData(handleFilePartAsFile)) { implicit request =>
val fileOption = request.body.file("file").map {
case FilePart(key, filename, contentType, file) =>
val copy = copyFile(file, filename)
val deleted = deleteTempFile(file) // delete original uploaded file after we have
copy
}
Ok(s"Uploaded: ${fileOption}")
}