Writing a test case for file uploads in Play 2.1 and Scala

Question

I found the following question/answer:

Test MultipartFormData in Play 2.0 FakeRequest

But it seems things have changed in Play 2.1. I\'ve tried adapting the

Answer 1

Here's my version of Writeable[AnyContentAsMultipartFormData]:

import java.io.File

import play.api.http.{HeaderNames, Writeable}
import play.api.libs.Files.TemporaryFile
import play.api.mvc.MultipartFormData.FilePart
import play.api.mvc.{AnyContentAsMultipartFormData, Codec, MultipartFormData}

object MultipartFormDataWritable {
  val boundary = "--------ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"

  def formatDataParts(data: Map[String, Seq[String]]) = {
    val dataParts = data.flatMap { case (key, values) =>
      values.map { value =>
        val name = s""""$key""""
        s"--$boundary\r\n${HeaderNames.CONTENT_DISPOSITION}: form-data; name=$name\r\n\r\n$value\r\n"
      }
    }.mkString("")
    Codec.utf_8.encode(dataParts)
  }

  def filePartHeader(file: FilePart[TemporaryFile]) = {
    val name = s""""${file.key}""""
    val filename = s""""${file.filename}""""
    val contentType = file.contentType.map { ct =>
      s"${HeaderNames.CONTENT_TYPE}: $ct\r\n"
    }.getOrElse("")
    Codec.utf_8.encode(s"--$boundary\r\n${HeaderNames.CONTENT_DISPOSITION}: form-data; name=$name; filename=$filename\r\n$contentType\r\n")
  }

  val singleton = Writeable[MultipartFormData[TemporaryFile]](
    transform = { form: MultipartFormData[TemporaryFile] =>
      formatDataParts(form.dataParts) ++
        form.files.flatMap { file =>
          val fileBytes = Files.readAllBytes(Paths.get(file.ref.file.getAbsolutePath))
          filePartHeader(file) ++ fileBytes ++ Codec.utf_8.encode("\r\n")
        } ++
        Codec.utf_8.encode(s"--$boundary--")
    },
    contentType = Some(s"multipart/form-data; boundary=$boundary")
  )
}

implicit val anyContentAsMultipartFormWritable: Writeable[AnyContentAsMultipartFormData] = {
  MultipartFormDataWritable.singleton.map(_.mdf)
}

It's adapted from (and some bugs fixed): https://github.com/jroper/playframework/blob/multpart-form-data-writeable/framework/src/play/src/main/scala/play/api/http/Writeable.scala#L108

See the whole post here, if you are interested: http://tech.fongmun.com/post/125479939452/test-multipartformdata-in-play