Easy way to decode a base64 in Scala

decodeBase64.scala

  import org.apache.commons.codec.binary.Base64
  val base64 = "data:([a-z]+);base64,(.*)".r
  def decodeBase64 (src: String): Option[(String, Array[Byte])] = {
    src match {
      case base64(mimetype, data) => Some( (mimetype, Base64.decodeBase64(data.getBytes("utf-8"))) )
      case _ => None
    }
  }

Sorry but isn't your regex wrong?

Something like this:

"data":"data:image/jpeg;base64,/9j/4AAQSkZJRgABAgAAZABkAAD..."

is never caught,because "image/jpeg" is not matched by [a-z].