Ajax file upload with Play 2.0: exists but replace parameter is false

Question

I'm implementing Ajax file upload with Valum on the client side and Play! 2.0.4 on the server side. My action method looks like this:

  def ajaxup = Action(parse.temporaryFile) { request =>
    try {
      request.body.moveTo(new File("/somepath/foo.jpg"))
    } catch {
      case e: Exception => Logger.error(e.getMessage)
    }
    Ok("File uploaded")
  }

The upload works fine, that is, the file is correctly saved under the name foo.jpg on /somepath/. But it also throws the exception:

Path(/somepath/foo.jpg) exists but replace parameter is false

How can I avoid that? Do I need set any property on the file I'm creating?

Answer 1

I assume that you want to overwrite the existing file /somepath/foo.jpg. In case you don't, just check before if that file already exists.

Anyway, the error message already gave you a hint. Look at the documentation for the TemporaryFile case class. The moveTo method can have 2 parameters; the second one defaults to false and indicates that you want to replace an existing file.

So, in short, instead of

request.body.moveTo(new File("/somepath/foo.jpg"))

you write

request.body.moveTo(new File("/somepath/foo.jpg"), true)

Answer 2

From the moveTo() API doc, to replace the file, you should use:

request.body.moveTo(new File("/somepath/foo.jpg"), true)