How to get all request parameters in Play and Scala

Question

 case GET(Path("/rtb_v1/bidrequest")) => Action {  implicit request =>

I want to take the request object above and get all of the key/value pairs sent in the form post and flatten it into a Map[String,String]

i have gone through all the documents and am at a dead end.

This is pretty freaking easy in Java/Servlets I;m wondering why there is no documentation on a simple thing like this anywhere..

Map<String, String[]> parameters = request.getParameterMap();

score 27 · Accepted Answer · answered Nov 13 '12 at 05:32

27

Play's equivalent of request.getParamterMap is request.queryString, which returns a Map[String, Seq[String]]. You can flatten it to a Map[String, String] with

request.queryString.map { case (k,v) => k -> v.mkString }

And here is the documentation.

answered Nov 13 '12 at 05:32

Kim Stebel

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works.. i like this code its a little more expressive than flatmap solutions – Ryan Medlin Nov 13 '12 at 23:01
Can you assign now the queryString to another request and how? – Todor Kolev Jun 29 '15 at 13:47
wow.. I am new to scala, would you mind explaining how your `map` `case` can return a `map[string, string]`? – Zennichimaro Sep 26 '17 at 11:40

score 9 · Answer 2 · answered Nov 13 '12 at 05:46

9

As an alternative to the way that Kim does it, I personally use a function like..

def param(field: String): Option[String] = 
  request.queryString.get(field).flatMap(_.headOption)

answered Nov 13 '12 at 05:46

Ivan Meredith

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score 2 · Answer 3 · answered Jul 04 '14 at 15:42

It won't work if request is using POST method. Following code can be used:

req.body match {
  case AnyContentAsFormUrlEncoded(params) ⇒
    println(s"urlEncoded = $params")
  case mp @ AnyContentAsMultipartFormData(_) ⇒
    println(s"multipart = ${mp.asFormUrlEncoded}")
}

score 0 · Answer 4 · answered Mar 17 '15 at 16:03

0

You might have to use the following:

request.queryString.map { case (k,v) => k -> v.mkString }).toSeq: _*

answered Mar 17 '15 at 16:03

Louis Querel

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How to get all request parameters in Play and Scala

4 Answers4