Question

Currently I am able to get the host from the request, which includes domain and optional port. Unfortunately, it does not include the protocol (http vs https), so I cannot create absolute urls to the site itself.

object Application extends Controller {
  def index = Action { request =>
    Ok(request.host + "/some/path") // Returns "localhost:9000/some/path"
  }
}

Is there any way to get the protocol from the request object?

Answer 1

Actually your portnumber will give you if it’s http or https.

Start your Play server with https support JAVA_OPTS=-Dhttps.port=9001 play start

Here’s a code snippet (you can make the validation more stable with a regex, take the https port number from properties …)

def path = Action { request =>
    val path = 
      if(request.host.contains(":9000"))
        "http://" + request.host + "/some/path"
      else
        "https://" + request.host + "/some/path"
    Ok(path)
  }

The code will return

http://ServerIp:9000/some/path if it's thru http
https://ServerIp:9001/some/path if it's thru https