How can you get a user's IP in PlayFramework2 ?

Question

For security reasons, sometimes it is needed to block users by IP. In my case, I would like to manage the IP blacklist in a (SQL) database. I guess I can handle the filter p

Answer 1

It's now possible with Play 2.0.2+ : RequestHeader.remoteAddress()

Java :

String ip = request().remoteAddress();

Scala :

Action { request =>
    val ip = request.remoteAddress()
}

Answer 2

If your Play! app is behind nginx (or any other reverse proxy), request.remoteAddress() will only return the IP address of your nginx host. In order to retrieve the real IP of the client you should have the following in your proxy_pass configuration of nginx:

location / {
  proxy_pass        http://play-app:9000;
  proxy_set_header  X-Real-IP  $remote_addr;
}

This will add the client IP as parameter to the header

doc: Nginx

And then within your Play! app you would retrieve it like this:

request.headers.get("X-Real-IP") //In Java
request.headers.get("X-Real-IP") //In Scala

doc: Java, Scala