core/play/src/main/java/play/mvc/Call.java
public String absoluteURL(Http.Request request) {
    return absoluteURL(request.secure(), request.host());
  }
public String absoluteURL(Http.Request request) {
    return absoluteURL(request.secure(), request.host());
  }
Transform this call to an absolute URL.

@param request used to identify the host and protocol that should base this absolute URL
@return the absolute URL string