How to log request/response in lift

Question

I have a lift project in which
there is a class extending RestHelper that looks like this

   serve{
        "api" / "mystuff" prefix {
         case a => ...
         case b => ...
          }
    }

How can i log all the requests(including POST parameters) and responses without adding it to each case statement?

Answer 1

To log the requests you can use LiftRules.statelessRewrite (in bootstrap.liftweb.Boot):

LiftRules.statelessRewrite.append {
   case RewriteRequest(ParsePath("api" :: key :: Nil, "", true, _), _, _) =>
      log.info("REST: %s" format key)
      RewriteResponse("api" :: key :: Nil,true)
}

That will be intercepted before the following rest server:

case "api":: key :: Nil Get _ => {
  val email = S.param("email") getOrElse {
    "missing email parameter"
  }
  Full(PlainTextResponse("succeeded: %s, %s" format (key,email)))
}

Note that url params are kept.

To log the responses you use LiftRules.afterSend

UPDATE:

Using afterSend you can actually access both request and response.