Happstack: Request

Request

A Request represents an HTTP request. This generally means that a user is either asking for data from the server, or trying to give data to the server.

In the server, we can ask for the request with the ServerMonad method askRq. Here is a simple example:

reqExample :: ServerPartT IO Response
reqExample = do req <- askRq
                ok $ toResponse $ show req

This example can be run in Happstack with the following main method:

code :: String
code = "example"

main :: IO ()
main = do simpleHTTP nullConf $
          msum [ dir code $ reqExample
               ]

Now, let's run the example. When the server is running, we can now visit the page http://localhost:8000/example/.

What we now see is the request that you just made in its entirety!

Look here to see which methods we can use to dissect a request.