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== request



=== Purpose


The link:{servletApiRefFromRef}request.html[request] object is an instance of the Servlet API's {jakartaee}jakarta/servlet/http/HttpServletRequest.html[HttpServletRequest] class.


=== Examples


[source,groovy]
----
class BookController {
    def list() {
        log.info "User agent: ${request.getHeader("User-Agent")}"

        render(view: actionName)
    }
}
----


=== Description


The {jakartaee}jakarta/servlet/http/HttpServletRequest.html[HttpServletRequest] class is useful for, amongst other things, obtaining request headers, storing request scoped attributes and establishing information about the client. Refer to the Servlet API's javadocs for further information.

NOTE: The additional methods added to the link:{servletApiRefFromRef}request.html[request] object are documented in the Grails Servlet API reference guide
