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== response



=== Purpose


The {grailsdocs}ref/Servlet%20API/response.html[response] object is an instance of the Servlet API's {javaee}javax/servlet/http/HttpServletResponse.html[HttpServletResponse] class


=== Examples


[source,groovy]
----
class BookController {
    def downloadFile() {
        byte[] bytes = // read bytes
        response.outputStream << bytes
    }
}
----


=== Description


The Servlet API's `HttpServletResponse` class can be used within Grails to perform all typical activities such as writing out binary data, writing directly to the response and sending error response codes to name but a few. Refer to the documentation on the {javaee}javax/servlet/http/HttpServletResponse.html[HttpServletResponse] class in the Servlet API for more information.

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