(Quick Reference) ## response ### Purpose The response object is an instance of the Servlet API’s HttpServletResponse class. ### Examples
    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 HttpServletResponse class in the Servlet API for more information.
| The additional methods added to the response object are documented in the Grails Servlet API reference guide
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