Modify @RequestBody object in Controller From Filter

I want to modify an object that has already been populated with JacksonMapper and add the IP and Referrer URL to it automatically, but the request i开发者_StackOverflows always null because it isn't found in the attributes array. Am I doing something wrong?

ApiController.java

@RequestMapping(value="/member/follow")
    public @ResponseBody IHttpResponse follow(@RequestBody FollowRequest request) {
        return request.getHttpResponse();
    }

ApiRequestWrapper.js

public class ApiRequestWrapper extends HttpServletRequestWrapper
{
    public ApiRequestWrapper(HttpServletRequest request) {
        super(request);

        if(this.getAttribute("request") instanceof IHttpRequest)
        {
            IHttpRequest httpRequest = (IHttpRequest) this.getAttribute("request");

            if(httpRequest != null)
            {
                httpRequest.setIp(request.getRemoteAddr());
                httpRequest.setReferrer(request.getLocalName());
            }
        }
    }
}

Web.xml

<filter>
    <filter-name>apiFilter</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
    <filter-name>apiFilter</filter-name>
    <url-pattern>/api/*</url-pattern>
</filter-mapping>

The object corresponding to the RequestBody is created just before the method is invoked - there is no way to get hold of it in the filter. You can achieve what you want to do by implementing an Aspect.