Im am writing a Spring MVC @Controller. On a @RequestMapping method I would like to return a View name OR report back a 404 HTTP status code.
How can I continue using Spring View Resolver (for when I need a view) and control response error code without throwing an exception?
just raw draft
//initialised by init
private Map<String, View> viewsMap;
@RequestMapping(value = "/{path}")
@ResponseStatus(HttpStatus.OK)
public View getResponse(HttpServletResponse resp, @PathVariable String path) {
if (viewsMap.get(path ) != null){
return viewsMap.get(path );
}
resp.setStatus(404);
return null;
}
response.setStatus(HttpServletResponse.SC_NOT_FOUND); return null; It does the thing. But somehow it is not yet what I want: return null is hurting me and the response body is blank (different from other 404 responses by Spring). Voting answer as useful.You'd need to implement your own ViewResolver and a View that returns a particular HTTP status code. You can extend InternalResourceViewResolver (or whatever you're using now).
public class MyViewResolver extends InternalResourceViewResolver {
public static final String HTTP_404_VIEW = "http404view";
public View resolveViewName(String viewName, Locale locale) throws Exception {
if (HTTP_404_VIEW.equals(viewName)) {
return new StatusCodeView(404);
}
else
{
return super.resolveViewName(viewName, locale);
}
}
}
public class StatusCodeView implements View
{
private final int code;
public StatusCodeView(int code)
{
this.code = code;
}
public void render(Map model, HttpServletRequest request, HttpServletResponse response)
{
response.sendError(this.code);
}
}
In your controller, just return MyViewResolver.HTTP_404_VIEW.
The best way I found to solve this is using directly the provided View Resolver for both cases. I simply created a view (in my case a .jsp file) for "not found" responses and:
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
return "error/" + HttpServletResponse.SC_NOT_FOUND;
Extra: as there can be different ways to trigger a HTTP error response, I also mapped the error pages in web.xml to have a similar view for same HTTP error code responses.
<error-page>
<error-code>404</error-code>
<location>/WEB-INF/views/error/404.jsp</location>
</error-page>
A little work for what I needed, but it made me set HTTP error handling more accurately in my application.