How to view custom 404 page in Dropwizard
Question
can anyone point me how to view my custom 404 page. I googled and tried implementing ExceptionMapper<RuntimeException> but this did not work fully. I'm using 0.8.1 version
My Exception mapper:
public class RuntimeExceptionMapper implements ExceptionMapper<NotFoundException> {
@Override
public Response toResponse(NotFoundException exception) {
Response defaultResponse = Response.status(Status.OK)
.entity(JsonUtils.getErrorJson("default response"))
.build();
return defaultResponse;
}
}
This only works on incorrect APIs and not on resource calls
My Setup :
@Override
public void initialize(Bootstrap<WebConfiguration> bootstrap) {
bootstrap.addBundle(new AssetsBundle("/webapp", "/", "index.html"));
}
@Override
public void run(WebConfiguration configuration, Environment environment) throws Exception {
environment.jersey().register(RuntimeExceptionMapper.class);
((AbstractServerFactory) configuration.getServerFactory()).setJerseyRootPath("/api/*");
// Registering Resources
environment.jersey().register(new AuditResource(auditDao));
....
}
Now,
http://localhost:8080/api/rubish goes through overridden ExceptionMapper method http://localhost:8080/rubish.html results in default 404 page
How do i setup so that whenever unknown pages are requested dropwizard will show up a custom 404 page
I refereed this link for the exception mapper
2 answers
solution1
2 ACCPTED 2017-07-28 18:04:12
To configure a custom error page for any error, you can configure an ErrorPageErrorHandler in your Application like this:
@Override
public void run(final MonolithConfiguration config,
final Environment env) {
ErrorPageErrorHandler eph = new ErrorPageErrorHandler();
eph.addErrorPage(404, "/error/404");
env.getApplicationContext().setErrorHandler(eph);
}
Then create a resource like this:
@Path("/error")
public class ErrorResource {
@GET
@Path("404")
@Produces(MediaType.TEXT_HTML)
public Response error404() {
return Response.status(Response.Status.NOT_FOUND)
.entity("<html><body>Error 404 requesting resource.</body></html>")
.build();
}
Just in case you need it, here's the import for ErrorPageErrorHandler as well:
import org.eclipse.jetty.servlet.ErrorPageErrorHandler;
solution2
1 2016-02-22 17:35:01
If I understand it right, what you want is to serve a custom 404 page for unmatched resource requests. To do this you could write a separate resource class and in it a separate resource method. This resource method should have an
@Path("/{default: .*}")
annotation. This resource method catches unmatched resource requests. In this method you can serve your own custom view.
Look at the below code snippet for clarity,
@Path("/")
public class DefaultResource {
/**
* Default resource method which catches unmatched resource requests. A page not found view is
* returned.
*/
@Path("/{default: .*}")
@GET
public View defaultMethod() throws URISyntaxException {
// Return a page not found view.
ViewService viewService = new ViewService();
View pageNotFoundView = viewService.getPageNotFoundView();
return pageNotFoundView;
}
}
You can refer to this if you are unaware of how to serve static assets using dropwizard or ask me.
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