How to disable curly braces evaluation in URL passed to HttpServletResponse.sendRedirect

Question

I have a URL shortner that should sendRedirect(URL) to URLs specified by users. Sometimes URL contain curly braces like this: http://example.com?someparam={something}.

Instead of sending response 302 to client browser, my Spring MVC app at Tomcat server gives error 404 with no text.

Apparently it's some sort of URL variable evaluation taking place, can I disable it? I could not find docs regarding this feature.

Answer 1

I know this is an old question but I think the OP was looking for a way to prevent Spring from doing variable replacement in redirect URL

I faced the exact same issue and the fix was using RedirectView and in RedirectView you can set setExpandUriTemplateVariables(false)

that made it redirect to the url given exactly without Spring trying to replace anything in it

here is how the code looks like

        RedirectView redirect = new RedirectView(redirectUrl);
        redirect.setExpandUriTemplateVariables(false);
        return new ModelAndView(redirect);

Hope that helps