Spring Rest Controller returns XML instead of JSON after Jasperreports update

Question

I have a Spring boot project with version 2.6.4. And after I updated the jasperreports dependency to 6.19.0 all my RestControllers returns now XML instead of JSON Where can I change this, without changing to

@GetMapping(produces = {"application/json"})

on each method?

Answer 1

I just have same issue today, I checked with Chrome and saw it doesn't add application/json in Accept header. My solution is create a wrapper filter:

@Component
public class JsonRequestHeaderFilter implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequestWrapper requestWrapper = new HttpServletRequestWrapper((HttpServletRequest) request) {
            @Override
            public Enumeration<String> getHeaders(String name) {
                if (name.equals("Accept")) {
                    Set<String> customHeaders = new HashSet<String>();
                    Enumeration<String> curHeaders = super.getHeaders(name);
                    while (curHeaders.hasMoreElements()) {
                        String header = curHeaders.nextElement();
                        customHeaders.add(MediaType.APPLICATION_JSON_VALUE.concat(";").concat(header));
                    }

                    return Collections.enumeration(customHeaders);
                }
                return super.getHeaders(name);
            }
        };

        chain.doFilter(requestWrapper, response);
    }
}