We finally got this working [Coded by one of my colleague]:-
public class CustomErrorFilter extends ZuulFilter {
private static final Logger LOG = LoggerFactory.getLogger(CustomErrorFilter.class);
@Override
public String filterType() {
return "post";
}
@Override
public int filterOrder() {
return -1; // Needs to run before SendErrorFilter which has filterOrder == 0
}
@Override
public boolean shouldFilter() {
// only forward to errorPath if it hasn't been forwarded to already
return RequestContext.getCurrentContext().containsKey("error.status_code");
}
@Override
public Object run() {
try {
RequestContext ctx = RequestContext.getCurrentContext();
Object e = ctx.get("error.exception");
if (e != null && e instanceof ZuulException) {
ZuulException zuulException = (ZuulException)e;
LOG.error("Zuul failure detected: " + zuulException.getMessage(), zuulException);
// Remove error code to prevent further error handling in follow up filters
ctx.remove("error.status_code");
// Populate context with new response values
ctx.setResponseBody(“Overriding Zuul Exception Body”);
ctx.getResponse().setContentType("application/json");
ctx.setResponseStatusCode(500); //Can set any error code as excepted
}
}
catch (Exception ex) {
LOG.error("Exception filtering in custom error filter", ex);
ReflectionUtils.rethrowRuntimeException(ex);
}
return null;
}
}