if (getFilter(DefaultLoginPageGeneratingFilter.class, filters) != null) {
logger.debug("Default generated login page is in use");
return;
}
FilterSecurityInterceptor fsi = getFilter(FilterSecurityInterceptor.class, filters);
FilterInvocationSecurityMetadataSource fids =
fsi.getSecurityMetadataSource();
Collection<ConfigAttribute> attributes = fids.getAttributes(loginRequest);
if (attributes == null) {
logger.debug("No access attributes defined for login page URL");
if (fsi.isRejectPublicInvocations()) {
logger.warn("FilterSecurityInterceptor is configured to reject public invocations." +
" Your login page may not be accessible.");
}
return;
}
AnonymousAuthenticationFilter anonPF = getFilter(AnonymousAuthenticationFilter.class, filters);
if (anonPF == null) {
logger.warn("The login page is being protected by the filter chain, but you don't appear to have" +
" anonymous authentication enabled. This is almost certainly an error.");
return;
}
// Simulate an anonymous access with the supplied attributes.
AnonymousAuthenticationToken token = new AnonymousAuthenticationToken("key", anonPF.getPrincipal(),
anonPF.getAuthorities());
try {
fsi.getAccessDecisionManager().decide(token, loginRequest, attributes);
} catch (AccessDeniedException e) {
logger.warn("Anonymous access to the login page doesn't appear to be enabled. This is almost certainly " +
"an error. Please check your configuration allows unauthenticated access to the configured " +
"login page. (Simulated access was rejected: " + e + ")");
} catch (Exception e) {