/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.gravitee.am.gateway.handler.oauth2;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.oauth2.config.annotation.configuration.ClientDetailsServiceConfiguration;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerEndpointsConfiguration;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerSecurityConfigurer;
import org.springframework.security.oauth2.provider.ClientDetailsService;
import org.springframework.security.oauth2.provider.endpoint.FrameworkEndpointHandlerMapping;

import java.util.Collections;
import java.util.List;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
@Configuration
@Order(0)
@Import({ ClientDetailsServiceConfiguration.class, CustomAuthorizationServerEndpointsConfiguration.class })
public class CustomAuthorizationServerSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Autowired
    private List<AuthorizationServerConfigurer> configurers = Collections.emptyList();

    @Autowired
    private ClientDetailsService clientDetailsService;

    @Autowired
    private AuthorizationServerEndpointsConfiguration endpoints;

    @Autowired
    public void configure(ClientDetailsServiceConfigurer clientDetails) throws Exception {
        for (AuthorizationServerConfigurer configurer : configurers) {
            configurer.configure(clientDetails);
        }
    }

    @Override
    protected void configure(final HttpSecurity http) throws Exception {
        AuthorizationServerSecurityConfigurer configurer = new AuthorizationServerSecurityConfigurer();
        FrameworkEndpointHandlerMapping handlerMapping = endpoints.oauth2EndpointHandlerMapping();
        http.setSharedObject(FrameworkEndpointHandlerMapping.class, handlerMapping);
        configure(configurer);
        http.apply(configurer);
        String tokenEndpointPath = handlerMapping.getServletPath("/oauth/token");
        String tokenKeyPath = handlerMapping.getServletPath("/oauth/token_key");
        String checkTokenPath = handlerMapping.getServletPath("/oauth/check_token");
        String revokeTokenPath = handlerMapping.getServletPath("/oauth/revoke");
        if (!endpoints.getEndpointsConfigurer().isUserDetailsServiceOverride()) {
            UserDetailsService userDetailsService = http.getSharedObject(UserDetailsService.class);
            endpoints.getEndpointsConfigurer().userDetailsService(userDetailsService);
        }
        // @formatter:off
        http
                .authorizeRequests()
                // Per the OAuth2 spec, we should only allow POST to the token endpoint.
                // See: https://github.com/spring-projects/spring-security-oauth/issues/327
                .antMatchers(HttpMethod.GET, tokenEndpointPath).denyAll()
                .antMatchers(HttpMethod.PUT, tokenEndpointPath).denyAll()
                .antMatchers(HttpMethod.PATCH, tokenEndpointPath).denyAll()
                .antMatchers(HttpMethod.DELETE, tokenEndpointPath).denyAll()
                .and()
                .authorizeRequests()
                .antMatchers(tokenEndpointPath).fullyAuthenticated()
                .antMatchers(tokenKeyPath).access(configurer.getTokenKeyAccess())
                .antMatchers(checkTokenPath).access(configurer.getCheckTokenAccess())
                .antMatchers(revokeTokenPath).access(configurer.getCheckTokenAccess())
                .and()
                .requestMatchers()
                .antMatchers(tokenEndpointPath, tokenKeyPath, checkTokenPath, revokeTokenPath)
                .and()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.NEVER);
        // @formatter:on
        http.setSharedObject(ClientDetailsService.class, clientDetailsService);
    }

    protected void configure(AuthorizationServerSecurityConfigurer oauthServer) throws Exception {
        for (AuthorizationServerConfigurer configurer : configurers) {
            configurer.configure(oauthServer);
        }
    }
}

@@ -4548,32 +4548,99 @@
 orizeRequests()%0A
+                .antMatchers(HttpMethod.OPTIONS, %22**%22).permitAll()%0A
                 

fix OPTIONS preflight request