spring security oauth2认证中心 ClientDetailsServiceConfiguration自动配置源码

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
// 导入认证服务器端点配置和安全配置
@Import({AuthorizationServerEndpointsConfiguration.class, AuthorizationServerSecurityConfiguration.class})
public @interface EnableAuthorizationServer {

}

@Configuration
public class ClientDetailsServiceConfiguration {

	@SuppressWarnings("rawtypes")
	private ClientDetailsServiceConfigurer configurer = new ClientDetailsServiceConfigurer(new ClientDetailsServiceBuilder());
	
	// 注册客户端信息服务配置器
	@Bean
	public ClientDetailsServiceConfigurer clientDetailsServiceConfigurer() {
		return configurer;
	}
    // 构建并注册客户端服务(懒加载和动态代理模式，保证在使用时客户端信息服务配置器已经完成配置)
	@Bean
	@Lazy
	@Scope(proxyMode=ScopedProxyMode.INTERFACES)
	public ClientDetailsService clientDetailsService() throws Exception {
		return configurer.and().build();
	}

}

@Configuration
@Order(0)
@Import({ ClientDetailsServiceConfiguration.class, AuthorizationServerEndpointsConfiguration.class })
public class AuthorizationServerSecurityConfiguration extends WebSecurityConfigurerAdapter {
 
    // 注入客制化的认证服务器配置
	@Autowired
	private List<AuthorizationServerConfigurer> configurers = Collections.emptyList();

    // 注入客户端服务(动态代理)
	@Autowired
	private ClientDetailsService clientDetailsService;

	@Autowired
	private AuthorizationServerEndpointsConfiguration endpoints;

    // 自动注入客户端信息配置器，并合并客制化配置
	@Autowired
	public void configure(ClientDetailsServiceConfigurer clientDetails) throws Exception {
		for (AuthorizationServerConfigurer configurer : configurers) {
			configurer.configure(clientDetails);
		}
	}

	@Override
	protected void configure(AuthenticationManagerBuilder auth) throws Exception {
		// Over-riding to make sure this.disableLocalConfigureAuthenticationBldr = false
		// This will ensure that when this configurer builds the AuthenticationManager it will not attempt
		// to find another 'Global' AuthenticationManager in the ApplicationContext (if available),
		// and set that as the parent of this 'Local' AuthenticationManager.
		// This AuthenticationManager should only be wired up with an AuthenticationProvider
		// composed of the ClientDetailsService (wired in this configuration) for authenticating 'clients' only.
	}

	@Override
	protected void configure(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");
		if (!endpoints.getEndpointsConfigurer().isUserDetailsServiceOverride()) {
			UserDetailsService userDetailsService = http.getSharedObject(UserDetailsService.class);
			endpoints.getEndpointsConfigurer().userDetailsService(userDetailsService);
		}
		// @formatter:off
		http
        	.authorizeRequests()
            	.antMatchers(tokenEndpointPath).fullyAuthenticated()
            	.antMatchers(tokenKeyPath).access(configurer.getTokenKeyAccess())
            	.antMatchers(checkTokenPath).access(configurer.getCheckTokenAccess())
        .and()
        	.requestMatchers()
            	.antMatchers(tokenEndpointPath, tokenKeyPath, checkTokenPath)
        .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);
		}
	}

}

public class ClientDetailsServiceConfigurer extends
		SecurityConfigurerAdapter<ClientDetailsService, ClientDetailsServiceBuilder<?>> {

	public ClientDetailsServiceConfigurer(ClientDetailsServiceBuilder<?> builder) {
		setBuilder(builder);
	}
    // 配置客制的客户端信息服务
	public ClientDetailsServiceBuilder<?> withClientDetails(ClientDetailsService clientDetailsService) throws Exception {
		setBuilder(getBuilder().clients(clientDetailsService));
		return this.and();
	}
    // 配置内存数据
	public InMemoryClientDetailsServiceBuilder inMemory() throws Exception {
		InMemoryClientDetailsServiceBuilder next = getBuilder().inMemory();
		setBuilder(next);
		return next;
	}
	// 配置JDBC数据源
	public JdbcClientDetailsServiceBuilder jdbc(DataSource dataSource) throws Exception {
		JdbcClientDetailsServiceBuilder next = getBuilder().jdbc().dataSource(dataSource);
		setBuilder(next);
		return next;
	}
	
	@Override
	public void init(ClientDetailsServiceBuilder<?> builder) throws Exception {
	}

	@Override
	public void configure(ClientDetailsServiceBuilder<?> builder) throws Exception {
	}

}