Migrate docs to Antora

Issue gh-1295

docs/src/main/java/sample/sociallogin/SecurityConfig.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2020-2022 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 sample.sociallogin;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.MediaType;
+import org.springframework.security.config.Customizer;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.oauth2.server.authorization.config.annotation.web.configuration.OAuth2AuthorizationServerConfiguration;
+import org.springframework.security.oauth2.server.authorization.config.annotation.web.configurers.OAuth2AuthorizationServerConfigurer;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint;
+import org.springframework.security.web.util.matcher.MediaTypeRequestMatcher;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+	@Bean // <1>
+	@Order(1)
+	public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http)
+			throws Exception {
+		OAuth2AuthorizationServerConfiguration.applyDefaultSecurity(http);
+		http.getConfigurer(OAuth2AuthorizationServerConfigurer.class)
+			.oidc(Customizer.withDefaults());	// Enable OpenID Connect 1.0
+		// @formatter:off
+		http
+			// Redirect to the OAuth 2.0 Login endpoint when not authenticated
+			// from the authorization endpoint
+			.exceptionHandling((exceptions) -> exceptions
+				.defaultAuthenticationEntryPointFor( // <2>
+					new LoginUrlAuthenticationEntryPoint("/oauth2/authorization/my-client"),
+					new MediaTypeRequestMatcher(MediaType.TEXT_HTML)
+				)
+			)
+			// Accept access tokens for User Info and/or Client Registration
+			.oauth2ResourceServer((oauth2) -> oauth2.jwt(Customizer.withDefaults()));
+		// @formatter:on
+
+		return http.build();
+	}
+
+	@Bean // <3>
+	@Order(2)
+	public SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http)
+			throws Exception {
+		// @formatter:off
+		http
+			.authorizeHttpRequests((authorize) -> authorize
+				.anyRequest().authenticated()
+			)
+			// OAuth2 Login handles the redirect to the OAuth 2.0 Login endpoint
+			// from the authorization server filter chain
+			.oauth2Login(Customizer.withDefaults()); // <4>
+		// @formatter:on
+
+		return http.build();
+	}
+
+}