Restructure samples

Closes gh-485

samples/messages-client/src/main/java/sample/MessagesClientApplication.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2020-2021 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;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author Joe Grandja
+ * @since 0.0.1
+ */
+@SpringBootApplication
+public class MessagesClientApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(MessagesClientApplication.class, args);
+	}
+
+}

samples/messages-client/src/main/java/sample/config/SecurityConfig.java

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+/*
+ * Copyright 2020-2021 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.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityCustomizer;
+import org.springframework.security.web.SecurityFilterChain;
+
+import static org.springframework.security.config.Customizer.withDefaults;
+
+/**
+ * @author Joe Grandja
+ * @since 0.0.1
+ */
+@EnableWebSecurity
+public class SecurityConfig {
+
+	@Bean
+	WebSecurityCustomizer webSecurityCustomizer() {
+		return (web) -> web.ignoring().antMatchers("/webjars/**");
+	}
+
+	// @formatter:off
+	@Bean
+	SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+		http
+			.authorizeRequests(authorizeRequests ->
+				authorizeRequests.anyRequest().authenticated()
+			)
+			.oauth2Login(oauth2Login ->
+				oauth2Login.loginPage("/oauth2/authorization/messaging-client-oidc"))
+			.oauth2Client(withDefaults());
+		return http.build();
+	}
+	// @formatter:on
+
+}

samples/messages-client/src/main/java/sample/config/WebClientConfig.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2020 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.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.oauth2.client.OAuth2AuthorizedClientManager;
+import org.springframework.security.oauth2.client.OAuth2AuthorizedClientProvider;
+import org.springframework.security.oauth2.client.OAuth2AuthorizedClientProviderBuilder;
+import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
+import org.springframework.security.oauth2.client.web.DefaultOAuth2AuthorizedClientManager;
+import org.springframework.security.oauth2.client.web.OAuth2AuthorizedClientRepository;
+import org.springframework.security.oauth2.client.web.reactive.function.client.ServletOAuth2AuthorizedClientExchangeFilterFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+
+/**
+ * @author Joe Grandja
+ * @since 0.0.1
+ */
+@Configuration
+public class WebClientConfig {
+
+	@Bean
+	WebClient webClient(OAuth2AuthorizedClientManager authorizedClientManager) {
+		ServletOAuth2AuthorizedClientExchangeFilterFunction oauth2Client =
+				new ServletOAuth2AuthorizedClientExchangeFilterFunction(authorizedClientManager);
+		return WebClient.builder()
+				.apply(oauth2Client.oauth2Configuration())
+				.build();
+	}
+
+	@Bean
+	OAuth2AuthorizedClientManager authorizedClientManager(
+			ClientRegistrationRepository clientRegistrationRepository,
+			OAuth2AuthorizedClientRepository authorizedClientRepository) {
+
+		OAuth2AuthorizedClientProvider authorizedClientProvider =
+				OAuth2AuthorizedClientProviderBuilder.builder()
+						.authorizationCode()
+						.refreshToken()
+						.clientCredentials()
+						.build();
+		DefaultOAuth2AuthorizedClientManager authorizedClientManager = new DefaultOAuth2AuthorizedClientManager(
+				clientRegistrationRepository, authorizedClientRepository);
+		authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider);
+
+		return authorizedClientManager;
+	}
+}

samples/messages-client/src/main/java/sample/web/AuthorizationController.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2020 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.web;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
+import org.springframework.security.oauth2.client.annotation.RegisteredOAuth2AuthorizedClient;
+import org.springframework.security.oauth2.core.OAuth2Error;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.util.StringUtils;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.reactive.function.client.WebClient;
+
+import javax.servlet.http.HttpServletRequest;
+
+import static org.springframework.security.oauth2.client.web.reactive.function.client.ServletOAuth2AuthorizedClientExchangeFilterFunction.clientRegistrationId;
+import static org.springframework.security.oauth2.client.web.reactive.function.client.ServletOAuth2AuthorizedClientExchangeFilterFunction.oauth2AuthorizedClient;
+
+/**
+ * @author Joe Grandja
+ * @since 0.0.1
+ */
+@Controller
+public class AuthorizationController {
+	private final WebClient webClient;
+	private final String messagesBaseUri;
+
+	public AuthorizationController(WebClient webClient,
+			@Value("${messages.base-uri}") String messagesBaseUri) {
+		this.webClient = webClient;
+		this.messagesBaseUri = messagesBaseUri;
+	}
+
+	@GetMapping(value = "/authorize", params = "grant_type=authorization_code")
+	public String authorizationCodeGrant(Model model,
+			@RegisteredOAuth2AuthorizedClient("messaging-client-authorization-code")
+					OAuth2AuthorizedClient authorizedClient) {
+
+		String[] messages = this.webClient
+				.get()
+				.uri(this.messagesBaseUri)
+				.attributes(oauth2AuthorizedClient(authorizedClient))
+				.retrieve()
+				.bodyToMono(String[].class)
+				.block();
+		model.addAttribute("messages", messages);
+
+		return "index";
+	}
+
+	// '/authorized' is the registered 'redirect_uri' for authorization_code
+	@GetMapping(value = "/authorized", params = OAuth2ParameterNames.ERROR)
+	public String authorizationFailed(Model model, HttpServletRequest request) {
+		String errorCode = request.getParameter(OAuth2ParameterNames.ERROR);
+		if (StringUtils.hasText(errorCode)) {
+			model.addAttribute("error",
+					new OAuth2Error(
+							errorCode,
+							request.getParameter(OAuth2ParameterNames.ERROR_DESCRIPTION),
+							request.getParameter(OAuth2ParameterNames.ERROR_URI))
+			);
+		}
+
+		return "index";
+	}
+
+	@GetMapping(value = "/authorize", params = "grant_type=client_credentials")
+	public String clientCredentialsGrant(Model model) {
+
+		String[] messages = this.webClient
+				.get()
+				.uri(this.messagesBaseUri)
+				.attributes(clientRegistrationId("messaging-client-client-credentials"))
+				.retrieve()
+				.bodyToMono(String[].class)
+				.block();
+		model.addAttribute("messages", messages);
+
+		return "index";
+	}
+}

samples/messages-client/src/main/java/sample/web/DefaultController.java

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+/*
+ * Copyright 2020 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.web;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * @author Joe Grandja
+ * @since 0.0.1
+ */
+@Controller
+public class DefaultController {
+
+	@GetMapping("/")
+	public String root() {
+		return "redirect:/index";
+	}
+
+	@GetMapping("/index")
+	public String index() {
+		return "index";
+	}
+}