Add support for OAuth 2.0 Device Authorization Grant

Closes gh-44

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

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2020-2023 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 sample.web.authentication.DeviceCodeOAuth2AuthorizedClientProvider;
+
+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 Steve Riesenberg
+ * @since 1.1
+ */
+@Configuration
+public class WebClientConfig {
+
+	@Bean
+	public WebClient webClient(OAuth2AuthorizedClientManager authorizedClientManager) {
+		ServletOAuth2AuthorizedClientExchangeFilterFunction oauth2Client =
+				new ServletOAuth2AuthorizedClientExchangeFilterFunction(authorizedClientManager);
+		// @formatter:off
+		return WebClient.builder()
+				.apply(oauth2Client.oauth2Configuration())
+				.build();
+		// @formatter:on
+	}
+
+	@Bean
+	public OAuth2AuthorizedClientManager authorizedClientManager(
+			ClientRegistrationRepository clientRegistrationRepository,
+			OAuth2AuthorizedClientRepository authorizedClientRepository) {
+
+		OAuth2AuthorizedClientProvider authorizedClientProvider =
+				OAuth2AuthorizedClientProviderBuilder.builder()
+						.provider(new DeviceCodeOAuth2AuthorizedClientProvider())
+						.authorizationCode()
+						.refreshToken()
+						.build();
+		DefaultOAuth2AuthorizedClientManager authorizedClientManager =
+				new DefaultOAuth2AuthorizedClientManager(
+						clientRegistrationRepository, authorizedClientRepository);
+		authorizedClientManager.setAuthorizedClientProvider(authorizedClientProvider);
+		// Set a contextAttributesMapper to obtain device_code from the request
+		authorizedClientManager.setContextAttributesMapper(DeviceCodeOAuth2AuthorizedClientProvider
+				.deviceCodeContextAttributesMapper());
+
+		return authorizedClientManager;
+	}
+
+}