OAuth2AuthorizedClientManager implementation works outside of request

Fixes gh-6780

Author: jgrandja

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/AuthorizedClientServiceOAuth2AuthorizedClientManager.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright 2002-2019 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 org.springframework.security.oauth2.client;
+
+import org.springframework.lang.Nullable;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.oauth2.client.registration.ClientRegistration;
+import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+/**
+ * An implementation of an {@link OAuth2AuthorizedClientManager}
+ * that is capable of operating outside of a {@code HttpServletRequest} context,
+ * e.g. in a scheduled/background thread and/or in the service-tier.
+ *
+ * @author Joe Grandja
+ * @since 5.2
+ * @see OAuth2AuthorizedClientManager
+ * @see OAuth2AuthorizedClientProvider
+ * @see OAuth2AuthorizedClientService
+ */
+public final class AuthorizedClientServiceOAuth2AuthorizedClientManager implements OAuth2AuthorizedClientManager {
+	private final ClientRegistrationRepository clientRegistrationRepository;
+	private final OAuth2AuthorizedClientService authorizedClientService;
+	private OAuth2AuthorizedClientProvider authorizedClientProvider = context -> null;
+	private Function<OAuth2AuthorizeRequest, Map<String, Object>> contextAttributesMapper = new DefaultContextAttributesMapper();
+
+	/**
+	 * Constructs an {@code AuthorizedClientServiceOAuth2AuthorizedClientManager} using the provided parameters.
+	 *
+	 * @param clientRegistrationRepository the repository of client registrations
+	 * @param authorizedClientService the authorized client service
+	 */
+	public AuthorizedClientServiceOAuth2AuthorizedClientManager(ClientRegistrationRepository clientRegistrationRepository,
+																OAuth2AuthorizedClientService authorizedClientService) {
+		Assert.notNull(clientRegistrationRepository, "clientRegistrationRepository cannot be null");
+		Assert.notNull(authorizedClientService, "authorizedClientService cannot be null");
+		this.clientRegistrationRepository = clientRegistrationRepository;
+		this.authorizedClientService = authorizedClientService;
+	}
+
+	@Nullable
+	@Override
+	public OAuth2AuthorizedClient authorize(OAuth2AuthorizeRequest authorizeRequest) {
+		Assert.notNull(authorizeRequest, "authorizeRequest cannot be null");
+
+		String clientRegistrationId = authorizeRequest.getClientRegistrationId();
+		OAuth2AuthorizedClient authorizedClient = authorizeRequest.getAuthorizedClient();
+		Authentication principal = authorizeRequest.getPrincipal();
+
+		OAuth2AuthorizationContext.Builder contextBuilder;
+		if (authorizedClient != null) {
+			contextBuilder = OAuth2AuthorizationContext.withAuthorizedClient(authorizedClient);
+		} else {
+			ClientRegistration clientRegistration = this.clientRegistrationRepository.findByRegistrationId(clientRegistrationId);
+			Assert.notNull(clientRegistration, "Could not find ClientRegistration with id '" + clientRegistrationId + "'");
+			authorizedClient = this.authorizedClientService.loadAuthorizedClient(clientRegistrationId, principal.getName());
+			if (authorizedClient != null) {
+				contextBuilder = OAuth2AuthorizationContext.withAuthorizedClient(authorizedClient);
+			} else {
+				contextBuilder = OAuth2AuthorizationContext.withClientRegistration(clientRegistration);
+			}
+		}
+		OAuth2AuthorizationContext authorizationContext = contextBuilder
+				.principal(principal)
+				.attributes(this.contextAttributesMapper.apply(authorizeRequest))
+				.build();
+
+		authorizedClient = this.authorizedClientProvider.authorize(authorizationContext);
+		if (authorizedClient != null) {
+			this.authorizedClientService.saveAuthorizedClient(authorizedClient, principal);
+		} else {
+			// In the case of re-authorization, the returned `authorizedClient` may be null if re-authorization is not supported.
+			// For these cases, return the provided `authorizationContext.authorizedClient`.
+			if (authorizationContext.getAuthorizedClient() != null) {
+				return authorizationContext.getAuthorizedClient();
+			}
+		}
+
+		return authorizedClient;
+	}
+
+	/**
+	 * Sets the {@link OAuth2AuthorizedClientProvider} used for authorizing (or re-authorizing) an OAuth 2.0 Client.
+	 *
+	 * @param authorizedClientProvider the {@link OAuth2AuthorizedClientProvider} used for authorizing (or re-authorizing) an OAuth 2.0 Client
+	 */
+	public void setAuthorizedClientProvider(OAuth2AuthorizedClientProvider authorizedClientProvider) {
+		Assert.notNull(authorizedClientProvider, "authorizedClientProvider cannot be null");
+		this.authorizedClientProvider = authorizedClientProvider;
+	}
+
+	/**
+	 * Sets the {@code Function} used for mapping attribute(s) from the {@link OAuth2AuthorizeRequest} to a {@code Map} of attributes
+	 * to be associated to the {@link OAuth2AuthorizationContext#getAttributes() authorization context}.
+	 *
+	 * @param contextAttributesMapper the {@code Function} used for supplying the {@code Map} of attributes
+	 *                                   to the {@link OAuth2AuthorizationContext#getAttributes() authorization context}
+	 */
+	public void setContextAttributesMapper(Function<OAuth2AuthorizeRequest, Map<String, Object>> contextAttributesMapper) {
+		Assert.notNull(contextAttributesMapper, "contextAttributesMapper cannot be null");
+		this.contextAttributesMapper = contextAttributesMapper;
+	}
+
+	/**
+	 * The default implementation of the {@link #setContextAttributesMapper(Function) contextAttributesMapper}.
+	 */
+	public static class DefaultContextAttributesMapper implements Function<OAuth2AuthorizeRequest, Map<String, Object>> {
+
+		@Override
+		public Map<String, Object> apply(OAuth2AuthorizeRequest authorizeRequest) {
+			Map<String, Object> contextAttributes = Collections.emptyMap();
+			String scope = authorizeRequest.getAttribute(OAuth2ParameterNames.SCOPE);
+			if (StringUtils.hasText(scope)) {
+				contextAttributes = new HashMap<>();
+				contextAttributes.put(OAuth2AuthorizationContext.REQUEST_SCOPE_ATTRIBUTE_NAME,
+						StringUtils.delimitedListToStringArray(scope, " "));
+			}
+			return contextAttributes;
+		}
+	}
+}