initial code for cacher

Issue-ID: AAI-1473
Change-Id: I8babe91e79f5c1e6e97b0f5b6dc827b8c5caec80
Signed-off-by: LaMont, William (wl2432) <wl2432@att.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/src/main/java/org/onap/aai/interceptors/pre/HeaderValidation.java b/src/main/java/org/onap/aai/interceptors/pre/HeaderValidation.java
new file mode 100644
index 0000000..dfc4376
--- /dev/null
+++ b/src/main/java/org/onap/aai/interceptors/pre/HeaderValidation.java
@@ -0,0 +1,87 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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
+ *
+ *    http://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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aai.interceptors.pre;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+import javax.annotation.Priority;
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerRequestFilter;
+import javax.ws.rs.container.PreMatching;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.onap.aai.exceptions.AAIException;
+import org.onap.aai.interceptors.AAIContainerFilter;
+import org.onap.aai.interceptors.AAIHeaderProperties;
+import org.onap.aai.logging.ErrorLogHelper;
+
+@PreMatching
+@Priority(AAIRequestFilterPriority.HEADER_VALIDATION)
+public class HeaderValidation extends AAIContainerFilter implements ContainerRequestFilter {
+
+	@Override
+	public void filter(ContainerRequestContext requestContext) throws IOException {
+
+		Optional<Response> oResp;
+	
+		String transId = requestContext.getHeaderString(AAIHeaderProperties.TRANSACTION_ID);
+		String fromAppId = requestContext.getHeaderString(AAIHeaderProperties.FROM_APP_ID);
+
+		List<MediaType> acceptHeaderValues = requestContext.getAcceptableMediaTypes();
+
+		oResp = this.validateHeaderValuePresence(fromAppId, "AAI_4009", acceptHeaderValues);
+		if (oResp.isPresent()) {
+			requestContext.abortWith(oResp.get());
+			return;
+		}
+		oResp = this.validateHeaderValuePresence(transId, "AAI_4010", acceptHeaderValues);
+		if (oResp.isPresent()) {
+			requestContext.abortWith(oResp.get());
+			return;
+		}
+
+		if (!this.isValidUUID(transId)) {
+			transId = UUID.randomUUID().toString();
+			requestContext.getHeaders().get(AAIHeaderProperties.TRANSACTION_ID).clear();
+			requestContext.getHeaders().add(AAIHeaderProperties.TRANSACTION_ID, transId);
+		}
+
+	}
+	
+	private Optional<Response> validateHeaderValuePresence(String value, String errorCode,
+			List<MediaType> acceptHeaderValues) {
+		Response response = null;
+		AAIException aaie;
+		if (value == null) {
+			aaie = new AAIException(errorCode);
+			return Optional.of(Response.status(aaie.getErrorObject().getHTTPResponseCode())
+					.entity(ErrorLogHelper.getRESTAPIErrorResponse(acceptHeaderValues, aaie, new ArrayList<>()))
+					.build());
+		}
+
+		return Optional.ofNullable(response);
+	}
+
+}