1 files changed, 81 insertions, 0 deletions
diff --git a/common-app-api/src/main/java/org/openecomp/sdc/common/util/HttpUtil.java b/common-app-api/src/main/java/org/openecomp/sdc/common/util/HttpUtil.java
new file mode 100644
index 0000000000..f4f34a9934
--- /dev/null
+++ b/common-app-api/src/main/java/org/openecomp/sdc/common/util/HttpUtil.java
@@ -0,0 +1,81 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 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.openecomp.sdc.common.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import javax.servlet.ServletInputStream;
+import javax.servlet.http.HttpServletRequest;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import fj.data.Either;
+
+public class HttpUtil {
+	public static Either<String, IOException> readJsonStringFromRequest(HttpServletRequest request) {
+		Either<String, IOException> eitherResult;
+		try (ByteArrayOutputStream stream = new ByteArrayOutputStream()) {
+			ServletInputStream reader = request.getInputStream();
+			int value;
+			while ((value = reader.read()) != -1) {
+				stream.write(value);
+			}
+			eitherResult = Either.left(new String(stream.toByteArray()));
+		} catch (IOException e) {
+			eitherResult = Either.right(e);
+		}
+		return eitherResult;
+
+	}
+
+	/**
+	 * Builds an object from a JSON in the POST Body of the request.
+	 */
+	public static <T> Either<T, Exception> getObjectFromJson(HttpServletRequest request, Class<T> classOfT) {
+		Either<T, Exception> eitherResult;
+		try {
+			Either<String, IOException> eitherReadJson = readJsonStringFromRequest(request);
+			if (eitherReadJson.isLeft()) {
+				eitherResult = convertJsonStringToObject(eitherReadJson.left().value(), classOfT);
+			} else {
+				eitherResult = Either.right((Exception) eitherReadJson.right().value());
+			}
+		} catch (Exception e) {
+			eitherResult = Either.right(e);
+		}
+
+		return eitherResult;
+	}
+
+	public static <T> Either<T, Exception> convertJsonStringToObject(String sentJson, Class<T> classOfT) {
+		Either<T, Exception> eitherResult;
+		try {
+			Gson gson = new GsonBuilder().setPrettyPrinting().create();
+			T object = gson.fromJson(sentJson, classOfT);
+			eitherResult = Either.left(object);
+		} catch (Exception e) {
+			eitherResult = Either.right(e);
+		}
+		return eitherResult;
+	}
+}