1 files changed, 127 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dmaap/mr/filter/ContentLengthFilter.java b/src/main/java/org/onap/dmaap/mr/filter/ContentLengthFilter.java
new file mode 100644
index 0000000..914efb9
--- /dev/null
+++ b/src/main/java/org/onap/dmaap/mr/filter/ContentLengthFilter.java
@@ -0,0 +1,127 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  org.onap.dmaap
+ *  ================================================================================
+ *  Copyright © 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=========================================================
+ *  
+ *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ *  
+ *******************************************************************************/
+package org.onap.dmaap.mr.filter;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import org.apache.http.HttpStatus;
+import org.json.JSONObject;
+import org.onap.dmaap.dmf.mr.CambriaApiException;
+import org.onap.dmaap.dmf.mr.exception.DMaaPErrorMessages;
+import org.onap.dmaap.dmf.mr.exception.DMaaPResponseCode;
+import org.onap.dmaap.dmf.mr.exception.ErrorResponse;
+import org.onap.dmaap.mr.filter.DefaultLength;
+import org.springframework.context.ApplicationContext;
+import org.springframework.web.context.support.WebApplicationContextUtils;
+
+import javax.servlet.*;
+import javax.servlet.http.HttpServletRequest;
+import java.io.IOException;
+
+/**
+ * Servlet Filter implementation class ContentLengthFilter
+ */
+public class ContentLengthFilter implements Filter {
+
+	private DefaultLength defaultLength;
+
+	private FilterConfig filterConfig = null;
+	DMaaPErrorMessages errorMessages = null;
+
+	private static final EELFLogger log = EELFManager.getInstance().getLogger(org.onap.dmaap.mr.filter.ContentLengthFilter.class);
+	/**
+	 * Default constructor.
+	 */
+
+	public ContentLengthFilter() {
+		// TODO Auto-generated constructor stub
+	}
+
+	/**
+	 * @see Filter#destroy()
+	 */
+	public void destroy() {
+		// TODO Auto-generated method stub
+	}
+
+	/**
+	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
+	 */
+	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,
+			ServletException {
+		log.info("inside servlet do filter content length checking before pub/sub");
+		HttpServletRequest request = (HttpServletRequest) req;
+		JSONObject jsonObj = null;
+		int requestLength = 0;
+		try {
+			// retrieving content length from message header
+
+			if (null != request.getHeader("Content-Length")) {
+				requestLength = Integer.parseInt(request.getHeader("Content-Length"));
+			}
+			// retrieving encoding from message header
+			String transferEncoding = request.getHeader("Transfer-Encoding");
+			// checking for no encoding, chunked and requestLength greater then
+			// default length
+			if (null != transferEncoding && !(transferEncoding.contains("chunked"))
+					&& (requestLength > Integer.parseInt(defaultLength.getDefaultLength()))) {
+				jsonObj = new JSONObject().append("defaultlength", defaultLength)
+						.append("requestlength", requestLength);
+				log.error("message length is greater than default");
+				throw new CambriaApiException(jsonObj);
+			} else if (null == transferEncoding && (requestLength > Integer.parseInt(defaultLength.getDefaultLength()))) {
+				jsonObj = new JSONObject().append("defaultlength", defaultLength.getDefaultLength()).append(
+						"requestlength", requestLength);
+				log.error("Request message is not chunked or request length is greater than default length");
+				throw new CambriaApiException(jsonObj);
+			} else {
+				chain.doFilter(req, res);
+			}
+		} catch (CambriaApiException | NumberFormatException e) {
+			log.error("message size is greater then default", e);
+            if (jsonObj != null) {
+                ErrorResponse errRes = new ErrorResponse(HttpStatus.SC_EXPECTATION_FAILED,
+                        DMaaPResponseCode.MSG_SIZE_EXCEEDS_MSG_LIMIT.getResponseCode(),
+                        errorMessages.getMsgSizeExceeds()
+                                + jsonObj.toString());
+                log.info(errRes.toString());
+            }
+		}
+
+	}
+
+	/**
+	 * @see Filter#init(FilterConfig)
+	 */
+	public void init(FilterConfig fConfig) throws ServletException {
+		this.filterConfig = fConfig;
+		log.info("Filter Content Length Initialize");
+		ApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(fConfig
+				.getServletContext());
+		DefaultLength defLength = (DefaultLength) ctx.getBean("defLength");
+		DMaaPErrorMessages errMessages = (DMaaPErrorMessages) ctx.getBean("DMaaPErrorMessages");
+		this.errorMessages = errMessages;
+		this.defaultLength = defLength;
+
+	}
+
+}