1 /*******************************************************************************
2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 * ============LICENSE_END=========================================================
19 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
21 *******************************************************************************/
22 package org.onap.dmaap.mr.filter;
24 import com.att.eelf.configuration.EELFLogger;
25 import com.att.eelf.configuration.EELFManager;
26 import org.apache.http.HttpStatus;
27 import org.json.JSONObject;
28 import org.onap.dmaap.dmf.mr.CambriaApiException;
29 import org.onap.dmaap.dmf.mr.exception.DMaaPErrorMessages;
30 import org.onap.dmaap.dmf.mr.exception.DMaaPResponseCode;
31 import org.onap.dmaap.dmf.mr.exception.ErrorResponse;
32 import org.onap.dmaap.mr.filter.DefaultLength;
33 import org.springframework.context.ApplicationContext;
34 import org.springframework.web.context.support.WebApplicationContextUtils;
36 import javax.servlet.*;
37 import javax.servlet.http.HttpServletRequest;
38 import java.io.IOException;
41 * Servlet Filter implementation class ContentLengthFilter
43 public class ContentLengthFilter implements Filter {
45 private DefaultLength defaultLength;
47 private FilterConfig filterConfig = null;
48 DMaaPErrorMessages errorMessages = null;
50 private static final EELFLogger log = EELFManager.getInstance().getLogger(org.onap.dmaap.mr.filter.ContentLengthFilter.class);
52 * Default constructor.
55 public ContentLengthFilter() {
56 // TODO Auto-generated constructor stub
60 * @see Filter#destroy()
62 public void destroy() {
63 // TODO Auto-generated method stub
67 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
69 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,
71 log.info("inside servlet do filter content length checking before pub/sub");
72 HttpServletRequest request = (HttpServletRequest) req;
73 JSONObject jsonObj = null;
74 int requestLength = 0;
76 // retrieving content length from message header
78 if (null != request.getHeader("Content-Length")) {
79 requestLength = Integer.parseInt(request.getHeader("Content-Length"));
81 // retrieving encoding from message header
82 String transferEncoding = request.getHeader("Transfer-Encoding");
83 // checking for no encoding, chunked and requestLength greater then
85 if (null != transferEncoding && !(transferEncoding.contains("chunked"))
86 && (requestLength > Integer.parseInt(defaultLength.getDefaultLength()))) {
87 jsonObj = new JSONObject().append("defaultlength", defaultLength)
88 .append("requestlength", requestLength);
89 log.error("message length is greater than default");
90 throw new CambriaApiException(jsonObj);
91 } else if (null == transferEncoding && (requestLength > Integer.parseInt(defaultLength.getDefaultLength()))) {
92 jsonObj = new JSONObject().append("defaultlength", defaultLength.getDefaultLength()).append(
93 "requestlength", requestLength);
94 log.error("Request message is not chunked or request length is greater than default length");
95 throw new CambriaApiException(jsonObj);
97 chain.doFilter(req, res);
99 } catch (CambriaApiException | NumberFormatException e) {
100 log.error("message size is greater then default", e);
101 if (jsonObj != null) {
102 ErrorResponse errRes = new ErrorResponse(HttpStatus.SC_EXPECTATION_FAILED,
103 DMaaPResponseCode.MSG_SIZE_EXCEEDS_MSG_LIMIT.getResponseCode(),
104 errorMessages.getMsgSizeExceeds()
105 + jsonObj.toString());
106 log.info(errRes.toString());
113 * @see Filter#init(FilterConfig)
115 public void init(FilterConfig fConfig) throws ServletException {
116 this.filterConfig = fConfig;
117 log.info("Filter Content Length Initialize");
118 ApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(fConfig
119 .getServletContext());
120 DefaultLength defLength = (DefaultLength) ctx.getBean("defLength");
121 DMaaPErrorMessages errMessages = (DMaaPErrorMessages) ctx.getBean("DMaaPErrorMessages");
122 this.errorMessages = errMessages;
123 this.defaultLength = defLength;