src/main/java/com/att/nsa/dmaap/util/ContentLengthInterceptor.java

   1 /*******************************************************************************
   2  *  ============LICENSE_START=======================================================
   3  *  org.onap.dmaap
   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
  11  *
  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=========================================================
  18  *
  19  *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
  20  *
  21  *******************************************************************************/
  22 package com.att.nsa.dmaap.util;
  23
  24 import java.util.Map;
  25 import javax.servlet.http.HttpServletRequest;
  26 import javax.servlet.http.HttpServletResponse;
  27 import org.apache.http.HttpStatus;
  28 import com.att.eelf.configuration.EELFLogger;
  29 import com.att.eelf.configuration.EELFManager;
  30 import org.json.JSONException;
  31 import org.json.JSONObject;
  32 import org.springframework.stereotype.Component;
  33 import com.att.nsa.cambria.CambriaApiException;
  34 import com.att.nsa.cambria.exception.DMaaPResponseCode;
  35 import com.att.nsa.cambria.exception.ErrorResponse;
  36 import ajsc.beans.interceptors.AjscInterceptor;
  37
  38 /**
  39  * AJSC Intercepter implementation of ContentLengthFilter
  40  */
  41 @Component
  42 public class ContentLengthInterceptor implements AjscInterceptor{
  43
  44
  45         private String defLength;
  46         //private Logger log = Logger.getLogger(ContentLengthInterceptor.class.toString());
  47         private static final EELFLogger log = EELFManager.getInstance().getLogger(ContentLengthInterceptor.class);
  48
  49
  50         /**
  51          * Intercepter method to intercept requests before processing
  52          */
  53         @Override
  54         public boolean allowOrReject(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse,
  55                         Map map) throws Exception {
  56
  57                 log.info("inside Interceptor allowOrReject content length checking before pub/sub");
  58
  59                 JSONObject jsonObj = null;
  60                 int requestLength = 0;
  61                 setDefLength(System.getProperty("maxcontentlength"));
  62                 try {
  63                         // retrieving content length from message header
  64
  65                         if (null != httpservletrequest.getHeader("Content-Length")) {
  66                                 requestLength = Integer.parseInt(httpservletrequest.getHeader("Content-Length"));
  67                         }
  68                         // retrieving encoding from message header
  69                         String transferEncoding = httpservletrequest.getHeader("Transfer-Encoding");
  70                         // checking for no encoding, chunked and requestLength greater then
  71                         // default length
  72                                 if (null != transferEncoding && !(transferEncoding.contains("chunked"))
  73                                                 && (requestLength > Integer.parseInt(getDefLength()))) {
  74                                         jsonObj = new JSONObject().append("defaultlength", getDefLength())
  75                                                         .append("requestlength", requestLength);
  76                                         log.error("message length is greater than default");
  77                                         throw new CambriaApiException(jsonObj);
  78                                 }
  79                                 else if (null == transferEncoding && (requestLength > Integer.parseInt(getDefLength())))
  80                                 {
  81                                         jsonObj = new JSONObject().append("defaultlength", getDefLength()).append(
  82                                                         "requestlength", requestLength);
  83                                         log.error("Request message is not chunked or request length is greater than default length");
  84                                         throw new CambriaApiException(jsonObj);
  85
  86
  87                                 }
  88                                 else
  89                                 {
  90                                 //chain.doFilter(req, res);
  91                                 return true;
  92                                 }
  93
  94                 } catch (CambriaApiException | NumberFormatException | JSONException e) {
  95
  96                         log.info("Exception obj--"+e);
  97                         log.error("message size is greater then default"+e.getMessage());
  98                         ErrorResponse errRes = new ErrorResponse(HttpStatus.SC_REQUEST_TOO_LONG,
  99                                         DMaaPResponseCode.MSG_SIZE_EXCEEDS_MSG_LIMIT.getResponseCode(), System.getProperty("msg_size_exceeds")
 100                                                         + jsonObj.toString());
 101                         log.info(errRes.toString());
 102
 103
 104                         map.put(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,"test");
 105                         httpservletresponse.setStatus(HttpStatus.SC_REQUEST_TOO_LONG);
 106                         httpservletresponse.getOutputStream().write(errRes.toString().getBytes());
 107                         return false;
 108                 }
 109
 110
 111
 112         }
 113
 114
 115         /**
 116          * Get Default Content Length
 117          * @return defLength
 118          */
 119         public String getDefLength() {
 120                 return defLength;
 121         }
 122         /**
 123          * Set Default Content Length
 124          * @param defLength
 125          */
 126         public void setDefLength(String defLength) {
 127                 this.defLength = defLength;
 128         }
 129
 130
 131
 132 }