filters/provider/src/main/java/org/openecomp/sdnc/filters/RequestResponseLoggingFilter.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * openECOMP : SDN-C
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights
   6  *                                              reserved.
   7  * ================================================================================
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  * ============LICENSE_END=========================================================
  20  */
  21
  22 package org.openecomp.sdnc.filters;
  23
  24 import java.io.BufferedReader;
  25 import java.io.ByteArrayInputStream;
  26 import java.io.ByteArrayOutputStream;
  27 import java.io.IOException;
  28 import java.io.InputStream;
  29 import java.io.InputStreamReader;
  30 import java.io.PrintWriter;
  31 import java.util.Enumeration;
  32 import java.util.zip.GZIPInputStream;
  33 import java.util.zip.Inflater;
  34
  35 import javax.servlet.Filter;
  36 import javax.servlet.FilterChain;
  37 import javax.servlet.FilterConfig;
  38 import javax.servlet.ServletException;
  39 import javax.servlet.ServletInputStream;
  40 import javax.servlet.ServletOutputStream;
  41 import javax.servlet.ServletRequest;
  42 import javax.servlet.ServletResponse;
  43 import javax.servlet.http.HttpServletRequest;
  44 import javax.servlet.http.HttpServletRequestWrapper;
  45 import javax.servlet.http.HttpServletResponse;
  46 import javax.servlet.http.HttpServletResponseWrapper;
  47
  48 public class RequestResponseLoggingFilter implements Filter {
  49
  50         private static org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger("org.openecomp.sdnc.filters.request.response");
  51
  52         private static class ByteArrayServletStream extends ServletOutputStream {
  53
  54                 ByteArrayOutputStream baos;
  55
  56                 ByteArrayServletStream(ByteArrayOutputStream baos) {
  57                         this.baos = baos;
  58                 }
  59
  60                 public void write(int param) throws IOException {
  61                         baos.write(param);
  62                 }
  63         }
  64
  65         private static class ByteArrayPrintWriter {
  66
  67                 private ByteArrayOutputStream baos = new ByteArrayOutputStream();
  68
  69                 private PrintWriter pw = new PrintWriter(baos);
  70
  71                 private ServletOutputStream sos = new ByteArrayServletStream(baos);
  72
  73                 public PrintWriter getWriter() {
  74                         return pw;
  75                 }
  76
  77                 public ServletOutputStream getStream() {
  78                         return sos;
  79                 }
  80
  81                 byte[] toByteArray() {
  82                         return baos.toByteArray();
  83                 }
  84         }
  85
  86         private class BufferedServletInputStream extends ServletInputStream {
  87
  88                 ByteArrayInputStream bais;
  89
  90                 public BufferedServletInputStream(ByteArrayInputStream bais) {
  91                         this.bais = bais;
  92                 }
  93
  94                 public int available() {
  95                         return bais.available();
  96                 }
  97
  98                 public int read() {
  99                         return bais.read();
 100                 }
 101
 102                 public int read(byte[] buf, int off, int len) {
 103                         return bais.read(buf, off, len);
 104                 }
 105
 106         }
 107
 108         private class BufferedRequestWrapper extends HttpServletRequestWrapper {
 109
 110                 ByteArrayInputStream bais;
 111
 112                 ByteArrayOutputStream baos;
 113
 114                 BufferedServletInputStream bsis;
 115
 116                 byte[] buffer;
 117
 118                 public BufferedRequestWrapper(HttpServletRequest req) throws IOException {
 119                         super(req);
 120
 121                         InputStream is = req.getInputStream();
 122                         baos = new ByteArrayOutputStream();
 123                         byte buf[] = new byte[1024];
 124                         int letti;
 125                         while ((letti = is.read(buf)) > 0) {
 126                                 baos.write(buf, 0, letti);
 127                         }
 128                         buffer = baos.toByteArray();
 129
 130                 }
 131
 132                 public ServletInputStream getInputStream() {
 133                         try {
 134                                 bais = new ByteArrayInputStream(buffer);
 135                                 bsis = new BufferedServletInputStream(bais);
 136                         } catch (Exception ex) {
 137                                 ex.printStackTrace();
 138                         }
 139
 140                         return bsis;
 141                 }
 142
 143                 public byte[] getBuffer() {
 144                         return buffer;
 145                 }
 146
 147         }
 148
 149         public void init(FilterConfig filterConfig) throws ServletException {
 150         }
 151
 152         public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
 153                         throws IOException, ServletException {
 154
 155                 final HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
 156                 BufferedRequestWrapper bufferedRequest = new BufferedRequestWrapper(httpRequest);
 157
 158                 StringBuilder requestHeaders = new StringBuilder("REQUEST|");
 159                 requestHeaders.append(httpRequest.getMethod());
 160                 requestHeaders.append(":");
 161                 requestHeaders.append(httpRequest.getRequestURL().toString());
 162                 requestHeaders.append("|");
 163                 String header;
 164                 for (Enumeration<String> e = httpRequest.getHeaderNames(); e.hasMoreElements();) {
 165                         header = e.nextElement();
 166                         requestHeaders.append(header);
 167                         requestHeaders.append(":");
 168                         requestHeaders.append(httpRequest.getHeader(header));
 169                         requestHeaders.append(";");
 170
 171                 }
 172                 log.info(requestHeaders.toString());
 173
 174                 log.info("REQUEST BODY|" + new String(bufferedRequest.getBuffer()));
 175
 176                 final HttpServletResponse response = (HttpServletResponse) servletResponse;
 177
 178                 final ByteArrayPrintWriter pw = new ByteArrayPrintWriter();
 179                 HttpServletResponse wrappedResp = new HttpServletResponseWrapper(response) {
 180                         public PrintWriter getWriter() {
 181                                 return pw.getWriter();
 182                         }
 183
 184                         public ServletOutputStream getOutputStream() {
 185                                 return pw.getStream();
 186                         }
 187
 188                 };
 189
 190                 try {
 191
 192                 filterChain.doFilter(bufferedRequest, wrappedResp);
 193
 194                 }catch (Exception e){
 195                         log.error("Chain Exception",e);
 196                         throw e;
 197                 } finally {
 198                 byte[] bytes = pw.toByteArray();
 199                 response.getOutputStream().write(bytes);
 200
 201                 StringBuilder responseHeaders = new StringBuilder("RESPONSE HEADERS|");
 202
 203                 for (String headerName : response.getHeaderNames()) {
 204                         responseHeaders.append(headerName);
 205                         responseHeaders.append(":");
 206                         responseHeaders.append(response.getHeader(headerName));
 207                         responseHeaders.append(";");
 208
 209                 }
 210                 log.info(responseHeaders.toString());
 211
 212                 if ("gzip".equals(response.getHeader("Content-Encoding"))) {
 213
 214                         log.info("UNGZIPED RESPONSE BODY|" + decompressGZIPByteArray(bytes));
 215
 216                 } else {
 217
 218                         log.info("RESPONSE BODY|" + new String(bytes));
 219                 }
 220                 }
 221         }
 222
 223         public void destroy() {
 224         }
 225
 226         private String decompressGZIPByteArray(byte[] bytes) {
 227
 228                 BufferedReader in = null;
 229                 InputStreamReader inR = null;
 230                 ByteArrayInputStream byteS = null;
 231                 GZIPInputStream gzS = null;
 232                 StringBuilder str = new StringBuilder();
 233                 try {
 234                         byteS = new ByteArrayInputStream(bytes);
 235                         gzS = new GZIPInputStream(byteS);
 236                         inR = new InputStreamReader(gzS);
 237                         in = new BufferedReader(inR);
 238
 239                         if (in != null) {
 240
 241                                 String content;
 242
 243                                 while ((content = in.readLine()) != null) {
 244                                         str.append(content);
 245                                 }
 246                         }
 247
 248                 } catch (Exception e) {
 249                         log.error("Failed get read GZIPInputStream", e);
 250                 } finally {
 251
 252                         if (byteS != null)
 253                                 try {
 254                                         byteS.close();
 255                                 } catch (IOException e1) {
 256                                         log.error("Failed to close ByteStream", e1);
 257                                 }
 258                         if (gzS != null)
 259                                 try {
 260                                         gzS.close();
 261                                 } catch (IOException e2) {
 262                                         log.error("Failed to close GZStream", e2);
 263                                 }
 264                         if (inR != null)
 265                                 try {
 266                                         inR.close();
 267                                 } catch (IOException e3) {
 268                                         log.error("Failed to close InputReader", e3);
 269                                 }
 270                         if (in != null)
 271                                 try {
 272                                         in.close();
 273                                 } catch (IOException e) {
 274                                         log.error("Failed to close BufferedReader", e);
 275                                 }
 276                 }
 277                 return str.toString();
 278         }
 279 }