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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.wink.server.internal.log;
import java.io.IOException;
import java.util.Properties;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MultivaluedMap;
import org.apache.wink.server.handlers.HandlersChain;
import org.apache.wink.server.handlers.MessageContext;
import org.apache.wink.server.handlers.RequestHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Logs the incoming requests from client to server. This will log the headers
* plus the containers.
*/
public class Requests implements RequestHandler {
final private static Logger logger = LoggerFactory.getLogger(Requests.class);
final private static int BREAK_POINT =
Integer
.valueOf(System
.getProperty(Requests.class
.getName() + ".breakPoint",
"4096")).intValue();
final private static boolean IS_LOGGED_AS_BYTES =
Boolean
.valueOf(System
.getProperty(Requests.class
.getName() + ".logAsBytes",
"false"))
.booleanValue();
final private static int BUFFER_SIZE =
Integer
.valueOf(System
.getProperty(Requests.class
.getName() + ".bufferSize",
"8192")).intValue();
public void init(Properties props) {
/* do nothing */
}
public void handleRequest(MessageContext context, HandlersChain chain) throws Throwable {
logger.trace("handleRequest({}, {}) entry", context, chain);
try {
if (logger.isDebugEnabled()) {
logStartRequest(context);
}
chain.doChain(context);
} finally {
if (logger.isDebugEnabled()) {
logFinishRequest(context);
}
}
logger.trace("handleRequest({}, {}) exit", context, chain);
}
void logStartRequest(MessageContext context) {
logger.trace("logStartRequest() entry");
try {
if (!logger.isDebugEnabled()) {
logger.trace("logStartRequest() exit"); // how would this ever
// occur?
return;
}
/*
* start wrapping the InputStream here in the hope that it will be
* called during logFinishRequest
*/
HttpServletRequestWrapper request =
context.getAttribute(HttpServletRequestWrapper.class);
if (request == null) {
logger.debug("Could not find the HTTP Servlet Request to wrap.");
// this is a really bad path that should probably be an error,
// but just in case
logger.trace("logStartRequest() exit");
return;
}
logger.debug("Request URI is " + context.getUriInfo().getRequestUri().toASCIIString());
HttpHeaders headers = context.getHttpHeaders();
MultivaluedMap headersMap = headers.getRequestHeaders();
String headersString = "{";
for(String key : headersMap.keySet()) {
headersString += (key + "=" + headersMap.get(key) + ",");
}
if(headersString.length() > 1)
headersString = headersString.substring(0, headersString.length() -1);
headersString += "}";
logger.debug("HTTP Headers are " + headersString);
RequestWrapper wrapper = new RequestWrapper(request);
context.setAttribute(RequestWrapper.class, wrapper);
context.setAttribute(HttpServletRequest.class, wrapper);
context.setAttribute(HttpServletRequestWrapper.class, wrapper);
} catch (Exception e) {
logger.trace("Could not log the start of the request", e);
}
logger.trace("logStartRequest() exit");
}
void logFinishRequest(MessageContext context) {
logger.trace("logFinishRequest() entry");
try {
if (!logger.isDebugEnabled()) {
logger.trace("logFinishRequest() exit"); // how would this ever
// occur?
return;
}
RequestWrapper requestWrapper = context.getAttribute(RequestWrapper.class);
if (requestWrapper == null) {
logger.debug("Did not find the RequestWrapper so will not log the request entity.");
logger.trace("logStartRequest() exit");
return;
}
LoggedServletInputStream loggedInputStream = requestWrapper.getLoggedInputStream();
if (loggedInputStream == null || loggedInputStream.getLoggedByteBufferLength() == 0) {
logger
.debug("The request entity was not read from the HttpServletRequest.getInputStream().");
return;
}
byte[] buffer = loggedInputStream.getLoggedByteBuffer();
final int bufferLength = loggedInputStream.getLoggedByteBufferLength();
if (IS_LOGGED_AS_BYTES) {
logger.debug("The request entity as bytes:");
StringBuffer sb = new StringBuffer();
int outputCount = 0;
for (int count = 0; count < bufferLength; ++count) {
sb.append(String.format("%#04x ", buffer[count]));
sb.append(" ");
++outputCount;
if (outputCount > BREAK_POINT) {
/*
* 100KB increments
*/
logger.debug("{}", sb);
sb = new StringBuffer();
outputCount = 0;
}
}
if (outputCount > 0) {
logger.debug("{}", sb);
sb = new StringBuffer();
}
} else {
logger.debug("The request entity as a String in the default encoding:");
int offset = 0;
while (offset < bufferLength) {
int length = bufferLength - offset;
if (length > BREAK_POINT) {
length = BREAK_POINT;
}
String str = new String(buffer, offset, length);
logger.debug("{}", str);
offset += length;
}
}
/*
* remove it in case during a Response chain, an exception is thrown
* and then a Request needs to be logged again. so only 1 shot at
* logging a request.
*/
context.setAttribute(RequestWrapper.class, null);
} catch (Exception e) {
logger.debug("Could not log the finishing of the request", e);
}
logger.trace("logFinishRequest() exit");
}
public static class RequestWrapper extends HttpServletRequestWrapper {
final private HttpServletRequest request;
private LoggedServletInputStream inputStreamLogger = null;
private ServletInputStream originalStream;
private boolean hasStreamBeenRetrievedBefore = false;
public RequestWrapper(HttpServletRequest request) {
super(request);
this.request = request;
}
@Override
public ServletInputStream getInputStream() throws IOException {
if (inputStreamLogger != null) {
return inputStreamLogger;
}
if (!hasStreamBeenRetrievedBefore) {
originalStream = request.getInputStream();
}
if (originalStream == null) {
/*
* this could happen in a weird situation with the web
* container. defensive coding for now.
*/
logger
.debug("The web container did not return a stream from HttpServletRequest.getInputStream()");
return null;
}
inputStreamLogger = new LoggedServletInputStream(originalStream, BUFFER_SIZE);
return inputStreamLogger;
}
public LoggedServletInputStream getLoggedInputStream() {
return inputStreamLogger;
}
}
/**
* A wrapper class for a ServletInputStream that also logs the bytes.
*/
public static class LoggedServletInputStream extends ServletInputStream {
final private ServletInputStream originalRequest;
private final byte[] requestBuffer;
private int offset = 0;
public LoggedServletInputStream(ServletInputStream originalRequest, int bufferSize) {
this.originalRequest = originalRequest;
requestBuffer = new byte[bufferSize];
}
@Override
public int available() throws IOException {
return originalRequest.available();
}
@Override
public void close() throws IOException {
originalRequest.close();
}
@Override
public void mark(int readlimit) {
originalRequest.mark(readlimit);
}
@Override
public boolean markSupported() {
return originalRequest.markSupported();
}
@Override
public int read() throws IOException {
int value = originalRequest.read();
if (value < 0) {
return value;
}
if (offset < requestBuffer.length - 1) {
requestBuffer[offset] = (byte)value;
++offset;
}
return value;
}
@Override
public int read(byte[] b) throws IOException {
int value = originalRequest.read(b);
if (value < 0) {
return value;
}
int diff = value;
if (offset + value > requestBuffer.length) {
diff = requestBuffer.length - offset;
}
if (diff > 0) {
System.arraycopy(b, 0, requestBuffer, offset, diff);
offset += diff;
}
return value;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int value = originalRequest.read(b, off, len);
if (value < 0) {
return value;
}
int diff = value;
if (offset + value > requestBuffer.length) {
diff = requestBuffer.length - offset;
}
if (diff > 0) {
System.arraycopy(b, off, requestBuffer, offset, diff);
offset += diff;
}
return value;
}
@Override
public int readLine(byte[] b, int off, int len) throws IOException {
int value = originalRequest.readLine(b, off, len);
if (value < 0) {
return value;
}
int diff = value;
if (offset + value > requestBuffer.length) {
diff = requestBuffer.length - offset;
}
if (diff > 0) {
System.arraycopy(b, off, requestBuffer, offset, diff);
offset += diff;
}
return value;
}
@Override
public void reset() throws IOException {
originalRequest.reset();
}
@Override
public long skip(long n) throws IOException {
return originalRequest.skip(n);
}
public byte[] getLoggedByteBuffer() {
return requestBuffer;
}
public int getLoggedByteBufferLength() {
return offset;
}
}
}
