LoggingStreamInterceptor.java
/*
* Copyright (c) 2021, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.synapse.transport.passthru;
import org.apache.axis2.context.MessageContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
/**
* Sample stream interceptor, which intercepts source and target request to print the stream passing via the engine.
* <pre>
* {@code
* <interceptors xmlns:svns="http://org.wso2.securevault/configuration">
* <interceptor class="org.apache.synapse.transport.passthru.LoggingStreamInterceptor">
* <parameter name="charset" value="ISO-8859-1"/>
* <parameter name="enableInterception" value="true"/>
* </interceptor>
* </interceptors>
* }
* </pre>
*/
public class LoggingStreamInterceptor extends DefaultStreamInterceptor {
private static final Log log = LogFactory.getLog(LoggingStreamInterceptor.class);
private static final String INPUT = ">>>";
private static final String OUTPUT = "<<<";
private String charset = Charset.defaultCharset().toString();
private boolean enableInterception = false;
@Override
public boolean interceptSourceRequest(MessageContext axisCtx) {
return enableInterception;
}
@Override
public boolean sourceRequest(ByteBuffer buffer, MessageContext ctx) {
printStream(buffer, INPUT);
return true;
}
@Override
public boolean interceptTargetRequest(MessageContext axisCtx) {
return enableInterception;
}
@Override
public void targetRequest(ByteBuffer buffer, MessageContext ctx) {
printStream(buffer, OUTPUT);
}
@Override
public boolean interceptTargetResponse(MessageContext axisCtx) {
return enableInterception;
}
@Override
public boolean targetResponse(ByteBuffer buffer, MessageContext ctx) {
printStream(buffer, INPUT);
return true;
}
@Override
public boolean interceptSourceResponse(MessageContext axisCtx) {
return enableInterception;
}
@Override
public void sourceResponse(ByteBuffer buffer, MessageContext ctx) {
printStream(buffer, OUTPUT);
}
private void printStream(ByteBuffer stream, String direction) {
Charset charsetValue = Charset.forName(this.charset);
String text = charsetValue.decode(stream).toString();
log.info(direction + " " + text);
}
public void setCharset(String charset) {
this.charset = charset;
if (log.isDebugEnabled()) {
log.debug("Charset : " + charset);
}
}
public void setEnableInterception(boolean enableInterception) {
this.enableInterception = enableInterception;
}
}