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/*-
* ============LICENSE_START=======================================================
* ONAP - SO
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.mso.client.policy;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.logging.Logger;
import javax.annotation.Priority;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.client.ClientRequestContext;
import javax.ws.rs.client.ClientRequestFilter;
import javax.ws.rs.client.ClientResponseContext;
import javax.ws.rs.client.ClientResponseFilter;
import javax.ws.rs.ext.WriterInterceptor;
import javax.ws.rs.ext.WriterInterceptorContext;
@Priority(Integer.MIN_VALUE)
public class LoggingFilter implements ClientRequestFilter, ClientResponseFilter, WriterInterceptor {
private static final Logger logger = Logger.getLogger(LoggingFilter.class.getName());
private static final String ENTITY_STREAM_PROPERTY = "LoggingFilter.entityStream";
private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
private final int maxEntitySize = 1024 * 8;
private void log(StringBuilder sb) {
logger.info(sb.toString());
}
private InputStream logInboundEntity(final StringBuilder b, InputStream stream, final Charset charset)
throws IOException {
InputStream inputStream = stream;
if (!inputStream.markSupported()) {
inputStream = new BufferedInputStream(inputStream);
}
inputStream.mark(maxEntitySize + 1);
final byte[] entity = new byte[maxEntitySize + 1];
final int entitySize = inputStream.read(entity);
b.append(new String(entity, 0, Math.min(entitySize, maxEntitySize), charset));
if (entitySize > maxEntitySize) {
b.append("...more...");
}
b.append('\n');
inputStream.reset();
return inputStream;
}
@Override
public void filter(ClientRequestContext requestContext) throws IOException {
if (requestContext.hasEntity()) {
final OutputStream stream = new LoggingStream(requestContext.getEntityStream());
requestContext.setEntityStream(stream);
requestContext.setProperty(ENTITY_STREAM_PROPERTY, stream);
}
}
@Override
public void filter(ClientRequestContext requestContext, ClientResponseContext responseContext) throws IOException {
final StringBuilder sb = new StringBuilder();
if (responseContext.hasEntity()) {
responseContext.setEntityStream(logInboundEntity(sb, responseContext.getEntityStream(), DEFAULT_CHARSET));
log(sb);
}
}
@Override
public void aroundWriteTo(WriterInterceptorContext context) throws IOException, WebApplicationException {
final LoggingStream stream = (LoggingStream) context.getProperty(ENTITY_STREAM_PROPERTY);
context.proceed();
if (stream != null) {
log(stream.getStringBuilder(DEFAULT_CHARSET));
}
}
private class LoggingStream extends FilterOutputStream {
private final StringBuilder sb = new StringBuilder();
private final ByteArrayOutputStream baos = new ByteArrayOutputStream();
LoggingStream(OutputStream out) {
super(out);
}
StringBuilder getStringBuilder(Charset charset) {
// write entity to the builder
final byte[] entity = baos.toByteArray();
sb.append(new String(entity, 0, entity.length, charset));
if (entity.length > maxEntitySize) {
sb.append("...more...");
}
sb.append('\n');
return sb;
}
@Override
public void write(final int i) throws IOException {
if (baos.size() <= maxEntitySize) {
baos.write(i);
}
out.write(i);
}
}
}
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