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Functionality used by all MockServer modules for matching and expectations
package org.mockserver.logging;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufHolder;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.ChannelPromise;
import io.netty.handler.ssl.SslHandler;
import io.netty.handler.ssl.SslHandshakeCompletionEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import static org.mockserver.character.Character.NEW_LINE;
@Sharable
public class LoggingHandler extends ChannelDuplexHandler {
private static final String[] BYTE2HEX = new String[256];
private static final String[] HEXPADDING = new String[16];
private static final String[] BYTEPADDING = new String[16];
private static final char[] BYTE2CHAR = new char[256];
static {
int i;
// Generate the lookup table for byte-to-hex-dump conversion
for (i = 0; i < 10; i++) {
BYTE2HEX[i] = " 0" + i;
}
for (; i < 16; i++) {
BYTE2HEX[i] = " 0" + (char) ('a' + i - 10);
}
for (; i < BYTE2HEX.length; i++) {
BYTE2HEX[i] = " " + Integer.toHexString(i);
}
// Generate the lookup table for hex dump paddings
for (i = 0; i < HEXPADDING.length; i++) {
int padding = HEXPADDING.length - i;
StringBuilder buf = new StringBuilder(padding * 3);
for (int j = 0; j < padding; j++) {
buf.append(" ");
}
HEXPADDING[i] = buf.toString();
}
// Generate the lookup table for byte dump paddings
for (i = 0; i < BYTEPADDING.length; i++) {
int padding = BYTEPADDING.length - i;
StringBuilder buf = new StringBuilder(padding);
for (int j = 0; j < padding; j++) {
buf.append(' ');
}
BYTEPADDING[i] = buf.toString();
}
// Generate the lookup table for byte-to-char conversion
for (i = 0; i < BYTE2CHAR.length; i++) {
if (i <= 0x1f || i >= 0x7f) {
BYTE2CHAR[i] = '.';
} else {
BYTE2CHAR[i] = (char) i;
}
}
}
protected final Logger logger;
public LoggingHandler(final String loggerName) {
logger = LoggerFactory.getLogger(loggerName);
}
public void addLoggingHandler(ChannelHandlerContext ctx) {
ChannelPipeline pipeline = ctx.pipeline();
if (pipeline.get(LoggingHandler.class) != null) {
pipeline.remove(LoggingHandler.class);
}
ChannelHandlerContext context = pipeline.context(SslHandler.class);
if (context != null) {
pipeline.addAfter(context.name(), "LoggingHandler#0", this);
} else {
pipeline.addFirst(this);
}
}
@Override
public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
logger.trace(format(ctx, "REGISTERED"));
super.channelRegistered(ctx);
}
@Override
public void channelUnregistered(ChannelHandlerContext ctx) throws Exception {
logger.trace(format(ctx, "UNREGISTERED"));
super.channelUnregistered(ctx);
}
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
logger.trace(format(ctx, "ACTIVE"));
super.channelActive(ctx);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
logger.trace(format(ctx, "INACTIVE"));
super.channelInactive(ctx);
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
logger.trace(format(ctx, "EXCEPTION: " + cause), cause);
super.exceptionCaught(ctx, cause);
}
@Override
public void userEventTriggered(final ChannelHandlerContext ctx, Object evt) throws Exception {
if (evt instanceof SslHandshakeCompletionEvent) {
logger.trace(format(ctx, "SslHandshakeCompletionEvent: "), ((SslHandshakeCompletionEvent) evt).cause());
} else if (evt instanceof Exception) {
logger.trace(format(ctx, "Exception: "), (Exception) evt);
} else {
logger.trace(format(ctx, "USER_EVENT: " + evt));
}
super.userEventTriggered(ctx, evt);
}
@Override
public void bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise) throws Exception {
logger.trace(format(ctx, "BIND(" + localAddress + ')'));
super.bind(ctx, localAddress, promise);
}
@Override
public void connect(ChannelHandlerContext ctx, SocketAddress remoteAddress, SocketAddress localAddress, ChannelPromise promise) throws Exception {
logger.trace(format(ctx, "CONNECT(" + remoteAddress + ", " + localAddress + ')'));
super.connect(ctx, remoteAddress, localAddress, promise);
}
@Override
public void disconnect(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
logger.trace(format(ctx, "DISCONNECT()"));
super.disconnect(ctx, promise);
}
@Override
public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
logger.trace(format(ctx, "CLOSE()"));
super.close(ctx, promise);
}
@Override
public void deregister(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
logger.trace(format(ctx, "DEREGISTER()"));
super.deregister(ctx, promise);
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
logMessage(ctx, "RECEIVED", msg);
ctx.fireChannelRead(msg);
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {
logMessage(ctx, "WRITE", msg);
ctx.write(msg, promise);
}
@Override
public void flush(ChannelHandlerContext ctx) {
logger.trace(format(ctx, "FLUSH"));
ctx.flush();
}
private void logMessage(ChannelHandlerContext ctx, String eventName, Object msg) {
logger.trace(format(ctx, formatMessage(eventName, msg)));
}
protected String format(ChannelHandlerContext ctx, String message) {
String chStr = ctx.channel().toString() + ' ' + message;
if (logger.isTraceEnabled()) {
chStr += NEW_LINE +
"channel: " + ctx.channel().id() + NEW_LINE +
"localAddress: " + ctx.channel().localAddress() + NEW_LINE +
"remoteAddress: " + ctx.channel().remoteAddress() + NEW_LINE +
"current: " + ctx.name() + NEW_LINE +
"pipeline: " + ctx.pipeline().names() + NEW_LINE;
}
return chStr;
}
private String formatMessage(String eventName, Object msg) {
if (msg instanceof ByteBuf) {
return formatByteBuf(eventName, (ByteBuf) msg);
} else if (msg instanceof ByteBufHolder) {
return formatByteBufHolder(eventName, (ByteBufHolder) msg);
} else {
return formatNonByteBuf(eventName, msg);
}
}
private String formatByteBuf(String eventName, ByteBuf buf) {
int length = buf.readableBytes();
int rows = length / 16 + (length % 15 == 0 ? 0 : 1) + 4;
StringBuilder dump = new StringBuilder(rows * 80 + eventName.length() + 16);
dump.append(eventName).append('(').append(length).append('B').append(')')
.append(NEW_LINE)
.append(" +-------------------------------------------------+")
.append(NEW_LINE)
.append(" | 0 1 2 3 4 5 6 7 8 9 a b c d e f |")
.append(NEW_LINE)
.append("+--------+-------------------------------------------------+----------------+");
final int startIndex = buf.readerIndex();
final int endIndex = buf.writerIndex();
int i;
for (i = startIndex; i < endIndex; i++) {
int relIdx = i - startIndex;
int relIdxMod16 = relIdx & 15;
if (relIdxMod16 == 0) {
dump.append(NEW_LINE);
dump.append(Long.toHexString(relIdx & 0xFFFFFFFFL | 0x100000000L));
dump.setCharAt(dump.length() - 9, '|');
dump.append('|');
}
dump.append(BYTE2HEX[buf.getUnsignedByte(i)]);
if (relIdxMod16 == 15) {
dump.append(" |");
if (i > 15 && buf.readableBytes() > i) {
dump.append(buf.toString(i - 15, 16, StandardCharsets.UTF_8).replaceAll("" + NEW_LINE, "/").replaceAll("\r", "/"));
} else {
for (int j = i - 15; j <= i; j++) {
dump.append(BYTE2CHAR[buf.getUnsignedByte(j)]);
}
}
dump.append('|');
}
}
if ((i - startIndex & 15) != 0) {
int remainder = length & 15;
dump.append(HEXPADDING[remainder]);
dump.append(" |");
for (int j = i - remainder; j < i; j++) {
dump.append(BYTE2CHAR[buf.getUnsignedByte(j)]);
}
dump.append(BYTEPADDING[remainder]);
dump.append('|');
}
dump.append(NEW_LINE).append("+--------+-------------------------------------------------+----------------+");
return dump.toString();
}
private String formatByteBufHolder(String eventName, ByteBufHolder msg) {
return formatByteBuf(eventName, msg.content());
}
private String formatNonByteBuf(String eventName, Object msg) {
String msgAsString = msg.toString();
return eventName + "(rel:" + msgAsString.length() + ")" + ": " + msgAsString;
}
}
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