software.xdev.mockserver.netty.proxy.socks.SocksProxyHandler Maven / Gradle / Ivy

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MockServer NeoLight Netty Server

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/*
 * Copyright © 2024 XDEV Software (https://xdev.software)
 *
 * 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.
 */
package software.xdev.mockserver.netty.proxy.socks;

import static software.xdev.mockserver.exception.ExceptionHandling.connectionClosedException;
import static software.xdev.mockserver.netty.HttpRequestHandler.setProxyingRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import software.xdev.mockserver.configuration.ServerConfiguration;
import software.xdev.mockserver.lifecycle.LifeCycle;


@ChannelHandler.Sharable
public abstract class SocksProxyHandler extends SimpleChannelInboundHandler
{
	private static final Logger LOG = LoggerFactory.getLogger(SocksProxyHandler.class);
	
	protected final ServerConfiguration configuration;
	protected final LifeCycle server;
	
	protected SocksProxyHandler(final ServerConfiguration configuration, final LifeCycle server)
	{
		super(false);
		this.configuration = configuration;
		this.server = server;
	}
	
	protected void forwardConnection(final ChannelHandlerContext ctx, final ChannelHandler forwarder)
	{
		setProxyingRequest(ctx, Boolean.TRUE);
		
		ctx.pipeline().replace(this, null, forwarder);
	}
	
	@Override
	public void channelReadComplete(final ChannelHandlerContext ctx)
	{
		ctx.flush();
	}
	
	@Override
	public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause)
	{
		if(connectionClosedException(cause))
		{
			LOG.error("Exception caught by SOCKS proxy handler -> closing pipeline {}", ctx.channel(), cause);
		}
		ctx.close();
	}
}