223efc5f99
Motivation: The examples have not been updated since long time ago, showing various issues fixed in this commit. Modifications: - Overall simplification to reduce LoC - Use system properties to get options instead of parsing args. - Minimize option validation - Just use System.out/err instead of Logger - Do not pass config as parameters - just access it directly - Move the main logic to main(String[]) instead of creating a new instance meaninglessly - Update netty-build-21 to make checkstyle not complain - Remove 'throws Exception' clause if possible - Line wrap at 120 (previously at 80) - Add an option to enable SSL for most examples - Use ChannelFuture.sync() instead of await() - Use System.out for the actual result. Use System.err otherwise. - Delete examples that are not very useful: - applet - websocket/html5 - websocketx/sslserver - localecho/multithreaded - Add run-example.sh which simplifies launching an example from command line - Rewrite FileServer example Result: Shorter and simpler examples. A user can focus more on what it actually does than miscellaneous stuff. A user can launch an example very easily.
96 lines
3.5 KiB
Java
96 lines
3.5 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.socks;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.ReplayingDecoder;
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import io.netty.util.CharsetUtil;
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import java.util.List;
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/**
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* Decodes {@link ByteBuf}s into {@link SocksCmdRequest}.
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* Before returning SocksRequest decoder removes itself from pipeline.
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*/
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public class SocksCmdRequestDecoder extends ReplayingDecoder<SocksCmdRequestDecoder.State> {
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private SocksProtocolVersion version;
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private int fieldLength;
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private SocksCmdType cmdType;
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private SocksAddressType addressType;
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private byte reserved;
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private String host;
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private int port;
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private SocksRequest msg = SocksCommonUtils.UNKNOWN_SOCKS_REQUEST;
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public SocksCmdRequestDecoder() {
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super(State.CHECK_PROTOCOL_VERSION);
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}
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@Override
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protected void decode(ChannelHandlerContext ctx, ByteBuf byteBuf, List<Object> out) throws Exception {
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switch (state()) {
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case CHECK_PROTOCOL_VERSION: {
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version = SocksProtocolVersion.fromByte(byteBuf.readByte());
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if (version != SocksProtocolVersion.SOCKS5) {
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break;
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}
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checkpoint(State.READ_CMD_HEADER);
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}
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case READ_CMD_HEADER: {
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cmdType = SocksCmdType.fromByte(byteBuf.readByte());
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reserved = byteBuf.readByte();
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addressType = SocksAddressType.fromByte(byteBuf.readByte());
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checkpoint(State.READ_CMD_ADDRESS);
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}
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case READ_CMD_ADDRESS: {
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switch (addressType) {
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case IPv4: {
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host = SocksCommonUtils.intToIp(byteBuf.readInt());
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port = byteBuf.readUnsignedShort();
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msg = new SocksCmdRequest(cmdType, addressType, host, port);
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break;
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}
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case DOMAIN: {
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fieldLength = byteBuf.readByte();
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host = byteBuf.readBytes(fieldLength).toString(CharsetUtil.US_ASCII);
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port = byteBuf.readUnsignedShort();
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msg = new SocksCmdRequest(cmdType, addressType, host, port);
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break;
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}
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case IPv6: {
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host = SocksCommonUtils.ipv6toStr(byteBuf.readBytes(16).array());
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port = byteBuf.readUnsignedShort();
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msg = new SocksCmdRequest(cmdType, addressType, host, port);
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break;
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}
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case UNKNOWN:
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break;
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}
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}
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}
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ctx.pipeline().remove(this);
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out.add(msg);
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}
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enum State {
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CHECK_PROTOCOL_VERSION,
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READ_CMD_HEADER,
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READ_CMD_ADDRESS
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}
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}
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