Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
cn.wizzer.iot.mqtt.server.broker.protocol.Connect Maven / Gradle / Ivy
/**
* Copyright (c) 2018, Mr.Wang ([email protected] ) All rights reserved.
*/
package cn.wizzer.iot.mqtt.server.broker.protocol;
import cn.hutool.core.util.StrUtil;
import cn.wizzer.iot.mqtt.server.broker.config.BrokerProperties;
import cn.wizzer.iot.mqtt.server.common.auth.IAuthService;
import cn.wizzer.iot.mqtt.server.common.message.DupPubRelMessageStore;
import cn.wizzer.iot.mqtt.server.common.message.DupPublishMessageStore;
import cn.wizzer.iot.mqtt.server.common.message.IDupPubRelMessageStoreService;
import cn.wizzer.iot.mqtt.server.common.message.IDupPublishMessageStoreService;
import cn.wizzer.iot.mqtt.server.common.session.ISessionStoreService;
import cn.wizzer.iot.mqtt.server.common.session.SessionStore;
import cn.wizzer.iot.mqtt.server.common.subscribe.ISubscribeStoreService;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelId;
import io.netty.channel.group.ChannelGroup;
import io.netty.handler.codec.mqtt.*;
import io.netty.handler.timeout.IdleStateHandler;
import io.netty.util.AttributeKey;
import io.netty.util.CharsetUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.Map;
/**
* CONNECT连接处理
*/
public class Connect {
private static final Logger LOGGER = LoggerFactory.getLogger(Connect.class);
private ISessionStoreService sessionStoreService;
private ISubscribeStoreService subscribeStoreService;
private IDupPublishMessageStoreService dupPublishMessageStoreService;
private IDupPubRelMessageStoreService dupPubRelMessageStoreService;
private IAuthService authService;
private BrokerProperties brokerProperties;
private ChannelGroup channelGroup;
private Map channelIdMap;
public Connect(ISessionStoreService sessionStoreService, ISubscribeStoreService subscribeStoreService, IDupPublishMessageStoreService dupPublishMessageStoreService, IDupPubRelMessageStoreService dupPubRelMessageStoreService, IAuthService authService, BrokerProperties brokerProperties,ChannelGroup channelGroup,Map channelIdMap) {
this.sessionStoreService = sessionStoreService;
this.subscribeStoreService = subscribeStoreService;
this.dupPublishMessageStoreService = dupPublishMessageStoreService;
this.dupPubRelMessageStoreService = dupPubRelMessageStoreService;
this.authService = authService;
this.brokerProperties = brokerProperties;
this.channelGroup=channelGroup;
this.channelIdMap=channelIdMap;
}
public void processConnect(Channel channel, MqttConnectMessage msg) {
// 消息解码器出现异常
if (msg.decoderResult().isFailure()) {
Throwable cause = msg.decoderResult().cause();
if (cause instanceof MqttUnacceptableProtocolVersionException) {
// 不支持的协议版本
MqttConnAckMessage connAckMessage = (MqttConnAckMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.CONNACK, false, MqttQoS.AT_MOST_ONCE, false, 0),
new MqttConnAckVariableHeader(MqttConnectReturnCode.CONNECTION_REFUSED_UNACCEPTABLE_PROTOCOL_VERSION, false), null);
channel.writeAndFlush(connAckMessage);
channel.close();
return;
} else if (cause instanceof MqttIdentifierRejectedException) {
// 不合格的clientId
MqttConnAckMessage connAckMessage = (MqttConnAckMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.CONNACK, false, MqttQoS.AT_MOST_ONCE, false, 0),
new MqttConnAckVariableHeader(MqttConnectReturnCode.CONNECTION_REFUSED_IDENTIFIER_REJECTED, false), null);
channel.writeAndFlush(connAckMessage);
channel.close();
return;
}
channel.close();
return;
}
// clientId为空或null的情况, 这里要求客户端必须提供clientId, 不管cleanSession是否为1, 此处没有参考标准协议实现
if (StrUtil.isBlank(msg.payload().clientIdentifier())) {
MqttConnAckMessage connAckMessage = (MqttConnAckMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.CONNACK, false, MqttQoS.AT_MOST_ONCE, false, 0),
new MqttConnAckVariableHeader(MqttConnectReturnCode.CONNECTION_REFUSED_IDENTIFIER_REJECTED, false), null);
channel.writeAndFlush(connAckMessage);
channel.close();
return;
}
if (brokerProperties.getMqttPasswordMust()) {
// 用户名和密码验证, 这里要求客户端连接时必须提供用户名和密码, 不管是否设置用户名标志和密码标志为1, 此处没有参考标准协议实现
String username = msg.payload().userName();
String password = msg.payload().passwordInBytes() == null ? null : new String(msg.payload().passwordInBytes(), CharsetUtil.UTF_8);
if (!authService.checkValid(username, password)) {
MqttConnAckMessage connAckMessage = (MqttConnAckMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.CONNACK, false, MqttQoS.AT_MOST_ONCE, false, 0),
new MqttConnAckVariableHeader(MqttConnectReturnCode.CONNECTION_REFUSED_BAD_USER_NAME_OR_PASSWORD, false), null);
channel.writeAndFlush(connAckMessage);
channel.close();
return;
}
}
// 如果会话中已存储这个新连接的clientId, 就关闭之前该clientId的连接
if (sessionStoreService.containsKey(msg.payload().clientIdentifier())) {
SessionStore sessionStore = sessionStoreService.get(msg.payload().clientIdentifier());
Boolean cleanSession = sessionStore.isCleanSession();
if (cleanSession) {
sessionStoreService.remove(msg.payload().clientIdentifier());
subscribeStoreService.removeForClient(msg.payload().clientIdentifier());
dupPublishMessageStoreService.removeByClient(msg.payload().clientIdentifier());
dupPubRelMessageStoreService.removeByClient(msg.payload().clientIdentifier());
}
try {
ChannelId channelId = channelIdMap.get(sessionStore.getChannelId());
if(channelId!=null) {
Channel previous = channelGroup.find(channelId);
if (previous != null) previous.close();
}
}catch (Exception e){
e.printStackTrace();
}
}
// 处理遗嘱信息
SessionStore sessionStore = new SessionStore(msg.payload().clientIdentifier(), channel.id().asShortText(), msg.variableHeader().isCleanSession(), null);
if (msg.variableHeader().isWillFlag()) {
MqttPublishMessage willMessage = (MqttPublishMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.PUBLISH, false, MqttQoS.valueOf(msg.variableHeader().willQos()), msg.variableHeader().isWillRetain(), 0),
new MqttPublishVariableHeader(msg.payload().willTopic(), 0), Unpooled.buffer().writeBytes(msg.payload().willMessageInBytes()));
sessionStore.setWillMessage(willMessage);
}
// 处理连接心跳包
if (msg.variableHeader().keepAliveTimeSeconds() > 0) {
if (channel.pipeline().names().contains("idle")) {
channel.pipeline().remove("idle");
}
channel.pipeline().addFirst("idle", new IdleStateHandler(0, 0, Math.round(msg.variableHeader().keepAliveTimeSeconds() * 1.5f)));
}
// 至此存储会话信息及返回接受客户端连接
sessionStoreService.put(msg.payload().clientIdentifier(), sessionStore);
// 将clientId存储到channel的map中
channel.attr(AttributeKey.valueOf("clientId")).set(msg.payload().clientIdentifier());
Boolean sessionPresent = sessionStoreService.containsKey(msg.payload().clientIdentifier()) && !msg.variableHeader().isCleanSession();
MqttConnAckMessage okResp = (MqttConnAckMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.CONNACK, false, MqttQoS.AT_MOST_ONCE, false, 0),
new MqttConnAckVariableHeader(MqttConnectReturnCode.CONNECTION_ACCEPTED, sessionPresent), null);
channel.writeAndFlush(okResp);
LOGGER.debug("CONNECT - clientId: {}, cleanSession: {}", msg.payload().clientIdentifier(), msg.variableHeader().isCleanSession());
// 如果cleanSession为0, 需要重发同一clientId存储的未完成的QoS1和QoS2的DUP消息
if (!msg.variableHeader().isCleanSession()) {
List dupPublishMessageStoreList = dupPublishMessageStoreService.get(msg.payload().clientIdentifier());
List dupPubRelMessageStoreList = dupPubRelMessageStoreService.get(msg.payload().clientIdentifier());
dupPublishMessageStoreList.forEach(dupPublishMessageStore -> {
MqttPublishMessage publishMessage = (MqttPublishMessage) MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.PUBLISH, true, MqttQoS.valueOf(dupPublishMessageStore.getMqttQoS()), false, 0),
new MqttPublishVariableHeader(dupPublishMessageStore.getTopic(), dupPublishMessageStore.getMessageId()), Unpooled.buffer().writeBytes(dupPublishMessageStore.getMessageBytes()));
channel.writeAndFlush(publishMessage);
});
dupPubRelMessageStoreList.forEach(dupPubRelMessageStore -> {
MqttMessage pubRelMessage = MqttMessageFactory.newMessage(
new MqttFixedHeader(MqttMessageType.PUBREL, true, MqttQoS.AT_MOST_ONCE, false, 0),
MqttMessageIdVariableHeader.from(dupPubRelMessageStore.getMessageId()), null);
channel.writeAndFlush(pubRelMessage);
});
}
}
}
