319 lines
9.3 KiB
C++
319 lines
9.3 KiB
C++
#include "mqtt.hpp"
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#include "logger.hpp"
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#include <sstream>
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#include <cstring>
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namespace custom {
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MqttClient::MqttClient(const std::string& broker, int port, const std::string& clientId)
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: clientId_(clientId), connected_(false), reconnecting_(false),
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processorRunning_(false), shouldReconnect_(true) {
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std::stringstream ss;
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ss << "tcp://" << broker << ":" << port;
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serverURI_ = ss.str();
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connOpts_ = MQTTClient_connectOptions_initializer;
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connOpts_.keepAliveInterval = 20;
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connOpts_.cleansession = 1;
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connOpts_.reliable = 0; // 异步发送
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int rc = MQTTClient_create(&client_, serverURI_.c_str(), clientId_.c_str(),
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MQTTCLIENT_PERSISTENCE_NONE, nullptr);
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if (rc != MQTTCLIENT_SUCCESS) {
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LOG_ERROR("Failed to create MQTT client, return code: " + std::to_string(rc));
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return;
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}
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MQTTClient_setCallbacks(client_, this, connectionLostCallback,
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messageArrivedCallback, deliveryCompleteCallback);
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}
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MqttClient::~MqttClient() {
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shouldReconnect_ = false;
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stopMessageProcessor();
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disconnect();
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if (reconnectThread_.joinable()) {
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reconnectThread_.join();
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}
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// 销毁 MQTT 客户端
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if (client_) {
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MQTTClient_destroy(&client_);
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}
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}
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bool MqttClient::connect(const std::string& username, const std::string& password) {
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username_ = username;
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password_ = password;
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// 验证字符串是否为有效UTF-8（实际上确保为ASCII以避免问题）
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auto isValidMqttString = [](const std::string& str) -> bool {
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for (unsigned char c : str) {
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if (c > 127) { // 非ASCII字符
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return false;
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}
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if (c < 32 && c != '\t' && c != '\n' && c != '\r') { // 控制字符（除了常见的空白字符）
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return false;
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}
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}
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return true;
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};
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if (!isValidMqttString(username_)) {
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LOG_ERROR("Username contains invalid characters");
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return false;
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}
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if (!isValidMqttString(password_)) {
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LOG_ERROR("Password contains invalid characters");
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return false;
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}
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connOpts_ = MQTTClient_connectOptions_initializer;
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connOpts_.keepAliveInterval = 20;
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connOpts_.cleansession = 1;
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connOpts_.reliable = 0;
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if (!username_.empty()) {
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connOpts_.username = username_.c_str();
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if (!password_.empty()) {
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connOpts_.password = password_.c_str();
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}
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}
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int rc = MQTTClient_connect(client_, &connOpts_);
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if (rc != MQTTCLIENT_SUCCESS) {
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LOG_ERROR("Failed to connect to MQTT broker, return code: " + std::to_string(rc));
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switch (rc) {
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case 1:
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LOG_ERROR("Connection refused: unacceptable protocol version");
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break;
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case 2:
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LOG_ERROR("Connection refused: identifier rejected");
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break;
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case 3:
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LOG_ERROR("Connection refused: server unavailable");
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break;
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case 4:
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LOG_ERROR("Connection refused: bad user name or password (UTF-8 encoding issue)");
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break;
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case 5:
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LOG_ERROR("Connection refused: not authorized");
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break;
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default:
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LOG_ERROR("Connection error: code " + std::to_string(rc));
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break;
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}
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return false;
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}
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connected_ = true;
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LOG_INFO("Connected to MQTT broker successfully");
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return true;
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}
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void MqttClient::disconnect() {
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if (client_ && MQTTClient_isConnected(client_)) {
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LOG_INFO("Disconnecting from MQTT broker");
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int rc = MQTTClient_disconnect(client_, 5000); // 5 seconds timeout
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if (rc != MQTTCLIENT_SUCCESS) {
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LOG_ERROR("Failed to disconnect from MQTT broker, return code: " + std::to_string(rc));
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}
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connected_ = false;
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}
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}
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bool MqttClient::isConnected() const {
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return connected_ && client_ && MQTTClient_isConnected(client_);
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}
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bool MqttClient::subscribe(const std::string& topic, int qos) {
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if (!isConnected()) {
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LOG_ERROR("Cannot subscribe: not connected to MQTT broker");
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return false;
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}
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LOG_INFO("Subscribing to topic: " + topic);
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int rc = MQTTClient_subscribe(client_, topic.c_str(), qos);
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if (rc != MQTTCLIENT_SUCCESS) {
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LOG_ERROR("Failed to subscribe to topic: " + topic + ", return code: " + std::to_string(rc));
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return false;
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}
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return true;
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}
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bool MqttClient::unsubscribe(const std::string& topic) {
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if (!isConnected()) {
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LOG_ERROR("Cannot unsubscribe: not connected to MQTT broker");
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return false;
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}
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LOG_INFO("Unsubscribing from topic: " + topic);
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int rc = MQTTClient_unsubscribe(client_, topic.c_str());
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if (rc != MQTTCLIENT_SUCCESS) {
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LOG_ERROR("Failed to unsubscribe from topic: " + topic + ", return code: " + std::to_string(rc));
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return false;
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}
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return true;
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}
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bool MqttClient::publish(const std::string& topic, const std::string& payload, int qos, bool retain) {
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if (!isConnected()) {
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LOG_ERROR("Cannot publish: not connected to MQTT broker");
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return false;
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}
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MQTTClient_message message = MQTTClient_message_initializer;
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message.payload = const_cast<char*>(payload.c_str());
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message.payloadlen = payload.length();
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message.qos = qos;
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message.retained = retain ? 1 : 0;
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MQTTClient_deliveryToken token;
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int rc = MQTTClient_publishMessage(client_, topic.c_str(), &message, &token);
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if (rc != MQTTCLIENT_SUCCESS) {
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LOG_ERROR("Failed to publish message to topic: " + topic + ", return code: " + std::to_string(rc));
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return false;
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}
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return true;
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}
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bool MqttClient::publishJson(const std::string& topic, const nlohmann::json& json, int qos, bool retain) {
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return publish(topic, json.dump(), qos, retain);
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}
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void MqttClient::setMessageCb(MessageCb cb) {
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messageCb_ = cb;
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}
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void MqttClient::setConnectionCb(ConnectionCb cb) {
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connectionCb_ = cb;
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}
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void MqttClient::startMessageProcessor() {
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if (processorRunning_) {
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return;
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}
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processorRunning_ = true;
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messageProcessor_ = std::thread(&MqttClient::processMessageQueue, this);
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}
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void MqttClient::stopMessageProcessor() {
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if (!processorRunning_) {
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return;
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}
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processorRunning_ = false;
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queueCondition_.notify_all();
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if (messageProcessor_.joinable()) {
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messageProcessor_.join();
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}
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LOG_INFO("MQTT message processor stopped");
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}
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void MqttClient::processMessageQueue() {
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while (processorRunning_) {
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std::unique_lock<std::mutex> lock(queueMutex_);
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queueCondition_.wait(lock, [this] {
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return !messageQueue_.empty() || !processorRunning_;
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});
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while (!messageQueue_.empty() && processorRunning_) {
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auto message = messageQueue_.front();
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messageQueue_.pop();
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lock.unlock();
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if (messageCb_) {
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try {
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messageCb_(message.topic, message.payload);
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} catch (const std::exception& e) {
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LOG_ERROR("Exception in message callback: " + std::string(e.what()));
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}
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}
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lock.lock();
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}
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}
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}
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int MqttClient::messageArrivedCallback(void* context, char* topicName, int topicLen, MQTTClient_message* message) {
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MqttClient* client = static_cast<MqttClient*>(context);
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std::string topic(topicName);
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std::string payload(static_cast<char*>(message->payload), message->payloadlen);
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QueuedMessage queuedMsg;
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queuedMsg.topic = topic;
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queuedMsg.payload = payload;
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{
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std::lock_guard<std::mutex> lock(client->queueMutex_);
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client->messageQueue_.push(queuedMsg);
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}
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client->queueCondition_.notify_one();
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MQTTClient_freeMessage(&message);
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MQTTClient_free(topicName);
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return 1;
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}
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void MqttClient::connectionLostCallback(void* context, char* cause) {
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MqttClient* client = static_cast<MqttClient*>(context);
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client->handleConnectionLost();
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std::string causeStr = cause ? std::string(cause) : "Unknown reason";
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LOG_WARN("MQTT connection lost: " + causeStr);
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}
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void MqttClient::deliveryCompleteCallback(void* context, MQTTClient_deliveryToken dt) {
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}
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void MqttClient::handleConnectionLost() {
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connected_ = false;
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if (connectionCb_) {
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connectionCb_(false);
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}
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if (shouldReconnect_ && !reconnecting_) {
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reconnecting_ = true;
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reconnectThread_ = std::thread(&MqttClient::reconnectWorker, this);
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}
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}
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void MqttClient::handleConnectionEstablished() {
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connected_ = true;
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reconnecting_ = false;
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LOG_INFO("MQTT connection established");
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if (connectionCb_) {
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connectionCb_(true);
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}
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}
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void MqttClient::reconnectWorker() {
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while (shouldReconnect_ && !connected_) {
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LOG_INFO("Attempting to reconnect to MQTT broker...");
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if (connect(username_, password_)) {
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LOG_INFO("Successfully reconnected to MQTT broker");
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break;
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}
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std::this_thread::sleep_for(std::chrono::seconds(reconnectDelay_));
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}
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reconnecting_ = false;
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}
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} // namespace custom
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