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116 lines
2.2 KiB
C++
116 lines
2.2 KiB
C++
#pragma once
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#include "mqtt_message.hpp"
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namespace acl {
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/**
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* mqtt message object for MQTT_PUBLISH type.
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*/
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class ACL_CPP_API mqtt_publish : public mqtt_message {
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public:
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/**
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* constructor for creating MQTT_PUBLISH mqtt message object.
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* @see mqtt_message
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*/
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mqtt_publish(void);
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/**
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* constructor for creating MQTT_PUBLISH mqtt message object.
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* @see mqtt_message
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*/
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mqtt_publish(const mqtt_header& header);
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~mqtt_publish(void);
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/**
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* set the message topic.
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* @param topic {const char*}
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* @return {mqtt_publish&}
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*/
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mqtt_publish& set_topic(const char* topic);
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/**
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* set the message id.
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* @param id {unsigned short} the value must > 0 && <= 65535.
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* @return {mqtt_publish&}
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*/
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mqtt_publish& set_pkt_id(unsigned short id);
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/**
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* set the message payload.
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* @param len {unsigned} the length of the payload.
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* @param data {const char*} the payload data.
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* @return {mqtt_publish&}
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*/
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mqtt_publish& set_payload(unsigned len, const char* data = NULL);
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/**
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* get the message's topic.
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* @return {const char*}
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*/
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const char* get_topic(void) const {
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return topic_.c_str();
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}
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/**
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* get the message's id.
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* @return {unsigned short} the message will be invalid if return 0.
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*/
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unsigned short get_pkt_id(void) const {
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return pkt_id_;
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}
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/**
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* get the length of the payload.
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* @return {unsigned}
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*/
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unsigned get_payload_len(void) const {
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return payload_len_;
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}
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/**
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* get the palyload.
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* @return {const string&}
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*/
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const string& get_payload(void) const {
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return payload_;
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}
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protected:
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// @override
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bool to_string(string& out);
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// @override
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int update(const char* data, int dlen);
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// @override
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bool finished(void) const {
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return finished_;
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}
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public:
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// the below methods were used internal to parse mqtt message
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// in streaming mode.
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int update_header_var(const char* data, int dlen);
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int update_topic_len(const char* data, int dlen);
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int update_topic_val(const char* data, int dlen);
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int update_pktid(const char* data, int dlen);
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int update_payload(const char* data, int dlen);
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private:
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unsigned status_;
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bool finished_;
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char buff_[2];
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int dlen_;
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unsigned hlen_var_;
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string topic_;
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unsigned short pkt_id_;
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unsigned payload_len_;
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string payload_;
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};
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} // namespace acl
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