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pablitto_sub.cpp
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pablitto_sub.cpp
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#include <iostream>
#include <regex>
#include "include/pablittoMQTT.hh"
#include "include/utilities.hh"
#include <signal.h>
template<typename T> std::string toString(const T& t);
void signal_callback_handler(int signum);
void show_help_sub();
int analyze_arguments_sub(std::vector<string> args, std::string& client_id, std::string& broker_address, int& port, std::string& topic, int& qos, bool& debug, int& keep_alive);
int target(byte_t return_code, std::string client_id, std::vector<byte_t> str_bytes, std::string topic, int qos, PablittoMQTT& mqtt_client);
int main(int argc, char* argv[]){
std::string broker_address="127.0.0.1";
int port=1883;
std::string topic;
std::string msg;
int qos=0;
int keep_alive=60;
bool debug=false;
time_t current_time;
current_time=time(NULL);
std::string client_id="pablittosub-id"+toString(current_time);
std::vector<string> args(argv+1, argv+argc);
try {
analyze_arguments_sub(args, client_id, broker_address, port, topic, qos, debug, keep_alive);
} catch (const char * msg){
std::cerr<<msg<<std::endl;
return -1;
}
PablittoMQTT mqtt_client(broker_address, port);
try {
mqtt_client.start(debug);
byte_t return_code=mqtt_client.connectMQTT(client_id, keep_alive);
std::vector<byte_t> str_bytes(msg.begin(), msg.end());
target(return_code, client_id, str_bytes, topic, qos, mqtt_client);
} catch(const char* msg){
std::cerr<<msg<<std::endl;
return -1;
}
return 0;
}
int target(byte_t return_code, std::string client_id, std::vector<byte_t> str_bytes, std::string topic, int qos, PablittoMQTT& mqtt_client){
switch(return_code){
case CONNECTION_ACCEPTED:
std::cout<<"Client "<<client_id<<std::endl;
signal(SIGINT, signal_callback_handler);
mqtt_client.subscribe(topic, qos);
while(true){
std::pair<std::string, std::vector<byte_t>> message=mqtt_client.get_message();
std::string topic=message.first;
std::vector<byte_t> payload=message.second;
if (!topic.empty()){
std::cout<<"Topic="<<topic<<std::endl;
std::string str_bytes(payload.begin(), payload.end());
std::cout<<"Message Received="<<str_bytes<<std::endl;
}
}
return 1;
case UNACCEPTABLE_PROTOCOL_VERSION:
std::cout<<"unacceptable protocol version"<<std::endl;
break;
case SERVER_UNAVAILABLE:
std::cout<<"server unavailable"<<std::endl;
break;
case BAD_USERNAME_PASSWORD:
std::cout<<"bad username or password"<<std::endl;
break;
case NOTHING_RESPONSE:
std::cout<<"Nothing response by broker"<<std::endl;
break;
case IDENTIFIER_REJECTED:
std::cout<<"Identifier Rejected"<<std::endl;
break;
case NOT_AUTHORIZED:
std::cout<<"Not Authorized"<<std::endl;
break;
default:
std::cout<<"Reserved for future use"<<std::endl;
break;
}
return -1;
}
void show_help_sub(){
std::cout<<"PABLITTO"<<std::endl;
std::cout<<"pablitto_sub help"<<std::endl;
std::cout<<"[-p port] to select port number"<<std::endl;
std::cout<<"[-h broker_address] to select ip address"<<std::endl;
std::cout<<"[-t topic] to enter topic_name"<<std::endl;
std::cout<<"[-q qos]"<<std::endl;
std::cout<<"[-k keep alive] to enter time-interval of heartbeat"<<std::endl;
std::cout<<"[-id client_id]"<<std::endl;
std::cout<<"[-d debug]"<<std::endl;
}
int analyze_arguments_sub(std::vector<string> args, std::string& client_id, std::string& broker_address, int& port, std::string& topic, int& qos, bool& debug, int& keep_alive){
if (args.size()<=0) {
throw "Use pablitto_sub --help to see usage";
}
if (args.back()=="-p" || args.back()=="-h" || args.back()=="-t" || args.back()=="-q" || args.back()=="-p" || args.back()=="-id" || args.back()=="-k") {
throw "Unkown Arguments, Use pablitto_sub --help to see usage";
}
vector<string>::iterator element;
for(element=args.begin(); element!=args.end(); element++){
if(*element=="--help"){
show_help_sub();
throw "";
}
if(*element=="-p"){
string str_port=*++element;
if (regex_match(str_port, regex("[0-9]*"))){
port=atoi(str_port.data());
} else{
throw "port is not a number";
}
}
if(*element=="-h"){
broker_address=*++element;
}
if(*element=="-t"){
topic=*++element;
}
if(*element=="-q"){
string str_qos=*++element;
if (regex_match(str_qos, regex("[0-2]"))){
qos=atoi(str_qos.data());
if(qos==2){
throw "QoS 2 is not yet implemented";
}
} else{
throw "Error: QoS is not valid";
}
}
if(*element=="-id"){
client_id=*++element;
}
if(*element=="-d"){
debug=true;
}
if(*element=="-k"){
string str_keep_alive=*++element;
bool match=regex_match(str_keep_alive, regex("[0-9]*"));
int tmp=atoi(str_keep_alive.data());
if (match && (tmp>=0 && tmp<65536)){
keep_alive=tmp;
} else{
throw "Error: keep_alive is not valid";
}
}
}
return 1;
}
template<typename T>
std::string toString(const T& t) {
std::ostringstream oss;
oss << t;
return oss.str();
}
void signal_callback_handler(int signum) {
std::clog<< "DISCONNECT: Sending" <<std::endl;
exit(1);
}