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/** @file
* \brief Fichero de implementación de un cliente
* \author Imanol Barba Sabariego
* \date 13/06/2013
*
* En este fichero se implementa un cliente para poder usar con el servidor creado, usando la clase Socket.
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* REVISADO EL 10/12/2013 PARA LA APLIACIÓN JCHAT
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*/
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#include "client.h"
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using namespace std;
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//! Variable de estado del programa.
bool connected;
//! Variable de estado del programa.
bool finished;
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//! Método de liberación de los argumentos
/*! Este método se encarga de liberar la memoria asignada a los argumentos pasados a los threads que ahora han terminado. */
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void killThread(thread_args *t_arg)
{
if(t_arg != 0)
{
delete t_arg;
t_arg = 0;
}
pthread_exit(NULL);
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}
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//! Método de conexión
/*! Este método conecta el cliente a una sala de chat. */
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bool connect(Socket& s)
{
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string host, nick, response;
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int port;
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cout << "Hostname: ";
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getline(cin,host);
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cout << "Port: ";
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cin >> port;
cin.ignore();
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cout << "Nickname: ";
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getline(cin,nick);
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try
{
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s.Create();
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s.Connect(host,port);
cout << "Connected" << endl;
connected = true;
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s << nick;
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s >> response;
while(response == "CHATNICKINVALID")
{
cout << "Spaces not allowed in nicknames, please enter another nickname: ";
getline(cin,nick);
s << nick;
s >> response;
}
while(response == "CHATNICKEXIST")
{
cout << "Nickname in use, please enter another nickname: ";
getline(cin,nick);
s << nick;
s >> response;
}
while(response == "CHATFULL")
{
cout << "Chatroom is full, please wait..." << endl;
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s.Close();
return false;
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}
if(response != "CHATOK")
{
cout << "Error: " << response << endl;
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s.Close();
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return false;
}
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}
catch(SocketException& e)
{
cout << e.description() << endl;
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exit(-1);
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}
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return true;
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}
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//! Thread de envío de mensajes
/*! Este método es ejecutado por un thread con el objetivo de enviar los mensajes y comandos que el usuario introduce por teclado. */
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void* sendThread(void* args)
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{
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string send;
struct thread_args *t_arg = (struct thread_args*)args;
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while(connected)
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{
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cout << "> ";
getline(cin,send);
if(cin.eof())
{
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send = "/exit";
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}
try
{
*(t_arg->s) << send;
if(send == "/disconnect" || send == "/exit")
{
break;
}
}
catch(SocketException& e)
{
cout << e.description() << endl;
}
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}
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killThread(t_arg);
}
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//! Thread de recepción de mensajes
/*! Este método es ejecutado por un thread con el objetivo de recibir los mensajes por el socket, gestionarlos e imprimirlos por pantalla o tomar las medidas necesarias .*/
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void* recvThread(void* args)
{
string recv;
struct thread_args *t_arg = (struct thread_args*)args;
while(true)
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{
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try
{
*(t_arg->s) >> recv;
}
catch(SocketException &e)
{
connected = false;
cout << e.description() << endl;
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cout << "Connection lost. Press Enter to retry connection to chatroom. Press CTRL+C to exit." << endl;
pthread_cond_signal(t_arg->condition);
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break;
}
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if(recv == "DISC_OK")
{
cout << "Disconnecting" << endl;
connected = false;
pthread_cond_signal(t_arg->condition);
break;
}
else if(recv == "EXIT_OK")
{
cout << "Exiting" << endl;
connected = false;
finished = true;
pthread_cond_signal(t_arg->condition);
break;
}
else
{
cout << recv << endl;
}
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}
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killThread(t_arg);
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}
//! Método principal del cliente
/*! Este método inicializa el Socket, establece la conexión y realiza las acciones que se le hayan programado para comunicarse con el servidor.*/
int main()
{
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//signal(SIGPIPE, exitClient); UNUSED
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Socket s;
connected = finished = false;
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pthread_mutex_t mutex;
pthread_mutex_init(&mutex,0);
pthread_cond_t condition;
pthread_cond_init(&condition,0);
pthread_t recv, send;
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pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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int retries = 3;
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while (!finished)
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{
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while(!connect(s))
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{
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if((--retries) <= 0)
{
cout << "Exiting" << endl;
exit(-1);
}
cout << "Couldn't connect to chatroom, retrying..." << endl;
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}
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pthread_mutex_lock(&mutex);
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thread_args *sArgs = new thread_args;
thread_args *rArgs = new thread_args;
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sArgs->mutex = &mutex;
sArgs->condition = &condition;
sArgs->s = &s;
rArgs->mutex = &mutex;
rArgs->condition = &condition;
rArgs->s = &s;
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pthread_create(&send,&attr,sendThread,(void *)sArgs);
pthread_create(&recv,&attr,recvThread,(void *)rArgs);
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while(connected)
{
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pthread_cond_wait(&condition,&mutex);
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}
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pthread_mutex_unlock(&mutex);
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pthread_join(recv,NULL);
pthread_join(send,NULL);
s.Close();
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}
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pthread_cond_destroy(&condition);
pthread_mutex_destroy(&mutex);
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}
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