associative_storage.cpp
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#include <iostream>
#include <map>
#include <exception>
#include <websocketpp/config/asio_no_tls.hpp>
#include <websocketpp/server.hpp>
typedef websocketpp::server<websocketpp::config::asio> server;
using websocketpp::connection_hdl;
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
struct connection_data {
int sessionid;
std::string name;
};
class print_server {
public:
print_server() : m_next_sessionid(1) {
m_server.init_asio();
m_server.set_open_handler(bind(&print_server::on_open,this,::_1));
m_server.set_close_handler(bind(&print_server::on_close,this,::_1));
m_server.set_message_handler(bind(&print_server::on_message,this,::_1,::_2));
}
void on_open(connection_hdl hdl) {
connection_data data;
data.sessionid = m_next_sessionid++;
data.name.clear();
m_connections[hdl] = data;
}
void on_close(connection_hdl hdl) {
connection_data& data = get_data_from_hdl(hdl);
std::cout << "Closing connection " << data.name
<< " with sessionid " << data.sessionid << std::endl;
m_connections.erase(hdl);
}
void on_message(connection_hdl hdl, server::message_ptr msg) {
connection_data& data = get_data_from_hdl(hdl);
if (data.name.empty()) {
data.name = msg->get_payload();
std::cout << "Setting name of connection with sessionid "
<< data.sessionid << " to " << data.name << std::endl;
} else {
std::cout << "Got a message from connection " << data.name
<< " with sessionid " << data.sessionid << std::endl;
}
}
connection_data& get_data_from_hdl(connection_hdl hdl) {
auto it = m_connections.find(hdl);
if (it == m_connections.end()) {
// this connection is not in the list. This really shouldn't happen
// and probably means something else is wrong.
throw std::invalid_argument("No data available for session");
}
return it->second;
}
void run(uint16_t port) {
m_server.listen(port);
m_server.start_accept();
m_server.run();
}
private:
typedef std::map<connection_hdl,connection_data,std::owner_less<connection_hdl>> con_list;
int m_next_sessionid;
server m_server;
con_list m_connections;
};
int main() {
print_server server;
server.run(9002);
}