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#include <websocketpp/config/core.hpp>
#include <websocketpp/server.hpp>
#include <iostream>
#include <fstream>
typedef websocketpp::server<websocketpp::config::core> server;
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
// pull out the type of messages sent by our config
typedef server::message_ptr message_ptr;
// Define a callback to handle incoming messages
void on_message(server* s, websocketpp::connection_hdl hdl, message_ptr msg) {
if (msg->get_opcode() == websocketpp::frame::opcode::text) {
s->get_alog().write(websocketpp::log::alevel::app,
"Text Message Received: "+msg->get_payload());
} else {
s->get_alog().write(websocketpp::log::alevel::app,
"Binary Message Received: "+websocketpp::utility::to_hex(msg->get_payload()));
}
try {
s->send(hdl, msg->get_payload(), msg->get_opcode());
} catch (websocketpp::exception const & e) {
s->get_alog().write(websocketpp::log::alevel::app,
std::string("Echo Failed: ")+e.what());
}
}
int main() {
server s;
std::ofstream log;
try {
// set up access channels to only log interesting things
s.clear_access_channels(websocketpp::log::alevel::all);
s.set_access_channels(websocketpp::log::alevel::connect);
s.set_access_channels(websocketpp::log::alevel::disconnect);
s.set_access_channels(websocketpp::log::alevel::app);
// Log to a file rather than stdout, as we are using stdout for real
// output
log.open("output.log");
s.get_alog().set_ostream(&log);
s.get_elog().set_ostream(&log);
// print all output to stdout
s.register_ostream(&std::cout);
// Register our message handler
s.set_message_handler(bind(&on_message,&s,::_1,::_2));
server::connection_ptr con = s.get_connection();
con->start();
// C++ iostream's don't support the idea of asynchronous i/o. As such
// there are two input strategies demonstrated here. Buffered I/O will
// read from stdin in chunks until EOF. This works very well for
// replaying canned connections as would be done in automated testing.
//
// If the server is being used live however, assuming input is being
// piped from elsewhere in realtime, this strategy will result in small
// messages being buffered forever. The non-buffered strategy below
// reads characters from stdin one at a time. This is inefficient and
// for more serious uses should be replaced with a platform specific
// asyncronous i/o technique like select, poll, IOCP, etc
bool buffered_io = false;
if (buffered_io) {
std::cin >> *con;
con->eof();
} else {
char a;
while(std::cin.get(a)) {
con->read_some(&a,1);
}
con->eof();
}
} catch (websocketpp::exception const & e) {
std::cout << e.what() << std::endl;
}
log.close();
}
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