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WebsocketClientImpl.cpp
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#include <../../libobs/obs-module.h>
#include "WebsocketClientImpl.h"
#include "json.hpp"
using json = nlohmann::json;
typedef websocketpp::config::asio_client::message_type::ptr message_ptr;
OBS_DECLARE_MODULE()
bool obs_module_load(void)
{
return true;
}
WEBSOCKETCLIENT_API WebsocketClient* createWebsocketClient(void)
{
return new WebsocketClientImpl();
}
WebsocketClientImpl::WebsocketClientImpl()
{
// Set logging to be pretty verbose (everything except message payloads)
client.set_access_channels(websocketpp::log::alevel::all);
client.clear_access_channels(websocketpp::log::alevel::frame_payload);
client.set_error_channels(websocketpp::log::elevel::all);
// Initialize ASIO
client.init_asio();
}
WebsocketClientImpl::~WebsocketClientImpl()
{
//Disconnect just in case
disconnect(false);
}
bool WebsocketClientImpl::connect(std::string url, std::string room, std::string username, std::string token, WebsocketClient::Listener* listener)
{
websocketpp::lib::error_code ec;
//reset loggin flag
logged = false;
try
{
// Register our message handler
client.set_message_handler( [=](websocketpp::connection_hdl con, message_ptr frame) {
const char* x = frame->get_payload().c_str();
//get response
auto msg = json::parse(frame->get_payload());
std::cout << x << std::endl << std::endl << std::endl ;
//Check if it is an event
if (msg.find("janus") == msg.end())
//Ignore
return;
std::string id = msg["janus"];
if (msg.find("ack") != msg.end()){
// Ignore
return;
}
//Get response
std::string response = msg["janus"];
if (msg.find("jsep") != msg.end())
{
std::string sdp = msg["jsep"]["sdp"];
listener->onOpened(sdp);
return;
}
//Check type
if (id.compare("success") == 0)
{
//Get transaction id
if (msg.find("transaction") == msg.end())
//Ignore
return;
if (msg.find("data") == msg.end()){
//Ignore
return;
}
//Get the Data session
auto data = msg["data"];
//Server is sending response twice, ingore second one
if (!logged)
{
//Get response code
session_id = data["id"];
//Launch logged event
//create handle command
json attachPlugin = {
{"janus", "attach" },
{"transaction", std::to_string(rand()) },
{"session_id", session_id},
{"plugin", "janus.plugin.videoroom"},
};
connection->send(attachPlugin.dump());
//Logged
logged = true;
}else {
handle_id = data["id"];
json joinRoom = {
{"janus", "message" },
{"transaction", std::to_string(rand())},
{"session_id", session_id},
{"handle_id", handle_id},
{ "body" ,
{
{ "room" , 1234 },
{"display" , "OBS"},
{"ptype" , "publisher"},
{"request" , "join"}
}
}
};
connection->send(joinRoom.dump());
listener->onLogged(session_id);
}
}
});
//When we are open
client.set_open_handler([=](websocketpp::connection_hdl con){
//Launch event
listener->onConnected();
//Login command
json login = {
{"janus", "create"},
{"transaction",std::to_string(rand()) },
{ "payload",
{
{ "username", username},
{ "token", token},
{ "room", room}
}
}
};
//Serialize and send
connection->send(login.dump());
});
//Set close hanlder
client.set_close_handler([=](...) {
//Call listener
listener->onDisconnected();
});
//Set failure handler
client.set_fail_handler([=](...) {
//Call listener
listener->onDisconnected();
});
//Register our tls hanlder
client.set_tls_init_handler([&](websocketpp::connection_hdl connection) {
//Create context
auto ctx = websocketpp::lib::make_shared<asio::ssl::context>(asio::ssl::context::tlsv1);
try {
ctx->set_options(asio::ssl::context::default_workarounds |
asio::ssl::context::no_sslv2 |
asio::ssl::context::single_dh_use);
}
catch (std::exception& e) {
std::cout << e.what() << std::endl;
}
return ctx;
});
//Get connection
connection = client.get_connection(url, ec);
if (ec) {
std::cout << "could not create connection because: " << ec.message() << std::endl;
return 0;
}
connection->add_subprotocol("janus-protocol");
// Note that connect here only requests a connection. No network messages are
// exchanged until the event loop starts running in the next line.
client.connect(connection);
//Async
thread = std::thread([&]() {
// Start the ASIO io_service run loop
// this will cause a single connection to be made to the server. c.run()
// will exit when this connection is closed.
client.run();
});
}
catch (websocketpp::exception const & e) {
std::cout << e.what() << std::endl;
return false;
}
//OK
return true;
}
bool WebsocketClientImpl::open(const std::string &sdp)
{
try
{
//Login command
json open = {
{ "janus" , "message" },
{ "session_id" , session_id},
{ "handle_id" , handle_id},
{ "transaction" , std::to_string(rand()) },
{ "body" ,
{
{ "request" ,"configure" },
{"muted", false},
{"video", true},
{"audio", true},
}
},
{ "jsep" ,
{
{ "type" ,"offer" },
{"sdp" ,sdp},
{"trickle",true},
}
}
};
//Serialize and send
if (connection->send(open.dump()))
return false;
}
catch (websocketpp::exception const & e) {
std::cout << e.what() << std::endl;
return false;
}
//OK
return true;
}
bool WebsocketClientImpl::trickle(const std::string &mid, int index, const std::string &candidate, bool last)
{
try
{
//Check if it is last
if (!last)
{
//Login command
json trickle = {
{ "janus" , "trickle" },
{ "handle_id" , handle_id },
{ "session_id" , session_id },
{ "transaction" , "trickle" + std::to_string(rand()) },
{ "candidate" ,
{
{ "sdpMid" , mid },
{ "sdpMLineIndex" , index } ,
{ "candidate" , candidate }
}
}
};
//Serialize and send
if (connection->send(trickle.dump()))
return false;
//OK
return true;
}
else
{
json trickle = {
{ "janus" , "trickle" },
{ "handle_id" , handle_id },
{ "session_id" , session_id },
{ "transaction" , "trickle" + std::to_string(rand()) },
{ "candidate" ,
{
{ "completed", true },
}
}
};
if (connection->send(trickle.dump()))
return false;
}
}
catch (websocketpp::exception const & e) {
std::cout << e.what() << std::endl;
return false;
}
//OK
return true;
}
bool WebsocketClientImpl::disconnect(bool wait)
{
try
{
// Stop keepAlive
//Stop client
client.close(connection, websocketpp::close::status::normal, std::string("disconnect"));
client.stop();
//Don't wait for connection close
if (thread.joinable())
{
//If sswe have to wait
if (wait) {
thread.join();
}
else {
//Remov hanlders
client.set_open_handler([](...){});
client.set_close_handler([](...){});
client.set_fail_handler([](...) {});
//Detach trhead
thread.detach();
}
}
}
catch (websocketpp::exception const & e) {
std::cout << e.what() << std::endl;
return false;
}
//OK
return true;
}