CORS setting

[sasmaster]

Hi. I am having some issues with Chrome's security when delivering video content in my test env to the web browser.Some of the suggestions I get to solve my issue is to reconfigure CORS in the header to allow all origins. That's setting with Access-Control-Allow-Origin: * . Is it something that can be configured on TCP socket header level? If yes,how?

Thanks.

[zaphoyd]

TCP socket level, no, but the WebSocket handshake can return HTTP headers which can be used to carry the CORS information. In your WebSocket++ validate handler, use connection::append_header (https://docs.websocketpp.org/classwebsocketpp_1_1connection.html#af8cb78acc61b8a3d59f6162cdba6318b) or connection::replace_header (https://docs.websocketpp.org/classwebsocketpp_1_1connection.html#a96e4adcdb9b3473ca96e2aac27ff7147) as appropriate.

[ArosPrince]

I tried to do this, but the validate_handler never gets called. I must be missing something:

bool validate(server* s, websocketpp::connection_hdl connection) {
	s->get_con_from_hdl(connection)->append_header("Access-Control-Allow-Origin", "*");	
	return true;
}

WebsocketServer::WebsocketServer() {
	m_server.init_asio();

	m_server.set_open_handler(bind(&WebsocketServer::on_open, this, ::_1));
	m_server.set_close_handler(bind(&WebsocketServer::on_close, this, ::_1));
	m_server.set_message_handler(bind(&WebsocketServer::on_message, this, ::_1, ::_2));

	m_server.set_validate_handler(bind(&validate, &m_server, ::_1));

	createThread([this](const std::string& content) {
		for (auto it : m_connections) {
			m_server.send(it, content, websocketpp::frame::opcode::value::text);
		}
	});

	run(3001);
}

I am getting this kind of messages in the console when I try to connect:

[2018-12-18 15:09:39] [error] Handshake ended with HTTP error: 426
[2018-12-18 15:09:39] [fail] WebSocket Connection [::ffff:127.0.0.1]:57762 v0 "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0" /socket.io/?EIO=3&transport=polling&t=MV1ffJg 426 websocketpp:28 Upgrade required

[xinthose]

Hello. Did you ever get CORS to work?

[wang01234]

websocket_server::connection_ptr con = wsServer->get_con_from_hdl(hdl); con->append_header("access-control-allow-origin", "*");

[wang01234]

client::connection_ptr con = echo_client.get_connection( uri, ec ); con->append_header("access-control-allow-origin", "*"); echo_client.connect( con );