How to send consecutive data?

[Mike4Feet]

Hi，
Fisrt of all，My english is very poor，I sincerely hope you can understand what i wrote and give me some precious advice.

I wanna send some consecutive message(like video/audio data).
pseudocode is as follows:

.message = [](auto*ws, std::string_view message, uWS::OpCode opCode) {
    while(flag) {
        ws->send(std::string_view(videoData(), dataSize()), OpCode::BINARY);
    }
},
.close = [](auto *ws/*ws*/, int /*code*/, std::string_view /*message*/) {
    flag = false;
}

I know the library is single threaded, so when i send consecutive data to client in a while loop, I don't know when the client close，and 'flag = false' is unreachable.

https://github.com/uNetworking/uWebSockets.js/blob/master/examples/VideoStreamer.js

https://github.com/uNetworking/uWebSockets.js/blob/master/examples/Backpressure.js