Pusher WebSockets

https://pusher.com/docs/channels/using_channels/channels

asp.net

https://pusher.com/docs/channels/server_api/overview/

https://pusher.com/docs/channels/channels_libraries/libraries

https://progi.pro/pusher-t1307

https://progi.pro/pusher-t1307/11

https://habr.com/ru/post/130530/

https://habr.com/ru/company/ruvds/blog/342346/

https://overcoder.net/q/2337785/%D0%B7%D0%B0%D1%87%D0%B5%D0%BC-%D0%BD%D0%B0%D0%BC-%D0%BD%D1%83%D0%B6%D0%BD%D1%8B-%D1%82%D0%B0%D0%BA%D0%B8%D0%B5-%D0%BF%D1%80%D0%BE%D0%B4%D1%83%D0%BA%D1%82%D1%8B-%D0%BA%D0%B0%D0%BA-pusher-%D0%B8-socketio-%D0%B4%D0%BB%D1%8F-%D1%83%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F

https://coderoad.ru/44611103/%D0%97%D0%B0%D1%87%D0%B5%D0%BC-%D0%BD%D0%B0%D0%BC-%D0%BD%D1%83%D0%B6%D0%BD%D1%8B-%D1%82%D0%B0%D0%BA%D0%B8%D0%B5-%D0%BF%D1%80%D0%BE%D0%B4%D1%83%D0%BA%D1%82%D1%8B-%D0%BA%D0%B0%D0%BA-Pusher-%D0%B8-Socket-io-%D1%87%D1%82%D0%BE%D0%B1%D1%8B-%D1%83%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%B8%D1%82%D1%8C

https://laravel.ru/posts/655

https://laravel.su/docs/5.4/broadcasting