--- title: Web Socket tags: ThingsBoard image: disqus: hackmd --- <!-- tags, title naming rule: https://thingsboard.io/docs/services/trainings/ --> # Web Socket :::info ==WebSocket 的優點== 和 HTTP 最大的差別是， WebScoket 在建立連線之後，可以實現 client 與 server 的雙向溝通機制，換言之，雙方可以即時的交換資訊，不用再等待 client 發出請求，或使用佔用資源的輪詢方式來實現。 ::: ## WebSocket API * 取得 JWT Token (token only, ~~refreshToken~~) ``` curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d '{"username":"tenant@thingsboard.org", "password":"********"}' 'https://demo.thingsboard.io/api/auth/login' ``` * ``wss://demo.thingsboard.io/api/ws/plugins/telemetry?token=$JWT_TOKEN`` or * ``ws://192.168.1.110:8080/api/ws/plugins/telemetry?token=$JWT_TOKEN`` ### h3 title 1 * ... * ... ### h3 title 2 * ... * ... ## h2 title b * ... * ... ## References * [Test WebSocket Servers](https://www.piesocket.com/websocket-tester) * [Facebook ThingsBoard Taiwan Group](https://facebook.com/groups/thingsboard)