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Websockets #350

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Websockets #350

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ed85e53
Change url after creation
lgln-kmi Sep 25, 2024
3a18346
Automatic reconnect
lgln-kmi Sep 25, 2024
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34 changes: 31 additions & 3 deletions src/lib/components/WebSocket.react.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,10 @@ export default class DashWebSocket extends Component {
// Create a new client.
let {url} = this.props;
const {protocols} = this.props;
url = url? url : "ws://" + location.host + location.pathname + "ws";
// No url - client will be created, when url will be updated
if (!url) {
return (null)
}
this.client = new WebSocket(url, protocols);
// Listen for events.
this.client.onopen = (e) => {
Expand Down Expand Up @@ -62,15 +65,40 @@ export default class DashWebSocket extends Component {
this._init_client()
}

componentDidUpdate(prevProps) {
async componentDidUpdate(prevProps) {
const {url} = this.props;
// Change url.
if (url && url != prevProps.url) {
if (this.props.state.readyState === WebSocket.OPEN) {
this.client.close()
}
this._init_client()
}
const {send} = this.props;
// Send messages.
if (send && send !== prevProps.send) {
if (this.props.state.readyState === WebSocket.CLOSED) {
console.log('Websocket is closed. Trying to reconnect')
this._init_client()
}
if (this.props.state.readyState !== WebSocket.OPEN) {
console.log('Websocket is connecting. Waiting one second...')
await new Promise(r => setTimeout(r, 1000))
}
if (this.props.state.readyState === WebSocket.CONNECTING) {
console.log('Websocket is still connecting. Waiting five seconds...')
await new Promise(r => setTimeout(r, 5000))
}
if (this.props.state.readyState !== WebSocket.OPEN) {
console.log('Websocket connection failed. Abort.')
return
}

console.log('Socket state: ' + this.props.state.readyState )
if (this.props.state.readyState === WebSocket.OPEN) {
this.client.send(send)
}
}
// TODO: Maybe add support for changing the url?
}

componentWillUnmount() {
Expand Down