83 lines
2.0 KiB
JavaScript
83 lines
2.0 KiB
JavaScript
import WebSocketClient from 'websocket.js';
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const randomIntUpTo = max => Math.floor(Math.random() * Math.floor(max));
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export function connectStream(path, pollingRefresh = null, callbacks = () => ({ onDisconnect() {}, onReceive() {} })) {
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return (dispatch, getState) => {
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const streamingAPIBaseURL = getState().getIn(['meta', 'streaming_api_base_url']);
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const accessToken = getState().getIn(['meta', 'access_token']);
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const { onDisconnect, onReceive } = callbacks(dispatch, getState);
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let polling = null;
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const setupPolling = () => {
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pollingRefresh(dispatch, () => {
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polling = setTimeout(() => setupPolling(), 20000 + randomIntUpTo(20000));
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});
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};
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const clearPolling = () => {
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if (polling) {
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clearTimeout(polling);
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polling = null;
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}
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};
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const subscription = getStream(streamingAPIBaseURL, accessToken, path, {
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connected () {
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if (pollingRefresh) {
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clearPolling();
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}
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},
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disconnected () {
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if (pollingRefresh) {
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polling = setTimeout(() => setupPolling(), randomIntUpTo(40000));
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}
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onDisconnect();
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},
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received (data) {
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onReceive(data);
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},
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reconnected () {
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if (pollingRefresh) {
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clearPolling();
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pollingRefresh(dispatch);
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}
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},
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});
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const disconnect = () => {
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if (subscription) {
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subscription.close();
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}
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clearPolling();
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};
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return disconnect;
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};
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}
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export default function getStream(streamingAPIBaseURL, accessToken, stream, { connected, received, disconnected, reconnected }) {
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const params = [ `stream=${stream}` ];
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if (accessToken !== null) {
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params.push(`access_token=${accessToken}`);
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}
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const ws = new WebSocketClient(`${streamingAPIBaseURL}/api/v1/streaming/?${params.join('&')}`);
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ws.onopen = connected;
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ws.onmessage = e => received(JSON.parse(e.data));
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ws.onclose = disconnected;
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ws.onreconnect = reconnected;
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return ws;
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};
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