[Glitch] Add support for managing multiple stream subscriptions in a single connection
Ported ef057584fd to glitch-soc
Signed-off-by: Thibaut Girka <thib@sitedethib.com>
pull/1398/head
Eugen Rochko
Thibaut Girka
parent
78fa15d08f
commit
8ae52dc792
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@ -1,3 +1,5 @@
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// @ts-check
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import { connectStream } from 'flavours/glitch/util/stream';
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import {
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updateTimeline,
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@ -19,24 +21,59 @@ import { getLocale } from 'mastodon/locales';
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const { messages } = getLocale();
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export function connectTimelineStream (timelineId, path, pollingRefresh = null, accept = null) {
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/**
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* @param {number} max
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* @return {number}
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*/
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const randomUpTo = max =>
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Math.floor(Math.random() * Math.floor(max));
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return connectStream (path, pollingRefresh, (dispatch, getState) => {
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/**
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* @param {string} timelineId
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* @param {string} channelName
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* @param {Object.<string, string>} params
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* @param {Object} options
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* @param {function(Function, Function): void} [options.fallback]
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* @param {function(object): boolean} [options.accept]
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* @return {function(): void}
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*/
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export const connectTimelineStream = (timelineId, channelName, params = {}, options = {}) =>
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connectStream(channelName, params, (dispatch, getState) => {
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const locale = getState().getIn(['meta', 'locale']);
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let pollingId;
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/**
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* @param {function(Function, Function): void} fallback
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*/
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const useFallback = fallback => {
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fallback(dispatch, () => {
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pollingId = setTimeout(() => useFallback(fallback), 20000 + randomUpTo(20000));
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});
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};
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return {
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onConnect() {
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dispatch(connectTimeline(timelineId));
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if (pollingId) {
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clearTimeout(pollingId);
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pollingId = null;
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}
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},
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onDisconnect() {
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dispatch(disconnectTimeline(timelineId));
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if (options.fallback) {
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pollingId = setTimeout(() => useFallback(options.fallback), randomUpTo(40000));
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}
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},
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onReceive (data) {
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switch(data.event) {
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case 'update':
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dispatch(updateTimeline(timelineId, JSON.parse(data.payload), accept));
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dispatch(updateTimeline(timelineId, JSON.parse(data.payload), options.accept));
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break;
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case 'delete':
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dispatch(deleteFromTimelines(data.payload));
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@ -63,17 +100,60 @@ export function connectTimelineStream (timelineId, path, pollingRefresh = null,
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},
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};
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});
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}
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/**
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* @param {Function} dispatch
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* @param {function(): void} done
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*/
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const refreshHomeTimelineAndNotification = (dispatch, done) => {
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dispatch(expandHomeTimeline({}, () =>
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dispatch(expandNotifications({}, () =>
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dispatch(fetchAnnouncements(done))))));
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};
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export const connectUserStream = () => connectTimelineStream('home', 'user', refreshHomeTimelineAndNotification);
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export const connectCommunityStream = ({ onlyMedia } = {}) => connectTimelineStream(`community${onlyMedia ? ':media' : ''}`, `public:local${onlyMedia ? ':media' : ''}`);
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export const connectPublicStream = ({ onlyMedia, onlyRemote, allowLocalOnly } = {}) => connectTimelineStream(`public${onlyRemote ? ':remote' : (allowLocalOnly ? ':allow_local_only' : '')}${onlyMedia ? ':media' : ''}`, `public${onlyRemote ? ':remote' : (allowLocalOnly ? ':allow_local_only' : '')}${onlyMedia ? ':media' : ''}`);
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export const connectHashtagStream = (id, tag, local, accept) => connectTimelineStream(`hashtag:${id}${local ? ':local' : ''}`, `hashtag${local ? ':local' : ''}&tag=${tag}`, null, accept);
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export const connectDirectStream = () => connectTimelineStream('direct', 'direct');
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export const connectListStream = id => connectTimelineStream(`list:${id}`, `list&list=${id}`);
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/**
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* @return {function(): void}
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*/
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export const connectUserStream = () =>
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connectTimelineStream('home', 'user', {}, { fallback: refreshHomeTimelineAndNotification });
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/**
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* @param {Object} options
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* @param {boolean} [options.onlyMedia]
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* @return {function(): void}
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*/
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export const connectCommunityStream = ({ onlyMedia } = {}) =>
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connectTimelineStream(`community${onlyMedia ? ':media' : ''}`, `public:local${onlyMedia ? ':media' : ''}`);
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/**
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* @param {Object} options
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* @param {boolean} [options.onlyMedia]
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* @param {boolean} [options.onlyRemote]
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* @param {boolean} [options.allowLocalOnly]
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* @return {function(): void}
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*/
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export const connectPublicStream = ({ onlyMedia, onlyRemote, allowLocalOnly } = {}) =>
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connectTimelineStream(`public${onlyRemote ? ':remote' : (allowLocalOnly ? ':allow_local_only' : '')}${onlyMedia ? ':media' : ''}`, `public${onlyRemote ? ':remote' : (allowLocalOnly ? ':allow_local_only' : '')}${onlyMedia ? ':media' : ''}`);
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/**
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* @param {string} columnId
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* @param {string} tagName
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* @param {boolean} onlyLocal
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* @param {function(object): boolean} accept
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* @return {function(): void}
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*/
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export const connectHashtagStream = (columnId, tagName, onlyLocal, accept) =>
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connectTimelineStream(`hashtag:${columnId}${onlyLocal ? ':local' : ''}`, `hashtag${onlyLocal ? ':local' : ''}`, { tag: tagName }, { accept });
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/**
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* @return {function(): void}
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*/
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export const connectDirectStream = () =>
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connectTimelineStream('direct', 'direct');
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/**
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* @param {string} listId
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* @return {function(): void}
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*/
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export const connectListStream = listId =>
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connectTimelineStream(`list:${listId}`, 'list', { list: listId });
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@ -1,87 +1,236 @@
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// @ts-check
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import WebSocketClient from '@gamestdio/websocket';
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const randomIntUpTo = max => Math.floor(Math.random() * Math.floor(max));
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/**
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* @type {WebSocketClient | undefined}
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*/
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let sharedConnection;
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const knownEventTypes = [
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'update',
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'delete',
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'notification',
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'conversation',
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'filters_changed',
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];
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/**
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* @typedef Subscription
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* @property {string} channelName
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* @property {Object.<string, string>} params
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* @property {function(): void} onConnect
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* @property {function(StreamEvent): void} onReceive
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* @property {function(): void} onDisconnect
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*/
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export function connectStream(path, pollingRefresh = null, callbacks = () => ({ onConnect() {}, 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 { onConnect, onDisconnect, onReceive } = callbacks(dispatch, getState);
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/**
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* @typedef StreamEvent
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* @property {string} event
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* @property {object} payload
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*/
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let polling = null;
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/**
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* @type {Array.<Subscription>}
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*/
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const subscriptions = [];
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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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/**
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* @type {Object.<string, number>}
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*/
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const subscriptionCounters = {};
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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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* @param {Subscription} subscription
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*/
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const addSubscription = subscription => {
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subscriptions.push(subscription);
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};
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/**
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* @param {Subscription} subscription
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*/
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const removeSubscription = subscription => {
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const index = subscriptions.indexOf(subscription);
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if (index !== -1) {
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subscriptions.splice(index, 1);
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}
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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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* @param {Subscription} subscription
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*/
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const subscribe = ({ channelName, params, onConnect }) => {
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const key = channelNameWithInlineParams(channelName, params);
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subscriptionCounters[key] = subscriptionCounters[key] || 0;
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if (subscriptionCounters[key] === 0) {
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sharedConnection.send(JSON.stringify({ type: 'subscribe', stream: channelName, ...params }));
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}
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subscriptionCounters[key] += 1;
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onConnect();
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};
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/**
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* @param {Subscription} subscription
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*/
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const unsubscribe = ({ channelName, params, onDisconnect }) => {
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const key = channelNameWithInlineParams(channelName, params);
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subscriptionCounters[key] = subscriptionCounters[key] || 1;
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if (subscriptionCounters[key] === 1 && sharedConnection.readyState === WebSocketClient.OPEN) {
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sharedConnection.send(JSON.stringify({ type: 'unsubscribe', stream: channelName, ...params }));
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}
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subscriptionCounters[key] -= 1;
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onDisconnect();
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};
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const sharedCallbacks = {
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connected () {
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subscriptions.forEach(subscription => subscribe(subscription));
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},
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received (data) {
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const { stream } = data;
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subscriptions.filter(({ channelName, params }) => {
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const streamChannelName = stream[0];
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if (stream.length === 1) {
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return channelName === streamChannelName;
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}
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const streamIdentifier = stream[1];
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if (['hashtag', 'hashtag:local'].includes(channelName)) {
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return channelName === streamChannelName && params.tag === streamIdentifier;
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} else if (channelName === 'list') {
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return channelName === streamChannelName && params.list === streamIdentifier;
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}
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return false;
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}).forEach(subscription => {
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subscription.onReceive(data);
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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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subscriptions.forEach(({ onDisconnect }) => onDisconnect());
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},
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reconnected () {
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subscriptions.forEach(subscription => subscribe(subscription));
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},
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};
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/**
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* @param {string} channelName
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* @param {Object.<string, string>} params
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* @return {string}
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*/
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const channelNameWithInlineParams = (channelName, params) => {
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if (Object.keys(params).length === 0) {
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return channelName;
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}
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onDisconnect();
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return `${channelName}&${Object.keys(params).map(key => `${key}=${params[key]}`).join('&')}`;
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};
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/**
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* @param {string} channelName
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* @param {Object.<string, string>} params
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* @param {function(Function, Function): { onConnect: (function(): void), onReceive: (function(StreamEvent): void), onDisconnect: (function(): void) }} callbacks
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* @return {function(): void}
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*/
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export const connectStream = (channelName, params, callbacks) => (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 { onConnect, onReceive, onDisconnect } = callbacks(dispatch, getState);
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// If we cannot use a websockets connection, we must fall back
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// to using individual connections for each channel
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if (!streamingAPIBaseURL.startsWith('ws')) {
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const connection = createConnection(streamingAPIBaseURL, accessToken, channelNameWithInlineParams(channelName, params), {
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connected () {
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onConnect();
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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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onConnect();
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disconnected () {
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onDisconnect();
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},
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reconnected () {
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onConnect();
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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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return () => {
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connection.close();
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};
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}
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clearPolling();
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const subscription = {
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channelName,
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params,
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onConnect,
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onReceive,
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onDisconnect,
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};
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return disconnect;
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addSubscription(subscription);
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// If a connection is open, we can execute the subscription right now. Otherwise,
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// because we have already registered it, it will be executed on connect
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if (!sharedConnection) {
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sharedConnection = /** @type {WebSocketClient} */ (createConnection(streamingAPIBaseURL, accessToken, '', sharedCallbacks));
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} else if (sharedConnection.readyState === WebSocketClient.OPEN) {
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subscribe(subscription);
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}
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return () => {
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removeSubscription(subscription);
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unsubscribe(subscription);
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};
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}
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};
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const KNOWN_EVENT_TYPES = [
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'update',
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'delete',
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'notification',
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'conversation',
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'filters_changed',
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'encrypted_message',
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'announcement',
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'announcement.delete',
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'announcement.reaction',
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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.split('&');
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stream = params.shift();
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/**
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* @param {MessageEvent} e
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* @param {function(StreamEvent): void} received
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*/
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const handleEventSourceMessage = (e, received) => {
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received({
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event: e.type,
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payload: e.data,
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});
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};
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/**
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* @param {string} streamingAPIBaseURL
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* @param {string} accessToken
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* @param {string} channelName
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* @param {{ connected: Function, received: function(StreamEvent): void, disconnected: Function, reconnected: Function }} callbacks
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* @return {WebSocketClient | EventSource}
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*/
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const createConnection = (streamingAPIBaseURL, accessToken, channelName, { connected, received, disconnected, reconnected }) => {
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const params = channelName.split('&');
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channelName = params.shift();
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if (streamingAPIBaseURL.startsWith('ws')) {
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params.unshift(`stream=${stream}`);
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const ws = new WebSocketClient(`${streamingAPIBaseURL}/api/v1/streaming/?${params.join('&')}`, accessToken);
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ws.onopen = connected;
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@ -92,11 +241,19 @@ export default function getStream(streamingAPIBaseURL, accessToken, stream, { co
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return ws;
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}
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stream = stream.replace(/:/g, '/');
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channelName = channelName.replace(/:/g, '/');
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if (channelName.endsWith(':media')) {
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channelName = channelName.replace('/media', '');
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params.push('only_media=true');
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}
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params.push(`access_token=${accessToken}`);
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const es = new EventSource(`${streamingAPIBaseURL}/api/v1/streaming/${stream}?${params.join('&')}`);
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const es = new EventSource(`${streamingAPIBaseURL}/api/v1/streaming/${channelName}?${params.join('&')}`);
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let firstConnect = true;
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es.onopen = () => {
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if (firstConnect) {
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firstConnect = false;
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@ -105,15 +262,12 @@ export default function getStream(streamingAPIBaseURL, accessToken, stream, { co
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reconnected();
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}
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};
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for (let type of knownEventTypes) {
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es.addEventListener(type, (e) => {
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received({
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event: e.type,
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payload: e.data,
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KNOWN_EVENT_TYPES.forEach(type => {
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es.addEventListener(type, e => handleEventSourceMessage(/** @type {MessageEvent} */ (e), received));
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});
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});
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}
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es.onerror = disconnected;
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es.onerror = /** @type {function(): void} */ (disconnected);
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return es;
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};
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