107 lines
3.2 KiB
JavaScript
107 lines
3.2 KiB
JavaScript
const cacheManager = require('cache-manager');
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const mangodbStore = require('cache-manager-mongodb');
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const { isStaticUrl } = require('../moch/static')
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const GLOBAL_KEY_PREFIX = 'torrentio-addon';
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const STREAM_KEY_PREFIX = `${GLOBAL_KEY_PREFIX}|stream`;
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const AVAILABILITY_KEY_PREFIX = `${GLOBAL_KEY_PREFIX}|availability`;
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const RESOLVED_URL_KEY_PREFIX = `${GLOBAL_KEY_PREFIX}|resolved`;
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const STREAM_TTL = process.env.STREAM_TTL || 4 * 60 * 60; // 4 hours
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const STREAM_EMPTY_TTL = process.env.STREAM_EMPTY_TTL || 60; // 1 minute
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const AVAILABILITY_TTL = 8 * 60 * 60; // 8 hours
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const AVAILABILITY_EMPTY_TTL = 30 * 60; // 30 minutes
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const MESSAGE_VIDEO_URL_TTL = 60; // 1 minutes
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// When the streams are empty we want to cache it for less time in case of timeouts or failures
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const MONGO_URI = process.env.MONGODB_URI;
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const NO_CACHE = process.env.NO_CACHE || false;
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const memoryCache = initiateMemoryCache();
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const remoteCache = initiateRemoteCache();
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function initiateRemoteCache() {
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if (NO_CACHE) {
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return null;
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} else if (MONGO_URI) {
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return cacheManager.caching({
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store: mangodbStore,
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uri: MONGO_URI,
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options: {
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collection: 'torrentio_addon_collection',
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socketTimeoutMS: 120000,
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useNewUrlParser: true,
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useUnifiedTopology: false,
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ttl: STREAM_EMPTY_TTL
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},
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ttl: STREAM_EMPTY_TTL,
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ignoreCacheErrors: true
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});
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} else {
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return cacheManager.caching({
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store: 'memory',
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ttl: STREAM_EMPTY_TTL
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});
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}
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}
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function initiateMemoryCache() {
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return cacheManager.caching({
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store: 'memory',
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ttl: MESSAGE_VIDEO_URL_TTL,
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max: Infinity // infinite LRU cache size
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});
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}
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function cacheWrap(cache, key, method, options) {
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if (NO_CACHE || !cache) {
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return method();
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}
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return cache.wrap(key, method, options);
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}
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function cacheWrapStream(id, method) {
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return cacheWrap(remoteCache, `${STREAM_KEY_PREFIX}:${id}`, method, {
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ttl: (streams) => streams.length ? STREAM_TTL : STREAM_EMPTY_TTL
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});
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}
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function cacheWrapResolvedUrl(id, method) {
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return cacheWrap(memoryCache, `${RESOLVED_URL_KEY_PREFIX}:${id}`, method, {
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ttl: (url) => isStaticUrl(url) ? MESSAGE_VIDEO_URL_TTL : STREAM_TTL
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});
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}
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function cacheAvailabilityResults(results) {
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Object.keys(results)
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.forEach(infoHash => {
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const key = `${AVAILABILITY_KEY_PREFIX}:${infoHash}`;
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const value = results[infoHash];
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const ttl = value?.length ? AVAILABILITY_TTL : AVAILABILITY_EMPTY_TTL;
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memoryCache.set(key, value, { ttl })
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});
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return results;
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}
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function getCachedAvailabilityResults(infoHashes) {
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const keys = infoHashes.map(infoHash => `${AVAILABILITY_KEY_PREFIX}:${infoHash}`)
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return new Promise(resolve => {
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memoryCache.mget(...keys, (error, result) => {
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if (error) {
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console.log('Failed retrieve availability cache', error)
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return resolve({});
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}
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const availabilityResults = {};
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infoHashes.forEach((infoHash, index) => {
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if (result[index]) {
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availabilityResults[infoHash] = result[index];
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}
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});
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resolve(availabilityResults);
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})
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});
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}
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module.exports = { cacheWrapStream, cacheWrapResolvedUrl, cacheAvailabilityResults, getCachedAvailabilityResults };
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