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