STEINNI
243 lines
10 KiB
JavaScript
243 lines
10 KiB
JavaScript
import redis from 'redis'
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export class RedisConnexion {
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constructor(options) {
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this.config = options.config;
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this.debug = options.debug;
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this.redisId = options.redisId;
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this.redisConfig = this.config
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this.subscriptions = {}; // Externally fed
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this.wssConnections = {}; // Externally fed
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this.redisClient = redis.createClient({
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socket: {
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tls: this.redisConfig.tls,
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host: this.redisConfig.host,
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port: this.redisConfig.port
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}
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});
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this.redisSubscriber = null;
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this.redisClient.on('error', (err) => {
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console.error('Redis error: ', err);
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});
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis started...`)
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}
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getSubscribedUuids(chan){
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let uuids = []
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let re
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for(let subChan in this.subscriptions){
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if(subChan==chan){
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uuids = [...uuids, ...this.subscriptions[subChan]]
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} else {
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re = new RegExp('^'+subChan.replace(/\*/g,'(.+)')+'$','g')
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if(chan.match(re)!=null){
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uuids = [...uuids, ...this.subscriptions[subChan]]
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}
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}
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}
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return(uuids)
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}
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async redisLogin(){
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if(this.debug) console.log(`Connecting to Redis (${this.redisConfig.host}:${this.redisConfig.port}, tls:${this.redisConfig.tls?'yes':'no'})...`);
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await this.redisClient.connect();
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if(this.debug) console.log(`Connected to Redis ${this.redisConfig.redisId}`);
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if(this.redisConfig.user) {
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await this.redisClient.sendCommand(['AUTH', this.redisConfig.user, this.redisConfig.pass]);
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if(this.debug) console.log(`Logged into Redis ${this.redisConfig.redisId}`);
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} else {
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if(this.debug) console.log(`Connected (anon) to Redis ${this.redisConfig.redisId}`);
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}
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if(this.debug) {
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var redisTime = await this.redisClient.time();
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console.log(`[${this.redisConfig.redisId}] Redis ${this.redisConfig.redisId} time:`, redisTime);
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}
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}
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async redisChansStart(){
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this.redisSubscriber = this.redisClient.duplicate();
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await this.redisSubscriber.connect();
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if(this.redisConfig.user) {
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await this.redisSubscriber.sendCommand(['AUTH', this.redisConfig.user, this.redisConfig.pass]);
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}
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const allChans = this.redisConfig.basePrefix + this.redisConfig.chansNamespace+'*'
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this.redisSubscriber.pSubscribe(allChans, this.redisReceive.bind(this));
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if(this.debug) console.log(`[${this.redisConfig.redisId}] PSubscription OK `, allChans);
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}
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async redisSubscribe(chanName, callBack){
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if(!chanName.startsWith(this.redisConfig.basePrefix)) chanName = this.redisConfig.basePrefix + chanName
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if(!chanName.startsWith(this.redisConfig.basePrefix+this.chansNamespace)) {
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console.warn(`[${this.redisConfig.redisId}] redisSubscribe : forbidden channel range on this redis !`)
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return
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}
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await this.redisSubscriber.subscribe(chanName, callBack);
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}
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async redisPublish(chanName, msg){
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if(typeof (msg) != 'string') msg = JSON.stringify(msg);
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if(!chanName.startsWith(this.redisConfig.basePrefix)) chanName = this.redisConfig.basePrefix + chanName
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if(!chanName.startsWith(this.redisConfig.basePrefix+this.chansNamespace)) {
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console.warn(`[${this.redisConfig.redisId}] redisPublish : forbidden channel range on this redis !`)
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return
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}
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await this.redisClient.publish(chanName, msg);
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}
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async redisSet(k, v, exp = 0, customPrefix=null){
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if(typeof(v) != 'string') v = JSON.stringify(v);
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if(customPrefix!==null) k = customPrefix + k
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else if(!k.startsWith(this.redisConfig.basePrefix)) k = this.redisConfig.basePrefix + k
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis SET `, k);
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try { await this.redisClient.set(k, v) }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis set: `, k, v) }
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if(exp > 0) {
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try { await this.redisClient.expire(k, exp) }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis expire: `, k, exp) }
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}
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}
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async redisGet(k, customPrefix=null){
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if(customPrefix!==null) k = customPrefix + k
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else if(!k.startsWith(this.redisConfig.basePrefix)) k = this.redisConfig.basePrefix + k
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis GET`, k)
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let v=null
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try { v = await this.redisClient.get(k) }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis get: `, k) }
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return(v);
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}
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async redisDel(k, customPrefix=null){
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if(customPrefix!==null) k = customPrefix + k
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else if(!k.startsWith(this.redisConfig.basePrefix)) k = this.redisConfig.basePrefix + k
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Deleting`, k);
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await this.redisClient.del(k);
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}
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async redisGetTtl(k, customPrefix=null){
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if(customPrefix!==null) k = customPrefix + k
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else if(!k.startsWith(this.redisConfig.basePrefix)) k = this.redisConfig.basePrefix + k
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis Get TTL `, k)
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let v=null
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try { v = await this.redisClient.ttl(k) }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis ttl: `, k) }
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return(v);
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}
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async redisSetTtl(k, ttl, customPrefix=null){
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if(customPrefix!==null) k = customPrefix + k
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else if(!k.startsWith(this.redisConfig.basePrefix)) k = this.redisConfig.basePrefix + k
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis Set TTL`, k);
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try { await this.redisClient.expire(k, ttl) }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis expire: `, k, ttl) }
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}
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async redisXadd(streamName, kvObj, max = ''){
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if(!streamName.startsWith(this.redisConfig.basePrefix)) streamName = this.redisConfig.basePrefix + streamName
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis XADD `, streamName, kvObj);
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let arr = ['XADD', streamName]
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if(max != '') arr = [...arr, ...['MAXLEN', '~', (1*max).toString()]]
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arr.push('*')
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let payload = '""'
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try{ payload = JSON.stringify(kvObj) }
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catch(e) { console.warn(`[${this.redisConfig.redisId}] cannot historize bad json: `,kvObj) }
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arr.push('streamData')
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arr.push(payload)
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let sid = null
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try { sid = await this.redisClient.sendCommand(arr); }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis command: `, arr, err) }
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return(sid);
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}
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async redisXrange(streamName, start = '-', end = '+', withPayload = true){
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if(!streamName.startsWith(this.redisConfig.basePrefix)) streamName = this.redisConfig.basePrefix + streamName
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if(this.debug) console.log(`[${this.redisConfig.redisId}]Redis XRANGE `, streamName);
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if(typeof(start)!='string') start = start.toString()
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if(typeof(end)!='string') end = end.toString()
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let arr = ['XRANGE', streamName, start, end];
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let res = []
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try { res = await this.redisClient.sendCommand(arr) }
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis command: `, arr, err.msg) }
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if(withPayload){
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let o = {};
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for (let row of res) { // We'll take only the first content of the stream (the value of the key 'streamdata')
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let payload = ''
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try{ payload = JSON.parse(row[1][1]) }
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catch(e) { console.warn(`[${this.redisConfig.redisId}] cannot unhistorize bad json: `,row[1][1]) }
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o[row[0]] = payload
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}
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return(o);
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} else {
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return(res.map(row => row[0]))
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}
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}
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isHistorizedChan(chan){
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if(!chan.startsWith(this.redisConfig.basePrefix)) chan = this.redisConfig.basePrefix + chan
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var matches = this.redisConfig.historizeChannels.filter((e) => {
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if(!e.startsWith(this.redisConfig.basePrefix)) e = this.redisConfig.basePrefix + e
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if(e.indexOf('*') > -1) {
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let r = new RegExp('^'+e.replace(/\*/g,'(.+)')+'$','g')
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return(chan.match(r) != null);
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} else return(chan == e);
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});
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return(matches.length > 0);
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}
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async getProcessInfo(){
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Redis INFO`);
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try {
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const rawInfo = await this.redisClient.INFO()
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let arr = rawInfo.replace(/\r/g,'').split('\n')
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arr = arr.filter(item => (item.trim()!='') && (!item.trim().startsWith('#')))
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let infoObject = arr.reduce((acc, val) => { kv = val.split(':',2); if(kv.length>0){ acc[kv[0]] = kv[1] } return(acc) }, {})
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}
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catch(err) { console.error(`[${this.redisConfig.redisId}] Redis crash doing Redis INFO: `) }
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return(infoObject)
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}
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async redisReceive(msg, chan){
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if(this.debug) console.log(`[${this.redisConfig.redisId}] From Redis chan:`, chan, msg);
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try {
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msg = JSON.parse(msg);
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} catch {
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console.warn(`[${this.redisConfig.redisId}] Ignoring non-json on channel ${chan} : ${msg}`);
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return;
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}
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if(this.debug) console.log(`[${this.redisConfig.redisId}] will now fanout...`, chan, msg);
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const uuids = this.getSubscribedUuids(chan)
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if(uuids.length>0) { // Anyone interested at all about this chan ?
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Will broadcast to ${uuids.length} web clients`);
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let shortChan = chan.startsWith(this.redisConfig.basePrefix) ? chan.substr(this.redisConfig.basePrefix.length) : chan
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let payload ={
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'event': 'REDISMSG',
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'payload': {
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'msg': msg,
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'chan': shortChan,
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}
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}
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for(var uuid of uuids) {
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if(uuid in this.wssConnections) {
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if(this.debug) console.log(`[${this.redisConfig.redisId}] Sending to `, uuid, payload);
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this.wssConnections[uuid].send(JSON.stringify(payload));
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}
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}
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}
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}
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}
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// redis-cli -h redis.backend.eismea.eu --tls --user default
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