Refactor Redis into middleware

api/app.js

@@ -7,11 +7,10 @@ import compress from 'koa-compress';
 import bodyparser from 'koa-bodyparser';
 import cors from 'kcors';
 import co from 'co';
-import redis from 'redis-url';
-import coRedis from 'co-redis';
 import raven from 'raven';
 import auth from './lib/auth';
 import mongo from '../lib/mongo';
+import redis from '../lib/redis';
 import * as user from './routes/user';
 import * as file from './routes/file';
 import debugname from 'debug';
@@ -25,7 +24,13 @@ if (process.env.SENTRY_DSN) {
 
 const app = websockify(koa());
 
-const redisUrl = process.env.REDIS_URL || process.env.REDISTOGO_URL || 'redis://localhost:6379';
+app.use(function* (next){
+  this.set('Server', 'Nintendo 64');
+  if(this.req.headers['x-forwarded-proto'] === 'http'){
+    return this.redirect('https://' + this.req.headers.host + this.req.url);
+  }
+  yield next;
+});
 
 let statsdOpts = {prefix: 'hostr-api', host: process.env.STATSD_HOST || 'localhost'};
 let statsd = new StatsD(statsdOpts);
@@ -42,34 +47,10 @@ app.use(cors({
   credentials: true
 }));
 
-app.use(function* (next){
-  this.set('Server', 'Nintendo 64');
-  if(this.req.headers['x-forwarded-proto'] === 'http'){
-    return this.redirect('https://' + this.req.headers.host + this.req.url);
-  }
-  yield next;
-});
-
-const redisConn = redis.connect(redisUrl);
-let coRedisConn = {};
-
-co(function*() {
-  coRedisConn = coRedis(redisConn);
-  coRedisConn.on('error', function (err) {
-    debug('Redis error ' + err);
-  });
-}).catch(function(err) {
-  console.error(err);
-});
-
 app.use(mongo());
-
-function* setupConnections(next){
-  this.redis = coRedisConn;
-  yield next;
-}
-app.ws.use(setupConnections);
-app.use(setupConnections);
+app.use(redis());
+app.ws.use(mongo());
+app.ws.use(redis());
 
 app.use(route.get('/', function* (){
   this.status = 200;

app.js

@@ -2,8 +2,7 @@ import koa from 'koa';
 import mount from 'koa-mount';
 import route from 'koa-route';
 import websockify from 'koa-websocket';
-import redis from 'redis-url';
-import coRedis from 'co-redis';
+import redis from './lib/redis';
 import co from 'co';
 import api from './api/app';
 import { events as fileEvents } from './api/routes/file';
@@ -20,22 +19,7 @@ const app = websockify(koa());
 
 app.keys = [process.env.KEYS || 'INSECURE'];
 
-const redisUrl = process.env.REDIS_URL || process.env.REDISTOGO_URL || 'redis://localhost:6379';
-
-let coRedisConn = {};
-
-co(function*() {
-  coRedisConn = coRedis(redis.connect(redisUrl));
-  coRedisConn.on('error', function (err) {
-    debug('Redis error ' + err);
-  });
-}).catch(function(err) {
-  console.error(err);
-});
-app.ws.use(function*(next) {
-  this.redis = coRedisConn;
-  yield next;
-});
+app.ws.use(redis());
 
 app.ws.use(route.all('/api/user', userEvents));
 app.ws.use(route.all('/api/file/:id', fileEvents));

lib/redis.js

@@ -0,0 +1,29 @@
+import redis from 'redis-url';
+import coRedis from 'co-redis';
+import debugname from 'debug';
+const debug = debugname('hostr:redis');
+
+const redisUrl = process.env.REDIS_URL || process.env.REDISTOGO_URL || 'redis://localhost:6379';
+
+let connection = new Promise((resolve, reject) => {
+  debug('Connecting to Redis');
+  const client = redis.connect(redisUrl);
+  const wrapped = coRedis(client);
+  wrapped.client = client;
+  wrapped.on('error', (err) => {
+    debug('Client error: ' + err);
+  });
+  wrapped.on('ready', () => {
+    debug('Successfully connected to Redis');
+    resolve(wrapped);
+  });
+}).catch((err) => {
+  debug('Promise error: ' + err);
+});
+
+export default function () {
+  return function* redisMiddleware(next) {
+    this.redis = yield connection;
+    yield next;
+  }
+}

web/app.js

@@ -12,13 +12,12 @@ import bodyparser from 'koa-bodyparser';
 import session from 'koa-generic-session';
 import staticHandler from 'koa-file-server';
 import co from 'co';
-import redis from 'redis-url';
-import coRedis from 'co-redis';
 import raven from 'raven';
 import StatsD from 'statsy';
 // waiting for PR to be merged, can remove swig dependency when done
 import errors from '../lib/koa-error';
 import mongo from '../lib/mongo';
+import redis from '../lib/redis';
 import * as index from './routes/index';
 import * as file from './routes/file';
 import * as pro from './routes/pro';
@@ -63,19 +62,8 @@ app.use(function*(next){
   yield next;
 });
 
-const redisConn = redis.connect(redisUrl);
-let coRedisConn = {};
-
-co(function*() {
-  coRedisConn = coRedis(redisConn);
-  coRedisConn.on('error', function (err) {
-    debug('Redis error ' + err);
-  });
-}).catch(function(err) {
-  debug(err);
-});
-
 app.use(mongo());
+app.use(redis());
 app.use(compress());
 app.use(bodyparser());
 app.use(favicon(path.join(__dirname, 'public/images/favicon.png')));
@@ -85,23 +73,11 @@ app.use(views('views', {
   default: 'ejs'
 }));
 
-app.use(function* setupConnections(next){
-  this.redis = coRedisConn;
-  yield next;
-});
-
 app.keys = [process.env.KEYS || 'INSECURE'];
 app.use(session({
-  store: redisStore({client: redisConn})
+  store: redisStore({client: redis().client})
 }));
 
-app.use(function* objectIdSession(next) {
-  if (this.session.user) {
-    this.session.user.id = objectId(this.session.user.id);
-  }
-  yield next;
-});
-
 app.use(route.get('/', index.main));
 app.use(route.get('/account', index.main));
 app.use(route.get('/billing', index.main));