Merge pull request #41 from Legonzaur/main

Node Clusters and additional header for request compression

src/client/client.ts

@@ -139,7 +139,10 @@ router.get(
       ',' +
       Math.abs(new Date().getTime() - timeStart.getTime()) / 1000 + ',' + req.originalUrl
     )
-    res.status(200).send(data)
+    const dataString = JSON.stringify(data)
+    const buffer = Buffer.from(dataString)
+    const size = buffer.length
+    res.status(200).setHeader('X-File-Size', size).setHeader('Content-Type', 'application/json').send(buffer)
   }
 )
 

src/clientMain.ts

@@ -1,4 +1,6 @@
 import * as dotenv from 'dotenv'
+import cluster from 'cluster'
+import os from 'os'
 dotenv.config()
 import express from 'express'
 import cors from 'cors'
@@ -7,20 +9,37 @@ import { dbReady } from './db/db'
 import processAll from './process/process'
 import listenKills from './process/onKill'
 
-const app = express()
+const cCPUs = os.cpus().length;
+
 const port = 3000
 
-app.use(express.json())
+if (cluster.isPrimary) {
+  // Create a worker for each CPU
+  for (let i = 0; i < cCPUs; i++) {
+    cluster.fork();
+  }
+  cluster.on('online', function (worker) {
+    console.log('Worker ' + worker.process.pid + ' is online.');
+  });
+  cluster.on('exit', function (worker, code, signal) {
+    console.log('worker ' + worker.process.pid + ' died.');
+  });
+}
 
-app.use(cors())
-app.get('/', (req, res) => {
-  res.send('Tone client API online')
-})
 
-app.use('/', client)
 
 export default
   new Promise(async (resolve, reject) => {
+    if (!cluster.isPrimary) {
+      const app = express()
+      app.use(express.json())
+      app.use(cors({ exposedHeaders: ['X-File-Size', 'Content-Encoding'] }))
+      app.get('/', (req, res) => {
+        res.send('Tone client API online')
+      })
+
+      app.use('/', client)
+
       await dbReady()
       await processAll()
       await listenKills()
@@ -28,4 +47,5 @@ export default
         console.log(`Tone client api listening on port ${port}`)
         resolve(listenServer)
       })
+    }
   })