Did a lot. Tested SSE & started on socket.io, should prob kill s.io replace w/ ws

api/helpers/SSE.js

@@ -0,0 +1,82 @@
+class SSE {
+  constructor(response, clientId, base64encode=false) {
+    if (!(this instanceof SSE)) {
+      return new SSE(response, clientId, base64encode);
+    }
+    this.response = response;
+    this.clientId = clientId;
+    this.base64encodeData = base64encode;
+    this.delay = 1000;
+    this.lastMessageId;
+
+    this.manualShutdown;
+
+    this.setupEventStream();
+    this.welcomeClient();
+  }
+
+  welcomeClient() {
+    console.log("welcome client")
+    this.response.write('id\n\n'); // reset the id counter
+  }
+
+  setupEventStream() {
+    this.response.writeHead(200, {
+      'Content-Type': 'text/event-stream',
+      'Cache-Control': 'no-cache',
+      'Connection': 'keep-alive'
+    });
+  }
+
+  setupMessageData(message) {
+    if (typeof message === 'string') {
+      message = { message: message }
+    }
+
+    message.type = message.type != null ? message.type : 'message';
+
+    message = JSON.stringify(message, null, 1);
+    if (this.base64encodeData === true) {
+      message = btoa(message);
+    }
+
+    return message;
+  }
+
+  writeMessage(message, id=null) {
+    console.log(`Sending message to client: ${this.clientId}, id: ${id} ${this.id}`);
+
+    message = this.setupMessageData(message);
+    this.id = id || this.id
+
+    this.response.write(`id: ${id}\n`);
+    this.response.write(`retry: 10000\n`)
+    this.response.write(`data: ${message}\n\n`)
+  }
+
+  writeClose() {
+    const message = {
+      message: 'Server asking client to close connection',
+      type: 'end'
+    }
+
+    const data = this.setupMessageData(message);
+    this.response.write(`data: ${data}\n\n`);
+  }
+
+  end() {
+    console.log("END CALLED, asking client to close")
+    this.writeClose();
+
+    // give it a safe buffer of time before we shut it down manually
+    const res = this.response;
+    this.manualShutdown = setTimeout(() => {
+      console.log("forcing server side")
+      res.end()
+    }, 2000)
+    this.response.end();
+  }
+}
+
+
+module.exports = SSE;