Merge pull request #112 from deepgram/add-close-event-reason

added reason to close event

Author: briancbarrow

src/transcription/liveTranscription.ts

@@ -36,6 +36,13 @@ export class LiveTranscription extends EventEmitter {
     };
 
     this._socket.onclose = (event: WebSocket.CloseEvent) => {
+      // changing the event.target to any to access the private _req property that isn't available on the WebSocket.CloseEvent type
+      const newTarget: any = event.target;
+      if (newTarget["_req"]) {
+        const dgErrorIndex =
+          newTarget["_req"].res.rawHeaders.indexOf("dg-error");
+        event.reason = newTarget["_req"].res.rawHeaders[dgErrorIndex + 1];
+      }
       this.emit(LiveTranscriptionEvents.Close, event);
     };