From 7449634290cc9b508067c0d1d843797328a0c4bc Mon Sep 17 00:00:00 2001
From: Arman Ordookhani <arman.ordookhani@vestiairecollective.com>
Date: Fri, 26 Apr 2024 15:37:18 +0200
Subject: [PATCH] Fix OpenRouter hearbeats breaking streaming

---
 src/lib/apis/streaming/index.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lib/apis/streaming/index.ts b/src/lib/apis/streaming/index.ts
index 5b89a4668..a0d12c31a 100644
--- a/src/lib/apis/streaming/index.ts
+++ b/src/lib/apis/streaming/index.ts
@@ -31,6 +31,10 @@ async function* openAIStreamToIterator(
 				console.log(line);
 				if (line === 'data: [DONE]') {
 					yield { done: true, value: '' };
+				} if (line.startsWith(':')) {
+					// Events starting with : are comments https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#event_stream_format
+					// OpenRouter sends heartbeats like ": OPENROUTER PROCESSING"
+					continue
 				} else {
 					const data = JSON.parse(line.replace(/^data: /, ''));
 					console.log(data);