patch: implement @lunamidori hotfix for LocalAI streaming chunk overflows (#433)

* patch: implement @lunamidori hotfix for LocalAI streaming chunk overflows
resolves #416

* change log to error log

* log trace

* lint

server/utils/chats/stream.js

@@ -253,7 +253,16 @@ function handleStreamResponses(response, stream, responseProps) {
         } catch {}
 
         if (!validJSON) {
-          chunk += message;
+          // It can be possible that the chunk decoding is running away
+          // and the message chunk fails to append due to string length.
+          // In this case abort the chunk and reset so we can continue.
+          // ref: https://github.com/Mintplex-Labs/anything-llm/issues/416
+          try {
+            chunk += message;
+          } catch (e) {
+            console.error(`Chunk appending error`, e);
+            chunk = "";
+          }
           continue;
         } else {
           chunk = "";