fix: improve error handling for remote engine

Author: sangjanai

engine/extensions/remote-engine/remote_engine.cc

@@ -29,7 +29,11 @@ size_t StreamWriteCallback(char* ptr, size_t size, size_t nmemb,
   CTL_DBG(chunk);
   Json::Value check_error;
   Json::Reader reader;
-  if (reader.parse(chunk, check_error)) {
+  context->chunks += chunk;
+  if ((context->chunks.find("error") != std::string::npos ||
+       context->chunks.find("Error") != std::string::npos) &&
+      (reader.parse(chunk, check_error) ||
+       reader.parse(context->chunks, check_error))) {
     CTL_WRN(chunk);
     CTL_INF("Request: " << context->last_request);
     Json::Value status;

engine/extensions/remote-engine/remote_engine.h

@@ -26,6 +26,7 @@ struct StreamContext {
   std::string stream_template;
   bool need_stop = true;
   std::string last_request;
+  std::string chunks;
 };
 struct CurlResponse {
   std::string body;