Bugfix/ui streaming when model streaming is off (#4424)

fix ui streaming when model streaming is off

Author: HenryHengZJ

packages/components/nodes/agentflow/Agent/Agent.ts

@@ -903,7 +903,11 @@ class Agent_Agentflow implements INode {
                 }
             } else if (!humanInput && !isStreamable && isLastNode && sseStreamer) {
                 // Stream whole response back to UI if not streaming and no tool calls
-                sseStreamer.streamTokenEvent(chatId, JSON.stringify(response, null, 2))
+                let responseContent = JSON.stringify(response, null, 2)
+                if (typeof response.content === 'string') {
+                    responseContent = response.content
+                }
+                sseStreamer.streamTokenEvent(chatId, responseContent)
             }
 
             // Calculate execution time
@@ -1473,7 +1477,11 @@ class Agent_Agentflow implements INode {
 
             // Stream non-streaming response if this is the last node
             if (isLastNode && sseStreamer) {
-                sseStreamer.streamTokenEvent(chatId, JSON.stringify(newResponse, null, 2))
+                let responseContent = JSON.stringify(newResponse, null, 2)
+                if (typeof newResponse.content === 'string') {
+                    responseContent = newResponse.content
+                }
+                sseStreamer.streamTokenEvent(chatId, responseContent)
             }
         }
 
@@ -1715,7 +1723,11 @@ class Agent_Agentflow implements INode {
 
             // Stream non-streaming response if this is the last node
             if (isLastNode && sseStreamer) {
-                sseStreamer.streamTokenEvent(chatId, JSON.stringify(newResponse, null, 2))
+                let responseContent = JSON.stringify(newResponse, null, 2)
+                if (typeof newResponse.content === 'string') {
+                    responseContent = newResponse.content
+                }
+                sseStreamer.streamTokenEvent(chatId, responseContent)
             }
         }
 

packages/components/nodes/agentflow/LLM/LLM.ts

@@ -460,7 +460,11 @@ class LLM_Agentflow implements INode {
                 // Stream whole response back to UI if this is the last node
                 if (isLastNode && options.sseStreamer) {
                     const sseStreamer: IServerSideEventStreamer = options.sseStreamer as IServerSideEventStreamer
-                    sseStreamer.streamTokenEvent(chatId, JSON.stringify(response, null, 2))
+                    let responseContent = JSON.stringify(response, null, 2)
+                    if (typeof response.content === 'string') {
+                        responseContent = response.content
+                    }
+                    sseStreamer.streamTokenEvent(chatId, responseContent)
                 }
             }