From edd339e05603d187db0e7bad65462b393aa3d660 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.crater@gmail.com>
Date: Sun, 1 Mar 2026 00:02:22 +0800
Subject: [PATCH] fix(wecom): handle empty response by encrypting and returning
 a default response

---
 pkg/channels/wecom/aibot.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkg/channels/wecom/aibot.go b/pkg/channels/wecom/aibot.go
index e9eda6810..4bd8adb98 100644
--- a/pkg/channels/wecom/aibot.go
+++ b/pkg/channels/wecom/aibot.go
@@ -433,6 +433,11 @@ func (c *WeComAIBotChannel) handleMessageCallback(
 	// Process the message and get streaming response
 	response := c.processMessage(ctx, msg, timestamp, nonce)
 
+	// Check if response is empty (e.g. due to unsupported message type)
+	if response == "" {
+		response = c.encryptEmptyResponse(timestamp, nonce)
+	}
+
 	// Return encrypted JSON response
 	w.Header().Set("Content-Type", "application/json; charset=utf-8")
 	w.WriteHeader(http.StatusOK)