Merge branch 'dev' of https://github.com/Mai-with-u/MaiBot into dev

src/chat/message_receive/uni_message_sender.py

@@ -182,11 +182,60 @@ async def _send_message(message: MessageSending, show_log=True) -> bool:
                     logger.info(f"已将消息  '{message_preview}'  发往 WebUI 聊天室")
             return True
 
-        # 直接调用API发送消息
-        await get_global_api().send_message(message)
-        if show_log:
-            logger.info(f"已将消息  '{message_preview}'  发往平台'{message.message_info.platform}'")
-        return True
+        # 尝试通过Legacy API发送消息，如果失败尝试API Server Fallback
+        try:
+            send_result = await get_global_api().send_message(message)
+            if not send_result:
+                raise Exception("Legacy API send_message returned False (Target platform not found or connection lost)")
+            
+            if show_log:
+                logger.info(f"已将消息  '{message_preview}'  发往平台'{message.message_info.platform}'")
+            return True
+        except Exception as legacy_error:
+            # Fallback: 尝试使用额外的 API Server 发送
+            global_api = get_global_api()
+            extra_server = getattr(global_api, "extra_server", None)
+            
+            if extra_server and extra_server.is_running():
+                platform = message.message_info.platform
+                
+                # Fallback: 使用极其简单的 Platform -> API Key 映射
+                # 只有收到过该平台的消息，我们才知道该平台的 API Key，才能回传消息
+                platform_map = getattr(global_api, "platform_map", {})
+                target_api_key = platform_map.get(platform)
+                
+                if target_api_key:
+                    logger.warning(f"Legacy API发送失败: {legacy_error}。使用缓存API Key通过API Server发送...")
+                    try:
+                        # 构造 APIMessageBase
+                        from maim_message.message import APIMessageBase, MessageDim
+                        
+                        msg_dim = MessageDim(api_key=target_api_key, platform=platform)
+                        
+                        api_message = APIMessageBase(
+                            message_info=message.message_info,
+                            message_segment=message.message_segment,
+                            message_dim=msg_dim
+                        )
+                        
+                        # 直接调用 Server 的 send_message 接口，它会自动处理路由
+                        results = await extra_server.send_message(api_message)
+                        
+                        # 检查是否有任何连接发送成功
+                        if any(results.values()):
+                            if show_log:
+                                logger.info(f"已通过API Server Fallback将消息 '{message_preview}' 发往平台'{platform}' (key: {target_api_key})")
+                            return True
+                        else:
+                            logger.error(f"API Server Fallback发送失败: 目标用户(Key={target_api_key})无活跃连接")
+                            
+                    except Exception as fallback_error:
+                        logger.error(f"API Server Fallback发送出错: {fallback_error}")
+                else:
+                    logger.warning(f"Legacy API发送失败且无可用API Server缓存 (未收到过来自 '{platform}' 的消息，无法获取API Key)")
+            
+            # 如果没有fallback或fallback失败，抛出原始异常
+            raise legacy_error
 
     except Exception as e:
         logger.error(f"发送消息   '{message_preview}'   发往平台'{message.message_info.platform}' 失败: {str(e)}")