feat: replace Tools param with Function param for OpenAI chat API

api/handler/chatimpl/azure_handler.go

@@ -19,7 +19,7 @@ import (
 // 微软 Azure 模型消息发送实现
 
 func (h *ChatHandler) sendAzureMessage(
-	chatCtx []interface{},
+	chatCtx []types.Message,
 	req types.ApiRequest,
 	userVo vo.User,
 	ctx context.Context,

api/handler/chatimpl/baidu_handler.go

@@ -36,7 +36,7 @@ type baiduResp struct {
 // 百度文心一言消息发送实现
 
 func (h *ChatHandler) sendBaiduMessage(
-	chatCtx []interface{},
+	chatCtx []types.Message,
 	req types.ApiRequest,
 	userVo vo.User,
 	ctx context.Context,

api/handler/chatimpl/chat_handler.go

@@ -224,6 +224,14 @@ func (h *ChatHandler) sendMessage(ctx context.Context, session *types.ChatSessio
 		utils.ReplyMessage(ws, ErrImg)
 		return nil
 	}
+
+	// 检查 prompt 长度是否超过了当前模型允许的最大上下文长度
+	promptTokens, err := utils.CalcTokens(prompt, session.Model.Value)
+	if promptTokens > types.GetModelMaxToken(session.Model.Value) {
+		utils.ReplyMessage(ws, "对话内容超出了当前模型允许的最大上下文长度！")
+		return nil
+	}
+
 	var req = types.ApiRequest{
 		Model:  session.Model.Value,
 		Stream: true,
@@ -252,7 +260,6 @@ func (h *ChatHandler) sendMessage(ctx context.Context, session *types.ChatSessio
 		}
 
 		var tools = make([]interface{}, 0)
-		var functions = make([]interface{}, 0)
 		for _, v := range items {
 			var parameters map[string]interface{}
 			err = utils.JsonDecode(v.Parameters, &parameters)
@@ -270,20 +277,11 @@ func (h *ChatHandler) sendMessage(ctx context.Context, session *types.ChatSessio
 					"required":    required,
 				},
 			})
-			functions = append(functions, gin.H{
-				"name":        v.Name,
-				"description": v.Description,
-				"parameters":  parameters,
-				"required":    required,
-			})
 		}
 
-		//if len(tools) > 0 {
-		//	req.Tools = tools
-		//	req.ToolChoice = "auto"
-		//}
-		if len(functions) > 0 {
-			req.Functions = functions
+		if len(tools) > 0 {
+			req.Tools = tools
+			req.ToolChoice = "auto"
 		}
 
 	case types.XunFei:
@@ -301,40 +299,19 @@ func (h *ChatHandler) sendMessage(ctx context.Context, session *types.ChatSessio
 	}
 
 	// 加载聊天上下文
-	var chatCtx []interface{}
+	chatCtx := make([]types.Message, 0)
+	messages := make([]types.Message, 0)
 	if h.App.ChatConfig.EnableContext {
 		if h.App.ChatContexts.Has(session.ChatId) {
-			chatCtx = h.App.ChatContexts.Get(session.ChatId)
+			messages = h.App.ChatContexts.Get(session.ChatId)
 		} else {
-			// calculate the tokens of current request, to prevent to exceeding the max tokens num
-			tokens := req.MaxTokens
-			tks, _ := utils.CalcTokens(utils.JsonEncode(req.Tools), req.Model)
-			tokens += tks
-			// loading the role context
-			var messages []types.Message
-			err := utils.JsonDecode(role.Context, &messages)
-			if err == nil {
-				for _, v := range messages {
-					tks, _ := utils.CalcTokens(v.Content, req.Model)
-					if tokens+tks >= types.GetModelMaxToken(req.Model) {
-						break
-					}
-					tokens += tks
-					chatCtx = append(chatCtx, v)
-				}
-			}
-
-			// loading recent chat history as chat context
+			_ = utils.JsonDecode(role.Context, &messages)
 			if chatConfig.ContextDeep > 0 {
 				var historyMessages []model.ChatMessage
-				res := h.db.Debug().Where("chat_id = ? and use_context = 1", session.ChatId).Limit(chatConfig.ContextDeep).Order("id desc").Find(&historyMessages)
+				res := h.db.Where("chat_id = ? and use_context = 1", session.ChatId).Limit(chatConfig.ContextDeep).Order("id DESC").Find(&historyMessages)
 				if res.Error == nil {
 					for i := len(historyMessages) - 1; i >= 0; i-- {
 						msg := historyMessages[i]
-						if tokens+msg.Tokens >= types.GetModelMaxToken(session.Model.Value) {
-							break
-						}
-						tokens += msg.Tokens
 						ms := types.Message{Role: "user", Content: msg.Content}
 						if msg.Type == types.ReplyMsg {
 							ms.Role = "assistant"
@@ -344,6 +321,29 @@ func (h *ChatHandler) sendMessage(ctx context.Context, session *types.ChatSessio
 				}
 			}
 		}
+
+		// 计算当前请求的 token 总长度，确保不会超出最大上下文长度
+		// MaxContextLength = Response + Tool + Prompt + Context
+		tokens := req.MaxTokens // 最大响应长度
+		tks, _ := utils.CalcTokens(utils.JsonEncode(req.Tools), req.Model)
+		tokens += tks + promptTokens
+
+		for _, v := range messages {
+			tks, _ := utils.CalcTokens(v.Content, req.Model)
+			// 上下文 token 超出了模型的最大上下文长度
+			if tokens+tks >= types.GetModelMaxToken(req.Model) {
+				break
+			}
+
+			// 上下文的深度超出了模型的最大上下文深度
+			if len(chatCtx) >= h.App.ChatConfig.ContextDeep {
+				break
+			}
+
+			tokens += tks
+			chatCtx = append(chatCtx, v)
+		}
+
 		logger.Debugf("聊天上下文：%+v", chatCtx)
 	}
 	reqMgs := make([]interface{}, 0)

api/handler/chatimpl/chatglm_handler.go

@@ -20,7 +20,7 @@ import (
 // 清华大学 ChatGML 消息发送实现
 
 func (h *ChatHandler) sendChatGLMMessage(
-	chatCtx []interface{},
+	chatCtx []types.Message,
 	req types.ApiRequest,
 	userVo vo.User,
 	ctx context.Context,

api/handler/chatimpl/openai_handler.go

@@ -20,7 +20,7 @@ import (
 
 // OPenAI 消息发送实现
 func (h *ChatHandler) sendOpenAiMessage(
-	chatCtx []interface{},
+	chatCtx []types.Message,
 	req types.ApiRequest,
 	userVo vo.User,
 	ctx context.Context,
@@ -46,8 +46,10 @@ func (h *ChatHandler) sendOpenAiMessage(
 
 		utils.ReplyMessage(ws, ErrorMsg)
 		utils.ReplyMessage(ws, ErrImg)
-		all, _ := io.ReadAll(response.Body)
-		logger.Error(string(all))
+		if response.Body != nil {
+			all, _ := io.ReadAll(response.Body)
+			logger.Error(string(all))
+		}
 		return err
 	} else {
 		defer response.Body.Close()

api/handler/chatimpl/qwen_handler.go

@@ -31,7 +31,7 @@ type qWenResp struct {
 
 // 通义千问消息发送实现
 func (h *ChatHandler) sendQWenMessage(
-	chatCtx []interface{},
+	chatCtx []types.Message,
 	req types.ApiRequest,
 	userVo vo.User,
 	ctx context.Context,

api/handler/chatimpl/xunfei_handler.go

@@ -58,7 +58,7 @@ var Model2URL = map[string]string{
 // 科大讯飞消息发送实现
 
 func (h *ChatHandler) sendXunFeiMessage(
-	chatCtx []interface{},
+	chatCtx []types.Message,
 	req types.ApiRequest,
 	userVo vo.User,
 	ctx context.Context,