mirror of
https://gitee.com/blackfox/geekai.git
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399 lines
11 KiB
Go
399 lines
11 KiB
Go
package handler
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import (
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"bytes"
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"chatplus/core"
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"chatplus/core/types"
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"chatplus/store"
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"chatplus/store/model"
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"chatplus/store/vo"
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"chatplus/utils"
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"chatplus/utils/resp"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/go-redis/redis/v8"
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"github.com/gorilla/websocket"
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"gorm.io/gorm"
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"net/http"
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"net/url"
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"strings"
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"time"
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)
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const ErrorMsg = "抱歉，AI 助手开小差了，请稍后再试。"
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type ChatHandler struct {
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BaseHandler
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db *gorm.DB
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leveldb *store.LevelDB
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redis *redis.Client
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}
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func NewChatHandler(app *core.AppServer, db *gorm.DB, levelDB *store.LevelDB, redis *redis.Client) *ChatHandler {
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handler := ChatHandler{db: db, leveldb: levelDB, redis: redis}
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handler.App = app
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return &handler
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}
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var chatConfig types.ChatConfig
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// ChatHandle 处理聊天 WebSocket 请求
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func (h *ChatHandler) ChatHandle(c *gin.Context) {
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ws, err := (&websocket.Upgrader{CheckOrigin: func(r *http.Request) bool { return true }}).Upgrade(c.Writer, c.Request, nil)
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if err != nil {
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logger.Error(err)
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return
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}
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sessionId := c.Query("session_id")
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roleId := h.GetInt(c, "role_id", 0)
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chatId := c.Query("chat_id")
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modelId := h.GetInt(c, "model_id", 0)
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client := types.NewWsClient(ws)
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// get model info
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var chatModel model.ChatModel
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res := h.db.First(&chatModel, modelId)
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if res.Error != nil || chatModel.Enabled == false {
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utils.ReplyMessage(client, "当前AI模型暂未启用，连接已关闭！！！")
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c.Abort()
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return
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}
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session := h.App.ChatSession.Get(sessionId)
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if session == nil {
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user, err := utils.GetLoginUser(c, h.db)
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if err != nil {
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logger.Info("用户未登录")
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c.Abort()
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return
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}
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session = &types.ChatSession{
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SessionId: sessionId,
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ClientIP: c.ClientIP(),
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Username: user.Mobile,
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UserId: user.Id,
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}
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h.App.ChatSession.Put(sessionId, session)
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}
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// use old chat data override the chat model and role ID
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var chat model.ChatItem
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res = h.db.Where("chat_id=?", chatId).First(&chat)
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if res.Error == nil {
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chatModel.Id = chat.ModelId
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roleId = int(chat.RoleId)
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}
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session.ChatId = chatId
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session.Model = types.ChatModel{
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Id: chatModel.Id,
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Value: chatModel.Value,
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Platform: types.Platform(chatModel.Platform)}
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logger.Infof("New websocket connected, IP: %s, Username: %s", c.ClientIP(), session.Username)
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var chatRole model.ChatRole
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res = h.db.First(&chatRole, roleId)
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if res.Error != nil || !chatRole.Enable {
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utils.ReplyMessage(client, "当前聊天角色不存在或者未启用，连接已关闭！！！")
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c.Abort()
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return
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}
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// 初始化聊天配置
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var config model.Config
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h.db.Where("marker", "chat").First(&config)
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err = utils.JsonDecode(config.Config, &chatConfig)
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if err != nil {
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utils.ReplyMessage(client, "加载系统配置失败，连接已关闭！！！")
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c.Abort()
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return
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}
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// 保存会话连接
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h.App.ChatClients.Put(sessionId, client)
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go func() {
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for {
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_, msg, err := client.Receive()
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if err != nil {
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logger.Error(err)
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client.Close()
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h.App.ChatClients.Delete(sessionId)
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h.App.ReqCancelFunc.Delete(sessionId)
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return
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}
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message := string(msg)
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logger.Info("Receive a message: ", message)
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//utils.ReplyMessage(client, "这是一条测试消息！")
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ctx, cancel := context.WithCancel(context.Background())
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h.App.ReqCancelFunc.Put(sessionId, cancel)
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// 回复消息
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err = h.sendMessage(ctx, session, chatRole, message, client)
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if err != nil {
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logger.Error(err)
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} else {
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utils.ReplyChunkMessage(client, types.WsMessage{Type: types.WsEnd})
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logger.Info("回答完毕: " + string(message))
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}
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}
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}()
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}
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func (h *ChatHandler) sendMessage(ctx context.Context, session *types.ChatSession, role model.ChatRole, prompt string, ws *types.WsClient) error {
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defer func() {
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if r := recover(); r != nil {
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logger.Error("Recover message from error: ", r)
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}
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}()
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var user model.User
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res := h.db.Model(&model.User{}).First(&user, session.UserId)
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if res.Error != nil {
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utils.ReplyMessage(ws, "非法用户，请联系管理员！")
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return res.Error
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}
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var userVo vo.User
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err := utils.CopyObject(user, &userVo)
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userVo.Id = user.Id
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if err != nil {
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return errors.New("User 对象转换失败，" + err.Error())
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}
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if userVo.Status == false {
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utils.ReplyMessage(ws, "您的账号已经被禁用，如果疑问，请联系管理员！")
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utils.ReplyMessage(ws, "")
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return nil
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}
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if userVo.Calls <= 0 && userVo.ChatConfig.ApiKeys[session.Model.Platform] == "" {
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utils.ReplyMessage(ws, "您的对话次数已经用尽，请联系管理员或者点击左下角菜单加入众筹获得100次对话！")
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utils.ReplyMessage(ws, "")
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return nil
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}
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if userVo.ExpiredTime > 0 && userVo.ExpiredTime <= time.Now().Unix() {
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utils.ReplyMessage(ws, "您的账号已经过期，请联系管理员！")
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utils.ReplyMessage(ws, "")
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return nil
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}
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var req = types.ApiRequest{
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Model: session.Model.Value,
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Stream: true,
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}
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switch session.Model.Platform {
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case types.Azure:
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req.Temperature = h.App.ChatConfig.Azure.Temperature
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req.MaxTokens = h.App.ChatConfig.Azure.MaxTokens
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break
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case types.ChatGLM:
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req.Temperature = h.App.ChatConfig.ChatGML.Temperature
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req.MaxTokens = h.App.ChatConfig.ChatGML.MaxTokens
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break
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default:
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req.Temperature = h.App.ChatConfig.OpenAI.Temperature
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req.MaxTokens = h.App.ChatConfig.OpenAI.MaxTokens
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var functions = make([]types.Function, 0)
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for _, f := range types.InnerFunctions {
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if !h.App.SysConfig.EnabledDraw && f.Name == types.FuncMidJourney {
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continue
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}
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functions = append(functions, f)
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}
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req.Functions = functions
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}
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// 加载聊天上下文
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var chatCtx []interface{}
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if h.App.ChatConfig.EnableContext {
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if h.App.ChatContexts.Has(session.ChatId) {
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chatCtx = h.App.ChatContexts.Get(session.ChatId)
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} else {
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// calculate the tokens of current request, to prevent to exceeding the max tokens num
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tokens := req.MaxTokens
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for _, f := range types.InnerFunctions {
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tks, _ := utils.CalcTokens(utils.JsonEncode(f), req.Model)
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tokens += tks
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}
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// loading the role context
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var messages []types.Message
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err := utils.JsonDecode(role.Context, &messages)
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if err == nil {
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for _, v := range messages {
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tks, _ := utils.CalcTokens(v.Content, req.Model)
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if tokens+tks >= types.ModelToTokens[req.Model] {
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break
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}
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tokens += tks
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chatCtx = append(chatCtx, v)
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}
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}
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// loading recent chat history as chat context
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if chatConfig.ContextDeep > 0 {
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var historyMessages []model.HistoryMessage
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res := h.db.Where("chat_id = ? and use_context = 1", session.ChatId).Limit(chatConfig.ContextDeep).Order("created_at desc").Find(&historyMessages)
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if res.Error == nil {
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for _, msg := range historyMessages {
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if tokens+msg.Tokens >= types.ModelToTokens[session.Model.Value] {
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break
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}
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tokens += msg.Tokens
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ms := types.Message{Role: "user", Content: msg.Content}
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if msg.Type == types.ReplyMsg {
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ms.Role = "assistant"
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}
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chatCtx = append(chatCtx, ms)
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}
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}
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}
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}
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logger.Debugf("聊天上下文：%+v", chatCtx)
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}
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reqMgs := make([]interface{}, 0)
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for _, m := range chatCtx {
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reqMgs = append(reqMgs, m)
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}
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req.Messages = append(reqMgs, map[string]interface{}{
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"role": "user",
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"content": prompt,
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})
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switch session.Model.Platform {
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case types.Azure:
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return h.sendAzureMessage(chatCtx, req, userVo, ctx, session, role, prompt, ws)
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case types.OpenAI:
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return h.sendOpenAiMessage(chatCtx, req, userVo, ctx, session, role, prompt, ws)
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case types.ChatGLM:
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return h.sendChatGLMMessage(chatCtx, req, userVo, ctx, session, role, prompt, ws)
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}
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return fmt.Errorf("not supported platform: %s", session.Model.Platform)
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}
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// Tokens 统计 token 数量
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func (h *ChatHandler) Tokens(c *gin.Context) {
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var data struct {
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Text string `json:"text"`
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Model string `json:"model"`
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}
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if err := c.ShouldBindJSON(&data); err != nil {
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resp.ERROR(c, types.InvalidArgs)
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return
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}
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tokens, err := utils.CalcTokens(data.Text, data.Model)
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if err != nil {
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resp.ERROR(c, err.Error())
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return
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}
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resp.SUCCESS(c, tokens)
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}
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func getTotalTokens(req types.ApiRequest) int {
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encode := utils.JsonEncode(req.Messages)
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var items []map[string]interface{}
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err := utils.JsonDecode(encode, &items)
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if err != nil {
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return 0
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}
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tokens := 0
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for _, item := range items {
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content, ok := item["content"]
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if ok && !utils.IsEmptyValue(content) {
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t, err := utils.CalcTokens(utils.InterfaceToString(content), req.Model)
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if err == nil {
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tokens += t
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}
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}
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}
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return tokens
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}
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// StopGenerate 停止生成
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func (h *ChatHandler) StopGenerate(c *gin.Context) {
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sessionId := c.Query("session_id")
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if h.App.ReqCancelFunc.Has(sessionId) {
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h.App.ReqCancelFunc.Get(sessionId)()
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h.App.ReqCancelFunc.Delete(sessionId)
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}
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resp.SUCCESS(c, types.OkMsg)
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}
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// 发送请求到 OpenAI 服务器
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// useOwnApiKey: 是否使用了用户自己的 API KEY
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func (h *ChatHandler) doRequest(ctx context.Context, req types.ApiRequest, platform types.Platform, apiKey *string) (*http.Response, error) {
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var apiURL string
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switch platform {
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case types.Azure:
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md := strings.Replace(req.Model, ".", "", 1)
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apiURL = strings.Replace(h.App.ChatConfig.Azure.ApiURL, "{model}", md, 1)
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break
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case types.ChatGLM:
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apiURL = strings.Replace(h.App.ChatConfig.ChatGML.ApiURL, "{model}", req.Model, 1)
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req.Prompt = req.Messages
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req.Messages = nil
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break
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default:
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apiURL = h.App.ChatConfig.OpenAI.ApiURL
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}
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// 创建 HttpClient 请求对象
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var client *http.Client
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requestBody, err := json.Marshal(req)
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if err != nil {
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return nil, err
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}
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request, err := http.NewRequest(http.MethodPost, apiURL, bytes.NewBuffer(requestBody))
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if err != nil {
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return nil, err
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}
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request = request.WithContext(ctx)
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request.Header.Set("Content-Type", "application/json")
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proxyURL := h.App.Config.ProxyURL
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if proxyURL != "" && platform == types.OpenAI { // 使用代理
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proxy, _ := url.Parse(proxyURL)
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client = &http.Client{
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Transport: &http.Transport{
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Proxy: http.ProxyURL(proxy),
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},
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}
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} else {
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client = http.DefaultClient
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}
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if *apiKey == "" {
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var key model.ApiKey
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res := h.db.Where("platform = ?", platform).Order("last_used_at ASC").First(&key)
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if res.Error != nil {
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return nil, errors.New("no available key, please import key")
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}
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// 更新 API KEY 的最后使用时间
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h.db.Model(&key).UpdateColumn("last_used_at", time.Now().Unix())
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*apiKey = key.Value
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}
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logger.Infof("Sending %s request, KEY: %s, PROXY: %s, Model: %s", platform, *apiKey, proxyURL, req.Model)
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switch platform {
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case types.Azure:
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request.Header.Set("api-key", *apiKey)
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break
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case types.ChatGLM:
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token, err := h.getChatGLMToken(*apiKey)
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if err != nil {
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return nil, err
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}
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logger.Info(token)
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request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
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break
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default:
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request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiKey))
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}
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return client.Do(request)
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}
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