mirror of
https://gitee.com/blackfox/geekai.git
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567 lines
16 KiB
Go
567 lines
16 KiB
Go
package chatimpl
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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/handler"
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logger2 "chatplus/logger"
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"chatplus/service/oss"
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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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"net/http"
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"net/url"
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"regexp"
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"strings"
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"time"
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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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)
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const ErrorMsg = "抱歉,AI 助手开小差了,请稍后再试。"
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var ErrImg = "![](/images/wx.png)"
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var logger = logger2.GetLogger()
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type ChatHandler struct {
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handler.BaseHandler
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redis *redis.Client
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uploadManager *oss.UploaderManager
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}
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func NewChatHandler(app *core.AppServer, db *gorm.DB, redis *redis.Client, manager *oss.UploaderManager) *ChatHandler {
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return &ChatHandler{
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BaseHandler: handler.BaseHandler{App: app, DB: db},
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redis: redis,
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uploadManager: manager,
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}
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}
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func (h *ChatHandler) Init() {
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// 如果后台有上传微信客服微信二维码,则覆盖
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if h.App.SysConfig.WechatCardURL != "" {
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ErrImg = fmt.Sprintf("![](%s)", h.App.SysConfig.WechatCardURL)
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}
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}
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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 := h.GetLoginUser(c)
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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.Username,
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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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Name: chatModel.Name,
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Value: chatModel.Value,
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Power: chatModel.Power,
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MaxTokens: chatModel.MaxTokens,
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MaxContext: chatModel.MaxContext,
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Temperature: chatModel.Temperature,
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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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h.Init()
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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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client.Close()
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h.App.ChatClients.Delete(sessionId)
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cancelFunc := h.App.ReqCancelFunc.Get(sessionId)
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if cancelFunc != nil {
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cancelFunc()
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h.App.ReqCancelFunc.Delete(sessionId)
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}
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return
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}
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var message types.WsMessage
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err = utils.JsonDecode(string(msg), &message)
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if err != nil {
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continue
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}
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// 心跳消息
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if message.Type == "heartbeat" {
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logger.Debug("收到 Chat 心跳消息:", message.Content)
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continue
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}
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logger.Info("Receive a message: ", message.Content)
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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, utils.InterfaceToString(message.Content), client)
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if err != nil {
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logger.Error(err)
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utils.ReplyChunkMessage(client, types.WsMessage{Type: types.WsEnd})
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} else {
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utils.ReplyChunkMessage(client, types.WsMessage{Type: types.WsEnd})
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logger.Infof("回答完毕: %v", message.Content)
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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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if !h.App.Debug {
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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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}
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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, "未授权用户,您正在进行非法操作!")
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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, ErrImg)
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return nil
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}
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if userVo.Power < session.Model.Power {
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utils.ReplyMessage(ws, fmt.Sprintf("您当前剩余算力(%d)已不足以支付当前模型的单次对话需要消耗的算力(%d)!", userVo.Power, session.Model.Power))
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utils.ReplyMessage(ws, ErrImg)
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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, ErrImg)
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return nil
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}
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// 检查 prompt 长度是否超过了当前模型允许的最大上下文长度
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promptTokens, err := utils.CalcTokens(prompt, session.Model.Value)
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if promptTokens > session.Model.MaxContext {
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utils.ReplyMessage(ws, "对话内容超出了当前模型允许的最大上下文长度!")
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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, types.ChatGLM, types.Baidu, types.XunFei:
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req.Temperature = session.Model.Temperature
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req.MaxTokens = session.Model.MaxTokens
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break
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case types.OpenAI:
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req.Temperature = session.Model.Temperature
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req.MaxTokens = session.Model.MaxTokens
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// OpenAI 支持函数功能
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var items []model.Function
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res := h.DB.Where("enabled", true).Find(&items)
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if res.Error != nil {
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break
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}
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var tools = make([]interface{}, 0)
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for _, v := range items {
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var parameters map[string]interface{}
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err = utils.JsonDecode(v.Parameters, ¶meters)
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if err != nil {
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continue
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}
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required := parameters["required"]
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delete(parameters, "required")
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tools = append(tools, gin.H{
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"type": "function",
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"function": gin.H{
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"name": v.Name,
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"description": v.Description,
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"parameters": parameters,
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"required": required,
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},
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})
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}
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if len(tools) > 0 {
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req.Tools = tools
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req.ToolChoice = "auto"
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}
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case types.QWen:
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req.Parameters = map[string]interface{}{
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"max_tokens": session.Model.MaxTokens,
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"temperature": session.Model.Temperature,
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}
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break
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default:
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utils.ReplyMessage(ws, "不支持的平台:"+session.Model.Platform+",请联系管理员!")
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utils.ReplyMessage(ws, ErrImg)
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return nil
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}
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// 加载聊天上下文
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chatCtx := make([]types.Message, 0)
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messages := make([]types.Message, 0)
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if h.App.SysConfig.EnableContext {
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if h.App.ChatContexts.Has(session.ChatId) {
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messages = h.App.ChatContexts.Get(session.ChatId)
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} else {
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_ = utils.JsonDecode(role.Context, &messages)
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if h.App.SysConfig.ContextDeep > 0 {
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var historyMessages []model.ChatMessage
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res := h.DB.Where("chat_id = ? and use_context = 1", session.ChatId).Limit(h.App.SysConfig.ContextDeep).Order("id DESC").Find(&historyMessages)
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if res.Error == nil {
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for i := len(historyMessages) - 1; i >= 0; i-- {
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msg := historyMessages[i]
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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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// 计算当前请求的 token 总长度,确保不会超出最大上下文长度
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// MaxContextLength = Response + Tool + Prompt + Context
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tokens := req.MaxTokens // 最大响应长度
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tks, _ := utils.CalcTokens(utils.JsonEncode(req.Tools), req.Model)
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tokens += tks + promptTokens
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for _, v := range messages {
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tks, _ := utils.CalcTokens(v.Content, req.Model)
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// 上下文 token 超出了模型的最大上下文长度
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if tokens+tks >= session.Model.MaxContext {
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break
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}
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// 上下文的深度超出了模型的最大上下文深度
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if len(chatCtx) >= h.App.SysConfig.ContextDeep {
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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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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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if session.Model.Platform == types.QWen {
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req.Input = map[string]interface{}{"prompt": prompt}
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if len(reqMgs) > 0 {
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req.Input["messages"] = reqMgs
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}
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} else {
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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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}
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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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case types.Baidu:
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return h.sendBaiduMessage(chatCtx, req, userVo, ctx, session, role, prompt, ws)
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case types.XunFei:
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return h.sendXunFeiMessage(chatCtx, req, userVo, ctx, session, role, prompt, ws)
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case types.QWen:
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return h.sendQWenMessage(chatCtx, req, userVo, ctx, session, role, prompt, ws)
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}
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utils.ReplyChunkMessage(ws, types.WsMessage{
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Type: types.WsMiddle,
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Content: fmt.Sprintf("Not supported platform: %s", session.Model.Platform),
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})
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return nil
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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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ChatId string `json:"chat_id"`
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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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// 如果没有传入 text 字段,则说明是获取当前 reply 总的 token 消耗(带上下文)
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if data.Text == "" && data.ChatId != "" {
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var item model.ChatMessage
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userId, _ := c.Get(types.LoginUserID)
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res := h.DB.Where("user_id = ?", userId).Where("chat_id = ?", data.ChatId).Last(&item)
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if res.Error != nil {
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resp.ERROR(c, res.Error.Error())
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return
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}
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resp.SUCCESS(c, item.Tokens)
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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 *model.ApiKey) (*http.Response, error) {
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res := h.DB.Where("platform = ?", platform).Where("type = ?", "chat").Where("enabled = ?", true).Order("last_used_at ASC").First(apiKey)
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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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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(apiKey.ApiURL, "{model}", md, 1)
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break
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case types.ChatGLM:
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apiURL = strings.Replace(apiKey.ApiURL, "{model}", req.Model, 1)
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req.Prompt = req.Messages // 使用 prompt 字段替代 message 字段
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req.Messages = nil
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break
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case types.Baidu:
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apiURL = strings.Replace(apiKey.ApiURL, "{model}", req.Model, 1)
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break
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case types.QWen:
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apiURL = apiKey.ApiURL
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req.Messages = nil
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break
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default:
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apiURL = apiKey.ApiURL
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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(apiKey).UpdateColumn("last_used_at", time.Now().Unix())
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// 百度文心,需要串接 access_token
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if platform == types.Baidu {
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token, err := h.getBaiduToken(apiKey.Value)
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if err != nil {
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return nil, err
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}
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logger.Info("百度文心 Access_Token:", token)
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apiURL = fmt.Sprintf("%s?access_token=%s", apiURL, token)
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}
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logger.Debugf(utils.JsonEncode(req))
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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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var proxyURL string
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if len(apiKey.ProxyURL) > 5 { // 使用代理
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proxy, _ := url.Parse(apiKey.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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logger.Debugf("Sending %s request, ApiURL:%s, API KEY:%s, PROXY: %s, Model: %s", platform, apiURL, apiKey.Value, 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.Value)
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break
|
||
case types.ChatGLM:
|
||
token, err := h.getChatGLMToken(apiKey.Value)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
|
||
break
|
||
case types.Baidu:
|
||
request.RequestURI = ""
|
||
case types.OpenAI:
|
||
request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", apiKey.Value))
|
||
break
|
||
case types.QWen:
|
||
request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", apiKey.Value))
|
||
request.Header.Set("X-DashScope-SSE", "enable")
|
||
break
|
||
}
|
||
return client.Do(request)
|
||
}
|
||
|
||
// 扣减用户算力
|
||
func (h *ChatHandler) subUserPower(userVo vo.User, session *types.ChatSession, promptTokens int, replyTokens int) {
|
||
power := 1
|
||
if session.Model.Power > 0 {
|
||
power = session.Model.Power
|
||
}
|
||
res := h.DB.Model(&model.User{}).Where("id = ?", userVo.Id).UpdateColumn("power", gorm.Expr("power - ?", power))
|
||
if res.Error == nil {
|
||
// 记录算力消费日志
|
||
var u model.User
|
||
h.DB.Where("id", userVo.Id).First(&u)
|
||
h.DB.Create(&model.PowerLog{
|
||
UserId: userVo.Id,
|
||
Username: userVo.Username,
|
||
Type: types.PowerConsume,
|
||
Amount: power,
|
||
Mark: types.PowerSub,
|
||
Balance: u.Power,
|
||
Model: session.Model.Value,
|
||
Remark: fmt.Sprintf("模型名称:%s, 提问长度:%d,回复长度:%d", session.Model.Name, promptTokens, replyTokens),
|
||
CreatedAt: time.Now(),
|
||
})
|
||
}
|
||
|
||
}
|
||
|
||
// 将AI回复消息中生成的图片链接下载到本地
|
||
func (h *ChatHandler) extractImgUrl(text string) string {
|
||
pattern := `!\[([^\]]*)]\(([^)]+)\)`
|
||
re := regexp.MustCompile(pattern)
|
||
matches := re.FindAllStringSubmatch(text, -1)
|
||
|
||
// 下载图片并替换链接地址
|
||
for _, match := range matches {
|
||
imageURL := match[2]
|
||
logger.Debug(imageURL)
|
||
// 对于相同地址的图片,已经被替换了,就不再重复下载了
|
||
if !strings.Contains(text, imageURL) {
|
||
continue
|
||
}
|
||
|
||
newImgURL, err := h.uploadManager.GetUploadHandler().PutImg(imageURL, false)
|
||
if err != nil {
|
||
logger.Error("error with download image: ", err)
|
||
continue
|
||
}
|
||
|
||
text = strings.ReplaceAll(text, imageURL, newImgURL)
|
||
}
|
||
return text
|
||
}
|