mirror of
https://gitee.com/blackfox/geekai.git
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274 lines
7.4 KiB
Go
274 lines
7.4 KiB
Go
package chatimpl
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import (
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"bufio"
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"chatplus/core/types"
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"chatplus/store/model"
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"chatplus/store/vo"
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"chatplus/utils"
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"context"
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"encoding/json"
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"fmt"
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"html/template"
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"io"
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"net/http"
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"strings"
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"time"
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"unicode/utf8"
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)
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type baiduResp struct {
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Id string `json:"id"`
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Object string `json:"object"`
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Created int `json:"created"`
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SentenceId int `json:"sentence_id"`
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IsEnd bool `json:"is_end"`
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IsTruncated bool `json:"is_truncated"`
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Result string `json:"result"`
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NeedClearHistory bool `json:"need_clear_history"`
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Usage struct {
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PromptTokens int `json:"prompt_tokens"`
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CompletionTokens int `json:"completion_tokens"`
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TotalTokens int `json:"total_tokens"`
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} `json:"usage"`
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}
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// 百度文心一言消息发送实现
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func (h *ChatHandler) sendBaiduMessage(
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chatCtx []types.Message,
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req types.ApiRequest,
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userVo vo.User,
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ctx context.Context,
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session *types.ChatSession,
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role model.ChatRole,
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prompt string,
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ws *types.WsClient) error {
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promptCreatedAt := time.Now() // 记录提问时间
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start := time.Now()
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var apiKey = model.ApiKey{}
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response, err := h.doRequest(ctx, req, session.Model.Platform, &apiKey)
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logger.Info("HTTP请求完成，耗时：", time.Now().Sub(start))
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if err != nil {
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if strings.Contains(err.Error(), "context canceled") {
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logger.Info("用户取消了请求：", prompt)
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return nil
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} else if strings.Contains(err.Error(), "no available key") {
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utils.ReplyMessage(ws, "抱歉😔😔😔，系统已经没有可用的 API KEY，请联系管理员！")
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return nil
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} else {
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logger.Error(err)
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}
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utils.ReplyMessage(ws, ErrorMsg)
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utils.ReplyMessage(ws, ErrImg)
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return err
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} else {
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defer response.Body.Close()
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}
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contentType := response.Header.Get("Content-Type")
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if strings.Contains(contentType, "text/event-stream") {
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replyCreatedAt := time.Now() // 记录回复时间
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// 循环读取 Chunk 消息
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var message = types.Message{}
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var contents = make([]string, 0)
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var content string
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scanner := bufio.NewScanner(response.Body)
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for scanner.Scan() {
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line := scanner.Text()
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if len(line) < 5 || strings.HasPrefix(line, "id:") {
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continue
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}
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if strings.HasPrefix(line, "data:") {
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content = line[5:]
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}
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// 处理代码换行
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if len(content) == 0 {
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content = "\n"
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}
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var resp baiduResp
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err := utils.JsonDecode(content, &resp)
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if err != nil {
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logger.Error("error with parse data line: ", err)
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utils.ReplyMessage(ws, fmt.Sprintf("**解析数据行失败：%s**", err))
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break
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}
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if len(contents) == 0 {
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utils.ReplyChunkMessage(ws, types.WsMessage{Type: types.WsStart})
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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: utils.InterfaceToString(resp.Result),
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})
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contents = append(contents, resp.Result)
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if resp.IsTruncated {
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utils.ReplyMessage(ws, "AI 输出异常中断")
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break
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}
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if resp.IsEnd {
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break
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}
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} // end for
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if err := scanner.Err(); err != nil {
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if strings.Contains(err.Error(), "context canceled") {
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logger.Info("用户取消了请求：", prompt)
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} else {
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logger.Error("信息读取出错：", err)
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}
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}
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// 消息发送成功
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if len(contents) > 0 {
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if message.Role == "" {
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message.Role = "assistant"
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}
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message.Content = strings.Join(contents, "")
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useMsg := types.Message{Role: "user", Content: prompt}
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// 更新上下文消息，如果是调用函数则不需要更新上下文
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if h.App.SysConfig.EnableContext {
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chatCtx = append(chatCtx, useMsg) // 提问消息
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chatCtx = append(chatCtx, message) // 回复消息
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h.App.ChatContexts.Put(session.ChatId, chatCtx)
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}
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// 追加聊天记录
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// for prompt
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promptToken, err := utils.CalcTokens(prompt, req.Model)
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if err != nil {
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logger.Error(err)
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}
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historyUserMsg := model.ChatMessage{
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UserId: userVo.Id,
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ChatId: session.ChatId,
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RoleId: role.Id,
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Type: types.PromptMsg,
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Icon: userVo.Avatar,
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Content: template.HTMLEscapeString(prompt),
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Tokens: promptToken,
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UseContext: true,
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Model: req.Model,
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}
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historyUserMsg.CreatedAt = promptCreatedAt
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historyUserMsg.UpdatedAt = promptCreatedAt
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res := h.DB.Save(&historyUserMsg)
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if res.Error != nil {
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logger.Error("failed to save prompt history message: ", res.Error)
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}
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// for reply
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// 计算本次对话消耗的总 token 数量
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replyTokens, _ := utils.CalcTokens(message.Content, req.Model)
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totalTokens := replyTokens + getTotalTokens(req)
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historyReplyMsg := model.ChatMessage{
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UserId: userVo.Id,
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ChatId: session.ChatId,
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RoleId: role.Id,
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Type: types.ReplyMsg,
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Icon: role.Icon,
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Content: message.Content,
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Tokens: totalTokens,
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UseContext: true,
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Model: req.Model,
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}
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historyReplyMsg.CreatedAt = replyCreatedAt
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historyReplyMsg.UpdatedAt = replyCreatedAt
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res = h.DB.Create(&historyReplyMsg)
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if res.Error != nil {
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logger.Error("failed to save reply history message: ", res.Error)
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}
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// 更新用户算力
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h.subUserPower(userVo, session, promptToken, replyTokens)
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// 保存当前会话
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var chatItem model.ChatItem
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res = h.DB.Where("chat_id = ?", session.ChatId).First(&chatItem)
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if res.Error != nil {
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chatItem.ChatId = session.ChatId
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chatItem.UserId = session.UserId
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chatItem.RoleId = role.Id
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chatItem.ModelId = session.Model.Id
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if utf8.RuneCountInString(prompt) > 30 {
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chatItem.Title = string([]rune(prompt)[:30]) + "..."
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} else {
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chatItem.Title = prompt
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}
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chatItem.Model = req.Model
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h.DB.Create(&chatItem)
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}
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}
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} else {
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body, err := io.ReadAll(response.Body)
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if err != nil {
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return fmt.Errorf("error with reading response: %v", err)
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}
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var res struct {
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Code int `json:"error_code"`
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Msg string `json:"error_msg"`
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}
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err = json.Unmarshal(body, &res)
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if err != nil {
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return fmt.Errorf("error with decode response: %v", err)
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}
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utils.ReplyMessage(ws, "请求百度文心大模型 API 失败："+res.Msg)
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}
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return nil
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}
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func (h *ChatHandler) getBaiduToken(apiKey string) (string, error) {
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ctx := context.Background()
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tokenString, err := h.redis.Get(ctx, apiKey).Result()
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if err == nil {
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return tokenString, nil
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}
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expr := time.Hour * 24 * 20 // access_token 有效期
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key := strings.Split(apiKey, "|")
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if len(key) != 2 {
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return "", fmt.Errorf("invalid api key: %s", apiKey)
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}
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url := fmt.Sprintf("https://aip.baidubce.com/oauth/2.0/token?client_id=%s&client_secret=%s&grant_type=client_credentials", key[0], key[1])
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client := &http.Client{}
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req, err := http.NewRequest("POST", url, nil)
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if err != nil {
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return "", err
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}
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req.Header.Add("Content-Type", "application/json")
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req.Header.Add("Accept", "application/json")
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res, err := client.Do(req)
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if err != nil {
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return "", fmt.Errorf("error with send request: %w", err)
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}
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defer res.Body.Close()
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body, err := io.ReadAll(res.Body)
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if err != nil {
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return "", fmt.Errorf("error with read response: %w", err)
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}
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var r map[string]interface{}
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err = json.Unmarshal(body, &r)
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if err != nil {
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return "", fmt.Errorf("error with parse response: %w", err)
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}
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if r["error"] != nil {
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return "", fmt.Errorf("error with api response: %s", r["error_description"])
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}
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tokenString = fmt.Sprintf("%s", r["access_token"])
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h.redis.Set(ctx, apiKey, tokenString, expr)
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return tokenString, nil
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}
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