mirror of
https://github.com/yangjian102621/geekai.git
synced 2025-09-17 16:56:38 +08:00
306 lines
8.6 KiB
Go
306 lines
8.6 KiB
Go
package server
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import (
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"embed"
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"encoding/json"
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"github.com/gin-contrib/sessions"
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"github.com/gin-contrib/sessions/cookie"
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"github.com/gin-gonic/gin"
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"io"
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"io/fs"
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"net/http"
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logger2 "openai/logger"
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"openai/types"
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"openai/utils"
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"os"
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"path/filepath"
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"runtime/debug"
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"strings"
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"time"
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)
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var logger = logger2.GetLogger()
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type StaticFile struct {
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embedFS embed.FS
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path string
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}
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func (s StaticFile) Open(name string) (fs.File, error) {
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filename := filepath.Join(s.path, strings.TrimLeft(name, "/"))
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file, err := s.embedFS.Open(filename)
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return file, err
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}
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type Server struct {
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Config *types.Config
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ConfigPath string
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ChatContexts map[string]types.ChatContext // 聊天上下文 [SessionID+ChatRole] => ChatContext
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// 保存 Websocket 会话 Username, 每个 Username 只能连接一次
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// 防止第三方直接连接 socket 调用 OpenAI API
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ChatSession map[string]types.ChatSession
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ApiKeyAccessStat map[string]int64 // 记录每个 API Key 的最后访问之间，保持在 15/min 之内
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DebugMode bool // 是否开启调试模式
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}
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func NewServer(configPath string) (*Server, error) {
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// load service configs
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config, err := utils.LoadConfig(configPath)
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if err != nil {
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return nil, err
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}
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roles := GetChatRoles()
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if len(roles) == 0 { // 初始化默认聊天角色到 leveldb
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roles = types.GetDefaultChatRole()
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for _, v := range roles {
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err := PutChatRole(v)
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if err != nil {
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return nil, err
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}
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}
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}
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return &Server{
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Config: config,
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ConfigPath: configPath,
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ChatContexts: make(map[string]types.ChatContext, 16),
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ChatSession: make(map[string]types.ChatSession),
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ApiKeyAccessStat: make(map[string]int64),
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}, nil
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}
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func (s *Server) Run(webRoot embed.FS, path string, debug bool) {
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s.DebugMode = debug
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gin.SetMode(gin.ReleaseMode)
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gin.DefaultWriter = io.Discard
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engine := gin.Default()
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if debug {
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engine.Use(corsMiddleware())
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}
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engine.Use(sessionMiddleware(s.Config))
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engine.Use(AuthorizeMiddleware(s))
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engine.Use(Recover)
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engine.POST("/test", s.TestHandle)
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engine.GET("/api/session/get", s.GetSessionHandle)
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engine.POST("/api/login", s.LoginHandle)
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engine.Any("/api/chat", s.ChatHandle)
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engine.POST("api/chat/history", s.GetChatHistoryHandle)
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engine.POST("api/chat/history/clear", s.ClearHistoryHandle)
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engine.POST("/api/config/set", s.ConfigSetHandle)
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engine.GET("/api/config/chat-roles/get", s.GetChatRoleListHandle)
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engine.POST("api/config/user/add", s.AddUserHandle)
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engine.POST("api/config/user/batch-add", s.BatchAddUserHandle)
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engine.POST("api/config/user/set", s.SetUserHandle)
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engine.POST("api/config/user/list", s.GetUserListHandle)
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engine.POST("api/config/user/remove", s.RemoveUserHandle)
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engine.POST("api/config/apikey/add", s.AddApiKeyHandle)
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engine.POST("api/config/apikey/remove", s.RemoveApiKeyHandle)
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engine.POST("api/config/apikey/list", s.ListApiKeysHandle)
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engine.POST("api/config/role/set", s.SetChatRoleHandle)
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engine.POST("api/config/role/get", s.GetChatRoleHandle)
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engine.POST("api/config/proxy/add", s.AddProxyHandle)
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engine.POST("api/config/proxy/remove", s.RemoveProxyHandle)
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engine.POST("api/config/debug", s.SetDebugHandle)
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engine.NoRoute(func(c *gin.Context) {
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if c.Request.URL.Path == "/favicon.ico" {
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c.Redirect(http.StatusMovedPermanently, "/chat/"+c.Request.URL.Path)
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}
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})
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// process front-end web static files
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engine.StaticFS("/chat", http.FS(StaticFile{
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embedFS: webRoot,
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path: path,
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}))
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// 定时清理过期的会话
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go func() {
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for {
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for key, context := range s.ChatContexts {
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// 清理超过 60min 没有更新，则表示为过期会话
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if time.Now().Unix()-context.LastAccessTime > int64(s.Config.Chat.ChatContextExpireTime) {
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logger.Infof("清理会话上下文: %s", key)
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delete(s.ChatContexts, key)
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}
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}
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time.Sleep(time.Second * 5) // 每隔 5 秒钟清理一次
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}
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}()
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logger.Infof("http://%s", s.Config.Listen)
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err := engine.Run(s.Config.Listen)
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if err != nil {
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logger.Error("Fail to start server:", err.Error())
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os.Exit(1)
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}
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}
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func Recover(c *gin.Context) {
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defer func() {
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if r := recover(); r != nil {
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logger.Error("panic: %v\n", r)
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debug.PrintStack()
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c.JSON(http.StatusOK, types.BizVo{Code: types.Failed, Message: types.ErrorMsg})
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c.Abort()
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}
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}()
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//加载完 defer recover，继续后续接口调用
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c.Next()
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}
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func sessionMiddleware(config *types.Config) gin.HandlerFunc {
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// encrypt the cookie
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store := cookie.NewStore([]byte(config.Session.SecretKey))
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store.Options(sessions.Options{
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Path: config.Session.Path,
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Domain: config.Session.Domain,
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MaxAge: config.Session.MaxAge,
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Secure: config.Session.Secure,
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HttpOnly: config.Session.HttpOnly,
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SameSite: config.Session.SameSite,
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})
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return sessions.Sessions(config.Session.Name, store)
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}
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// 跨域中间件设置
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func corsMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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method := c.Request.Method
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origin := c.Request.Header.Get("Origin")
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if origin != "" {
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// 设置允许的请求源
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c.Header("Access-Control-Allow-Origin", origin)
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c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
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//允许跨域设置可以返回其他子段，可以自定义字段
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c.Header("Access-Control-Allow-Headers", "Authorization, Content-Length, Content-Type, ChatGPT-TOKEN, ACCESS_KEY")
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// 允许浏览器（客户端）可以解析的头部 （重要）
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c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers")
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//设置缓存时间
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c.Header("Access-Control-Max-Age", "172800")
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//允许客户端传递校验信息比如 cookie (重要)
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c.Header("Access-Control-Allow-Credentials", "true")
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}
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if method == http.MethodOptions {
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c.JSON(http.StatusOK, "ok!")
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}
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defer func() {
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if err := recover(); err != nil {
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logger.Info("Panic info is: %v", err)
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}
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}()
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c.Next()
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}
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}
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// AuthorizeMiddleware 用户授权验证
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func AuthorizeMiddleware(s *Server) gin.HandlerFunc {
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return func(c *gin.Context) {
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if !s.Config.EnableAuth ||
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c.Request.URL.Path == "/api/login" ||
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c.Request.URL.Path == "/api/config/chat-roles/get" ||
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!strings.HasPrefix(c.Request.URL.Path, "/api") {
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c.Next()
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return
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}
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if strings.HasPrefix(c.Request.URL.Path, "/api/config") {
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accessKey := c.GetHeader("ACCESS_KEY")
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if accessKey != strings.TrimSpace(s.Config.AccessKey) {
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c.Abort()
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c.JSON(http.StatusOK, types.BizVo{Code: types.NotAuthorized, Message: "No Permissions"})
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} else {
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c.Next()
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}
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return
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}
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// WebSocket 连接请求验证
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if c.Request.URL.Path == "/api/chat" {
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sessionId := c.Query("sessionId")
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if session, ok := s.ChatSession[sessionId]; ok && session.ClientIP == c.ClientIP() {
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c.Next()
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} else {
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c.Abort()
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}
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return
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}
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sessionId := c.GetHeader(types.TokenName)
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session := sessions.Default(c)
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userInfo := session.Get(sessionId)
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if userInfo != nil {
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c.Set(types.SessionKey, userInfo)
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c.Next()
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} else {
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c.Abort()
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c.JSON(http.StatusOK, types.BizVo{
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Code: types.NotAuthorized,
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Message: "Not Authorized",
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})
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}
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}
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}
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func (s *Server) GetSessionHandle(c *gin.Context) {
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sessionId := c.GetHeader(types.TokenName)
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if session, ok := s.ChatSession[sessionId]; ok && session.ClientIP == c.ClientIP() {
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c.JSON(http.StatusOK, types.BizVo{Code: types.Success})
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} else {
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c.JSON(http.StatusOK, types.BizVo{
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Code: types.NotAuthorized,
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Message: "Not Authorized",
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})
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}
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}
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func (s *Server) LoginHandle(c *gin.Context) {
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var data struct {
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Token string `json:"token"`
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}
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err := json.NewDecoder(c.Request.Body).Decode(&data)
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if err != nil {
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c.JSON(http.StatusOK, types.BizVo{Code: types.Failed, Message: types.ErrorMsg})
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return
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}
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user, err := GetUser(data.Token)
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if err != nil {
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c.JSON(http.StatusOK, types.BizVo{Code: types.Failed, Message: "Invalid user"})
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return
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}
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sessionId := utils.RandString(42)
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session := sessions.Default(c)
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session.Set(sessionId, data.Token)
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err = session.Save()
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if err != nil {
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logger.Error("Error for save session: ", err)
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}
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// 记录客户端 IP 地址
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s.ChatSession[sessionId] = types.ChatSession{ClientIP: c.ClientIP(), Username: data.Token, SessionId: sessionId}
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// 更新用户激活时间
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user.ActiveTime = time.Now().Unix()
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if user.ExpiredTime == 0 {
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activeTime := time.Unix(user.ActiveTime, 0)
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if user.Term == 0 {
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user.Term = 30 // 默认 30 天到期
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}
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user.ExpiredTime = activeTime.Add(time.Hour * 24 * time.Duration(user.Term)).Unix()
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}
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err = PutUser(*user)
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if err != nil {
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c.JSON(http.StatusOK, types.BizVo{Code: types.Failed, Message: "Save user info failed"})
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return
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}
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c.JSON(http.StatusOK, types.BizVo{Code: types.Success, Data: sessionId})
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}
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