Go 尝试实现session管理
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 | package session import ( "fmt" "github.com/satori/go.uuid" "log" "net/http" "net/url" "sync" "time" ) const ( CookieName = "goodsCool" Timeout = 60 * 30 ) var Cmgr *ConversationManager func init() { Cmgr = &ConversationManager{ CookieName: CookieName, MaxAge: Timeout, Storage: MemStorage{DataStorage: make( map [string] interface {}, 0)}, } go Cmgr.GC() } type MemStorage struct { DataStorage map [string] interface {} Lock sync.Mutex ReadWriteLock sync.RWMutex } func (ms *MemStorage) Store(key string, value interface {}) bool { ms.Lock.Lock() storage := ms.DataStorage storage[key] = value ms.Lock.Unlock() return true } func (ms *MemStorage) Load(key string) (value interface {}, ok bool) { ms.ReadWriteLock.RLock() storage := ms.DataStorage value = storage[key] if value != nil { ok = true } else { ok = false } ms.ReadWriteLock.RUnlock() return } func (ms *MemStorage) Delete(key string) (value interface {}) { ms.Lock.Lock() storage := ms.DataStorage if v, ok := storage[key]; ok { value = v } delete(storage, key) ms.Lock.Unlock() return } func (ms *MemStorage) Range() { for key, value := range ms.DataStorage { fmt.Printf( " 遍历 %v,%v\n" , key, value) } } type IConversationManager interface { Create(cid string) (conversation *Conversation, err error) Destroy(cid string) (b bool, err error) GC() } type IConversation interface { Get(key interface {}) (info interface {}, err error) Set(key interface {}, value interface {}) (b bool, err error) } type Conversation struct { LastAccessTime time.Time Cid string CSData MemStorage MaxAge int64 } type ConversationManager struct { CookieName string MaxAge int64 Storage MemStorage } //实现 Create / Distroy / Get / Set 方法 //创建会话 func (cm *ConversationManager) Create(cid string) (*Conversation, error) { //根据cid 创建一个conversatioin storage := cm.Storage value, ok := storage.Load(cid) if ok { conversation := value.(*Conversation) return conversation, nil } m := MemStorage{DataStorage: make( map [string] interface {}, 0)} c2 := &Conversation{ LastAccessTime: time.Now(), Cid: cid, CSData: m, MaxAge: 60 * 30, } cm.Storage.Store(cid, c2) return c2, nil } //getConversation func (cm *ConversationManager) GetConversation(cid string) (conversation *Conversation) { storage := cm.Storage value, ok := storage.Load(cid) if ok { conversation = value.(*Conversation) return conversation } return conversation } // 销毁cid 对应的会话 func (cm *ConversationManager) Destroy(cid string) (b bool, err error) { if _, ok := cm.Storage.Load(cid); ok { cm.Storage.Delete(cid) } return true, nil } func (cm *ConversationManager) GetConversationData(r *http.Request) (mem *MemStorage) { cookie, _ := r.Cookie(CookieName) if cookie != nil { conversationId := cookie.Value conversation := Cmgr.GetConversation(conversationId) return &(conversation.CSData) } else { return nil } } // 会话域存储Get func (c *Conversation) Get(key string) ( interface {}, error) { //log.Println("从", c.Cid, "中取数据:key=", key) if load, ok := c.CSData.Load(key); ok { return load, nil } else { return nil, nil } } // 会话域存储Set func (c *Conversation) Set(key string, value interface {}) (b bool, err error) { c.CSData.Store(key, value) return true, nil } // ConversationManager GC func (cm *ConversationManager) GC() { for { time.Sleep(time.Second * 10) log.Println( "GC ing ..." ) storage := cm.Storage.DataStorage duration := time.Duration(cm.MaxAge * 1000 * 1000 * 1000) now := time.Now() for cid, conversation := range storage { //log.Printf("GC 遍历:%v,%v\n", cid, conversation) if c, ok := conversation.(*Conversation); ok { expire := c.LastAccessTime.Add(duration) //log.Println("如果 expire 大于当前时间:", expire, " 当前时间:now=", now) if now.After(expire) { //将conversation销毁 log.Println( "销毁Conversation: Cid=" , cid) cm.Destroy(cid) } } } } } // 给普通链接处理会话,没有就创建同时处理客户端 //的cookie func (cm *ConversationManager) ManagerNormalRequest(w http.ResponseWriter, r *http.Request) (conversation *Conversation, e error) { cookie, err := r.Cookie(CookieName) if err != nil { e = err } var conversationId string if cookie == nil { conversationId, err = url.QueryUnescape(uuid.Must(uuid.NewV4(), nil).String()) if err != nil { e = err return } } else { conversationId = cookie.Value } //创建Conversation,如果有就返回 cs, err := cm.Create(conversationId) if err != nil { e = err return } cs.LastAccessTime = time.Now() expire := cs.LastAccessTime.Add(time.Duration(cm.MaxAge * 1000 * 1000 * 1000)) //log.Println("expire: ", expire) //设置cookie c := http.Cookie{ Name: CookieName, Value: conversationId, Path: "/" , //Domain: "", Expires: expire, RawExpires: "" , MaxAge: int(cm.MaxAge), Secure: false, HttpOnly: false, SameSite: 0, Raw: "" , Unparsed: nil, } //log.Println(c) http.SetCookie(w, &c) return cs, e } func UUID() (string, error) { conversationId, err := url.QueryUnescape(uuid.Must(uuid.NewV4(), nil).String()) return conversationId, err } func (cm *ConversationManager) ManagerLogin(loginUser interface {}, w http.ResponseWriter, r *http.Request) { cookie, _ := r.Cookie(CookieName) //获取当前时间 now := time.Now() var conversationId string if cookie != nil { //log.Println("已经有了cookie ==>", cookie) conversationId = cookie.Value } else { conversationId, _ = UUID() //log.Println("没有cookie,创建会话 cid=", conversationId) } expire := now.Add(time.Duration(Cmgr.MaxAge * 1000 * 1000 * 1000)) //设置cookie cookie2 := http.Cookie{ Name: CookieName, Value: conversationId, Path: "/" , // Domain: "", Expires: expire, RawExpires: "" , MaxAge: 0, Secure: false, HttpOnly: false, SameSite: 0, Raw: "" , Unparsed: nil, } //存放登录数据 var conversation *Conversation conversation = Cmgr.GetConversation(conversationId) if conversation == nil { create, _ := Cmgr.Create(cookie2.Value) conversation = create } conversation.LastAccessTime = now conversation.Set( "user" , loginUser) log.Println( "存放了User: conversationId:" , conversation.Cid, "存放的用户:" , loginUser) http.SetCookie(w, &cookie2) } |
使用非常简单,添加Gin 中间件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | func ConversationManager() gin.HandlerFunc { return func (c *gin.Context) { url := c.Request.URL // log.Println("当前访问链接:", url.String()) if url.Path == "/login" { //如果是登录链接,就放行 c.Next() session.Cmgr.ManagerNormalRequest(c.Writer, c.Request) return } //判断有没有cookie ,若有cookie 就根据ConversationId寻找后台对应的Conversation //判断Conversation中有没有登录用户 cookie, _ := c.Request.Cookie(session.CookieName) if cookie != nil { conversation := session.Cmgr.GetConversation(cookie.Value) if conversation != nil { login, _ := conversation.Get( "user" ) if login == nil { session.Cmgr.ManagerNormalRequest(c.Writer, c.Request) c.HTML(200, "login.tmpl" , nil) } else { //user := login.(*models.User) //log.Println("conversationId:", conversation.Cid, " 用户: ", user.ToString()) c.Next() } } else { session.Cmgr.ManagerNormalRequest(c.Writer, c.Request) c.HTML(200, "login.tmpl" , nil) } } else { session.Cmgr.ManagerNormalRequest(c.Writer, c.Request) c.HTML(200, "login.tmpl" , nil) } } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 | func main() { router := gin.Default() //router.Use(middleware.Cors()) router.StaticFS( "/static" , http.Dir( "src/static" )) router.StaticFS( "/image/user" , http.Dir(imagePath)) router.LoadHTMLGlob( "src/views/admin/*" ) router.NoRoute(controllers.Handle404) router.Use(middleware.ConversationManager()) router.GET( "/" , controllers.Index) } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | func LoginAction(c *gin.Context) { userName := c.PostForm( "username" ) passWord := c.PostForm( "password" ) u := &models.User{UserName: userName, PassWord: passWord} login, err := u.Login(u) if err != nil { log.Println(err) } if login == nil { c.HTML(http.StatusOK, "login.tmpl" , nil) } else { session.Cmgr.ManagerLogin(login, c.Writer, c.Request) data := make( map [string] interface {}) data[ "loginUser" ] = login c.HTML(http.StatusOK, "index.tmpl" , data) } } |
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