session is a Go session manager. It can use many session providers. Just like the database/sql
and database/sql/driver
.
go get github.com/astaxie/beego/session
As of now this session manager support memory, file, Redis and MySQL.
First you must import it
import (
"github.com/astaxie/beego/session"
)
Then in you web app init the global session manager
var globalSessions *session.Manager
-
Use memory as provider:
func init() { globalSessions, _ = session.NewManager("memory", `{"cookieName":"gosessionid","gclifetime":3600}`) go globalSessions.GC() }
-
Use file as provider, the last param is the path where you want file to be stored:
func init() { globalSessions, _ = session.NewManager("file",`{"cookieName":"gosessionid","gclifetime":3600,"ProviderConfig":"./tmp"}`) go globalSessions.GC() }
-
Use Redis as provider, the last param is the Redis conn address,poolsize,password:
func init() { globalSessions, _ = session.NewManager("redis", `{"cookieName":"gosessionid","gclifetime":3600,"ProviderConfig":"127.0.0.1:6379,100,astaxie"}`) go globalSessions.GC() }
-
Use MySQL as provider, the last param is the DSN, learn more from mysql:
func init() { globalSessions, _ = session.NewManager( "mysql", `{"cookieName":"gosessionid","gclifetime":3600,"ProviderConfig":"username:password@protocol(address)/dbname?param=value"}`) go globalSessions.GC() }
-
Use Cookie as provider:
func init() { globalSessions, _ = session.NewManager( "cookie", `{"cookieName":"gosessionid","enableSetCookie":false,"gclifetime":3600,"ProviderConfig":"{\"cookieName\":\"gosessionid\",\"securityKey\":\"beegocookiehashkey\"}"}`) go globalSessions.GC() }
Finally in the handlerfunc you can use it like this
func login(w http.ResponseWriter, r *http.Request) {
sess := globalSessions.SessionStart(w, r)
defer sess.SessionRelease(w)
username := sess.Get("username")
fmt.Println(username)
if r.Method == "GET" {
t, _ := template.ParseFiles("login.gtpl")
t.Execute(w, nil)
} else {
fmt.Println("username:", r.Form["username"])
sess.Set("username", r.Form["username"])
fmt.Println("password:", r.Form["password"])
}
}
When you develop a web app, maybe you want to write own provider because you must meet the requirements.
Writing a provider is easy. You only need to define two struct types (Session and Provider), which satisfy the interface definition. Maybe you will find the memory provider is a good example.
type SessionStore interface {
Set(key, value interface{}) error //set session value
Get(key interface{}) interface{} //get session value
Delete(key interface{}) error //delete session value
SessionID() string //back current sessionID
SessionRelease(w http.ResponseWriter) // release the resource & save data to provider & return the data
Flush() error //delete all data
}
type Provider interface {
SessionInit(gclifetime int64, config string) error
SessionRead(sid string) (SessionStore, error)
SessionExist(sid string) bool
SessionRegenerate(oldsid, sid string) (SessionStore, error)
SessionDestroy(sid string) error
SessionAll() int //get all active session
SessionGC()
}
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