sessionmanager

sessionmanager is a golang session manager. It can use session for many providers.Just like the database/sql and database/sql/driver.

##How to install

go get github.com/astaxie/beego/session

##how many providers support Now this sessionmanager support memory/file/redis/mysql

##How do we use it?

first you must import it

import (
    "github.com/astaxie/beego/session"
)

then in you web app init the globalsession manager

var globalSessions *session.Manager

use memory as providers:

func init() {
    globalSessions, _ = session.NewManager("memory", "gosessionid", 3600,"")
    go globalSessions.GC()
}

use mysql as providers,the last param is the DNS, learn more from mysql:

func init() {
    globalSessions, _ = session.NewManager("mysql", "gosessionid", 3600,"username:password@protocol(address)/dbname?param=value")
    go globalSessions.GC()
}

use file as providers,the last param is the path where to store the file:

func init() {
    globalSessions, _ = session.NewManager("file", "gosessionid", 3600,"./tmp")
    go globalSessions.GC()
}

use redis as providers,the last param is the redis's conn address:

func init() {
    globalSessions, _ = session.NewManager("redis", "gosessionid", 3600,"127.0.0.1:6379")
    go globalSessions.GC()
}

at last 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()
    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"])
    }
}

##How to write own provider When we develop a web app, maybe you want to write a provider because you must meet the requirements.

Write a provider is so easy. You only define two struct type(Session and Provider),which satisfy the interface definition.Maybe The memory provider is a good example for you.

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()                  // release the resource
}

type Provider interface {
    SessionInit(maxlifetime int64, savePath string) error
    SessionRead(sid string) (SessionStore, error)
    SessionDestroy(sid string) error
    SessionGC()
}

##LICENSE

BSD License http://creativecommons.org/licenses/BSD/