The Bhojpur Session is used as a Session Management Engine based on Bhojpur.NET Platform. It can integrate with many session providers. Just like the database/sql and database/sql/driver.

go get github.com/bhojpur/session

As of now this session manager support memory, file, Redis, and MySQL.

Firstly, you must import it

import (
	session "github.com/bhojpur/session/pkg/engine"
)

Then, in your web application initialize the global session manager

var globalSessions *session.Manager

• Use memory as provider:

    func init() {
    	globalSessions, _ = session.NewManager("memory", `{"cookieName":"bsessionid","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":"bsessionid","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":"bsessionid","gclifetime":3600,"ProviderConfig":"127.0.0.1:6379,100,bhojpur"}`)
    	go globalSessions.GC()
    }
  

• Use MySQL as provider, the last param is the DSN, learn more from mysql:

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

• Use Cookie as provider:

    func init() {
    	globalSessions, _ = session.NewManager(
    		"cookie", `{"cookieName":"bsessionid","enableSetCookie":false,"gclifetime":3600,"ProviderConfig":"{\"cookieName\":\"bsessionid\",\"securityKey\":\"bhojpurcookiehashkey\"}"}`)
    	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 application, may be you want to write custom 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, error)
	SessionRegenerate(oldsid, sid string) (SessionStore, error)
	SessionDestroy(sid string) error
	SessionAll() int //get all active session
	SessionGC()
}

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