sessions

package module
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 Go to latest Published: Dec 28, 2022 License: MIT Imports: 6 Imported by: 0

README

sessions

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Gin middleware for session management with multi-backend support:

Usage

Start using it

Download and install it:

go get github.com/gin-contrib/sessions

Import it in your code:

import "github.com/gin-contrib/sessions"

Basic Examples

single session
package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/cookie"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store := cookie.NewStore([]byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/hello", func(c *gin.Context) {
    session := sessions.Default(c)

    if session.Get("hello") != "world" {
      session.Set("hello", "world")
      session.Save()
    }

    c.JSON(200, gin.H{"hello": session.Get("hello")})
  })
  r.Run(":8000")
}
multiple sessions
package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/cookie"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store := cookie.NewStore([]byte("secret"))
  sessionNames := []string{"a", "b"}
  r.Use(sessions.SessionsMany(sessionNames, store))

  r.GET("/hello", func(c *gin.Context) {
    sessionA := sessions.DefaultMany(c, "a")
    sessionB := sessions.DefaultMany(c, "b")

    if sessionA.Get("hello") != "world!" {
      sessionA.Set("hello", "world!")
      sessionA.Save()
    }

    if sessionB.Get("hello") != "world?" {
      sessionB.Set("hello", "world?")
      sessionB.Save()
    }

    c.JSON(200, gin.H{
      "a": sessionA.Get("hello"),
      "b": sessionB.Get("hello"),
    })
  })
  r.Run(":8000")
}

Backend Examples

package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/cookie"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store := cookie.NewStore([]byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
Redis
package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/redis"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store, _ := redis.NewStore(10, "tcp", "localhost:6379", "", []byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
Memcached
ASCII Protocol
package main

import (
  "github.com/bradfitz/gomemcache/memcache"
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/memcached"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store := memcached.NewStore(memcache.New("localhost:11211"), "", []byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
Binary protocol (with optional SASL authentication)
package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/memcached"
  "github.com/gin-gonic/gin"
  "github.com/memcachier/mc"
)

func main() {
  r := gin.Default()
  client := mc.NewMC("localhost:11211", "username", "password")
  store := memcached.NewMemcacheStore(client, "", []byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
MongoDB
mgo
package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/mongo/mongomgo"
  "github.com/gin-gonic/gin"
  "github.com/globalsign/mgo"
)

func main() {
  r := gin.Default()
  session, err := mgo.Dial("localhost:27017/test")
  if err != nil {
    // handle err
  }

  c := session.DB("").C("sessions")
  store := mongomgo.NewStore(c, 3600, true, []byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
mongo-driver
package main

import (
  "context"
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/mongo/mongodriver"
  "github.com/gin-gonic/gin"
  "go.mongodb.org/mongo-driver/mongo"
  "go.mongodb.org/mongo-driver/mongo/options"
)

func main() {
  r := gin.Default()
  mongoOptions := options.Client().ApplyURI("mongodb://localhost:27017")
  client, err := mongo.NewClient(mongoOptions)
  if err != nil {
    // handle err
  }

  if err := client.Connect(context.Background()); err != nil {
    // handle err
  }

  c := client.Database("test").Collection("sessions")
  store := mongodriver.NewStore(c, 3600, true, []byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
memstore
package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/memstore"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store := memstore.NewStore([]byte("secret"))
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
GoRM
package main

import (
  "github.com/gin-contrib/sessions"
  gormsessions "github.com/gin-contrib/sessions/gorm"
  "github.com/gin-gonic/gin"
  "gorm.io/driver/sqlite"
  "gorm.io/gorm"
)

func main() {
  db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
  if err != nil {
    panic(err)
  }
  store := gormsessions.NewStore(db, true, []byte("secret"))

  r := gin.Default()
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}
PostgreSQL
package main

import (
  "database/sql"
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/postgres"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  db, err := sql.Open("postgres", "postgresql://username:password@localhost:5432/database")
  if err != nil {
    // handle err
  }

  store, err := postgres.NewStore(db, []byte("secret"))
  if err != nil {
    // handle err
  }

  r.Use(sessions.Sessions("mysession", store))

  r.GET("/incr", func(c *gin.Context) {
    session := sessions.Default(c)
    var count int
    v := session.Get("count")
    if v == nil {
      count = 0
    } else {
      count = v.(int)
      count++
    }
    session.Set("count", count)
    session.Save()
    c.JSON(200, gin.H{"count": count})
  })
  r.Run(":8000")
}

Documentation

Index

Constants

View Source 
const (
	DefaultKey = "github.com/conspirey/sessions"
)

Variables

This section is empty.

Functions

func Sessions 

func Sessions(name string, store Store) gin.HandlerFunc

func SessionsMany 

func SessionsMany(names []string, store Store) gin.HandlerFunc

func Test 

func Test()

Types

type Options 

type Options struct {
	Path   string
	Domain string
	// MaxAge=0 means no 'Max-Age' attribute specified.
	// MaxAge<0 means delete cookie now, equivalently 'Max-Age: 0'.
	// MaxAge>0 means Max-Age attribute present and given in seconds.
	MaxAge   int
	Secure   bool
	HttpOnly bool
	// rfc-draft to preventing CSRF: https://tools.ietf.org/html/draft-west-first-party-cookies-07
	//   refer: https://godoc.org/net/http
	//          https://www.sjoerdlangkemper.nl/2016/04/14/preventing-csrf-with-samesite-cookie-attribute/
	SameSite http.SameSite
}

Options stores configuration for a session or session store. Fields are a subset of http.Cookie fields.

func (Options) ToGorillaOptions 

func (options Options) ToGorillaOptions() *gsessions.Options

type Session 

type Session interface {
	// ID of the session, generated by stores. It should not be used for user data.
	ID() string
	// Get returns the session value associated to the given key.
	Get(key interface{}) interface{}
	// Set sets the session value associated to the given key.
	Set(key interface{}, val interface{})
	// Delete removes the session value associated to the given key.
	Delete(key interface{})
	// Clear deletes all values in the session.
	Clear()
	// AddFlash adds a flash message to the session.
	// A single variadic argument is accepted, and it is optional: it defines the flash key.
	// If not defined "_flash" is used by default.
	AddFlash(value interface{}, vars ...string)
	// Flashes returns a slice of flash messages from the session.
	// A single variadic argument is accepted, and it is optional: it defines the flash key.
	// If not defined "_flash" is used by default.
	Flashes(vars ...string) []interface{}
	// Options sets configuration for a session.
	Options(Options)
	// Save saves all sessions used during the current request.
	Save() error
}

Wraps thinly gorilla-session methods. Session stores the values and optional configuration for a session.

func Default 

func Default(c *gin.Context) Session

shortcut to get session

func DefaultMany 

func DefaultMany(c *gin.Context, name string) Session

shortcut to get session with given name

type Store 

type Store interface {
	gsessions.Store
	Options(Options)
}

Source Files

View all Source files

Directories

Path Synopsis
_example
cookie
gorm
memcached/ascii
memcached/binary
memstore
mongo/mongodriver
mongo/mongomgo
postgres
redis
mongo
mongodriver
mongomgo
Package sessions provides cookie and filesystem sessions and infrastructure for custom session backends.
 Package sessions provides cookie and filesystem sessions and infrastructure for custom session backends.
Package tester is a package to test each packages of session stores, such as cookie, redis, memcached, mongo, memstore.
 Package tester is a package to test each packages of session stores, such as cookie, redis, memcached, mongo, memstore.

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