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service.go
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service.go
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package session
import (
"errors"
"fmt"
"log"
"net/http"
"path/filepath"
"sync"
"time"
"github.com/enorith/container"
"github.com/enorith/framework"
"github.com/enorith/framework/cache"
"github.com/enorith/http/contracts"
"github.com/enorith/session"
"github.com/enorith/session/handlers"
"github.com/enorith/supports/reflection"
"github.com/enorith/supports/str"
)
type HandlerRegister func() (session.Handler, error)
var (
sessionHandlerRegisters = make(map[string]HandlerRegister, 0)
sessionHandlers = make(map[string]session.Handler, 0)
mu sync.RWMutex
)
var (
handlerType = reflection.InterfaceType[session.Handler]()
Manager *session.Manager
)
type SessionID struct {
ID string
}
func RegisterHandler(name string, register HandlerRegister) {
mu.Lock()
defer mu.Unlock()
sessionHandlerRegisters[name] = register
}
func GetHandler(name string) (session.Handler, error) {
mu.RLock()
if handler, ok := sessionHandlers[name]; ok {
mu.RUnlock()
return handler, nil
}
register, ok := sessionHandlerRegisters[name]
mu.RUnlock()
if !ok {
return nil, fmt.Errorf("[session] handler (%s) is not registered", name)
}
handler, err := register()
if err != nil {
return nil, err
}
sessionHandlers[name] = handler
return handler, nil
}
type Config struct {
Default string `yaml:"default" env:"SESSION_HANDLER" default:"file"`
Dir string `yaml:"dir" default:"sessions"`
MaxLifeTime int `yaml:"max_life_time" default:"600"`
CacheStore string `yaml:"cache_store" default:"session"`
CookieName string `yaml:"cookie_name" default:"enorith-session" env:"COOKIE_NAME"`
Domain string `yaml:"domain" default:""`
Path string `yaml:"path" default:"/"`
Secure bool `yaml:"secure" default:"false"`
HttpOnly bool `yaml:"http_only" default:"true"`
SameSite string `yaml:"same_site" default:"lax"`
Encrypted bool `yaml:"encrypted" default:"false"`
}
type Service struct {
config Config
storagePath string
sameSite http.SameSite
}
//Register service when app starting, before http server start
// you can configure service, prepare global vars etc.
// running at main goroutine
func (s *Service) Register(app *framework.App) error {
app.Configure("session", &s.config)
if s.config.SameSite != "" {
switch s.config.SameSite {
case "default":
s.sameSite = http.SameSiteDefaultMode
case "lax":
s.sameSite = http.SameSiteLaxMode
case "strict":
s.sameSite = http.SameSiteStrictMode
case "none":
s.sameSite = http.SameSiteNoneMode
default:
s.sameSite = http.SameSiteDefaultMode
}
}
s.registerFileHandler()
err := s.registerCacheHandler()
if err != nil {
return err
}
handler, err := GetHandler(s.config.Default)
if err != nil {
return err
}
Manager = session.NewManager(handler)
app.Daemon(func(exit chan struct{}) {
log.Println("[session] gc started")
for {
select {
case <-exit:
return
case <-time.After(time.Second * 3):
Manager.GC(time.Duration(s.config.MaxLifeTime) * time.Second)
}
}
})
return nil
}
func (s *Service) registerFileHandler() {
RegisterHandler("file", func() (session.Handler, error) {
return handlers.NewFileSessionHandler(filepath.Join(s.storagePath, s.config.Dir)), nil
})
}
func (s *Service) registerCacheHandler() error {
RegisterHandler("cache", func() (session.Handler, error) {
if s.config.CacheStore == "" {
return nil, errors.New("[session] cache store is not configured")
}
if cache.Default == nil {
return nil, errors.New("[session] cache service is not configured")
}
repo, ok := cache.Default.GetRepository(s.config.CacheStore)
if !ok {
return nil, fmt.Errorf("[session] cache store (%s) is not found", s.config.CacheStore)
}
return handlers.NewCacheHandler(repo, time.Duration(s.config.MaxLifeTime)*time.Second), nil
})
return nil
}
//Lifetime container callback
// usually register request lifetime instance to IoC-Container (per-request unique)
// this function will run before every request handling
func (s *Service) Lifetime(ioc container.Interface, request contracts.RequestContract) {
var id string
if rc, ok := request.(contracts.WithRequestCookies); ok {
cb := rc.CookieByte(s.config.CookieName)
if len(cb) > 0 {
id = string(cb)
} else {
id = str.RandString(64)
}
} else {
id = str.RandString(64)
}
ioc.Bind(SessionID{}, SessionID{ID: id}, true)
ioc.BindFunc(&session.Session{}, func(c container.Interface) (interface{}, error) {
return Manager.Get(id), nil
}, true)
ioc.BindFunc("middleware.session", func(c container.Interface) (interface{}, error) {
return Middleware{
manager: Manager,
id: id,
cookieName: s.config.CookieName,
maxLifeTime: int(s.config.MaxLifeTime),
domain: s.config.Domain,
path: s.config.Path,
secure: s.config.Secure,
httpOnly: s.config.HttpOnly,
sameSite: s.sameSite,
}, nil
}, true)
ioc.WithInjector(NewSessionInjector(id))
}
func NewService(storagePath string) *Service {
return &Service{storagePath: storagePath, sameSite: http.SameSiteDefaultMode}
}