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|
package session
import (
"context"
"errors"
"net/http"
"time"
"go.neonxp.ru/mux"
"go.neonxp.ru/objectid"
)
type Config struct {
SessionCookie string
Path string
Domain string
Secure bool
HttpOnly bool
MaxAge time.Duration
}
var DefaultConfig Config = Config{
SessionCookie: "_session",
Path: "/",
Domain: "",
Secure: false,
HttpOnly: true,
MaxAge: 365 * 24 * time.Hour,
}
var (
ErrSessionNotFound = errors.New("session not found")
ErrNoSessionInContext = errors.New("no session in context")
)
type SessionManager struct {
config *Config
storer Store
}
func New(storer Store) *SessionManager {
return NewWithConfig(&DefaultConfig, storer)
}
func NewWithConfig(config *Config, storer Store) *SessionManager {
return &SessionManager{
config: config,
storer: storer,
}
}
func (s *SessionManager) Middleware() mux.Middleware {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var (
sessionID string
values Values
)
cookie, err := r.Cookie(s.config.SessionCookie)
switch {
case err == nil:
sessionID = cookie.Value
values = s.storer.Load(sessionID)
case errors.Is(err, http.ErrNoCookie):
sessionID = objectid.New().String()
}
ctx := context.WithValue(r.Context(), sessionManagerKey, s)
ctx = context.WithValue(ctx, sessionIDKey, sessionID)
ctx = context.WithValue(ctx, sessionValueKey, values)
h.ServeHTTP(w, r.WithContext(ctx))
})
}
}
func (s *SessionManager) Values(ctx context.Context) Values {
aValue := ctx.Value(sessionValueKey)
values, ok := aValue.(Values)
if !ok || values == nil {
values = Values{}
}
return values
}
func (s *SessionManager) Save(w http.ResponseWriter, r *http.Request, values Values) error {
aSessionID := r.Context().Value(sessionIDKey)
sessionID, ok := aSessionID.(string)
if !ok {
return ErrNoSessionInContext
}
http.SetCookie(w, &http.Cookie{
Name: s.config.SessionCookie,
Value: sessionID,
Path: s.config.Path,
Domain: s.config.Domain,
Secure: s.config.Secure,
HttpOnly: s.config.HttpOnly,
MaxAge: int(s.config.MaxAge.Seconds()),
})
return s.storer.Save(sessionID, values)
}
func (s *SessionManager) Clear(w http.ResponseWriter, r *http.Request) error {
aSessionID := r.Context().Value(sessionIDKey)
sessionID, ok := aSessionID.(string)
if !ok {
return ErrNoSessionInContext
}
http.SetCookie(w, &http.Cookie{
Name: s.config.SessionCookie,
Value: sessionID,
Path: s.config.Path,
Domain: s.config.Domain,
Secure: s.config.Secure,
HttpOnly: s.config.HttpOnly,
MaxAge: -1,
})
return s.storer.Remove(sessionID)
}
func FromRequest(r *http.Request) *SessionManager {
return r.Context().Value(sessionManagerKey).(*SessionManager)
}
|
