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package session
import (
"context"
"encoding/gob"
"log"
"net/http"
"os"
"github.com/gorilla/securecookie"
"github.com/gorilla/sessions"
)
type sessionContextKey struct{}
const (
sessionCookie = "sessionKeks"
dataKey = "data"
)
func init() {
gob.Register(sessionData{})
}
type Session struct {
*sessionData
s *sessions.Session
}
type sessionData struct {
UserID int32
Authenticated bool
}
func (s *Session) Save(w http.ResponseWriter, r *http.Request) {
s.s.Values[dataKey] = *s.sessionData
if err := s.s.Save(r, w); err != nil {
log.Panic("Storing session: ", err)
}
}
func (s *Session) MaxAge(maxAge int) {
s.s.Options.MaxAge = maxAge
}
func (s *Session) Invalidate() {
s.MaxAge(-1)
s.Authenticated = false
}
func (s *Session) IsNew() bool {
return s.s.IsNew
}
// From extracts the `Session` from the `Request`.
func From(r *http.Request) Session {
s := r.Context().Value(sessionContextKey{}).(*sessions.Session)
s.Options.HttpOnly = true
sd, ok := s.Values[dataKey].(sessionData)
if !ok {
sd = sessionData{}
}
return Session{&sd, s}
}
func Handler() func(next http.Handler) http.Handler {
var key []byte
if envKey := os.Getenv("GOSTEN_SECRET"); len(envKey) >= 32 {
key = []byte(envKey)
} else {
key = securecookie.GenerateRandomKey(32)
}
sessionStore := sessions.NewCookieStore(key)
return func(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
session, _ := sessionStore.Get(r, sessionCookie)
ctx := context.WithValue(r.Context(), sessionContextKey{}, session)
next.ServeHTTP(w, r.WithContext(ctx))
}
return http.HandlerFunc(fn)
}
}
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