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package session
import (
"context"
"errors"
"net/http"
"sync"
"go.neonxp.ru/mux"
"go.neonxp.ru/mux/middleware"
"go.neonxp.ru/objectid"
)
type Config struct {
SessionCookie string
Path string
Domain string
Secure bool
HttpOnly bool
MaxAge int
}
var DefaultConfig Config = Config{
SessionCookie: "_session",
Path: "/",
Domain: "",
Secure: false,
HttpOnly: true,
MaxAge: 30 * 3600,
}
func Middleware(config Config, storer Store) mux.Middleware {
if storer == nil {
storer = &MemoryStore{store: sync.Map{}}
}
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var (
sessionID string
values Value
)
cookie, err := r.Cookie(config.SessionCookie)
switch {
case err == nil:
sessionID = cookie.Value
values = storer.Load(r.Context(), sessionID)
case errors.Is(err, http.ErrNoCookie):
sessionID = objectid.New().String()
values = Value{}
}
http.SetCookie(w, &http.Cookie{
Name: config.SessionCookie,
Value: sessionID,
Path: config.Path,
Domain: config.Domain,
Secure: config.Secure,
HttpOnly: config.HttpOnly,
MaxAge: config.MaxAge,
})
ctx := context.WithValue(r.Context(), middleware.SessionValueKey, &values)
ctx = context.WithValue(ctx, middleware.SessionIDKey, sessionID)
ctx = context.WithValue(ctx, middleware.SessionConfigKey, config)
ctx = context.WithValue(ctx, middleware.SessionStorerKey, storer)
h.ServeHTTP(w, r.WithContext(ctx))
storer.Save(r.Context(), sessionID, values)
})
}
}
func FromRequest(r *http.Request) *Value {
return r.Context().Value(middleware.SessionValueKey).(*Value)
}
func Clear(w http.ResponseWriter, r *http.Request) {
storer := r.Context().Value(middleware.SessionStorerKey).(Store)
sessionID := r.Context().Value(middleware.SessionIDKey).(string)
storer.Remove(r.Context(), sessionID)
config := r.Context().Value(middleware.SessionConfigKey).(Config)
http.SetCookie(w, &http.Cookie{
Name: config.SessionCookie,
Value: sessionID,
Path: config.Path,
Domain: config.Domain,
Secure: config.Secure,
HttpOnly: config.HttpOnly,
MaxAge: -1,
})
}
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