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/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package router
import (
"context"
"errors"
"fmt"
"net/http"
"net/url"
"github.com/gin-contrib/sessions"
"github.com/gin-contrib/sessions/memstore"
"github.com/gin-gonic/gin"
"github.com/spf13/viper"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
)
// sessionOptions returns the standard set of options to use for each session.
func sessionOptions() sessions.Options {
return sessions.Options{
Path: "/",
Domain: viper.GetString(config.Keys.Host),
MaxAge: 120, // 2 minutes
Secure: true, // only use cookie over https
HttpOnly: true, // exclude javascript from inspecting cookie
SameSite: http.SameSiteDefaultMode, // https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-cookie-same-site-00#section-4.1.1
}
}
// SessionName is a utility function that derives an appropriate session name from the hostname.
func SessionName() (string, error) {
// parse the protocol + host
protocol := viper.GetString(config.Keys.Protocol)
host := viper.GetString(config.Keys.Host)
u, err := url.Parse(fmt.Sprintf("%s://%s", protocol, host))
if err != nil {
return "", err
}
// take the hostname without any port attached
strippedHostname := u.Hostname()
if strippedHostname == "" {
return "", fmt.Errorf("could not derive hostname without port from %s://%s", protocol, host)
}
return fmt.Sprintf("gotosocial-%s", strippedHostname), nil
}
func useSession(ctx context.Context, sessionDB db.Session, engine *gin.Engine) error {
// check if we have a saved router session already
rs, err := sessionDB.GetSession(ctx)
if err != nil {
return fmt.Errorf("error using session: %s", err)
}
if rs == nil || rs.Auth == nil || rs.Crypt == nil {
return errors.New("router session was nil")
}
store := memstore.NewStore(rs.Auth, rs.Crypt)
store.Options(sessionOptions())
sessionName, err := SessionName()
if err != nil {
return err
}
engine.Use(sessions.Sessions(sessionName, store))
return nil
}
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