98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package oauth2
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import (
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"encoding/gob"
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"fmt"
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"net/http"
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"code.gitea.io/gitea/modules/log"
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chiSession "gitea.com/go-chi/session"
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"github.com/gorilla/sessions"
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)
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// SessionsStore creates a gothic store from our session
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type SessionsStore struct {
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maxLength int64
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}
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// Get should return a cached session.
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func (st *SessionsStore) Get(r *http.Request, name string) (*sessions.Session, error) {
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return st.getOrNew(r, name, false)
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}
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// New should create and return a new session.
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//
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// Note that New should never return a nil session, even in the case of
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// an error if using the Registry infrastructure to cache the session.
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func (st *SessionsStore) New(r *http.Request, name string) (*sessions.Session, error) {
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return st.getOrNew(r, name, true)
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}
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// getOrNew gets the session from the chi-session if it exists. Override permits the overriding of an unexpected object.
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func (st *SessionsStore) getOrNew(r *http.Request, name string, override bool) (*sessions.Session, error) {
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chiStore := chiSession.GetSession(r)
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session := sessions.NewSession(st, name)
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rawData := chiStore.Get(name)
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if rawData != nil {
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oldSession, ok := rawData.(*sessions.Session)
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if ok {
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session.ID = oldSession.ID
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session.IsNew = oldSession.IsNew
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session.Options = oldSession.Options
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session.Values = oldSession.Values
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return session, nil
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} else if !override {
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log.Error("Unexpected object in session at name: %s: %v", name, rawData)
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return nil, fmt.Errorf("unexpected object in session at name: %s", name)
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}
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}
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session.IsNew = override
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session.ID = chiStore.ID() // Simply copy the session id from the chi store
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return session, chiStore.Set(name, session)
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}
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// Save should persist session to the underlying store implementation.
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func (st *SessionsStore) Save(r *http.Request, w http.ResponseWriter, session *sessions.Session) error {
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chiStore := chiSession.GetSession(r)
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if session.IsNew {
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_, _ = chiSession.RegenerateSession(w, r)
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session.IsNew = false
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}
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if err := chiStore.Set(session.Name(), session); err != nil {
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return err
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}
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if st.maxLength > 0 {
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sizeWriter := &sizeWriter{}
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_ = gob.NewEncoder(sizeWriter).Encode(session)
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if sizeWriter.size > st.maxLength {
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return fmt.Errorf("encode session: Data too long: %d > %d", sizeWriter.size, st.maxLength)
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}
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}
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return chiStore.Release()
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}
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type sizeWriter struct {
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size int64
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}
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func (s *sizeWriter) Write(data []byte) (int, error) {
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s.size += int64(len(data))
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return len(data), nil
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}
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var _ (sessions.Store) = &SessionsStore{}
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