When reading expired sessions - expire them (#12686) (#12690)

* When reading expired sessions - expire them

Update to latest macaron/session following merge of
https://gitea.com/macaron/session/pulls/11

Also remove old memory provider as 11 updates the memory provider to
make it unnecessary.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* and macaron/session/pulls/12

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: zeripath <art27@cantab.net>

go.mod

 	gitea.com/macaron/i18n v0.0.0-20190822004228-474e714e2223
 	gitea.com/macaron/inject v0.0.0-20190805023432-d4c86e31027a
 	gitea.com/macaron/macaron v1.4.0
-	gitea.com/macaron/session v0.0.0-20191207215012-613cebf0674d
+	gitea.com/macaron/session v0.0.0-20200902202411-e3a87877db6e
 	gitea.com/macaron/toolbox v0.0.0-20190822013122-05ff0fc766b7
 	github.com/BurntSushi/toml v0.3.1
 	github.com/PuerkitoBio/goquery v1.5.0

go.sum

 gitea.com/macaron/macaron v1.4.0/go.mod h1:P7hfDbQjcW22lkYkXlxdRIfWOXxH2+K4EogN4Q0UlLY=
 gitea.com/macaron/session v0.0.0-20190821211443-122c47c5f705 h1:mvkQGAlON1Z6Y8pqa/+FpYIskk54mazuECUfZK5oTg0=
 gitea.com/macaron/session v0.0.0-20190821211443-122c47c5f705/go.mod h1:1ujH0jD6Ca4iK9NL0Q2a7fG2chvXx5hVa7hBfABwpkA=
-gitea.com/macaron/session v0.0.0-20191207215012-613cebf0674d h1:XLww3CvnFZkXVwauN67fniDaIpIqsE+9KVcxlZKlvLU=
-gitea.com/macaron/session v0.0.0-20191207215012-613cebf0674d/go.mod h1:FanKy3WjWb5iw/iZBPk4ggoQT9FcM6bkBPvmDmsH6tY=
+gitea.com/macaron/session v0.0.0-20200902202411-e3a87877db6e h1:BHoJ/xWNt6FrVsL54JennM9HPIQlnbmRvmaC5DO65pU=
+gitea.com/macaron/session v0.0.0-20200902202411-e3a87877db6e/go.mod h1:FanKy3WjWb5iw/iZBPk4ggoQT9FcM6bkBPvmDmsH6tY=
 gitea.com/macaron/toolbox v0.0.0-20190822013122-05ff0fc766b7 h1:N9QFoeNsUXLhl14mefLzGluqV7w2mGU3u+iZU+jCeWk=
 gitea.com/macaron/toolbox v0.0.0-20190822013122-05ff0fc766b7/go.mod h1:kgsbFPPS4P+acDYDOPDa3N4IWWOuDJt5/INKRUz7aks=
 gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:lSA0F4e9A2NcQSqGqTOXqu2aRi/XEQxDCBwM8yJtE6s=

modules/session/memory.go

-// Copyright 2013 Beego Authors
-// Copyright 2014 The Macaron Authors
-// Copyright 2019 The Gitea Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License"): you may
-// not use this file except in compliance with the License. You may obtain
-// a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-// License for the specific language governing permissions and limitations
-// under the License.
-
-package session
-
-import (
-	"container/list"
-	"fmt"
-	"sync"
-	"time"
-
-	"gitea.com/macaron/session"
-)
-
-// MemStore represents a in-memory session store implementation.
-type MemStore struct {
-	sid        string
-	lock       sync.RWMutex
-	data       map[interface{}]interface{}
-	lastAccess time.Time
-}
-
-// NewMemStore creates and returns a memory session store.
-func NewMemStore(sid string) *MemStore {
-	return &MemStore{
-		sid:        sid,
-		data:       make(map[interface{}]interface{}),
-		lastAccess: time.Now(),
-	}
-}
-
-// Set sets value to given key in session.
-func (s *MemStore) Set(key, val interface{}) error {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
-	s.data[key] = val
-	return nil
-}
-
-// Get gets value by given key in session.
-func (s *MemStore) Get(key interface{}) interface{} {
-	s.lock.RLock()
-	defer s.lock.RUnlock()
-
-	return s.data[key]
-}
-
-// Delete deletes a key from session.
-func (s *MemStore) Delete(key interface{}) error {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
-	delete(s.data, key)
-	return nil
-}
-
-// ID returns current session ID.
-func (s *MemStore) ID() string {
-	return s.sid
-}
-
-// Release releases resource and save data to provider.
-func (*MemStore) Release() error {
-	return nil
-}
-
-// Flush deletes all session data.
-func (s *MemStore) Flush() error {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
-	s.data = make(map[interface{}]interface{})
-	return nil
-}
-
-// MemProvider represents a in-memory session provider implementation.
-type MemProvider struct {
-	lock        sync.RWMutex
-	maxLifetime int64
-	data        map[string]*list.Element
-	// A priority list whose lastAccess newer gets higher priority.
-	list *list.List
-}
-
-// Init initializes memory session provider.
-func (p *MemProvider) Init(maxLifetime int64, _ string) error {
-	p.lock.Lock()
-	p.maxLifetime = maxLifetime
-	p.lock.Unlock()
-	return nil
-}
-
-// update expands time of session store by given ID.
-func (p *MemProvider) update(sid string) error {
-	p.lock.Lock()
-	defer p.lock.Unlock()
-
-	if e, ok := p.data[sid]; ok {
-		e.Value.(*MemStore).lastAccess = time.Now()
-		p.list.MoveToFront(e)
-		return nil
-	}
-	return nil
-}
-
-// Read returns raw session store by session ID.
-func (p *MemProvider) Read(sid string) (_ session.RawStore, err error) {
-	p.lock.RLock()
-	e, ok := p.data[sid]
-	p.lock.RUnlock()
-
-	if ok {
-		if err = p.update(sid); err != nil {
-			return nil, err
-		}
-		return e.Value.(*MemStore), nil
-	}
-
-	// Create a new session.
-	p.lock.Lock()
-	defer p.lock.Unlock()
-
-	s := NewMemStore(sid)
-	p.data[sid] = p.list.PushBack(s)
-	return s, nil
-}
-
-// Exist returns true if session with given ID exists.
-func (p *MemProvider) Exist(sid string) bool {
-	p.lock.RLock()
-	defer p.lock.RUnlock()
-
-	_, ok := p.data[sid]
-	return ok
-}
-
-// Destroy deletes a session by session ID.
-func (p *MemProvider) Destroy(sid string) error {
-	p.lock.Lock()
-	defer p.lock.Unlock()
-
-	e, ok := p.data[sid]
-	if !ok {
-		return nil
-	}
-
-	p.list.Remove(e)
-	delete(p.data, sid)
-	return nil
-}
-
-// Regenerate regenerates a session store from old session ID to new one.
-func (p *MemProvider) Regenerate(oldsid, sid string) (session.RawStore, error) {
-	if p.Exist(sid) {
-		return nil, fmt.Errorf("new sid '%s' already exists", sid)
-	}
-
-	s, err := p.Read(oldsid)
-	if err != nil {
-		return nil, err
-	}
-
-	if err = p.Destroy(oldsid); err != nil {
-		return nil, err
-	}
-
-	s.(*MemStore).sid = sid
-
-	p.lock.Lock()
-	defer p.lock.Unlock()
-	p.data[sid] = p.list.PushBack(s)
-	return s, nil
-}
-
-// Count counts and returns number of sessions.
-func (p *MemProvider) Count() int {
-	return p.list.Len()
-}
-
-// GC calls GC to clean expired sessions.
-func (p *MemProvider) GC() {
-	p.lock.RLock()
-	for {
-		// No session in the list.
-		e := p.list.Back()
-		if e == nil {
-			break
-		}
-
-		if (e.Value.(*MemStore).lastAccess.Unix() + p.maxLifetime) < time.Now().Unix() {
-			p.lock.RUnlock()
-			p.lock.Lock()
-			p.list.Remove(e)
-			delete(p.data, e.Value.(*MemStore).sid)
-			p.lock.Unlock()
-			p.lock.RLock()
-		} else {
-			break
-		}
-	}
-	p.lock.RUnlock()
-}

modules/session/virtual.go

 package session
 
 import (
-	"container/list"
 	"encoding/json"
 	"fmt"
 	"sync"
 	// This is only slightly more wrong than modules/setting/session.go:23
 	switch opts.Provider {
 	case "memory":
-		o.provider = &MemProvider{list: list.New(), data: make(map[string]*list.Element)}
+		o.provider = &session.MemProvider{}
 	case "file":
 		o.provider = &session.FileProvider{}
 	case "redis":

vendor/gitea.com/macaron/session/file.go

 	defer p.lock.RUnlock()
 
 	var f *os.File
+	ok := false
 	if com.IsFile(filename) {
+		modTime, err := com.FileMTime(filename)
+		if err != nil {
+			return nil, err
+		}
+		ok = (modTime + p.maxlifetime) >= time.Now().Unix()
+	}
+	if ok {
 		f, err = os.OpenFile(filename, os.O_RDONLY, 0600)
 	} else {
 		f, err = os.Create(filename)

vendor/gitea.com/macaron/session/memory.go

 // Init initializes memory session provider.
 func (p *MemProvider) Init(maxLifetime int64, _ string) error {
 	p.lock.Lock()
+	p.list = list.New()
+	p.data = make(map[string]*list.Element)
 	p.maxLifetime = maxLifetime
 	p.lock.Unlock()
 	return nil
 	e, ok := p.data[sid]
 	p.lock.RUnlock()
 
-	if ok {
+	// Only restore if the session is still alive.
+	if ok && (e.Value.(*MemStore).lastAccess.Unix()+p.maxLifetime) >= time.Now().Unix() {
 		if err = p.update(sid); err != nil {
 			return nil, err
 		}
 	// Create a new session.
 	p.lock.Lock()
 	defer p.lock.Unlock()
-
+	if ok {
+		p.list.Remove(e)
+		delete(p.data, sid)
+	}
 	s := NewMemStore(sid)
 	p.data[sid] = p.list.PushBack(s)
 	return s, nil
 }
 
 func init() {
-	Register("memory", &MemProvider{list: list.New(), data: make(map[string]*list.Element)})
+	Register("memory", &MemProvider{})
 }

vendor/gitea.com/macaron/session/mysql/mysql.go

 
 // Read returns raw session store by session ID.
 func (p *MysqlProvider) Read(sid string) (session.RawStore, error) {
+	now := time.Now().Unix()
 	var data []byte
-	err := p.c.QueryRow("SELECT data FROM session WHERE `key`=?", sid).Scan(&data)
+	expiry := now
+	err := p.c.QueryRow("SELECT data, expiry FROM session WHERE `key`=?", sid).Scan(&data, &expiry)
 	if err == sql.ErrNoRows {
 		_, err = p.c.Exec("INSERT INTO session(`key`,data,expiry) VALUES(?,?,?)",
-			sid, "", time.Now().Unix())
+			sid, "", now)
 	}
 	if err != nil {
 		return nil, err
 	}
 
 	var kv map[interface{}]interface{}
-	if len(data) == 0 {
+	if len(data) == 0 || expiry+p.expire <= now {
 		kv = make(map[interface{}]interface{})
 	} else {
 		kv, err = session.DecodeGob(data)

vendor/gitea.com/macaron/session/postgres/postgres.go

 
 // Read returns raw session store by session ID.
 func (p *PostgresProvider) Read(sid string) (session.RawStore, error) {
+	now := time.Now().Unix()
 	var data []byte
-	err := p.c.QueryRow("SELECT data FROM session WHERE key=$1", sid).Scan(&data)
+	expiry := now
+	err := p.c.QueryRow("SELECT data, expiry FROM session WHERE key=$1", sid).Scan(&data, &expiry)
 	if err == sql.ErrNoRows {
 		_, err = p.c.Exec("INSERT INTO session(key,data,expiry) VALUES($1,$2,$3)",
-			sid, "", time.Now().Unix())
+			sid, "", now)
 	}
 	if err != nil {
 		return nil, err
 	}
 
 	var kv map[interface{}]interface{}
-	if len(data) == 0 {
+	if len(data) == 0 || expiry+p.maxlifetime <= now {
 		kv = make(map[interface{}]interface{})
 	} else {
 		kv, err = session.DecodeGob(data)

vendor/modules.txt

 # gitea.com/macaron/macaron v1.4.0
 ## explicit
 gitea.com/macaron/macaron
-# gitea.com/macaron/session v0.0.0-20191207215012-613cebf0674d
+# gitea.com/macaron/session v0.0.0-20200902202411-e3a87877db6e
 ## explicit
 gitea.com/macaron/session
 gitea.com/macaron/session/couchbase