A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
// Copyright 2020 The Gitea Authors. All rights reserved.
//
// 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 (
"fmt"
"sync"
"time"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/nosql"
"gitea.com/go-chi/session"
"github.com/go-redis/redis/v8"
)
// RedisStore represents a redis session store implementation.
type RedisStore struct {
c redis.UniversalClient
prefix, sid string
duration time.Duration
lock sync.RWMutex
data map[interface{}]interface{}
}
// NewRedisStore creates and returns a redis session store.
func NewRedisStore(c redis.UniversalClient, prefix, sid string, dur time.Duration, kv map[interface{}]interface{}) *RedisStore {
return &RedisStore{
c: c,
prefix: prefix,
sid: sid,
duration: dur,
data: kv,
}
}
// Set sets value to given key in session.
func (s *RedisStore) 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 *RedisStore) Get(key interface{}) interface{} {
s.lock.RLock()
defer s.lock.RUnlock()
return s.data[key]
}
// Delete delete a key from session.
func (s *RedisStore) Delete(key interface{}) error {
s.lock.Lock()
defer s.lock.Unlock()
delete(s.data, key)
return nil
}
// ID returns current session ID.
func (s *RedisStore) ID() string {
return s.sid
}
// Release releases resource and save data to provider.
func (s *RedisStore) Release() error {
// Skip encoding if the data is empty
if len(s.data) == 0 {
return nil
}
data, err := session.EncodeGob(s.data)
if err != nil {
return err
}
return s.c.Set(graceful.GetManager().HammerContext(), s.prefix+s.sid, string(data), s.duration).Err()
}
// Flush deletes all session data.
func (s *RedisStore) Flush() error {
s.lock.Lock()
defer s.lock.Unlock()
s.data = make(map[interface{}]interface{})
return nil
}
// RedisProvider represents a redis session provider implementation.
type RedisProvider struct {
c redis.UniversalClient
duration time.Duration
prefix string
}
// Init initializes redis session provider.
// configs: network=tcp,addr=:6379,password=macaron,db=0,pool_size=100,idle_timeout=180,prefix=session;
func (p *RedisProvider) Init(maxlifetime int64, configs string) (err error) {
p.duration, err = time.ParseDuration(fmt.Sprintf("%ds", maxlifetime))
if err != nil {
return err
}
uri := nosql.ToRedisURI(configs)
for k, v := range uri.Query() {
switch k {
case "prefix":
p.prefix = v[0]
}
}
p.c = nosql.GetManager().GetRedisClient(uri.String())
return p.c.Ping(graceful.GetManager().ShutdownContext()).Err()
}
// Read returns raw session store by session ID.
func (p *RedisProvider) Read(sid string) (session.RawStore, error) {
psid := p.prefix + sid
if !p.Exist(sid) {
if err := p.c.Set(graceful.GetManager().HammerContext(), psid, "", p.duration).Err(); err != nil {
return nil, err
}
}
var kv map[interface{}]interface{}
kvs, err := p.c.Get(graceful.GetManager().HammerContext(), psid).Result()
if err != nil {
return nil, err
}
if len(kvs) == 0 {
kv = make(map[interface{}]interface{})
} else {
kv, err = session.DecodeGob([]byte(kvs))
if err != nil {
return nil, err
}
}
return NewRedisStore(p.c, p.prefix, sid, p.duration, kv), nil
}
// Exist returns true if session with given ID exists.
func (p *RedisProvider) Exist(sid string) bool {
v, err := p.c.Exists(graceful.GetManager().HammerContext(), p.prefix+sid).Result()
return err == nil && v == 1
}
// Destroy deletes a session by session ID.
func (p *RedisProvider) Destroy(sid string) error {
return p.c.Del(graceful.GetManager().HammerContext(), p.prefix+sid).Err()
}
// Regenerate regenerates a session store from old session ID to new one.
func (p *RedisProvider) Regenerate(oldsid, sid string) (_ session.RawStore, err error) {
poldsid := p.prefix + oldsid
psid := p.prefix + sid
if p.Exist(sid) {
return nil, fmt.Errorf("new sid '%s' already exists", sid)
} else if !p.Exist(oldsid) {
// Make a fake old session.
if err = p.c.Set(graceful.GetManager().HammerContext(), poldsid, "", p.duration).Err(); err != nil {
return nil, err
}
}
if err = p.c.Rename(graceful.GetManager().HammerContext(), poldsid, psid).Err(); err != nil {
return nil, err
}
var kv map[interface{}]interface{}
kvs, err := p.c.Get(graceful.GetManager().HammerContext(), psid).Result()
if err != nil {
return nil, err
}
if len(kvs) == 0 {
kv = make(map[interface{}]interface{})
} else {
kv, err = session.DecodeGob([]byte(kvs))
if err != nil {
return nil, err
}
}
return NewRedisStore(p.c, p.prefix, sid, p.duration, kv), nil
}
// Count counts and returns number of sessions.
func (p *RedisProvider) Count() int {
size, err := p.c.DBSize(graceful.GetManager().HammerContext()).Result()
if err != nil {
return 0
}
return int(size)
}
// GC calls GC to clean expired sessions.
func (*RedisProvider) GC() {}
func init() {
session.Register("redis", &RedisProvider{})
}