/usr/share/gocode/src/github.com/go-macaron/session/postgres/postgres.go is in golang-github-go-macaron-session-dev 0.0~git20151014.0.66031fc-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | // Copyright 2013 Beego Authors
// Copyright 2014 The Macaron 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 (
"database/sql"
"fmt"
"log"
"sync"
"time"
_ "github.com/lib/pq"
"github.com/go-macaron/session"
)
// PostgresStore represents a postgres session store implementation.
type PostgresStore struct {
c *sql.DB
sid string
lock sync.RWMutex
data map[interface{}]interface{}
}
// NewPostgresStore creates and returns a postgres session store.
func NewPostgresStore(c *sql.DB, sid string, kv map[interface{}]interface{}) *PostgresStore {
return &PostgresStore{
c: c,
sid: sid,
data: kv,
}
}
// Set sets value to given key in session.
func (s *PostgresStore) Set(key, value interface{}) error {
s.lock.Lock()
defer s.lock.Unlock()
s.data[key] = value
return nil
}
// Get gets value by given key in session.
func (s *PostgresStore) Get(key interface{}) interface{} {
s.lock.RLock()
defer s.lock.RUnlock()
return s.data[key]
}
// Delete delete a key from session.
func (s *PostgresStore) Delete(key interface{}) error {
s.lock.Lock()
defer s.lock.Unlock()
delete(s.data, key)
return nil
}
// ID returns current session ID.
func (s *PostgresStore) ID() string {
return s.sid
}
// save postgres session values to database.
// must call this method to save values to database.
func (s *PostgresStore) Release() error {
data, err := session.EncodeGob(s.data)
if err != nil {
return err
}
_, err = s.c.Exec("UPDATE session SET data=$1, expiry=$2 WHERE key=$3",
data, time.Now().Unix(), s.sid)
return err
}
// Flush deletes all session data.
func (s *PostgresStore) Flush() error {
s.lock.Lock()
defer s.lock.Unlock()
s.data = make(map[interface{}]interface{})
return nil
}
// PostgresProvider represents a postgres session provider implementation.
type PostgresProvider struct {
c *sql.DB
maxlifetime int64
}
// Init initializes postgres session provider.
// connStr: user=a password=b host=localhost port=5432 dbname=c sslmode=disable
func (p *PostgresProvider) Init(maxlifetime int64, connStr string) (err error) {
p.maxlifetime = maxlifetime
p.c, err = sql.Open("postgres", connStr)
if err != nil {
return err
}
return p.c.Ping()
}
// Read returns raw session store by session ID.
func (p *PostgresProvider) Read(sid string) (session.RawStore, error) {
var data []byte
err := p.c.QueryRow("SELECT data FROM session WHERE key=$1", sid).Scan(&data)
if err == sql.ErrNoRows {
_, err = p.c.Exec("INSERT INTO session(key,data,expiry) VALUES($1,$2,$3)",
sid, "", time.Now().Unix())
}
if err != nil {
return nil, err
}
var kv map[interface{}]interface{}
if len(data) == 0 {
kv = make(map[interface{}]interface{})
} else {
kv, err = session.DecodeGob(data)
if err != nil {
return nil, err
}
}
return NewPostgresStore(p.c, sid, kv), nil
}
// Exist returns true if session with given ID exists.
func (p *PostgresProvider) Exist(sid string) bool {
var data []byte
err := p.c.QueryRow("SELECT data FROM session WHERE key=$1", sid).Scan(&data)
if err != nil && err != sql.ErrNoRows {
panic("session/postgres: error checking existence: " + err.Error())
}
return err != sql.ErrNoRows
}
// Destory deletes a session by session ID.
func (p *PostgresProvider) Destory(sid string) error {
_, err := p.c.Exec("DELETE FROM session WHERE key=$1", sid)
return err
}
// Regenerate regenerates a session store from old session ID to new one.
func (p *PostgresProvider) Regenerate(oldsid, sid string) (_ session.RawStore, err error) {
if p.Exist(sid) {
return nil, fmt.Errorf("new sid '%s' already exists", sid)
}
if !p.Exist(oldsid) {
if _, err = p.c.Exec("INSERT INTO session(key,data,expiry) VALUES($1,$2,$3)",
oldsid, "", time.Now().Unix()); err != nil {
return nil, err
}
}
if _, err = p.c.Exec("UPDATE session SET key=$1 WHERE key=$2", sid, oldsid); err != nil {
return nil, err
}
return p.Read(sid)
}
// Count counts and returns number of sessions.
func (p *PostgresProvider) Count() (total int) {
if err := p.c.QueryRow("SELECT COUNT(*) AS NUM FROM session").Scan(&total); err != nil {
panic("session/postgres: error counting records: " + err.Error())
}
return total
}
// GC calls GC to clean expired sessions.
func (p *PostgresProvider) GC() {
if _, err := p.c.Exec("DELETE FROM session WHERE EXTRACT(EPOCH FROM NOW()) - expiry > $1", p.maxlifetime); err != nil {
log.Printf("session/postgres: error garbage collecting: %v", err)
}
}
func init() {
session.Register("postgres", &PostgresProvider{})
}
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