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annotate auth/persistent.go @ 199:ddc7ef95c247

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Implemented Add of persistent sessions.
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 20 Jul 2018 23:06:53 +0200
parents e85413e5befa
children 8426a92fda00
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package auth
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2
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3 import (
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4 "bytes"
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5 "database/sql"
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6 "log"
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7 "time"
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8
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9 bolt "github.com/coreos/bbolt"
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10 )
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11
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12 type PersistentConnectionPool struct {
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13 db *bolt.DB
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14 conns map[string]*Connection
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15 cmds chan func(*PersistentConnectionPool)
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16 }
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17
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18 var sessionsBucket = []byte("sessions")
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19
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20 func NewPersistentConnectionPool(filename string) (*PersistentConnectionPool, error) {
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21
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22 db, err := bolt.Open(filename, 0600, nil)
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23 if err != nil {
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24 return nil, err
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25 }
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26
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27 conns := make(map[string]*Connection)
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28 err = db.Update(func(tx *bolt.Tx) error {
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29 b, err := tx.CreateBucketIfNotExists(sessionsBucket)
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30 if err != nil {
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31 return err
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32 }
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33
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34 // pre-load sessions
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35 c := b.Cursor()
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36
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37 for k, v := c.First(); k != nil; k, v = c.Next() {
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38 var conn Connection
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39 if err := conn.deserialize(bytes.NewReader(v)); err != nil {
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40 return err
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41 }
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42 conns[string(k)] = &conn
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43 }
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44
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45 return nil
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46 })
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47
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48 if err != nil {
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49 db.Close()
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50 return nil, err
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51 }
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52
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53 pcp := &PersistentConnectionPool{
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54 db: db,
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55 conns: conns,
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56 cmds: make(chan func(*PersistentConnectionPool)),
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57 }
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58 go pcp.run()
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59 return pcp, nil
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60 }
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61
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62 func (pcp *PersistentConnectionPool) run() {
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63 for {
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64 select {
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65 case cmd := <-pcp.cmds:
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66 cmd(pcp)
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67 case <-time.After(time.Minute):
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68 pcp.cleanDB()
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69 case <-time.After(time.Minute * 5):
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70 pcp.cleanToken()
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71 }
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72 }
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73 }
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74
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75 func (pcp *PersistentConnectionPool) cleanDB() {
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76 log.Println("cleanDB: Not implemented, yet.")
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77 }
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78
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79 func (pcp *PersistentConnectionPool) cleanToken() {
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80 log.Println("cleanToken: Not implemented, yet.")
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81 }
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82
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83 func (pcp *PersistentConnectionPool) Delete(token string) bool {
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84 res := make(chan bool)
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85 pcp.cmds <- func(pcp *PersistentConnectionPool) {
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86 conn, found := pcp.conns[token]
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87 if !found {
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88 res <- false
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89 return
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90 }
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91 conn.close()
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92 delete(pcp.conns, token)
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93 err := pcp.db.Update(func(tx *bolt.Tx) error {
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94 b := tx.Bucket(sessionsBucket)
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95 return b.Delete([]byte(token))
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96 })
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97 if err != nil {
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98 log.Printf("error: %v\n", err)
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99 }
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100 res <- true
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101 }
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102 return <-res
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103 }
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104
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105 func (pcp *PersistentConnectionPool) Add(token string, session *Session) *Connection {
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106 res := make(chan *Connection)
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107
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108 pcp.cmds <- func(cp *PersistentConnectionPool) {
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109 con := pcp.conns[token]
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110 if con == nil {
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111 con = &Connection{}
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112 pcp.conns[token] = con
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113 }
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114 con.set(session)
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115 err := pcp.db.Update(func(tx *bolt.Tx) error {
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116 b := tx.Bucket(sessionsBucket)
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117 var buf bytes.Buffer
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118 if err := con.serialize(&buf); err != nil {
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119 return err
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120 }
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121 return b.Put([]byte(token), buf.Bytes())
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122 })
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123 if err != nil {
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124 log.Printf("error: %v\n", err)
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125 }
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126 res <- con
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127 }
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128
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129 con := <-res
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130 return con
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131 }
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132
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133 func (pcp *PersistentConnectionPool) Renew(token string) (string, error) {
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134 log.Println("Renew: Not implemented, yet.")
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135 return "", nil
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136 }
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137
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138 func (pcp *PersistentConnectionPool) Do(token string, fn func(*sql.DB) error) error {
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139 log.Println("Do: Not implemented, yet.")
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140 return nil
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141 }
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142
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143 func (pcp *PersistentConnectionPool) Session(token string) *Session {
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144 log.Println("Session: Not implemented, yet.")
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145 return nil
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146 }
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147
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148 func (pcp *PersistentConnectionPool) Shutdown() error {
193
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149 log.Println("info: shutdown persistent connection pool.")
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150 if db := pcp.db; db != nil {
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151 pcp.db = nil
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152 return db.Close()
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153 }
190
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154 return nil
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155 }