Mercurial > gemma

annotate pkg/auth/pool.go @ 486:b2dc9c2f69e0 metamorph-for-all

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First stab to use the metamorphic db to do all database stuff.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 24 Aug 2018 13:56:06 +0200
parents c1047fd04a3a
children 8a0737aa6ab6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 "log"
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6 "time"
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7
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8 bolt "github.com/coreos/bbolt"
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9 )
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10
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11 // ConnPool is the global connection pool.
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12 var ConnPool *ConnectionPool
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13
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14 type ConnectionPool struct {
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15 storage *bolt.DB
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16 conns map[string]*Connection
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17 cmds chan func(*ConnectionPool)
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18 }
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19
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20 var sessionsBucket = []byte("sessions")
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21
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22 func NewConnectionPool(filename string) (*ConnectionPool, error) {
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23
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24 pcp := &ConnectionPool{
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25 conns: make(map[string]*Connection),
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26 cmds: make(chan func(*ConnectionPool)),
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27 }
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28 if err := pcp.openStorage(filename); err != nil {
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29 return nil, err
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30 }
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31 go pcp.run()
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32 return pcp, nil
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33 }
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34
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35 // openStorage opens a storage file.
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36 func (pcp *ConnectionPool) openStorage(filename string) error {
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37
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38 // No file, nothing to restore/persist.
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39 if filename == "" {
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40 return nil
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41 }
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42
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43 db, err := bolt.Open(filename, 0600, nil)
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44 if err != nil {
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45 return err
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46 }
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47
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48 err = db.Update(func(tx *bolt.Tx) error {
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49 b, err := tx.CreateBucketIfNotExists(sessionsBucket)
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50 if err != nil {
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51 return err
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52 }
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53
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54 // pre-load sessions
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55 c := b.Cursor()
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56
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57 for k, v := c.First(); k != nil; k, v = c.Next() {
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58 var conn Connection
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59 if err := conn.deserialize(bytes.NewReader(v)); err != nil {
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60 return err
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61 }
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62 pcp.conns[string(k)] = &conn
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63 }
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64
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65 return nil
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66 })
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67
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68 if err != nil {
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69 db.Close()
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70 return err
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71 }
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72
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73 pcp.storage = db
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74 return nil
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75 }
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76
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77 func (pcp *ConnectionPool) run() {
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78 for {
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79 select {
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80 case cmd := <-pcp.cmds:
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81 cmd(pcp)
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82 case <-time.After(time.Minute):
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83 pcp.cleanDB()
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84 case <-time.After(time.Minute * 5):
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85 pcp.cleanToken()
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86 }
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87 }
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88 }
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89
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90 func (pcp *ConnectionPool) cleanDB() {
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91 }
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92
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93 func (pcp *ConnectionPool) cleanToken() {
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94 now := time.Now()
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95 for token, con := range pcp.conns {
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96 expires := time.Unix(con.session.ExpiresAt, 0)
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97 if expires.Before(now) {
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98 // TODO: Be more graceful here?
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99 con.close()
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100 delete(pcp.conns, token)
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101 pcp.remove(token)
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102 }
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103 }
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104 }
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105
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106 func (pcp *ConnectionPool) remove(token string) {
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107 if pcp.storage == nil {
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108 return
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109 }
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110 err := pcp.storage.Update(func(tx *bolt.Tx) error {
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111 b := tx.Bucket(sessionsBucket)
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112 return b.Delete([]byte(token))
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113 })
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114 if err != nil {
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115 log.Printf("error: %v\n", err)
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116 }
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117 }
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118
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119 func (pcp *ConnectionPool) Delete(token string) bool {
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120 res := make(chan bool)
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121 pcp.cmds <- func(pcp *ConnectionPool) {
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122 conn, found := pcp.conns[token]
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123 if !found {
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124 res <- false
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125 return
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126 }
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127 conn.close()
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128 delete(pcp.conns, token)
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129 pcp.remove(token)
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130 res <- true
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131 }
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132 return <-res
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133 }
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134
204
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diff changeset
135 func (pcp *ConnectionPool) store(token string, con *Connection) {
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diff changeset
136 if pcp.storage == nil {
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diff changeset
137 return
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diff changeset
138 }
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diff changeset
139 err := pcp.storage.Update(func(tx *bolt.Tx) error {
200
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
140 b := tx.Bucket(sessionsBucket)
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diff changeset
141 var buf bytes.Buffer
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diff changeset
142 if err := con.serialize(&buf); err != nil {
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diff changeset
143 return err
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diff changeset
144 }
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diff changeset
145 return b.Put([]byte(token), buf.Bytes())
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diff changeset
146 })
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diff changeset
147 if err != nil {
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diff changeset
148 log.Printf("error: %v\n", err)
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diff changeset
149 }
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diff changeset
150 }
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diff changeset
151
204
3d0988d9f867 De-virtualize the connection pool implementation.
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diff changeset
152 func (pcp *ConnectionPool) Add(token string, session *Session) *Connection {
199
ddc7ef95c247 Implemented Add of persistent sessions.
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diff changeset
153 res := make(chan *Connection)
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diff changeset
154
204
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diff changeset
155 pcp.cmds <- func(cp *ConnectionPool) {
199
ddc7ef95c247 Implemented Add of persistent sessions.
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parents: 197
diff changeset
156 con := pcp.conns[token]
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diff changeset
157 if con == nil {
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diff changeset
158 con = &Connection{}
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diff changeset
159 pcp.conns[token] = con
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diff changeset
160 }
ddc7ef95c247 Implemented Add of persistent sessions.
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diff changeset
161 con.set(session)
200
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
162 pcp.store(token, con)
199
ddc7ef95c247 Implemented Add of persistent sessions.
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diff changeset
163 res <- con
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diff changeset
164 }
ddc7ef95c247 Implemented Add of persistent sessions.
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diff changeset
165
ddc7ef95c247 Implemented Add of persistent sessions.
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parents: 197
diff changeset
166 con := <-res
ddc7ef95c247 Implemented Add of persistent sessions.
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diff changeset
167 return con
190
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168 }
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169
204
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diff changeset
170 func (pcp *ConnectionPool) Renew(token string) (string, error) {
200
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diff changeset
171
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diff changeset
172 type result struct {
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diff changeset
173 newToken string
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diff changeset
174 err error
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diff changeset
175 }
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diff changeset
176
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diff changeset
177 resCh := make(chan result)
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diff changeset
178
204
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diff changeset
179 pcp.cmds <- func(cp *ConnectionPool) {
200
8426a92fda00 Persistent session store: Implmented Renew.
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diff changeset
180 con := pcp.conns[token]
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diff changeset
181 if con == nil {
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diff changeset
182 resCh <- result{err: ErrNoSuchToken}
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diff changeset
183 } else {
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diff changeset
184 delete(pcp.conns, token)
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diff changeset
185 pcp.remove(token)
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diff changeset
186 newToken := GenerateSessionKey()
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diff changeset
187 // TODO: Ensure that this is not racy!
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diff changeset
188 con.session.ExpiresAt = time.Now().Add(maxTokenValid).Unix()
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diff changeset
189 pcp.conns[newToken] = con
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diff changeset
190 pcp.store(newToken, con)
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diff changeset
191 resCh <- result{newToken: newToken}
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diff changeset
192 }
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diff changeset
193 }
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diff changeset
194
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diff changeset
195 r := <-resCh
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diff changeset
196 return r.newToken, r.err
190
3457a60fb12d Added stub for a persistent session store.
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197 }
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198
486
b2dc9c2f69e0 First stab to use the metamorphic db to do all database stuff.
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diff changeset
199 func (pcp *ConnectionPool) Do(token string) (*Session, error) {
201
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
200
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
201 type result struct {
486
b2dc9c2f69e0 First stab to use the metamorphic db to do all database stuff.
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parents: 414
diff changeset
202 session *Session
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diff changeset
203 err error
201
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
204 }
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
205
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
206 res := make(chan result)
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parents: 200
diff changeset
207
204
3d0988d9f867 De-virtualize the connection pool implementation.
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diff changeset
208 pcp.cmds <- func(pcp *ConnectionPool) {
201
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
209 con := pcp.conns[token]
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parents: 200
diff changeset
210 if con == nil {
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parents: 200
diff changeset
211 res <- result{err: ErrNoSuchToken}
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
212 return
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
213 }
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
214 con.touch()
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
215 pcp.store(token, con)
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
216
486
b2dc9c2f69e0 First stab to use the metamorphic db to do all database stuff.
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diff changeset
217 res <- result{session: con.session}
201
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
218 }
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
219
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
220 r := <-res
80dc7bbe97db Persistent session store: Implemented Do.
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diff changeset
221
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
222 if r.err != nil {
486
b2dc9c2f69e0 First stab to use the metamorphic db to do all database stuff.
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parents: 414
diff changeset
223 return nil, r.err
201
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
224 }
80dc7bbe97db Persistent session store: Implemented Do.
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parents: 200
diff changeset
225
486
b2dc9c2f69e0 First stab to use the metamorphic db to do all database stuff.
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parents: 414
diff changeset
226 return r.session, nil
190
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
227 }
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
228
204
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
229 func (pcp *ConnectionPool) Session(token string) *Session {
202
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
230 res := make(chan *Session)
204
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
231 pcp.cmds <- func(pcp *ConnectionPool) {
202
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
232 con := pcp.conns[token]
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
233 if con == nil {
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
234 res <- nil
dba50c51cda7 Persistent session store: Implemented Session.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 201
diff changeset
235 } else {
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
236 con.touch()
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
237 pcp.store(token, con)
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
238 res <- con.session
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
239 }
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
240 }
dba50c51cda7 Persistent session store: Implemented Session.
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parents: 201
diff changeset
241 return <-res
190
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
242 }
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
243
240
9012e4045da4 Implemented /user delete controller.
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parents: 220
diff changeset
244 func (pcp *ConnectionPool) Logout(user string) {
9012e4045da4 Implemented /user delete controller.
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parents: 220
diff changeset
245 pcp.cmds <- func(pcp *ConnectionPool) {
9012e4045da4 Implemented /user delete controller.
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parents: 220
diff changeset
246 for token, con := range pcp.conns {
9012e4045da4 Implemented /user delete controller.
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parents: 220
diff changeset
247 if con.session.User == user {
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
248 delete(pcp.conns, token)
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
249 pcp.remove(token)
9012e4045da4 Implemented /user delete controller.
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parents: 220
diff changeset
250 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
251 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
252 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
253 }
9012e4045da4 Implemented /user delete controller.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 220
diff changeset
254
204
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
255 func (pcp *ConnectionPool) Shutdown() error {
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
256 if db := pcp.storage; db != nil {
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
257 log.Println("info: shutdown persistent connection pool.")
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
258 pcp.storage = nil
193
1585c334e8a7 More on persisting sessions.
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parents: 190
diff changeset
259 return db.Close()
1585c334e8a7 More on persisting sessions.
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parents: 190
diff changeset
260 }
204
3d0988d9f867 De-virtualize the connection pool implementation.
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parents: 203
diff changeset
261 log.Println("info: shutdown in-memory connection pool.")
190
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
262 return nil
3457a60fb12d Added stub for a persistent session store.
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parents:
diff changeset
263 }