Mercurial > gemma
annotate pkg/auth/store.go @ 5558:a8eeb53fe43b
Bumped version for development.
author | Sascha Wilde <wilde@sha-bang.de> |
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date | Mon, 22 Nov 2021 17:02:38 +0100 |
parents | 5f47eeea988d |
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rev | line source |
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1017
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 |
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14 package auth |
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15 |
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16 import ( |
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17 "bytes" |
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18 "errors" |
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19 "time" |
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20 |
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21 bolt "go.etcd.io/bbolt" |
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22 |
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23 "gemma.intevation.de/gemma/pkg/config" |
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24 "gemma.intevation.de/gemma/pkg/log" |
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25 ) |
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26 |
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27 // ErrNoSuchToken is returned if a given token does not |
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28 // exists th the session store. |
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29 var ErrNoSuchToken = errors.New("no such token") |
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30 |
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31 // Sessions is the global connection pool. |
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32 var Sessions *SessionStore |
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33 |
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34 // SessionStore encapsulates a set of currently active sessions. |
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35 type SessionStore struct { |
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36 storage *bolt.DB |
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37 sessions map[string]*Session |
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38 cmds chan func() |
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39 } |
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40 |
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41 var sessionsBucket = []byte("sessions") |
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42 |
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43 // NewSessionStore creates a new session store. |
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44 // If the filename is empty the session are only hold in memory. |
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45 // If the filename is not empty the sessions are mirrored to |
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46 // a file with this name. Use the later option if you want |
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47 // a persistent session store. |
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48 func NewSessionStore(filename string) (*SessionStore, error) { |
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49 |
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50 ss := &SessionStore{ |
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51 sessions: make(map[string]*Session), |
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52 cmds: make(chan func()), |
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53 } |
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54 if err := ss.openStorage(filename); err != nil { |
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55 return nil, err |
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56 } |
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57 go ss.run() |
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58 return ss, nil |
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59 } |
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60 |
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61 // openStorage opens a storage file. |
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62 func (ss *SessionStore) openStorage(filename string) error { |
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63 |
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64 // No file, nothing to restore/persist. |
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65 if filename == "" { |
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66 return nil |
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67 } |
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68 |
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69 db, err := bolt.Open(filename, 0600, nil) |
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70 if err != nil { |
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71 return err |
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72 } |
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73 |
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74 err = db.Update(func(tx *bolt.Tx) error { |
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75 b, err := tx.CreateBucketIfNotExists(sessionsBucket) |
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76 if err != nil { |
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77 return err |
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78 } |
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79 |
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80 // pre-load sessions |
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81 c := b.Cursor() |
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82 |
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83 for k, v := c.First(); k != nil; k, v = c.Next() { |
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84 var session Session |
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85 if err := session.deserialize(bytes.NewReader(v)); err != nil { |
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86 return err |
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87 } |
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88 ss.sessions[string(k)] = &session |
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89 } |
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90 |
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91 return nil |
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92 }) |
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93 |
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94 if err != nil { |
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95 db.Close() |
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96 return err |
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97 } |
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98 |
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99 ss.storage = db |
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100 return nil |
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101 } |
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102 |
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103 func (ss *SessionStore) run() { |
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104 for { |
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105 select { |
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106 case cmd := <-ss.cmds: |
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107 cmd() |
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108 case <-time.After(time.Minute * 5): |
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109 ss.cleanToken() |
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110 } |
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111 } |
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112 } |
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113 |
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114 func (ss *SessionStore) cleanToken() { |
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115 now := time.Now() |
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116 for token, session := range ss.sessions { |
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117 expires := time.Unix(session.ExpiresAt, 0) |
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118 if expires.Before(now) { |
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119 delete(ss.sessions, token) |
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120 ss.remove(token) |
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121 } |
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122 } |
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123 } |
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124 |
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125 func (ss *SessionStore) remove(token string) { |
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126 if ss.storage == nil { |
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127 return |
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128 } |
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129 err := ss.storage.Update(func(tx *bolt.Tx) error { |
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130 b := tx.Bucket(sessionsBucket) |
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131 return b.Delete([]byte(token)) |
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132 }) |
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133 if err != nil { |
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134 log.Errorf("%v\n", err) |
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135 } |
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136 } |
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137 |
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138 // Delete removes a session identified by its token from the |
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139 // session store. Returns true if there was such s session. |
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140 func (ss *SessionStore) Delete(token string) bool { |
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141 res := make(chan bool) |
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142 ss.cmds <- func() { |
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143 if _, found := ss.sessions[token]; !found { |
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144 res <- false |
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145 return |
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146 } |
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147 delete(ss.sessions, token) |
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148 ss.remove(token) |
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149 res <- true |
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150 } |
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151 return <-res |
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152 } |
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153 |
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154 func (ss *SessionStore) store(token string, session *Session) { |
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155 if ss.storage == nil { |
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156 return |
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157 } |
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158 err := ss.storage.Update(func(tx *bolt.Tx) error { |
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159 b := tx.Bucket(sessionsBucket) |
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160 var buf bytes.Buffer |
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161 if err := session.serialize(&buf); err != nil { |
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162 return err |
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163 } |
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164 return b.Put([]byte(token), buf.Bytes()) |
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165 }) |
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166 if err != nil { |
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167 log.Errorf("%v\n", err) |
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168 } |
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|
169 } |
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170 |
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171 // Add puts a session into the session store identified by |
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172 // a given token. An old session with the same key will |
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173 // be replaced. |
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174 func (ss *SessionStore) Add(token string, session *Session) { |
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175 res := make(chan struct{}) |
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176 |
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177 ss.cmds <- func() { |
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178 defer close(res) |
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179 s := ss.sessions[token] |
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180 if s == nil { |
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181 s = session |
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182 ss.sessions[token] = session |
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183 } |
498
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|
184 s.touch() |
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185 ss.store(token, s) |
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|
186 } |
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|
187 |
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188 <-res |
190
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|
189 } |
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|
190 |
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191 // Renew refreshes a session. It takes an old token to |
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192 // identify a session and returns a new token with the |
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193 // freshed up one. |
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194 func (ss *SessionStore) Renew(token string) (string, error) { |
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195 |
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|
196 type result struct { |
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|
197 newToken string |
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|
198 err error |
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|
199 } |
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|
200 |
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|
201 resCh := make(chan result) |
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202 |
513
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203 ss.cmds <- func() { |
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204 session := ss.sessions[token] |
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205 if session == nil { |
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|
206 resCh <- result{err: ErrNoSuchToken} |
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|
207 } else { |
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208 delete(ss.sessions, token) |
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209 ss.remove(token) |
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|
210 newToken := generateSessionKey() |
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|
211 // TODO: Ensure that this is not racy! |
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|
212 session.ExpiresAt = time.Now().Add(config.SessionTimeout()).Unix() |
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213 ss.sessions[newToken] = session |
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214 ss.store(newToken, session) |
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|
215 resCh <- result{newToken: newToken} |
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216 } |
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217 } |
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218 |
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219 r := <-resCh |
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220 return r.newToken, r.err |
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221 } |
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222 |
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223 // Session returns the session associated with given token. |
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224 // Returns nil if no matching session was found. |
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225 func (ss *SessionStore) Session(token string) *Session { |
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226 res := make(chan *Session) |
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227 ss.cmds <- func() { |
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228 session := ss.sessions[token] |
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229 if session == nil { |
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230 res <- nil |
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231 } else { |
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232 session.touch() |
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233 ss.store(token, session) |
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234 res <- session |
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235 } |
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236 } |
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237 return <-res |
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238 } |
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239 |
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240 // Logout removes all sessions of a given user from the session store. |
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241 func (ss *SessionStore) Logout(user string) { |
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242 ss.cmds <- func() { |
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243 for token, session := range ss.sessions { |
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244 if session.User == user { |
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245 delete(ss.sessions, token) |
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246 ss.remove(token) |
240
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247 } |
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248 } |
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249 } |
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250 } |
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251 |
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252 // Shutdown closes the session store. |
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253 // If using the persistent mode the backing session database is closed. |
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254 func (ss *SessionStore) Shutdown() error { |
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255 if db := ss.storage; db != nil { |
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256 log.Infof("shutdown persistent session store.") |
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257 ss.storage = nil |
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258 return db.Close() |
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259 } |
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260 log.Infof("shutdown in-memory session store.") |
190
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261 return nil |
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262 } |