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annotate roundup/backends/sessions_rdbms.py @ 6808:375d40a9e730

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Add tests to BasicDatabase and merge implementations test/session_common.py: add new tests: * test set with bad __timestamps * test get on missing item with no default * test clear() method * test new lifetime() method everything below here was needed to get the tests to work across all db's. roundup/backends/sessions_dbm.py: make set() validate __timestamp as float. If invalid and item is new, set it to time.time(). If invalid and item exists keep original timestamp. add lifetime(key_lifetime) method. Given key_lifetime in seconds, generate a __timestamp that will be deleted after that many seconds. roundup/backends/sessions_rdbms.py: make set() behave the same as session_dbm. add lifetime method as above. roundup/backends/sessions_sqlite.py: import session_rdbms::BasicDatabase and override __init__. rather than cloning all the code. Kept a few logging and sql methods. roundup/test/memorydb.py: make get() on a missing key return KeyError make set() conform to dbm/rdbms implementations.
author John Rouillard <rouilj@ieee.org>
date Mon, 25 Jul 2022 21:21:26 -0400
parents db437dd13ed5
children fe0091279f50
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1 """This module defines a very basic store that's used by the CGI interface
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2 to store session and one-time-key information.
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3
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4 Yes, it's called "sessions" - because originally it only defined a session
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5 class. It's now also used for One Time Key handling too.
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6 """
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7 __docformat__ = 'restructuredtext'
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8 import os, time, logging
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9
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10 from roundup.anypy.html import html_escape as escape
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11
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12 class BasicDatabase:
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13 ''' Provide a nice encapsulation of an RDBMS table.
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14
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15 Keys are id strings, values are automatically marshalled data.
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16 '''
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17 name = None
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18 def __init__(self, db):
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19 self.db = db
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20 self.conn, self.cursor = self.db.sql_open_connection()
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21
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22 def clear(self):
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23 self.cursor.execute('delete from %ss'%self.name)
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24
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25 def exists(self, infoid):
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26 n = self.name
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27 self.cursor.execute('select count(*) from %ss where %s_key=%s'%(n,
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28 n, self.db.arg), (infoid,))
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29 return int(self.cursor.fetchone()[0])
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31 _marker = []
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32 def get(self, infoid, value, default=_marker):
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33 n = self.name
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34 self.cursor.execute('select %s_value from %ss where %s_key=%s'%(n,
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35 n, n, self.db.arg), (infoid,))
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36 res = self.cursor.fetchone()
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37 if not res:
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38 if default != self._marker:
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39 return default
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40 raise KeyError('No such %s "%s"'%(self.name, escape(infoid)))
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41 values = eval(res[0])
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42 return values.get(value, None)
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43
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44 def getall(self, infoid):
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45 n = self.name
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46 self.cursor.execute('select %s_value from %ss where %s_key=%s'%(n,
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47 n, n, self.db.arg), (infoid,))
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48 res = self.cursor.fetchone()
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49 if not res:
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50 raise KeyError('No such %s "%s"'%(self.name, escape (infoid)))
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51 return eval(res[0])
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52
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53 def set(self, infoid, **newvalues):
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54 """ Store all newvalues under key infoid with a timestamp in database.
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55
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56 If newvalues['__timestamp'] exists and is representable as a floating point number
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57 (i.e. could be generated by time.time()), that value is used for the <name>_time
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58 column in the database.
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59 """
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60 c = self.cursor
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61 n = self.name
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62 a = self.db.arg
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63 c.execute('select %s_value from %ss where %s_key=%s'% \
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64 (n, n, n, a),
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65 (infoid,))
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66 res = c.fetchone()
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67
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68 timestamp=time.time()
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69 if res:
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70 values = eval(res[0])
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71 else:
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72 values = {}
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73
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74 if '__timestamp' in newvalues:
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75 try:
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76 # __timestamp must be representable as a float. Check it.
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77 timestamp = float(newvalues['__timestamp'])
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78 except ValueError:
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79 if res:
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80 # keep the original timestamp
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81 del(newvalues['__timestamp'])
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82 else:
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83 # here timestamp is the new timestamp
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84 newvalues['__timestamp'] = timestamp
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85 values.update(newvalues)
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86 if res:
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87 sql = ('update %ss set %s_value=%s, %s_time=%s '
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88 'where %s_key=%s'%(n, n, a, n, a, n, a))
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89 args = (repr(values), timestamp, infoid)
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90 else:
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91 sql = 'insert into %ss (%s_key, %s_time, %s_value) '\
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92 'values (%s, %s, %s)'%(n, n, n, n, a, a, a)
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93 args = (infoid, timestamp, repr(values))
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94 c.execute(sql, args)
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95
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96 def list(self):
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97 c = self.cursor
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98 n = self.name
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99 c.execute('select %s_key from %ss'%(n, n))
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100 return [res[0] for res in c.fetchall()]
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101
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102 def destroy(self, infoid):
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103 self.cursor.execute('delete from %ss where %s_key=%s'%(self.name,
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104 self.name, self.db.arg), (infoid,))
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105
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106 def updateTimestamp(self, infoid):
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107 """ don't update every hit - once a minute should be OK """
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108 now = time.time()
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109 self.cursor.execute('''update %ss set %s_time=%s where %s_key=%s
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110 and %s_time < %s'''%(self.name, self.name, self.db.arg,
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111 self.name, self.db.arg, self.name, self.db.arg),
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112 (now, infoid, now-60))
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113
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114 def clean(self):
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115 ''' Remove session records that haven't been used for a week. '''
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116 now = time.time()
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117 week = 60*60*24*7
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118 old = now - week
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119 self.cursor.execute('delete from %ss where %s_time < %s'%(self.name,
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120 self.name, self.db.arg), (old, ))
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121
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122 def commit(self):
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123 logger = logging.getLogger('roundup.hyperdb.backend')
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124 logger.info('commit %s' % self.name)
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125 self.conn.commit()
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126 self.cursor = self.conn.cursor()
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127
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128 def lifetime(self, item_lifetime=0):
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129 """Return the proper timestamp for a key with key_lifetime specified
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130 in seconds. Default lifetime is 0.
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131 """
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132 now = time.time()
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133 week = 60*60*24*7
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134 return now - week + item_lifetime
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135
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Ralf Schlatterbeck <rsc@runtux.com>
parents: 5252
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136 def close(self):
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137 self.conn.close()
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138
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Richard Jones <richard@users.sourceforge.net>
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139 class Sessions(BasicDatabase):
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140 name = 'session'
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141
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142 class OneTimeKeys(BasicDatabase):
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143 name = 'otk'
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144
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416606b09b27 fix vim modelines
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3918
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145 # vim: set et sts=4 sw=4 :
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