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annotate roundup/backends/sessions_rdbms.py @ 5746:fea2b6e54492

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author John Rouillard <rouilj@ieee.org>
date Wed, 29 May 2019 22:56:50 -0400
parents 62de601bdf6f
children abee2c2c822e
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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 from cgi import escape
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10
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11 class BasicDatabase:
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12 ''' Provide a nice encapsulation of an RDBMS table.
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13
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14 Keys are id strings, values are automatically marshalled data.
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15 '''
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16 name = None
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17 def __init__(self, db):
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18 self.db = db
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19 self.conn, self.cursor = self.db.sql_open_connection()
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20
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21 def clear(self):
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22 self.cursor.execute('delete from %ss'%self.name)
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23
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24 def exists(self, infoid):
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25 n = self.name
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26 self.cursor.execute('select count(*) from %ss where %s_key=%s'%(n,
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27 n, self.db.arg), (infoid,))
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28 return int(self.cursor.fetchone()[0])
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29
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30 _marker = []
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31 def get(self, infoid, value, default=_marker):
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32 n = self.name
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33 self.cursor.execute('select %s_value from %ss where %s_key=%s'%(n,
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34 n, n, self.db.arg), (infoid,))
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35 res = self.cursor.fetchone()
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36 if not res:
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37 if default != self._marker:
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38 return default
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39 raise KeyError('No such %s "%s"'%(self.name, escape(infoid)))
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40 values = eval(res[0])
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41 return values.get(value, None)
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42
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43 def getall(self, infoid):
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44 n = self.name
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45 self.cursor.execute('select %s_value from %ss where %s_key=%s'%(n,
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46 n, n, self.db.arg), (infoid,))
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47 res = self.cursor.fetchone()
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48 if not res:
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49 raise KeyError('No such %s "%s"'%(self.name, escape (infoid)))
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50 return eval(res[0])
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51
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52 def set(self, infoid, **newvalues):
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53 """ Store all newvalues under key infoid with a timestamp in database.
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54
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55 If newvalues['__timestamp'] exists and is representable as a floating point number
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56 (i.e. could be generated by time.time()), that value is used for the <name>_time
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57 column in the database.
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58 """
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59 c = self.cursor
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60 n = self.name
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61 a = self.db.arg
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62 c.execute('select %s_value from %ss where %s_key=%s'%(n, n, n, a),
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63 (infoid,))
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64 res = c.fetchone()
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65 if res:
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66 values = eval(res[0])
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67 else:
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68 values = {}
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69 values.update(newvalues)
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70
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71 if res:
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72 sql = 'update %ss set %s_value=%s where %s_key=%s'%(n, n,
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73 a, n, a)
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74 args = (repr(values), infoid)
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75 else:
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76 if '__timestamp' in newvalues:
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77 try:
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78 # __timestamp must be represntable as a float. Check it.
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79 timestamp = float(newvalues['__timestamp'])
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80 except ValueError:
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81 timestamp = time.time()
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82 else:
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83 timestamp = time.time()
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84
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85 sql = 'insert into %ss (%s_key, %s_time, %s_value) '\
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86 'values (%s, %s, %s)'%(n, n, n, n, a, a, a)
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87 args = (infoid, timestamp, repr(values))
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88 c.execute(sql, args)
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89
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90 def list(self):
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91 c = self.cursor
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92 n = self.name
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93 c.execute('select %s_key from %ss'%(n, n))
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94 return [res[0] for res in c.fetchall()]
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95
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96 def destroy(self, infoid):
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97 self.cursor.execute('delete from %ss where %s_key=%s'%(self.name,
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98 self.name, self.db.arg), (infoid,))
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99
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100 def updateTimestamp(self, infoid):
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101 """ don't update every hit - once a minute should be OK """
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102 now = time.time()
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103 self.cursor.execute('''update %ss set %s_time=%s where %s_key=%s
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104 and %s_time < %s'''%(self.name, self.name, self.db.arg,
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105 self.name, self.db.arg, self.name, self.db.arg),
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106 (now, infoid, now-60))
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107
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108 def clean(self):
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109 ''' Remove session records that haven't been used for a week. '''
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110 now = time.time()
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111 week = 60*60*24*7
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112 old = now - week
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113 self.cursor.execute('delete from %ss where %s_time < %s'%(self.name,
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114 self.name, self.db.arg), (old, ))
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115
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116 def commit(self):
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117 logger = logging.getLogger('roundup.hyperdb.backend')
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118 logger.info('commit %s' % self.name)
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119 self.conn.commit()
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120 self.cursor = self.conn.cursor()
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121
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122 def close(self):
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123 self.conn.close()
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124
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125 class Sessions(BasicDatabase):
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126 name = 'session'
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127
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128 class OneTimeKeys(BasicDatabase):
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129 name = 'otk'
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130
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416606b09b27 fix vim modelines
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3918
diff changeset
131 # vim: set et sts=4 sw=4 :
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