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annotate roundup/backends/sessions_rdbms.py @ 8543:1ffa1f42e1da

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refactor: rework mime type comparison and clean code rest.py: accept application/* as match for application/json in non /binary_context rest path. allow defining default mime type to return when file/message is missing mime type. Make it a class variable to it can be changed from text/plain to text/markdown or whatever. extract code from determine_output_format() to create create_valid_content_types() method which returns a list of matching mime types for a given type/subtype. Eliminate mostly duplicate return statements by introducing a variable to specify valid mime types in error message. rest_common.py: Fix error messages that now return application/* as valid mime type. CHANGES.txt upgrading.txt rest.txt: top level notes and corrections. Also correct rst syntax on earlier change.
author John Rouillard <rouilj@ieee.org>
date Tue, 24 Mar 2026 21:30:47 -0400
parents fe0091279f50
children ee17f62c8341
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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 time
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9
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10 from roundup.anypy.html import html_escape as escape
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11 from roundup.backends.sessions_common import SessionCommon
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12
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13
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14 class BasicDatabase(SessionCommon):
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15 ''' Provide a nice encapsulation of an RDBMS table.
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16
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17 Keys are id strings, values are automatically marshalled data.
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18 '''
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19 name = None
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20
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21 def __init__(self, db):
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22 self.db = db
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23 self.conn, self.cursor = self.db.sql_open_connection()
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25 def clear(self):
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26 self.cursor.execute('delete from %ss' % self.name)
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27
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28 def exists(self, infoid):
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29 n = self.name
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30 self.cursor.execute('select count(*) from %ss where %s_key=%s' %
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31 (n, n, self.db.arg), (infoid,))
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32 return int(self.cursor.fetchone()[0])
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33
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34 _marker = []
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35
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36 def get(self, infoid, value, default=_marker):
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37 n = self.name
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38 self.cursor.execute('select %s_value from %ss where %s_key=%s' %
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39 (n, n, n, self.db.arg), (infoid,))
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40 res = self.cursor.fetchone()
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41 if not res:
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42 if default != self._marker:
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43 return default
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44 raise KeyError('No such %s "%s"' % (self.name, escape(infoid)))
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45 values = eval(res[0])
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46 return values.get(value, None)
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47
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48 def getall(self, infoid):
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49 n = self.name
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50 self.cursor.execute('select %s_value from %ss where %s_key=%s' %
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51 (n, n, n, self.db.arg), (infoid,))
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52 res = self.cursor.fetchone()
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53 if not res:
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54 raise KeyError('No such %s "%s"' % (self.name, escape(infoid)))
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55 return eval(res[0])
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56
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57 def set(self, infoid, **newvalues):
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58 """ Store all newvalues under key infoid with a timestamp in database.
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59
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60 If newvalues['__timestamp'] exists and is representable as
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61 a floating point number (i.e. could be generated by time.time()),
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62 that value is used for the <name>_time column in the database.
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63 """
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64 c = self.cursor
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65 n = self.name
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66 a = self.db.arg
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67 c.execute('select %s_value from %ss where %s_key=%s' %
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68 (n, n, n, a), (infoid,))
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69 res = c.fetchone()
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70
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71 timestamp = time.time()
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72 if res:
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73 values = eval(res[0])
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74 else:
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75 values = {}
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76
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77 if '__timestamp' in newvalues:
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78 try:
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79 # __timestamp must be representable as a float. Check it.
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80 timestamp = float(newvalues['__timestamp'])
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81 except ValueError:
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82 if res:
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83 # keep the original timestamp
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84 del(newvalues['__timestamp'])
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85 else:
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86 # here timestamp is the new timestamp
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87 newvalues['__timestamp'] = timestamp
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88 values.update(newvalues)
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89 if res:
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90 sql = ('update %ss set %s_value=%s, %s_time=%s '
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91 'where %s_key=%s' % (n, n, a, n, a, n, a))
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92 args = (repr(values), timestamp, infoid)
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93 else:
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94 sql = 'insert into %ss (%s_key, %s_time, %s_value) '\
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95 'values (%s, %s, %s)' % (n, n, n, n, a, a, a)
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96 args = (infoid, timestamp, repr(values))
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97 c.execute(sql, args)
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98
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99 def list(self):
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100 c = self.cursor
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101 n = self.name
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102 c.execute('select %s_key from %ss' % (n, n))
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103 return [res[0] for res in c.fetchall()]
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104
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105 def destroy(self, infoid):
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106 self.cursor.execute('delete from %ss where %s_key=%s' %
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107 (self.name, self.name, self.db.arg), (infoid,))
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108
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109 def updateTimestamp(self, infoid):
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110 """ don't update every hit - once a minute should be OK """
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111 now = time.time()
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112 self.cursor.execute('''update %ss set %s_time=%s where %s_key=%s '''
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113 '''and %s_time < %s''' %
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114 (self.name, self.name, self.db.arg, self.name,
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115 self.db.arg, self.name, self.db.arg),
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116 (now, infoid, now-60))
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117
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118 def clean(self):
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119 ''' Remove session records that haven't been used for a week. '''
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120 now = time.time()
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121 week = 60*60*24*7
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122 old = now - week
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123 self.cursor.execute('delete from %ss where %s_time < %s' %
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124 (self.name, self.name, self.db.arg), (old, ))
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125
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126 def commit(self):
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127 self.log_info('commit %s' % self.name)
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128 self.conn.commit()
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129 self.cursor = self.conn.cursor()
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130
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131 def lifetime(self, item_lifetime=0):
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132 """Return the proper timestamp for a key with key_lifetime specified
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133 in seconds. Default lifetime is 0.
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134 """
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135 now = time.time()
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136 week = 60*60*24*7
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137 return now - week + item_lifetime
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138
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139 def close(self):
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140 self.conn.close()
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141
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142
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143 class Sessions(BasicDatabase):
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144 name = 'session'
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145
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146
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147 class OneTimeKeys(BasicDatabase):
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148 name = 'otk'
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149
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150 # vim: set et sts=4 sw=4 :
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