Mercurial > p > roundup > code
annotate roundup/backends/sessions_rdbms.py @ 5806:abee2c2c822e
More cgi.escape/html.escape fixes.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Wed, 12 Jun 2019 19:17:37 -0400 |
| parents | 62de601bdf6f |
| children | 883c9e90b403 |
| rev | line source |
|---|---|
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Finished implementation of session and one-time-key stores for RDBMS backends.
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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 try: |
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11 from html import escape |
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12 except ImportError: |
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13 from cgi import escape |
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14 |
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15 class BasicDatabase: |
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16 ''' Provide a nice encapsulation of an RDBMS table. |
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17 |
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18 Keys are id strings, values are automatically marshalled data. |
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19 ''' |
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20 name = None |
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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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24 |
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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'%(n, |
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31 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 def get(self, infoid, value, default=_marker): |
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36 n = self.name |
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37 self.cursor.execute('select %s_value from %ss where %s_key=%s'%(n, |
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38 n, n, self.db.arg), (infoid,)) |
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39 res = self.cursor.fetchone() |
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40 if not res: |
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41 if default != self._marker: |
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42 return default |
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43 raise KeyError('No such %s "%s"'%(self.name, escape(infoid))) |
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44 values = eval(res[0]) |
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45 return values.get(value, None) |
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46 |
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47 def getall(self, infoid): |
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48 n = self.name |
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49 self.cursor.execute('select %s_value from %ss where %s_key=%s'%(n, |
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50 n, n, self.db.arg), (infoid,)) |
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51 res = self.cursor.fetchone() |
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52 if not res: |
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53 raise KeyError('No such %s "%s"'%(self.name, escape (infoid))) |
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54 return eval(res[0]) |
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55 |
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56 def set(self, infoid, **newvalues): |
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57 """ Store all newvalues under key infoid with a timestamp in database. |
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58 |
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59 If newvalues['__timestamp'] exists and is representable as a floating point number |
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60 (i.e. could be generated by time.time()), that value is used for the <name>_time |
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61 column in the database. |
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62 """ |
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63 c = self.cursor |
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64 n = self.name |
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65 a = self.db.arg |
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66 c.execute('select %s_value from %ss where %s_key=%s'%(n, n, n, a), |
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67 (infoid,)) |
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68 res = c.fetchone() |
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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 values.update(newvalues) |
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74 |
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75 if res: |
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76 sql = 'update %ss set %s_value=%s where %s_key=%s'%(n, n, |
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77 a, n, a) |
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78 args = (repr(values), infoid) |
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79 else: |
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80 if '__timestamp' in newvalues: |
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81 try: |
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82 # __timestamp must be represntable as a float. Check it. |
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83 timestamp = float(newvalues['__timestamp']) |
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84 except ValueError: |
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85 timestamp = time.time() |
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86 else: |
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87 timestamp = time.time() |
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88 |
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89 sql = 'insert into %ss (%s_key, %s_time, %s_value) '\ |
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90 'values (%s, %s, %s)'%(n, n, n, n, a, a, a) |
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91 args = (infoid, timestamp, repr(values)) |
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92 c.execute(sql, args) |
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93 |
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94 def list(self): |
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95 c = self.cursor |
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96 n = self.name |
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97 c.execute('select %s_key from %ss'%(n, n)) |
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98 return [res[0] for res in c.fetchall()] |
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99 |
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100 def destroy(self, infoid): |
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101 self.cursor.execute('delete from %ss where %s_key=%s'%(self.name, |
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102 self.name, self.db.arg), (infoid,)) |
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103 |
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104 def updateTimestamp(self, infoid): |
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105 """ don't update every hit - once a minute should be OK """ |
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106 now = time.time() |
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107 self.cursor.execute('''update %ss set %s_time=%s where %s_key=%s |
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108 and %s_time < %s'''%(self.name, self.name, self.db.arg, |
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109 self.name, self.db.arg, self.name, self.db.arg), |
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110 (now, infoid, now-60)) |
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111 |
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112 def clean(self): |
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113 ''' Remove session records that haven't been used for a week. ''' |
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114 now = time.time() |
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115 week = 60*60*24*7 |
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116 old = now - week |
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117 self.cursor.execute('delete from %ss where %s_time < %s'%(self.name, |
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118 self.name, self.db.arg), (old, )) |
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119 |
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120 def commit(self): |
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121 logger = logging.getLogger('roundup.hyperdb.backend') |
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122 logger.info('commit %s' % self.name) |
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123 self.conn.commit() |
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124 self.cursor = self.conn.cursor() |
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125 |
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126 def close(self): |
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127 self.conn.close() |
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128 |
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129 class Sessions(BasicDatabase): |
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130 name = 'session' |
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131 |
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132 class OneTimeKeys(BasicDatabase): |
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133 name = 'otk' |
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134 |
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135 # vim: set et sts=4 sw=4 : |
