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annotate roundup/backends/sessions.py @ 1789:8c05f8a93a36

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Normalize multiline strings for emacs.
author Johannes Gijsbers <jlgijsbers@users.sourceforge.net>
date Fri, 05 Sep 2003 21:05:18 +0000
parents bee5f62ea214
children fc52d57c6c3e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1789
8c05f8a93a36 Normalize multiline strings for emacs.
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1 #$Id: sessions.py,v 1.6 2003-09-05 21:05:18 jlgijsbers Exp $
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2 """
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3 This module defines a very basic store that's used by the CGI interface
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4 to store session and one-time-key information.
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5
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6 Yes, it's called "sessions" - because originally it only defined a session
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7 class. It's now also used for One Time Key handling too.
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8
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9 """
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10
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11 import anydbm, whichdb, os, marshal
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12
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13 class BasicDatabase:
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14 ''' Provide a nice encapsulation of an anydbm store.
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15
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16 Keys are id strings, values are automatically marshalled data.
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17 '''
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18 _db_type = None
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19
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20 def __init__(self, config):
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21 self.config = config
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22 self.dir = config.DATABASE
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23 # ensure files are group readable and writable
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24 os.umask(0002)
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25
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26 def clear(self):
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27 path = os.path.join(self.dir, self.name)
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28 if os.path.exists(path):
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29 os.remove(path)
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30 elif os.path.exists(path+'.db'): # dbm appends .db
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31 os.remove(path+'.db')
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32
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33 def cache_db_type(self, path):
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34 ''' determine which DB wrote the class file, and cache it as an
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35 attribute of __class__ (to allow for subclassed DBs to be
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36 different sorts)
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37 '''
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38 db_type = ''
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39 if os.path.exists(path):
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40 db_type = whichdb.whichdb(path)
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41 if not db_type:
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42 raise hyperdb.DatabaseError, "Couldn't identify database type"
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43 elif os.path.exists(path+'.db'):
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44 # if the path ends in '.db', it's a dbm database, whether
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45 # anydbm says it's dbhash or not!
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46 db_type = 'dbm'
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47 self.__class__._db_type = db_type
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48
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49 def get(self, infoid, value):
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50 db = self.opendb('c')
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51 try:
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52 if db.has_key(infoid):
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53 values = marshal.loads(db[infoid])
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54 else:
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55 return None
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56 return values.get(value, None)
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57 finally:
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58 db.close()
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59
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60 def getall(self, infoid):
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61 db = self.opendb('c')
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62 try:
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63 return marshal.loads(db[infoid])
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64 finally:
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65 db.close()
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66
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67 def set(self, infoid, **newvalues):
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68 db = self.opendb('c')
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69 try:
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70 if db.has_key(infoid):
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71 values = marshal.loads(db[infoid])
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72 else:
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73 values = {}
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74 values.update(newvalues)
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75 db[infoid] = marshal.dumps(values)
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76 finally:
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77 db.close()
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78
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79 def list(self):
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80 db = self.opendb('r')
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81 try:
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82 return db.keys()
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83 finally:
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84 db.close()
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85
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86 def destroy(self, infoid):
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87 db = self.opendb('c')
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88 try:
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89 if db.has_key(infoid):
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90 del db[infoid]
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91 finally:
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92 db.close()
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93
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94 def opendb(self, mode):
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95 '''Low-level database opener that gets around anydbm/dbm
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96 eccentricities.
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97 '''
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98 # figure the class db type
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99 path = os.path.join(os.getcwd(), self.dir, self.name)
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100 if self._db_type is None:
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101 self.cache_db_type(path)
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102
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103 db_type = self._db_type
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104
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105 # new database? let anydbm pick the best dbm
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106 if not db_type:
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107 return anydbm.open(path, 'c')
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108
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109 # open the database with the correct module
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110 dbm = __import__(db_type)
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111 return dbm.open(path, mode)
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112
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113 def commit(self):
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114 pass
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115
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116 class Sessions(BasicDatabase):
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117 name = 'sessions'
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118
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119 class OneTimeKeys(BasicDatabase):
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120 name = 'otks'
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121
Roundup Issue Tracker: http://roundup-tracker.org/