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annotate roundup/backends/sessions.py @ 1496:e6ac4e074acb

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relaxed CVS importing (feature [SF#693277])
author Richard Jones <richard@users.sourceforge.net>
date Thu, 06 Mar 2003 07:33:29 +0000
parents 378081f066cc
children bee5f62ea214
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1 #$Id: sessions.py,v 1.4 2003-02-25 10:19:32 richard 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 def __init__(self, config):
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19 self.config = config
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20 self.dir = config.DATABASE
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21 # ensure files are group readable and writable
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22 os.umask(0002)
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23
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24 def clear(self):
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25 path = os.path.join(self.dir, self.name)
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26 if os.path.exists(path):
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27 os.remove(path)
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28 elif os.path.exists(path+'.db'): # dbm appends .db
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29 os.remove(path+'.db')
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30
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31 def determine_db_type(self, path):
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32 ''' determine which DB wrote the class file
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33 '''
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34 db_type = ''
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35 if os.path.exists(path):
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36 db_type = whichdb.whichdb(path)
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37 if not db_type:
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38 raise hyperdb.DatabaseError, "Couldn't identify database type"
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39 elif os.path.exists(path+'.db'):
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40 # if the path ends in '.db', it's a dbm database, whether
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41 # anydbm says it's dbhash or not!
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42 db_type = 'dbm'
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43 return db_type
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44
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45 def get(self, infoid, value):
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46 db = self.opendb('c')
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47 try:
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48 if db.has_key(infoid):
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49 values = marshal.loads(db[infoid])
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50 else:
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51 return None
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52 return values.get(value, None)
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53 finally:
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54 db.close()
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55
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56 def getall(self, infoid):
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57 db = self.opendb('c')
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58 try:
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59 return marshal.loads(db[infoid])
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60 finally:
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61 db.close()
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62
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63 def set(self, infoid, **newvalues):
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64 db = self.opendb('c')
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65 try:
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66 if db.has_key(infoid):
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67 values = marshal.loads(db[infoid])
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68 else:
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69 values = {}
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70 values.update(newvalues)
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71 db[infoid] = marshal.dumps(values)
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72 finally:
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73 db.close()
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74
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75 def list(self):
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76 db = self.opendb('r')
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77 try:
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78 return db.keys()
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79 finally:
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80 db.close()
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81
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82 def destroy(self, infoid):
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83 db = self.opendb('c')
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84 try:
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85 if db.has_key(infoid):
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86 del db[infoid]
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87 finally:
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88 db.close()
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89
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90 def opendb(self, mode):
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91 '''Low-level database opener that gets around anydbm/dbm
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92 eccentricities.
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93 '''
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94 # figure the class db type
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95 path = os.path.join(os.getcwd(), self.dir, self.name)
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96 db_type = self.determine_db_type(path)
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97
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98 # new database? let anydbm pick the best dbm
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99 if not db_type:
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100 return anydbm.open(path, 'c')
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101
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102 # open the database with the correct module
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103 dbm = __import__(db_type)
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104 return dbm.open(path, mode)
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105
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106 def commit(self):
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107 pass
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108
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109 class Sessions(BasicDatabase):
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110 name = 'sessions'
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111
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112 class OneTimeKeys(BasicDatabase):
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113 name = 'otks'
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114
Roundup Issue Tracker: http://roundup-tracker.org/