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annotate roundup/xmlrpc.py @ 3841:c31da624ae3b

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fix RoundupRequest: the database must not be left open when an error is raised from the constructor
author Alexander Smishlajev <a1s@users.sourceforge.net>
date Wed, 04 Apr 2007 07:51:43 +0000
parents 9596a516d78c
children 3c3077582c16
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #
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2 # Copyright (C) 2007 Stefan Seefeld
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3 # All rights reserved.
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4 # For license terms see the file COPYING.txt.
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5 #
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6
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7 import base64
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8 import roundup.instance
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9 from roundup import hyperdb
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10 from roundup.cgi.exceptions import *
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11 from roundup.admin import UsageError
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12 from SimpleXMLRPCServer import SimpleXMLRPCRequestHandler
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13
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14 class RoundupRequestHandler(SimpleXMLRPCRequestHandler):
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15 """A SimpleXMLRPCRequestHandler with support for basic
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16 HTTP Authentication."""
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17
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18 def do_POST(self):
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19 """Extract username and password from authorization header."""
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20
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21 # Try to extract username and password from HTTP Authentication.
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22 self.username = None
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23 self.password = None
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24 authorization = self.headers.get('authorization', ' ')
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25 scheme, challenge = authorization.split(' ', 1)
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26
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27 if scheme.lower() == 'basic':
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28 decoded = base64.decodestring(challenge)
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29 self.username, self.password = decoded.split(':')
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30
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31 SimpleXMLRPCRequestHandler.do_POST(self)
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32
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33 def _dispatch(self, method, params):
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34 """Inject username and password into function arguments."""
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35
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36 # Add username and password to function arguments
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37 params = [self.username, self.password] + list(params)
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38 return self.server._dispatch(method, params)
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41 class RoundupRequest:
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42 """Little helper class to handle common per-request tasks such
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43 as authentication and login."""
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44
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45 def __init__(self, tracker, username, password):
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46 """Open the database for the given tracker, using the given
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47 username and password."""
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48
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49 self.tracker = tracker
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50 self.db = self.tracker.open('admin')
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51 try:
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52 userid = self.db.user.lookup(username)
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53 except KeyError: # No such user
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54 self.db.close()
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55 raise Unauthorised, 'Invalid user.'
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56 stored = self.db.user.get(userid, 'password')
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57 if stored != password: # Wrong password
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58 self.db.close()
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59 raise Unauthorised, 'Invalid user.'
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60 self.db.setCurrentUser(username)
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61
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62 def close(self):
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63 """Close the database, after committing any changes, if needed."""
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64
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65 if getattr(self, 'db'):
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66 try:
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67 if self.db.transactions:
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68 self.db.commit()
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69 finally:
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70 self.db.close()
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71
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72
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73 def get_class(self, classname):
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74 """Return the class for the given classname."""
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75
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76 try:
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77 return self.db.getclass(classname)
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78 except KeyError:
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79 raise UsageError, 'no such class "%s"'%classname
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80
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81 def props_from_args(self, cl, args):
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82 """Construct a list of properties from the given arguments,
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83 and return them after validation."""
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84
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85 props = {}
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86 for arg in args:
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87 if arg.find('=') == -1:
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88 raise UsageError, 'argument "%s" not propname=value'%arg
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89 l = arg.split('=')
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90 if len(l) < 2:
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91 raise UsageError, 'argument "%s" not propname=value'%arg
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92 key, value = l[0], '='.join(l[1:])
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93 if value:
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94 try:
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95 props[key] = hyperdb.rawToHyperdb(self.db, cl, None,
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96 key, value)
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97 except hyperdb.HyperdbValueError, message:
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98 raise UsageError, message
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99 else:
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100 props[key] = None
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101
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102 return props
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103
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104
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105 #The server object
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106 class RoundupServer:
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107 """The RoundupServer provides the interface accessible through
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108 the Python XMLRPC mapping. All methods take an additional username
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109 and password argument so each request can be authenticated."""
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110
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111 def __init__(self, tracker, verbose = False):
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112 self.tracker = roundup.instance.open(tracker)
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113 self.verbose = verbose
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114
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115 def list(self, username, password, classname, propname = None):
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116
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117 r = RoundupRequest(self.tracker, username, password)
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118 cl = r.get_class(classname)
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119 if not propname:
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120 propname = cl.labelprop()
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121 result = [cl.get(id, propname) for id in cl.list()]
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122 r.close()
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123 return result
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124
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125 def display(self, username, password, designator, *properties):
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126
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127 r = RoundupRequest(self.tracker, username, password)
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128 classname, nodeid = hyperdb.splitDesignator(designator)
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129 cl = r.get_class(classname)
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130 props = properties and list(properties) or cl.properties.keys()
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131 props.sort()
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132 result = [(property, cl.get(nodeid, property)) for property in props]
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133 r.close()
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134 return dict(result)
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135
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136 def create(self, username, password, classname, *args):
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137
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138 r = RoundupRequest(self.tracker, username, password)
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139 cl = r.get_class(classname)
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140
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141 # convert types
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142 props = r.props_from_args(cl, args)
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143
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144 # check for the key property
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145 key = cl.getkey()
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146 if key and not props.has_key(key):
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147 raise UsageError, 'you must provide the "%s" property.'%key
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148
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149 # do the actual create
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150 try:
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151 try:
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152 result = cl.create(**props)
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153 except (TypeError, IndexError, ValueError), message:
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154 raise UsageError, message
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155 finally:
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156 r.close()
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157 return result
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158
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159 def set(self, username, password, designator, *args):
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160
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161 r = RoundupRequest(self.tracker, username, password)
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162 classname, itemid = hyperdb.splitDesignator(designator)
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163 cl = r.get_class(classname)
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164
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165 # convert types
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166 props = r.props_from_args(cl, args)
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167 try:
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168 try:
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169 cl.set(itemid, **props)
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170 except (TypeError, IndexError, ValueError), message:
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171 raise UsageError, message
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172 finally:
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173 r.close()
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174
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175 # vim: set et sts=4 sw=4 :
Roundup Issue Tracker: http://roundup-tracker.org/