Allow custom server backend encoding

Server framework does not support encoding of native Python type
values stored in Param classes and sub-classes. When backend (LDAP)
value encoding differs from Python type value representation user
has to has to hard-code the encoders in his processing.

This patch introduces a method Param.encode which is used in server
context to encode native Python Param values. The new encode method
is used for Bool parameter to convert native Python bool type value
(True, False) to LDAP value ("TRUE", "FALSE").

https://fedorahosted.org/freeipa/ticket/2039

1 files changed, 17 insertions, 0 deletions

diff --git a/ipaserver/plugins/ldap2.py b/ipaserver/plugins/ldap2.py
index 5c4018293..32a1eccb4 100644
--- a/ipaserver/plugins/ldap2.py
+++ b/ipaserver/plugins/ldap2.py
@@ -45,6 +45,7 @@ from ldap.controls import LDAPControl
 from ldap.functions import explode_dn
 from ipalib.dn import DN
 from ipalib import _
+from ipalib.parameters import Bool
 
 import krbV
 
@@ -62,6 +63,22 @@ MEMBERS_INDIRECT = 2
 # SASL authentication mechanism
 SASL_AUTH = _ldap_sasl.sasl({}, 'GSSAPI')
 
+# OID 1.3.6.1.4.1.1466.115.121.1.7 (Boolean) syntax encoding
+def _encode_bool(self, value):
+    def encode_bool_value(value):
+        if value:
+            return u'TRUE'
+        else:
+            return u'FALSE'
+
+    if type(value) in (tuple, list):
+        return tuple(encode_bool_value(v) for v in value)
+    else:
+        return encode_bool_value(value)
+
+# set own Bool parameter encoder
+Bool._encode = _encode_bool
+
 # universal LDAPError handler
 def _handle_errors(e, **kw):
     """