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"""
ldapobject.py - wraps class _ldap.LDAPObject
written by Michael Stroeder <michael@stroeder.com>
See http://python-ldap.sourceforge.net for details.
\$Id: ldapobject.py,v 1.92 2005/11/03 09:09:43 stroeder Exp $
Compability:
- Tested with Python 2.0+ but should work with Python 1.5.x
- LDAPObject class should be exactly the same like _ldap.LDAPObject
Usage:
Directly imported by ldap/__init__.py. The symbols of _ldap are
overridden.
Thread-lock:
Basically calls into the LDAP lib are serialized by the module-wide
lock self._ldap_object_lock.
"""
__version__ = '0.7.0'
__all__ = [
'LDAPObject',
'SimpleLDAPObject',
'NonblockingLDAPObject',
'ReconnectLDAPObject',
'SmartLDAPObject'
]
if __debug__:
# Tracing is only supported in debugging mode
import traceback
import sys,time,_ldap,ldap,ldap.functions
from ldap.schema import SCHEMA_ATTRS
from ldap.controls import LDAPControl,DecodeControlTuples,EncodeControlTuples
from ldap import LDAPError
class SimpleLDAPObject:
"""
Drop-in wrapper class around _ldap.LDAPObject
"""
CLASSATTR_OPTION_MAPPING = {
# taken from Modules/options.h
"protocol_version": ldap.OPT_PROTOCOL_VERSION,
"deref": ldap.OPT_DEREF,
"referrals": ldap.OPT_REFERRALS,
"timelimit": ldap.OPT_TIMELIMIT,
"sizelimit": ldap.OPT_SIZELIMIT,
"network_timeout": ldap.OPT_NETWORK_TIMEOUT,
}
def __init__(
self,uri,
trace_level=0,trace_file=None,trace_stack_limit=5
):
self._trace_level = trace_level
self._trace_file = trace_file or sys.stdout
self._trace_stack_limit = trace_stack_limit
self._uri = uri
self._ldap_object_lock = self._ldap_lock()
self._l = ldap.functions._ldap_function_call(_ldap.initialize,uri)
self.timeout = -1
self.protocol_version = ldap.VERSION3
def _ldap_lock(self):
if ldap.LIBLDAP_R:
return ldap.LDAPLock()
else:
return ldap._ldap_module_lock
def _ldap_call(self,func,*args,**kwargs):
"""
Wrapper method mainly for serializing calls into OpenLDAP libs
and trace logs
"""
if __debug__:
if self._trace_level>=1:# and func.__name__!='result':
self._trace_file.write('*** %s - %s (%s,%s)\n' % (
self._uri,
self.__class__.__name__+'.'+func.__name__,
repr(args),repr(kwargs)
))
if self._trace_level>=3:
traceback.print_stack(limit=self._trace_stack_limit,file=self._trace_file)
self._ldap_object_lock.acquire()
try:
try:
result = func(*args,**kwargs)
finally:
self._ldap_object_lock.release()
except LDAPError,e:
if __debug__ and self._trace_level>=2:
self._trace_file.write('=> LDAPError - %s: %s\n' % (e.__class__.__name__,str(e)))
raise
if __debug__ and self._trace_level>=2:
if result!=None and result!=(None,None):
self._trace_file.write('=> result: %s\n' % (repr(result)))
return result
def __setattr__(self,name,value):
if self.CLASSATTR_OPTION_MAPPING.has_key(name):
self.set_option(self.CLASSATTR_OPTION_MAPPING[name],value)
else:
self.__dict__[name] = value
def __getattr__(self,name):
if self.CLASSATTR_OPTION_MAPPING.has_key(name):
return self.get_option(self.CLASSATTR_OPTION_MAPPING[name])
elif self.__dict__.has_key(name):
return self.__dict__[name]
else:
raise AttributeError,'%s has no attribute %s' % (
self.__class__.__name__,repr(name)
)
def abandon_ext(self,msgid,serverctrls=None,clientctrls=None):
"""
abandon_ext(msgid[,serverctrls=None[,clientctrls=None]]) -> None
abandon(msgid) -> None
Abandons or cancels an LDAP operation in progress. The msgid should
be the message id of an outstanding LDAP operation as returned
by the asynchronous methods search(), modify() etc. The caller
can expect that the result of an abandoned operation will not be
returned from a future call to result().
"""
return self._ldap_call(self._l.abandon_ext,msgid,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def abandon(self,msgid):
return self.abandon_ext(msgid,None,None)
def add_ext(self,dn,modlist,serverctrls=None,clientctrls=None):
"""
add_ext(dn, modlist[,serverctrls=None[,clientctrls=None]]) -> int
This function adds a new entry with a distinguished name
specified by dn which means it must not already exist.
The parameter modlist is similar to the one passed to modify(),
except that no operation integer need be included in the tuples.
"""
return self._ldap_call(self._l.add_ext,dn,modlist,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def add_ext_s(self,dn,modlist,serverctrls=None,clientctrls=None):
msgid = self.add_ext(dn,modlist,serverctrls,clientctrls)
return self.result(msgid,all=1,timeout=self.timeout)
def add(self,dn,modlist):
"""
add(dn, modlist) -> int
This function adds a new entry with a distinguished name
specified by dn which means it must not already exist.
The parameter modlist is similar to the one passed to modify(),
except that no operation integer need be included in the tuples.
"""
return self.add_ext(dn,modlist,None,None)
def add_s(self,dn,modlist):
msgid = self.add(dn,modlist)
return self.result(msgid,all=1,timeout=self.timeout)
def simple_bind(self,who='',cred='',serverctrls=None,clientctrls=None):
"""
simple_bind([who='' [,cred='']]) -> int
"""
return self._ldap_call(self._l.simple_bind,who,cred,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def simple_bind_s(self,who='',cred='',serverctrls=None,clientctrls=None):
"""
simple_bind_s([who='' [,cred='']]) -> None
"""
msgid = self.simple_bind(who,cred,serverctrls,clientctrls)
return self.result(msgid,all=1,timeout=self.timeout)
def bind(self,who,cred,method=ldap.AUTH_SIMPLE):
"""
bind(who, cred, method) -> int
"""
assert method==ldap.AUTH_SIMPLE,'Only simple bind supported in LDAPObject.bind()'
return self.simple_bind(who,cred)
def bind_s(self,who,cred,method=ldap.AUTH_SIMPLE):
"""
bind_s(who, cred, method) -> None
"""
msgid = self.bind(who,cred,method)
return self.result(msgid,all=1,timeout=self.timeout)
def sasl_interactive_bind_s(self,who,auth,serverctrls=None,clientctrls=None,sasl_flags=ldap.SASL_QUIET):
"""
sasl_interactive_bind_s(who, auth) -> None
"""
return self._ldap_call(self._l.sasl_interactive_bind_s,who,auth,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls),sasl_flags)
def compare_ext(self,dn,attr,value,serverctrls=None,clientctrls=None):
"""
compare_ext(dn, attr, value [,serverctrls=None[,clientctrls=None]]) -> int
compare_ext_s(dn, attr, value [,serverctrls=None[,clientctrls=None]]) -> int
compare(dn, attr, value) -> int
compare_s(dn, attr, value) -> int
Perform an LDAP comparison between the attribute named attr of
entry dn, and the value value. The synchronous form returns 0
for false, or 1 for true. The asynchronous form returns the
message id of the initiates request, and the result of the
asynchronous compare can be obtained using result().
Note that this latter technique yields the answer by raising
the exception objects COMPARE_TRUE or COMPARE_FALSE.
A design bug in the library prevents value from containing
nul characters.
"""
return self._ldap_call(self._l.compare_ext,dn,attr,value,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def compare_ext_s(self,dn,attr,value,serverctrls=None,clientctrls=None):
msgid = self.compare_ext(dn,attr,value,serverctrls,clientctrls)
try:
self.result(msgid,all=1,timeout=self.timeout)
except _ldap.COMPARE_TRUE:
return 1
except _ldap.COMPARE_FALSE:
return 0
return None
def compare(self,dn,attr,value):
return self.compare_ext(dn,attr,value,None,None)
def compare_s(self,dn,attr,value):
return self.compare_ext_s(dn,attr,value,None,None)
def delete_ext(self,dn,serverctrls=None,clientctrls=None):
"""
delete(dn) -> int
delete_s(dn) -> None
delete_ext(dn[,serverctrls=None[,clientctrls=None]]) -> int
delete_ext_s(dn[,serverctrls=None[,clientctrls=None]]) -> None
Performs an LDAP delete operation on dn. The asynchronous
form returns the message id of the initiated request, and the
result can be obtained from a subsequent call to result().
"""
return self._ldap_call(self._l.delete_ext,dn,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def delete_ext_s(self,dn,serverctrls=None,clientctrls=None):
msgid = self.delete_ext(dn,serverctrls,clientctrls)
return self.result(msgid,all=1,timeout=self.timeout)
def delete(self,dn):
return self.delete_ext(dn,None,None)
def delete_s(self,dn):
return self.delete_ext_s(dn,None,None)
def manage_dsa_it(self,enable,critical=0):
"""
manage_dsa_it() -> None
Enable or disable manageDSAit mode (see draft-zeilenga-ldap-namedref)
"""
all_server_ctrls = [
c
for c in self.get_option(ldap.OPT_SERVER_CONTROLS) or []
if c.controlType!='2.16.840.1.113730.3.4.2'
]
if enable:
all_server_ctrls.append(LDAPControl('2.16.840.1.113730.3.4.2',critical,None))
self.set_option(ldap.OPT_SERVER_CONTROLS,all_server_ctrls)
def modify_ext(self,dn,modlist,serverctrls=None,clientctrls=None):
"""
modify_ext(dn, modlist[,serverctrls=None[,clientctrls=None]]) -> int
"""
return self._ldap_call(self._l.modify_ext,dn,modlist,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def modify_ext_s(self,dn,modlist,serverctrls=None,clientctrls=None):
msgid = self.modify_ext(dn,modlist,serverctrls,clientctrls)
return self.result(msgid,all=1,timeout=self.timeout)
def modify(self,dn,modlist):
"""
modify(dn, modlist) -> int
modify_s(dn, modlist) -> None
modify_ext(dn, modlist[,serverctrls=None[,clientctrls=None]]) -> int
modify_ext_s(dn, modlist[,serverctrls=None[,clientctrls=None]]) -> None
Performs an LDAP modify operation on an entry's attributes.
dn is the DN of the entry to modify, and modlist is the list
of modifications to make to the entry.
Each element of the list modlist should be a tuple of the form
(mod_op,mod_type,mod_vals), where mod_op is the operation (one
of MOD_ADD, MOD_DELETE, or MOD_REPLACE), mod_type is a string
indicating the attribute type name, and mod_vals is either
a string value or a list of string values to add, delete or
replace respectively. For the delete operation, mod_vals may
be None indicating that all attributes are to be deleted.
The asynchronous modify() returns the message id of the
initiated request.
"""
return self.modify_ext(dn,modlist,None,None)
def modify_s(self,dn,modlist):
msgid = self.modify(dn,modlist)
return self.result(msgid,all=1,timeout=self.timeout)
def modrdn(self,dn,newrdn,delold=1):
"""
modrdn(dn, newrdn [,delold=1]) -> int
modrdn_s(dn, newrdn [,delold=1]) -> None
Perform a modify RDN operation. These routines take dn, the
DN of the entry whose RDN is to be changed, and newrdn, the
new RDN to give to the entry. The optional parameter delold
is used to specify whether the old RDN should be kept as
an attribute of the entry or not. The asynchronous version
returns the initiated message id.
This operation is emulated by rename() and rename_s() methods
since the modrdn2* routines in the C library are deprecated.
"""
return self.rename(dn,newrdn,None,delold)
def modrdn_s(self,dn,newrdn,delold=1):
return self.rename_s(dn,newrdn,None,delold)
def passwd(self,user,oldpw,newpw,serverctrls=None,clientctrls=None):
return self._ldap_call(self._l.passwd,user,oldpw,newpw,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def passwd_s(self,user,oldpw,newpw,serverctrls=None,clientctrls=None):
msgid = self.passwd(user,oldpw,newpw,serverctrls,clientctrls)
return self.result(msgid,all=1,timeout=self.timeout)
def rename(self,dn,newrdn,newsuperior=None,delold=1,serverctrls=None,clientctrls=None):
"""
rename(dn, newrdn [, newsuperior=None [,delold=1][,serverctrls=None[,clientctrls=None]]]) -> int
rename_s(dn, newrdn [, newsuperior=None] [,delold=1][,serverctrls=None[,clientctrls=None]]) -> None
Perform a rename entry operation. These routines take dn, the
DN of the entry whose RDN is to be changed, newrdn, the
new RDN, and newsuperior, the new parent DN, to give to the entry.
If newsuperior is None then only the RDN is modified.
The optional parameter delold is used to specify whether the
old RDN should be kept as an attribute of the entry or not.
The asynchronous version returns the initiated message id.
This actually corresponds to the rename* routines in the
LDAP-EXT C API library.
"""
return self._ldap_call(self._l.rename,dn,newrdn,newsuperior,delold,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def rename_s(self,dn,newrdn,newsuperior=None,delold=1):
msgid = self.rename(dn,newrdn,newsuperior,delold)
return self.result(msgid,all=1,timeout=self.timeout)
def result(self,msgid=ldap.RES_ANY,all=1,timeout=None):
"""
result([msgid=RES_ANY [,all=1 [,timeout=None]]]) -> (result_type, result_data)
This method is used to wait for and return the result of an
operation previously initiated by one of the LDAP asynchronous
operation routines (eg search(), modify(), etc.) They all
returned an invocation identifier (a message id) upon successful
initiation of their operation. This id is guaranteed to be
unique across an LDAP session, and can be used to request the
result of a specific operation via the msgid parameter of the
result() method.
If the result of a specific operation is required, msgid should
be set to the invocation message id returned when the operation
was initiated; otherwise RES_ANY should be supplied.
The all parameter only has meaning for search() responses
and is used to select whether a single entry of the search
response should be returned, or to wait for all the results
of the search before returning.
A search response is made up of zero or more search entries
followed by a search result. If all is 0, search entries will
be returned one at a time as they come in, via separate calls
to result(). If all is 1, the search response will be returned
in its entirety, i.e. after all entries and the final search
result have been received.
For all set to 0, result tuples
trickle in (with the same message id), and with the result type
RES_SEARCH_ENTRY, until the final result which has a result
type of RES_SEARCH_RESULT and a (usually) empty data field.
When all is set to 1, only one result is returned, with a
result type of RES_SEARCH_RESULT, and all the result tuples
listed in the data field.
The method returns a tuple of the form (result_type,
result_data). The result_type is one of the constants RES_*.
See search() for a description of the search result's
result_data, otherwise the result_data is normally meaningless.
The result() method will block for timeout seconds, or
indefinitely if timeout is negative. A timeout of 0 will effect
a poll. The timeout can be expressed as a floating-point value.
If timeout is None the default in self.timeout is used.
If a timeout occurs, a TIMEOUT exception is raised, unless
polling (timeout = 0), in which case (None, None) is returned.
"""
res_type,res_data,res_msgid = self.result2(msgid,all,timeout)
return res_type,res_data
def result2(self,msgid=_ldap.RES_ANY,all=1,timeout=None):
res_type, res_data, res_msgid, srv_ctrls = self.result3(msgid,all,timeout)
return res_type, res_data, res_msgid
def result3(self,msgid=_ldap.RES_ANY,all=1,timeout=None):
if timeout is None:
timeout = self.timeout
rtype, rdata, rmsgid, serverctrls = self._ldap_call(self._l.result3,msgid,all,timeout)
decoded_serverctrls = DecodeControlTuples(serverctrls)
return rtype, rdata, rmsgid, decoded_serverctrls
def search_ext(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrsonly=0,serverctrls=None,clientctrls=None,timeout=-1,sizelimit=0):
"""
search(base, scope [,filterstr='(objectClass=*)' [,attrlist=None [,attrsonly=0]]]) -> int
search_s(base, scope [,filterstr='(objectClass=*)' [,attrlist=None [,attrsonly=0]]])
search_st(base, scope [,filterstr='(objectClass=*)' [,attrlist=None [,attrsonly=0 [,timeout=-1]]]])
search_ext(base,scope,[,filterstr='(objectClass=*)' [,attrlist=None [,attrsonly=0 [,serverctrls=None [,clientctrls=None [,timeout=-1 [,sizelimit=0]]]]]]])
search_ext_s(base,scope,[,filterstr='(objectClass=*)' [,attrlist=None [,attrsonly=0 [,serverctrls=None [,clientctrls=None [,timeout=-1 [,sizelimit=0]]]]]]])
Perform an LDAP search operation, with base as the DN of
the entry at which to start the search, scope being one of
SCOPE_BASE (to search the object itself), SCOPE_ONELEVEL
(to search the object's immediate children), or SCOPE_SUBTREE
(to search the object and all its descendants).
filter is a string representation of the filter to
apply in the search (see RFC 2254).
Each result tuple is of the form (dn,entry), where dn is a
string containing the DN (distinguished name) of the entry, and
entry is a dictionary containing the attributes.
Attributes types are used as string dictionary keys and attribute
values are stored in a list as dictionary value.
The DN in dn is extracted using the underlying ldap_get_dn(),
which may raise an exception of the DN is malformed.
If attrsonly is non-zero, the values of attrs will be
meaningless (they are not transmitted in the result).
The retrieved attributes can be limited with the attrlist
parameter. If attrlist is None, all the attributes of each
entry are returned.
serverctrls=None
clientctrls=None
The synchronous form with timeout, search_st() or search_ext_s(),
will block for at most timeout seconds (or indefinitely if
timeout is negative). A TIMEOUT exception is raised if no result is
received within the time.
The amount of search results retrieved can be limited with the
sizelimit parameter if non-zero.
"""
return self._ldap_call(
self._l.search_ext,
base,scope,filterstr,
attrlist,attrsonly,
EncodeControlTuples(serverctrls),
EncodeControlTuples(clientctrls),
timeout,sizelimit,
)
def search_ext_s(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrsonly=0,serverctrls=None,clientctrls=None,timeout=-1,sizelimit=0):
msgid = self.search_ext(base,scope,filterstr,attrlist,attrsonly,serverctrls,clientctrls,timeout,sizelimit)
return self.result(msgid,all=1,timeout=timeout)[1]
def search(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrsonly=0):
return self.search_ext(base,scope,filterstr,attrlist,attrsonly,None,None)
def search_s(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrsonly=0):
return self.search_ext_s(base,scope,filterstr,attrlist,attrsonly,None,None,timeout=self.timeout)
def search_st(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrsonly=0,timeout=-1):
return self.search_ext_s(base,scope,filterstr,attrlist,attrsonly,None,None,timeout)
def set_cache_options(self,*args,**kwargs):
"""
set_cache_options(option) -> None
Changes the caching behaviour. Currently supported options are
CACHE_OPT_CACHENOERRS, which suppresses caching of requests
that resulted in an error, and
CACHE_OPT_CACHEALLERRS, which enables caching of all requests.
The default behaviour is not to cache requests that result in
errors, except those that result in a SIZELIMIT_EXCEEDED exception.
"""
return self._ldap_call(self._l.set_cache_options,*args,**kwargs)
def start_tls_s(self):
"""
start_tls_s() -> None
Negotiate TLS with server. The `version' attribute must have been
set to VERSION3 before calling start_tls_s.
If TLS could not be started an exception will be raised.
"""
return self._ldap_call(self._l.start_tls_s)
def unbind_ext(self,serverctrls=None,clientctrls=None):
"""
unbind() -> int
unbind_s() -> None
unbind_ext() -> int
unbind_ext_s() -> None
This call is used to unbind from the directory, terminate
the current association, and free resources. Once called, the
connection to the LDAP server is closed and the LDAP object
is invalid. Further invocation of methods on the object will
yield an exception.
The unbind and unbind_s methods are identical, and are
synchronous in nature
"""
return self._ldap_call(self._l.unbind_ext,EncodeControlTuples(serverctrls),EncodeControlTuples(clientctrls))
def unbind_ext_s(self,serverctrls=None,clientctrls=None):
msgid = self.unbind_ext(serverctrls,clientctrls)
if msgid!=None:
return self.result(msgid,all=1,timeout=self.timeout)
def unbind(self):
return self.unbind_ext(None,None)
def unbind_s(self):
return self.unbind_ext_s(None,None)
def whoami_s(self,serverctrls=None,clientctrls=None):
return self._ldap_call(self._l.whoami_s,serverctrls,clientctrls)
def get_option(self,option):
result = self._ldap_call(self._l.get_option,option)
if option==ldap.OPT_SERVER_CONTROLS or option==ldap.OPT_CLIENT_CONTROLS:
result = DecodeControlTuples(result)
return result
def set_option(self,option,invalue):
if option==ldap.OPT_SERVER_CONTROLS or option==ldap.OPT_CLIENT_CONTROLS:
invalue = EncodeControlTuples(invalue)
return self._ldap_call(self._l.set_option,option,invalue)
def search_subschemasubentry_s(self,dn=''):
"""
Returns the distinguished name of the sub schema sub entry
for a part of a DIT specified by dn.
None as result indicates that the DN of the sub schema sub entry could
not be determined.
"""
try:
r = self.search_s(
dn,ldap.SCOPE_BASE,'(objectClass=*)',['subschemaSubentry']
)
except (ldap.NO_SUCH_OBJECT,ldap.NO_SUCH_ATTRIBUTE,ldap.INSUFFICIENT_ACCESS):
r = []
except ldap.UNDEFINED_TYPE:
return None
try:
if r:
e = ldap.cidict.cidict(r[0][1])
search_subschemasubentry_dn = e.get('subschemaSubentry',[None])[0]
if search_subschemasubentry_dn is None:
if dn:
# Try to find sub schema sub entry in root DSE
return self.search_subschemasubentry_s(dn='')
else:
# If dn was already root DSE we can return here
return None
else:
return search_subschemasubentry_dn
except IndexError:
return None
def read_subschemasubentry_s(self,subschemasubentry_dn,attrs=None):
"""
Returns the sub schema sub entry's data
"""
attrs = attrs or SCHEMA_ATTRS
try:
r = self.search_s(
subschemasubentry_dn,ldap.SCOPE_BASE,
'(objectClass=subschema)',
attrs
)
except ldap.NO_SUCH_OBJECT:
return None
else:
if r:
return r[0][1]
else:
return None
class NonblockingLDAPObject(SimpleLDAPObject):
def __init__(self,uri,trace_level=0,trace_file=None,result_timeout=-1):
self._result_timeout = result_timeout
SimpleLDAPObject.__init__(self,uri,trace_level,trace_file)
def result(self,msgid=_ldap.RES_ANY,all=1,timeout=-1):
"""
"""
ldap_result = self._ldap_call(self._l.result,msgid,0,self._result_timeout)
if not all:
return ldap_result
start_time = time.time()
all_results = []
while all:
while ldap_result[0] is None:
if (timeout>=0) and (time.time()-start_time>timeout):
self._ldap_call(self._l.abandon,msgid)
raise _ldap.TIMEOUT(
"LDAP time limit (%d secs) exceeded." % (timeout)
)
time.sleep(0.00001)
ldap_result = self._ldap_call(self._l.result,msgid,0,self._result_timeout)
if ldap_result[1] is None:
break
all_results.extend(ldap_result[1])
ldap_result = None,None
return all_results
def search_st(self,base,scope,filterstr='(objectClass=*)',attrlist=None,attrsonly=0,timeout=-1):
msgid = self.search(base,scope,filterstr,attrlist,attrsonly)
return self.result(msgid,all=1,timeout=timeout)
class ReconnectLDAPObject(SimpleLDAPObject):
"""
In case of server failure (ldap.SERVER_DOWN) the implementations
of all synchronous operation methods (search_s() etc.) are doing
an automatic reconnect and rebind and will retry the very same
operation.
This is very handy for broken LDAP server implementations
(e.g. in Lotus Domino) which drop connections very often making
it impossible to have a long-lasting control flow in the
application.
"""
__transient_attrs__ = {
'_l':None,
'_ldap_object_lock':None,
'_trace_file':None,
}
def __init__(
self,uri,
trace_level=0,trace_file=None,trace_stack_limit=5,
retry_max=1,retry_delay=60.0
):
"""
Parameters like SimpleLDAPObject.__init__() with these
additional arguments:
retry_max
Maximum count of reconnect trials
retry_delay
Time span to wait between two reconnect trials
"""
self._uri = uri
self._options = {}
self._last_bind = None
SimpleLDAPObject.__init__(
self,uri,
trace_level,
trace_file,
trace_stack_limit
)
self._retry_max = retry_max
self._retry_delay = retry_delay
self._start_tls = 0
self._reconnects_done = 0L
def __getstate__(self):
"""return data representation for pickled object"""
d = {}
for k,v in self.__dict__.items():
if not self.__transient_attrs__.has_key(k):
d[k] = v
return d
def __setstate__(self,d):
"""set up the object from pickled data"""
self.__dict__.update(d)
self._ldap_object_lock = self._ldap_lock()
self._trace_file = sys.stdout
self.reconnect(self._uri)
def _apply_last_bind(self):
if self._last_bind!=None:
func,args,kwargs = self._last_bind
func(*args,**kwargs)
def _restore_options(self):
"""Restore all recorded options"""
for k,v in self._options.items():
SimpleLDAPObject.set_option(self,k,v)
def reconnect(self,uri):
# Drop and clean up old connection completely
# Reconnect
reconnect_counter = self._retry_max
while reconnect_counter:
if __debug__ and self._trace_level>=1:
self._trace_file.write('*** Try %d. reconnect to %s...\n' % (
self._retry_max-reconnect_counter+1,uri
))
try:
# Do the connect
self._l = ldap.functions._ldap_function_call(_ldap.initialize,uri)
self._restore_options()
# StartTLS extended operation in case this was called before
if self._start_tls:
self.start_tls_s()
# Repeat last simple or SASL bind
self._apply_last_bind()
except:
if __debug__ and self._trace_level>=1:
self._trace_file.write('*** %d. reconnect to %s failed\n' % (
self._retry_max-reconnect_counter+1,uri
))
reconnect_counter = reconnect_counter-1
if not reconnect_counter:
raise
if __debug__ and self._trace_level>=1:
self._trace_file.write('=> delay %s...\n' % (self._retry_delay))
time.sleep(self._retry_delay)
else:
if __debug__ and self._trace_level>=1:
self._trace_file.write('*** %d. reconnect to %s successful, last operation will be repeated\n' % (
self._retry_max-reconnect_counter+1,uri
))
self._reconnects_done = self._reconnects_done + 1L
break
def _apply_method_s(self,func,*args,**kwargs):
try:
return func(self,*args,**kwargs)
except ldap.SERVER_DOWN:
# Reconnect
self.reconnect(self._uri)
# Re-try last operation
return func(self,*args,**kwargs)
def set_option(self,option,invalue):
self._options[option] = invalue
SimpleLDAPObject.set_option(self,option,invalue)
def simple_bind_s(self,*args,**kwargs):
self._last_bind = (self.simple_bind_s,args,kwargs)
return SimpleLDAPObject.simple_bind_s(self,*args,**kwargs)
def start_tls_s(self):
res = SimpleLDAPObject.start_tls_s(self)
self._start_tls = 1
return res
def sasl_interactive_bind_s(self,*args,**kwargs):
"""
sasl_interactive_bind_s(who, auth) -> None
"""
self._last_bind = (self.sasl_interactive_bind_s,args,kwargs)
return SimpleLDAPObject.sasl_interactive_bind_s(self,*args,**kwargs)
def add_ext_s(self,*args,**kwargs):
return self._apply_method_s(SimpleLDAPObject.add_ext_s,*args,**kwargs)
def compare_s(self,*args,**kwargs):
return self._apply_method_s(SimpleLDAPObject.compare_s,*args,**kwargs)
def delete_ext_s(self,*args,**kwargs):
return self._apply_method_s(SimpleLDAPObject.delete_ext_s,*args,**kwargs)
def modify_ext_s(self,*args,**kwargs):
return self._apply_method_s(SimpleLDAPObject.modify_ext_s,*args,**kwargs)
def rename_s(self,*args,**kwargs):
return self._apply_method_s(SimpleLDAPObject.rename_s,*args,**kwargs)
def search_ext_s(self,*args,**kwargs):
return self._apply_method_s(SimpleLDAPObject.search_ext_s,*args,**kwargs)
class SmartLDAPObject(ReconnectLDAPObject):
"""
Mainly the __init__() method does some smarter things
like negotiating the LDAP protocol version and calling
LDAPObject.start_tls_s().
"""
def __init__(
self,uri,
trace_level=0,trace_file=None,trace_stack_limit=5,
retry_max=1,retry_delay=60.0,
who='',cred='',
start_tls=1,
tls_cacertfile=None,tls_cacertdir=None,
tls_clcertfile=None,tls_clkeyfile=None,
):
"""
Return LDAPObject instance by opening LDAP connection to
LDAP host specified by LDAP URL.
Unlike ldap.initialize() this function also trys to bind
explicitly with the bind DN and credential given as parameter,
probe the supported LDAP version and trys to use
StartTLS extended operation if this was specified.
Parameters like ReconnectLDAPObject.__init__() with these
additional arguments:
who,cred
The Bind-DN and credential to use for simple bind
right after connecting.
start_tls
Determines if StartTLS extended operation is tried
on a LDAPv3 server and if the LDAP URL scheme is ldap:.
If LDAP URL scheme is not ldap: (e.g. ldaps: or ldapi:)
this parameter is ignored.
0 Don't use StartTLS ext op
1 Try StartTLS ext op but proceed when unavailable
2 Try StartTLS ext op and re-raise exception if it fails
tls_cacertfile
tls_clcertfile
tls_clkeyfile
"""
# Initialize LDAP connection
ReconnectLDAPObject.__init__(
self,uri,
trace_level=trace_level,
trace_file=trace_file,
trace_stack_limit=trace_stack_limit,
retry_max=retry_max,
retry_delay=retry_delay
)
# Set protocol version to LDAPv3
self.protocol_version = ldap.VERSION3
self.started_tls = 0
try:
self.simple_bind_s(who,cred)
except ldap.PROTOCOL_ERROR:
# Drop connection completely
self.unbind_s() ; del self._l
self._l = self._ldap_call(_ldap.initialize,self._uri)
self.protocol_version = ldap.VERSION2
self.simple_bind_s(who,cred)
# Try to start TLS if requested
if start_tls>0 and uri[:5]=='ldap:':
if self.protocol_version>=ldap.VERSION3:
try:
self.start_tls_s()
except (ldap.PROTOCOL_ERROR,ldap.CONNECT_ERROR):
if start_tls>=2:
# Application does not accept clear-text connection
# => re-raise exception
raise
else:
self.started_tls = 1
else:
if start_tls>=2:
raise ValueError,"StartTLS extended operation only possible on LDAPv3+ server!"
if self.protocol_version==ldap.VERSION2 or (who and cred):
self.simple_bind_s(who,cred)
# The class called LDAPObject will be used as default for
# ldap.open() and ldap.initialize()
LDAPObject = SimpleLDAPObject
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