python类open()的实例源码

def open(host,port=389,trace_level=0,trace_file=sys.stdout,trace_stack_limit=None,bytes_mode=None):
  """
  Return LDAPObject instance by opening LDAP connection to
  specified LDAP host

  Parameters:
  host
        LDAP host and port, e.g. localhost
  port
        integer specifying the port number to use, e.g. 389
  trace_level
        If non-zero a trace output of LDAP calls is generated.
  trace_file
        File object where to write the trace output to.
        Default is to use stdout.
  bytes_mode
        Whether to enable "bytes_mode" for backwards compatibility under Py2.
  """
  import warnings
  warnings.warn('ldap.open() is deprecated! Use ldap.initialize() instead.', DeprecationWarning,2)
  return initialize('ldap://%s:%d' % (host,port),trace_level,trace_file,trace_stack_limit,bytes_mode)

def __init__(self,ldap_host=None,base_dn=None,user=None,password=None):
        if not ldap_host:
            ldap_host = LDAP_HOST
        if not base_dn:
            self.base_dn = BASE_DN
        if not user:
            user = USER
        if not password:
            password = PASSWORD
        try:
            self.ldapconn = ldap.open(ldap_host)
            self.ldapconn.simple_bind(user,password)
        except ldap.LDAPError,e:
            print e

#?????????????????dn,??dn??????????????
#?ldap???cn=username,ou=users,dc=gccmx,dc=cn,??????????????DN

def whoami_s(self,*args,**kwargs):
    return self._apply_method_s(SimpleLDAPObject.whoami_s,*args,**kwargs)


# The class called LDAPObject will be used as default for
# ldap.open() and ldap.initialize()

def open_ldap():
    """
    Returns a freshly made LDAP object, according to the settings
    configured in webfront.conf.
    """
    # Get config settings
    server = _config.get('ldap', 'server')
    port = _config.getint('ldap', 'port')
    encryption = _config.get('ldap', 'encryption').lower()
    timeout = _config.getfloat('ldap', 'timeout')
    # Revert to no encryption if none of the valid settings are found
    if encryption not in ('ssl', 'tls', 'none'):
        _logger.warning('Unknown encryption setting %r in config file, '
                        'using no encryption instead',
                        _config.get('ldap', 'encryption'))
        encryption = 'none'

    # Debug tracing from python-ldap/openldap to stderr
    if _config.getboolean('ldap', 'debug'):
        ldap.set_option(ldap.OPT_DEBUG_LEVEL, 255)

    # Use STARTTLS if enabled, then fail miserably if the server
    # does not support it
    if encryption == 'tls':
        _logger.debug("Using STARTTLS for ldap connection")
        lconn = ldap.open(server, port)
        lconn.timeout = timeout
        try:
            lconn.start_tls_s()
        except ldap.PROTOCOL_ERROR:
            _logger.error('LDAP server %s does not support the STARTTLS '
                          'extension.  Aborting.', server)
            raise NoStartTlsError(server)
        except (ldap.SERVER_DOWN, ldap.CONNECT_ERROR):
            _logger.exception("LDAP server is down")
            raise NoAnswerError(server)
    else:
        scheme = encryption == 'ssl' and 'ldaps' or 'ldap'
        uri = '%s://%s:%s' % (scheme, server, port)
        lconn = ldap.initialize(uri)
        lconn.timeout = timeout

    return lconn