4.6. Exceptions¶
The following exceptions are pywbem specific exceptions that can be raised at the WBEM client library API.
-
class
pywbem.
ConnectionError
(message, conn_id=None)[source]¶ This exception indicates a problem with the connection to the WBEM server. A retry may or may not succeed. Derived from
Error
.Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. Omitted or None if the error did not happen in context of any connection, or if the connection context was not known.
Variables: args – A tuple (message, ) set from the corresponding init arguments.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. Details
-
class
pywbem.
AuthError
(message, conn_id=None)[source]¶ This exception indicates an authentication error with the WBEM server, either during TLS/SSL handshake, or during HTTP-level authentication. Derived from
Error
.Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. Omitted or None if the error did not happen in context of any connection, or if the connection context was not known.
Variables: args – A tuple (message, ) set from the corresponding init arguments.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. Details
-
class
pywbem.
HTTPError
(status, reason, cimerror=None, cimdetails=None, conn_id=None, request_data=None, response_data=None)[source]¶ This exception indicates that the WBEM server returned an HTTP response with a bad HTTP status code. Derived from
Error
.The args instance variable is a tuple (status, reason, cimerror, cimdetails).
The message instance variable is not set.
Occurrence of this exception nearly always indicates an issue with the WBEM server.
Parameters: - status (integer) – HTTP status code (e.g. 500).
- reason (string) – HTTP reason phrase (e.g. “Internal Server Error”).
- cimerror (string) – Value of the CIMError HTTP header field, if present. None, otherwise.
- cimdetails (dict) –
Dictionary with CIMOM-specific header fields with details about the situation reported in the CIMError header field.
- Key: header field name (e.g. PGErrorDetail)
- Value: header field value (i.e. text message)
Passing None will result in an empty dictionary.
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. None if the error did not happen in context of any connection, or if the connection context was not known.
- request_data (string) – CIM-XML request string. None means the exception does not store a CIM-XML request.
- response_data (string) – CIM-XML response string. None means the exception does not store a CIM-XML response.
Variables: args – A tuple (status, reason, cimerror, cimdetails) set from the corresponding init arguments.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
cimdetails
CIMOM-specific details on the situation reported in the CIMError header field. cimerror
Value of CIMError HTTP header field in response, if present. conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. reason
HTTP reason phrase. request_data
CIM-XML request string (settable). response_data
CIM-XML response string (settable). status
HTTP status code. Details
-
status
¶ HTTP status code.
Example: 500
See RFC2616 for a list of HTTP status codes and reason phrases.
Type: integer
-
reason
¶ HTTP reason phrase.
Example: “Internal Server Error”
See RFC2616 for a list of HTTP status codes and reason phrases.
Type: string
-
class
pywbem.
TimeoutError
(message, conn_id=None)[source]¶ This exception indicates that the client timed out waiting for the WBEM server. Derived from
Error
.Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. Omitted or None if the error did not happen in context of any connection, or if the connection context was not known.
Variables: args – A tuple (message, ) set from the corresponding init arguments.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. Details
-
class
pywbem.
ParseError
(message, conn_id=None, request_data=None, response_data=None)[source]¶ This exception indicates a parsing error with the CIM-XML operation response the pywbem client received, or with the CIM-XML indication request the pywbem listener received.
Derived from
Error
.The CIM-XML response data is part of the str() representation of the exception.
This exception is a base class for more specific exceptions:
CIMXMLParseError
- Issue at the CIM-XML level (e.g. NAME attribute missing on CLASS element)XMLParseError
- Issue at the XML level (e.g. ill-formed XML)HeaderParseError
- Issue with HTTP headers (e.g. invalid content-type header)
Occurrence of this exception nearly always indicates an issue with the WBEM server.
Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. None if the error did not happen in context of any connection, or if the connection context was not known.
- request_data (string) – CIM-XML request string. None means the exception does not store a CIM-XML request.
- response_data (string) – CIM-XML response string. None means the exception does not store a CIM-XML response.
Variables: args – A tuple (message, ) set from the corresponding init argument.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. request_data
CIM-XML request string (settable). response_data
CIM-XML response string (settable). Details
-
class
pywbem.
CIMXMLParseError
(message, conn_id=None, request_data=None, response_data=None)[source]¶ This exception indicates a specific kind of
ParseError
that is an issue at the CIM-XML level.Example: ‘NAME’ attribute missing on ‘CLASS’ element.
Occurrence of this exception nearly always indicates an issue with the WBEM server.
Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. None if the error did not happen in context of any connection, or if the connection context was not known.
- request_data (string) – CIM-XML request string. None means the exception does not store a CIM-XML request.
- response_data (string) – CIM-XML response string. None means the exception does not store a CIM-XML response.
Variables: args – A tuple (message, ) set from the corresponding init argument.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. request_data
CIM-XML request string (settable). response_data
CIM-XML response string (settable). Details
-
class
pywbem.
XMLParseError
(message, conn_id=None, request_data=None, response_data=None)[source]¶ This exception indicates a specific kind of
ParseError
that is an issue at the XML level.Example: Ill-formed XML.
Occurrence of this exception nearly always indicates an issue with the WBEM server.
Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. None if the error did not happen in context of any connection, or if the connection context was not known.
- request_data (string) – CIM-XML request string. None means the exception does not store a CIM-XML request.
- response_data (string) – CIM-XML response string. None means the exception does not store a CIM-XML response.
Variables: args – A tuple (message, ) set from the corresponding init argument.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. request_data
CIM-XML request string (settable). response_data
CIM-XML response string (settable). Details
-
class
pywbem.
HeaderParseError
(message, conn_id=None, request_data=None, response_data=None)[source]¶ This exception indicates a specific kind of
ParseError
that is an issue with an HTTP header.Example: Invalid content-type.
Occurrence of this exception nearly always indicates an issue with the WBEM server.
Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. None if the error did not happen in context of any connection, or if the connection context was not known.
- request_data (string) – CIM-XML request string. None means the exception does not store a CIM-XML request.
- response_data (string) – CIM-XML response string. None means the exception does not store a CIM-XML response.
Variables: args – A tuple (message, ) set from the corresponding init argument.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. request_data
CIM-XML request string (settable). response_data
CIM-XML response string (settable). Details
-
class
pywbem.
CIMError
(status_code, status_description=None, instances=None, conn_id=None, request_data=None)[source]¶ This exception indicates that the WBEM server returned an error response with a CIM status code. Derived from
Error
.Accessing the CIM status code of a
CIMError
object:In Python 2, any
Exception
object can be accessed by index and slice and will delegate such access to itsargs
instance variable. In Python 3, that ability has been removed.In pywbem 0.9, the
status_code
andstatus_description
properties were added.Therefore, the following approach is not recommended, because it does not work on Python 3:
except CIMError as exc: status_code = exc[0]
The following approach works for pywbem 0.7 or newer:
except CIMError as exc: status_code = exc.args[0]
The following approach is recommended when using pywbem 0.9 or newer:
except CIMError as exc: status_code = exc.status_code
Parameters: - status_code (integer) – Numeric CIM status code.
- status_description (string) – CIM status description text returned by the server, representing a human readable message describing the error. None, if the server did not return a description text.
- instances (list of
CIMInstance
) – List of CIM instances returned by the WBEM server in the error response, that provide more details on the error. None if there are no such instances. - conn_id (connection id) – Connection ID of the connection in whose context the error happened. None if the error did not happen in context of any connection, or if the connection context was not known.
- request_data (string) – CIM-XML request string. None means the exception does not store a CIM-XML request.
Variables: args – A tuple (status_code, status_description, instances) set from the corresponding init arguments.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. instances
CIM instances returned by the WBEM server in the error response, that provide more details on the error. request_data
CIM-XML request string (settable). status_code
Numeric CIM status code. status_code_name
Symbolic name of the CIM status code. status_description
CIM status description text returned by the server, representing a human readable message describing the error. Details
-
status_code
¶ Numeric CIM status code.
New in pywbem 0.9.
Example: 5
See CIM status codes for constants defining the numeric CIM status code values.
Type: integer
-
status_code_name
¶ Symbolic name of the CIM status code.
Example: “CIM_ERR_INVALID_CLASS”
New in pywbem 0.9.
If the CIM status code is invalid, the string “Invalid status code <status_code>” is returned.
Type: string
-
status_description
¶ CIM status description text returned by the server, representing a human readable message describing the error.
New in pywbem 0.9.
Example: “The specified class does not exist.”
If the server did not return a description, a short default text for the CIM status code is returned. If the CIM status code is invalid, the string “Invalid status code <status_code>” is returned.
Type: string
-
instances
¶ CIM instances returned by the WBEM server in the error response, that provide more details on the error.
New in pywbem 0.13.
None if there are no such instances.
Type: List of CIMInstance
-
class
pywbem.
ModelError
(message, conn_id=None)[source]¶ This exception indicates an error with the model implemented by the WBEM server, that was detected by the pywbem client.
Examples are mismatches in data types of CIM elements (properties, methods, parameters) between classes and instances, CIM elements that appear in instances without being declared in classes, or violations of requirements defined in advertised management profiles.
Derived from
Error
.Parameters: - message (string) – Error message (will be put into args[0]).
- conn_id (connection id) – Connection ID of the connection in whose context the error happened. Omitted or None if the error did not happen in context of any connection, or if the connection context was not known.
Variables: args – A tuple (message, ) set from the corresponding init argument.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. Details
-
class
pywbem.
Error
(*args, **kwargs)[source]¶ Abstract base class for pywbem specific exceptions.
Parameters: - *args – Any other positional arguments are passed to
Exception
. - conn_id (connection id) – Connection ID of the connection in whose context the error happened. Omitted or None if the error did not happen in context of any connection, or if the connection context was not known. Must be specified as a keyword argument.
Methods
with_traceback
Exception.with_traceback(tb) – set self.__traceback__ to tb and return self. Attributes
args
conn_id
Connection ID of the connection in whose context the error happened. conn_str
String that identifies the connection in exception messages. Details
-
conn_id
¶ Connection ID of the connection in whose context the error happened.
None if the error did not happen in context of any connection, or if the connection context was not known.
Type: connection id
-
conn_str
¶ String that identifies the connection in exception messages.
Type: unicode string
- *args – Any other positional arguments are passed to
-
class
pywbem.
_RequestExceptionMixin
(*args, **kwargs)[source]¶ An internal mixin class for pywbem specific exceptions that provides the ability to store the CIM-XML request string in the exception.
New in pywbem 1.0.
Derived classes using this mixin class need to specify it before the base error class.
Parameters: - *args – Any other positional arguments are passed on to the next superclass.
- **kwargs – Any other keyword arguments are passed on to the next superclass.
- request_data (string) – CIM-XML request string. Omitted or None means the exception does not store a CIM-XML request. Must be specified as a keyword argument; if specified it will be removed from the keyword arguments that are passed on.
Methods
Attributes
request_data
CIM-XML request string (settable). Details
-
class
pywbem.
_ResponseExceptionMixin
(*args, **kwargs)[source]¶ Mixin class into pywbem specific exceptions that provides the ability to store the CIM-XML response string in the exception.
New in pywbem 1.0.
Derived classes using this mixin class need to specify it before the base error class.
Parameters: - *args – Any other positional arguments are passed on to the next superclass.
- **kwargs – Any other keyword arguments are passed on to the next superclass.
- response_data (string) – CIM-XML response string. Omitted or None means the exception does not store a CIM-XML response. Must be specified as a keyword argument; if specified it will be removed from the keyword arguments that are passed on.
Methods
Attributes
response_data
CIM-XML response string (settable). Details