1#!/usr/bin/env python
2
3r"""
4See class prolog below for details.
5"""
6
7import sys
8import re
9from redfish_plus import redfish_plus
10from robot.libraries.BuiltIn import BuiltIn
11
12import func_args as fa
13import gen_print as gp
14
15
16class bmc_redfish(redfish_plus):
17    r"""
18    bmc_redfish is a child class of redfish_plus that is designed to provide
19    benefits specifically for using redfish to communicate with an OpenBMC.
20
21    See the prologs of the methods below for details.
22    """
23
24    def __init__(self, *args, **kwargs):
25        r"""
26        Do BMC-related redfish initialization.
27
28        Presently, older versions of BMC code may not support redfish
29        requests.  This can lead to unsightly error text being printed out for
30        programs that may use lib/bmc_redfish_resource.robot even though they
31        don't necessarily intend to make redfish requests.
32
33        This class method will make an attempt to tolerate this situation.  At
34        some future point, when all BMCs can be expected to support redfish,
35        this class method may be considered for deletion.  If it is deleted,
36        the self.__inited__ test code in the login() class method below should
37        likewise be deleted.
38        """
39        self.__inited__ = False
40        try:
41            super(bmc_redfish, self).__init__(*args, **kwargs)
42            self.__inited__ = True
43        except ValueError as get_exception:
44            except_type, except_value, except_traceback = sys.exc_info()
45            regex = r"The HTTP status code was not valid:[\r\n]+status:[ ]+502"
46            result = re.match(regex, str(except_value), flags=re.MULTILINE)
47            if not result:
48                gp.lprint_var(except_type)
49                gp.lprint_varx("except_value", str(except_value))
50                raise(get_exception)
51
52    def login(self, *args, **kwargs):
53        r"""
54        Assign BMC default values for username, password and auth arguments
55        and call parent class login method.
56
57        Description of argument(s):
58        args                        See parent class method prolog for details.
59        kwargs                      See parent class method prolog for details.
60        """
61
62        if not self.__inited__:
63            message = "bmc_redfish.__init__() was never successfully run.  It "
64            message += "is likely that the target BMC firmware code level "
65            message += "does not support redfish.\n"
66            raise ValueError(message)
67        # Assign default values for username, password, auth where necessary.
68        openbmc_username = BuiltIn().get_variable_value("${OPENBMC_USERNAME}")
69        openbmc_password = BuiltIn().get_variable_value("${OPENBMC_PASSWORD}")
70        username, args, kwargs = fa.pop_arg(openbmc_username, *args, **kwargs)
71        password, args, kwargs = fa.pop_arg(openbmc_password, *args, **kwargs)
72        auth, args, kwargs = fa.pop_arg('session', *args, **kwargs)
73
74        super(bmc_redfish, self).login(username, password, auth,
75                                       *args, **kwargs)
76
77    def get_properties(self, *args, **kwargs):
78        r"""
79        Return dictionary of attributes for a given path.
80
81        The difference between calling this function and calling get()
82        directly is that this function returns ONLY the dictionary portion of
83        the response object.
84
85        Example robot code:
86
87        ${properties}=  Get Properties  /redfish/v1/Systems/system/
88        Rprint Vars  properties
89
90        Output:
91
92        properties:
93          [PowerState]:      Off
94          [Processors]:
95            [@odata.id]:     /redfish/v1/Systems/system/Processors
96          [SerialNumber]:    1234567
97          ...
98
99        Description of argument(s):
100        args                        See parent class get() prolog for details.
101        kwargs                      See parent class get() prolog for details.
102        """
103
104        resp = self.get(*args, **kwargs)
105        return resp.dict if hasattr(resp, 'dict') else {}
106
107    def get_attribute(self, path, attribute, default=None, *args, **kwargs):
108        r"""
109        Get and return the named attribute from the properties for a given
110        path.
111
112        This method has the following advantages over calling get_properties
113        directly:
114        - The caller can specify a default value to be returned if the
115          attribute does not exist.
116
117        Example robot code:
118
119        ${attribute}=  Get Attribute  /redfish/v1/AccountService
120        ...  MaxPasswordLength  default=600
121        Rprint Vars  attribute
122
123        Output:
124
125        attribute:           31
126
127        Description of argument(s):
128        path                        The path (e.g.
129                                    "/redfish/v1/AccountService").
130        attribute                   The name of the attribute to be retrieved
131                                    (e.g. "MaxPasswordLength").
132        default                     The default value to be returned if the
133                                    attribute does not exist (e.g. "").
134        args                        See parent class get() prolog for details.
135        kwargs                      See parent class get() prolog for details.
136        """
137
138        return self.get_properties(path, *args, **kwargs).get(attribute,
139                                                              default)
140
141    def get_session_info(self):
142        r"""
143        Get and return session info as a tuple consisting of session_key and
144        session_location.
145        """
146
147        return self.get_session_key(), self.get_session_location()
148