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The API version the client sends can now be used to check what the client expects or is capable of. All version tests IPA does will be be named and listed in one module, ipalib.capabilities, which includes a function to test a specific capability against an API version. Similarly to Python's __future__ module, capabilities.py also serves as documentation of backwards-incompatible changes to the API. The first capability to be defined is "messages". Recent enough clients can accept a list of warnings or other info under the "messages" key in the result dict. If a JSON client does not send the API version, it is assumed this is a testing client (e.g. curl from the command line). Such a client "has" all capabilities, but it will always receive a warning mentioning that forward compatibility is not guaranteed. If a XML client does not send the API version, it is assumed it uses the API version before capabilities were introduced. (This is to keep backwards compatibility with clients containing bug https://fedorahosted.org/freeipa/ticket/3294) Whenever a capability is added, the API version must be incremented. To ensure that, capabilities are written to API.txt and checked by `makeapi --validate`. Design page: http://freeipa.org/page/V3/Messages Ticket: https://fedorahosted.org/freeipa/ticket/2732
1443 lines
51 KiB
Python
1443 lines
51 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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#
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# Copyright (C) 2008 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Base classes for all front-end plugins.
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"""
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import re
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import inspect
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from distutils import version
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from ipapython.version import API_VERSION
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from ipapython.ipa_log_manager import root_logger
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from base import lock, check_name, NameSpace
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from plugable import Plugin, is_production_mode
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from parameters import create_param, parse_param_spec, Param, Str, Flag, Password
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from output import Output, Entry, ListOfEntries
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from text import _, ngettext
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from errors import (ZeroArgumentError, MaxArgumentError, OverlapError,
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RequiresRoot, VersionError, RequirementError, OptionError, InvocationError)
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from constants import TYPE_ERROR
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from ipalib import messages
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RULE_FLAG = 'validation_rule'
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def rule(obj):
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assert not hasattr(obj, RULE_FLAG)
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setattr(obj, RULE_FLAG, True)
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return obj
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def is_rule(obj):
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return callable(obj) and getattr(obj, RULE_FLAG, False) is True
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def entry_count(entry):
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"""
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Return the number of entries in an entry. This is primarly for the
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failed output parameter so we don't print empty values.
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We also use this to determine if a non-zero return value is needed.
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"""
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num_entries = 0
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for f in entry:
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if type(entry[f]) is dict:
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num_entries = num_entries + entry_count(entry[f])
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else:
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num_entries = num_entries + len(entry[f])
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return num_entries
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class HasParam(Plugin):
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"""
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Base class for plugins that have `Param` `NameSpace` attributes.
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Subclasses of `HasParam` will on one or more attributes store `NameSpace`
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instances containing zero or more `Param` instances. These parameters might
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describe, for example, the arguments and options a command takes, or the
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attributes an LDAP entry can include, or whatever else the subclass sees
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fit.
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Although the interface a subclass must implement is very simple, it must
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conform to a specific naming convention: if you want a namespace
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``SubClass.foo``, you must define a ``Subclass.takes_foo`` attribute and a
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``SubCLass.get_foo()`` method, and you may optionally define a
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``SubClass.check_foo()`` method.
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A quick big-picture example
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===========================
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Say you want the ``options`` instance attribute on your subclass to be a
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`Param` `NameSpace`... then according to the enforced naming convention,
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your subclass must define a ``takes_options`` attribute and a
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``get_options()`` method. For example:
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>>> from ipalib import Str, Int
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>>> class Example(HasParam):
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...
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... options = None # This will be replaced with your namespace
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...
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... takes_options = (Str('one'), Int('two'))
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...
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... def get_options(self):
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... return self._get_param_iterable('options')
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...
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>>> eg = Example()
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The ``Example.takes_options`` attribute is a ``tuple`` defining the
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parameters you want your ``Example.options`` namespace to contain. Your
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``Example.takes_options`` attribute will be accessed via
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`HasParam._get_param_iterable()`, which, among other things, enforces the
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``('takes_' + name)`` naming convention. For example:
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>>> eg._get_param_iterable('options')
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(Str('one'), Int('two'))
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The ``Example.get_options()`` method simply returns
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``Example.takes_options`` by calling `HasParam._get_param_iterable()`. Your
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``Example.get_options()`` method will be called via
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`HasParam._filter_param_by_context()`, which, among other things, enforces
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the ``('get_' + name)`` naming convention. For example:
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>>> list(eg._filter_param_by_context('options'))
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[Str('one'), Int('two')]
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At this point, the ``eg.options`` instance attribute is still ``None``:
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>>> eg.options is None
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True
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`HasParam._create_param_namespace()` will create the ``eg.options``
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namespace from the parameters yielded by
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`HasParam._filter_param_by_context()`. For example:
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>>> eg._create_param_namespace('options')
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>>> eg.options
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NameSpace(<2 members>, sort=False)
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>>> list(eg.options) # Like dict.__iter__()
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['one', 'two']
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Your subclass can optionally define a ``check_options()`` method to perform
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sanity checks. If it exists, the ``check_options()`` method is called by
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`HasParam._create_param_namespace()` with a single value, the `NameSpace`
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instance it created. For example:
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>>> class Example2(Example):
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...
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... def check_options(self, namespace):
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... for param in namespace(): # Like dict.itervalues()
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... if param.name == 'three':
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... raise ValueError("I dislike the param 'three'")
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... print ' ** Looks good! **' # Note output below
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...
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>>> eg = Example2()
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>>> eg._create_param_namespace('options')
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** Looks good! **
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>>> eg.options
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NameSpace(<2 members>, sort=False)
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However, if we subclass again and add a `Param` named ``'three'``:
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>>> class Example3(Example2):
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...
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... takes_options = (Str('one'), Int('two'), Str('three'))
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...
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>>> eg = Example3()
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>>> eg._create_param_namespace('options')
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Traceback (most recent call last):
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...
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ValueError: I dislike the param 'three'
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>>> eg.options is None # eg.options was not set
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True
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The Devil and the details
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=========================
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In the above example, ``takes_options`` is a ``tuple``, but it can also be
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a param spec (see `create_param()`), or a callable that returns an iterable
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containing one or more param spec. Regardless of how ``takes_options`` is
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defined, `HasParam._get_param_iterable()` will return a uniform iterable,
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conveniently hiding the details.
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The above example uses the simplest ``get_options()`` method possible, but
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you could instead implement a ``get_options()`` method that would, for
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example, produce (or withhold) certain parameters based on the whether
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certain plugins are loaded.
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Think of ``takes_options`` as declarative, a simple definition of *what*
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parameters should be included in the namespace. You should only implement
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a ``takes_options()`` method if a `Param` must reference attributes on your
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plugin instance (for example, for validation rules); you should not use a
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``takes_options()`` method to filter the parameters or add any other
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procedural behaviour.
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On the other hand, think of the ``get_options()`` method as imperative, a
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procedure for *how* the parameters should be created and filtered. In the
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example above the *how* just returns the *what* unchanged, but arbitrary
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logic can be implemented in the ``get_options()`` method. For example, you
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might filter certain parameters from ``takes_options`` base on some
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criteria, or you might insert additional parameters provided by other
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plugins.
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The typical use case for using ``get_options()`` this way is to procedurally
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generate the arguments and options for all the CRUD commands operating on a
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specific LDAP object: the `Object` plugin defines the possible LDAP entry
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attributes (as `Param`), and then the CRUD commands intelligently build
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their ``args`` and ``options`` namespaces based on which attribute is the
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primary key. In this way new LDAP attributes (aka parameters) can be added
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to the single point of definition (the `Object` plugin), and all the
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corresponding CRUD commands pick up these new parameters without requiring
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modification. For an example of how this is done, see the
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`ipalib.crud.Create` base class.
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However, there is one type of filtering you should not implement in your
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``get_options()`` method, because it's already provided at a higher level:
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you should not filter parameters based on the value of ``api.env.context``
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nor (preferably) on any values in ``api.env``.
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`HasParam._filter_param_by_context()` already does this by calling
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`Param.use_in_context()` for each parameter. Although the base
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`Param.use_in_context()` implementation makes a decision solely on the value
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of ``api.env.context``, subclasses can override this with implementations
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that consider arbitrary ``api.env`` values.
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"""
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# HasParam is the base class for most frontend plugins, that make it to users
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# This flag indicates that the command should not be available in the cli
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NO_CLI = False
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def _get_param_iterable(self, name, verb='takes'):
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"""
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Return an iterable of params defined by the attribute named ``name``.
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A sequence of params can be defined one of three ways: as a ``tuple``;
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as a callable that returns an iterable; or as a param spec (a `Param` or
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``str`` instance). This method returns a uniform iterable regardless of
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how the param sequence was defined.
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For example, when defined with a tuple:
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>>> class ByTuple(HasParam):
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... takes_args = (Param('foo'), Param('bar'))
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...
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>>> by_tuple = ByTuple()
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>>> list(by_tuple._get_param_iterable('args'))
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[Param('foo'), Param('bar')]
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Or you can define your param sequence with a callable when you need to
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reference attributes on your plugin instance (for validation rules,
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etc.). For example:
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>>> class ByCallable(HasParam):
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... def takes_args(self):
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... yield Param('foo', self.validate_foo)
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... yield Param('bar', self.validate_bar)
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...
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... def validate_foo(self, _, value, **kw):
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... if value != 'Foo':
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... return _("must be 'Foo'")
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...
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... def validate_bar(self, _, value, **kw):
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... if value != 'Bar':
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... return _("must be 'Bar'")
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...
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>>> by_callable = ByCallable()
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>>> list(by_callable._get_param_iterable('args'))
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[Param('foo', validate_foo), Param('bar', validate_bar)]
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Lastly, as a convenience for when a param sequence contains a single
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param, your defining attribute may a param spec (either a `Param`
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or an ``str`` instance). For example:
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>>> class BySpec(HasParam):
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... takes_args = Param('foo')
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... takes_options = 'bar?'
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...
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>>> by_spec = BySpec()
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>>> list(by_spec._get_param_iterable('args'))
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[Param('foo')]
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>>> list(by_spec._get_param_iterable('options'))
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['bar?']
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For information on how an ``str`` param spec is interpreted, see the
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`create_param()` and `parse_param_spec()` functions in the
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`ipalib.parameters` module.
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Also see `HasParam._filter_param_by_context()`.
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"""
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src_name = verb + '_' + name
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src = getattr(self, src_name, None)
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if type(src) is tuple:
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return src
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if isinstance(src, (Param, str)):
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return (src,)
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if callable(src):
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return src()
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if src is None:
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return tuple()
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raise TypeError(
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'%s.%s must be a tuple, callable, or spec; got %r' % (
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self.name, src_name, src
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)
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)
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def _filter_param_by_context(self, name, env=None):
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"""
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Filter params on attribute named ``name`` by environment ``env``.
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For example:
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>>> from ipalib.config import Env
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>>> class Example(HasParam):
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...
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... takes_args = (
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... Str('foo_only', include=['foo']),
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... Str('not_bar', exclude=['bar']),
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... 'both',
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... )
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...
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... def get_args(self):
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... return self._get_param_iterable('args')
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...
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...
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>>> eg = Example()
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>>> foo = Env(context='foo')
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>>> bar = Env(context='bar')
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>>> another = Env(context='another')
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>>> (foo.context, bar.context, another.context)
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(u'foo', u'bar', u'another')
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>>> list(eg._filter_param_by_context('args', foo))
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[Str('foo_only', include=['foo']), Str('not_bar', exclude=['bar']), Str('both')]
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>>> list(eg._filter_param_by_context('args', bar))
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[Str('both')]
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>>> list(eg._filter_param_by_context('args', another))
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[Str('not_bar', exclude=['bar']), Str('both')]
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"""
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env = getattr(self, 'env', env)
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get_name = 'get_' + name
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if not hasattr(self, get_name):
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raise NotImplementedError(
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'%s.%s()' % (self.name, get_name)
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)
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get = getattr(self, get_name)
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if not callable(get):
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raise TypeError(
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'%s.%s must be a callable; got %r' % (self.name, get_name, get)
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)
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for spec in get():
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param = create_param(spec)
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if env is None or param.use_in_context(env):
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if env is not None and not hasattr(param, 'env'):
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# Force specified environment. The way it is done is violation of ReadOnly promise.
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# Unfortunately, all alternatives are worse from both performance and code complexity
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# points of view. See following threads on freeipa-devel@ for references:
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# https://www.redhat.com/archives/freeipa-devel/2011-August/msg00000.html
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# https://www.redhat.com/archives/freeipa-devel/2011-August/msg00011.html
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object.__setattr__(param, 'env', env)
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yield param
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def _create_param_namespace(self, name, env=None):
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namespace = NameSpace(
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self._filter_param_by_context(name, env),
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sort=False
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)
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if not is_production_mode(self):
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check = getattr(self, 'check_' + name, None)
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if callable(check):
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check(namespace)
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setattr(self, name, namespace)
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class Command(HasParam):
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"""
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A public IPA atomic operation.
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All plugins that subclass from `Command` will be automatically available
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as a CLI command and as an XML-RPC method.
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Plugins that subclass from Command are registered in the ``api.Command``
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namespace. For example:
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>>> from ipalib import create_api
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>>> api = create_api()
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>>> class my_command(Command):
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... pass
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...
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>>> api.register(my_command)
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>>> api.finalize()
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>>> list(api.Command)
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['my_command']
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>>> api.Command.my_command # doctest:+ELLIPSIS
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ipalib.frontend.my_command()
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"""
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finalize_early = False
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takes_options = tuple()
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takes_args = tuple()
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# Create stubs for attributes that are set in _on_finalize()
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args = Plugin.finalize_attr('args')
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options = Plugin.finalize_attr('options')
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params = Plugin.finalize_attr('params')
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params_by_default = Plugin.finalize_attr('params_by_default')
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obj = None
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use_output_validation = True
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output = Plugin.finalize_attr('output')
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has_output = ('result',)
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output_params = Plugin.finalize_attr('output_params')
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has_output_params = tuple()
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internal_options = tuple()
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msg_summary = None
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msg_truncated = _('Results are truncated, try a more specific search')
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def __call__(self, *args, **options):
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"""
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Perform validation and then execute the command.
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If not in a server context, the call will be forwarded over
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XML-RPC and the executed an the nearest IPA server.
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"""
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self.ensure_finalized()
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params = self.args_options_2_params(*args, **options)
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self.debug(
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'raw: %s(%s)', self.name, ', '.join(self._repr_iter(**params))
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)
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params.update(self.get_default(**params))
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params = self.normalize(**params)
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params = self.convert(**params)
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self.debug(
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'%s(%s)', self.name, ', '.join(self._repr_iter(**params))
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)
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if not self.api.env.in_server and 'version' not in params:
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params['version'] = API_VERSION
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self.validate(**params)
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(args, options) = self.params_2_args_options(**params)
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ret = self.run(*args, **options)
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if (
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isinstance(ret, dict)
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and 'summary' in self.output
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and 'summary' not in ret
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):
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if self.msg_summary:
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ret['summary'] = self.msg_summary % ret
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else:
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ret['summary'] = None
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if self.use_output_validation and (self.output or ret is not None):
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self.validate_output(ret)
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return ret
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|
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def soft_validate(self, values):
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errors = dict()
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for p in self.params():
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try:
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value = values.get(p.name)
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values[p.name] = p(value, **values)
|
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except InvocationError, e:
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errors[p.name] = str(e)
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return dict(
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values=values,
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errors=errors,
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)
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|
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def _repr_iter(self, **params):
|
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"""
|
|
Iterate through ``repr()`` of *safe* values of args and options.
|
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|
|
This method uses `parameters.Param.safe_value()` to mask passwords when
|
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logging. Logging the exact call is extremely useful, but we obviously
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don't want to log the cleartext password.
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|
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For example:
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|
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>>> class my_cmd(Command):
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... takes_args = ('login',)
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... takes_options=(Password('passwd'),)
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...
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>>> c = my_cmd()
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>>> c.finalize()
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>>> list(c._repr_iter(login=u'Okay.', passwd=u'Private!'))
|
|
["u'Okay.'", "passwd=u'********'"]
|
|
"""
|
|
for arg in self.args():
|
|
value = params.get(arg.name, None)
|
|
yield repr(arg.safe_value(value))
|
|
for option in self.options():
|
|
if option.name not in params:
|
|
continue
|
|
value = params[option.name]
|
|
yield '%s=%r' % (option.name, option.safe_value(value))
|
|
|
|
def args_options_2_params(self, *args, **options):
|
|
"""
|
|
Merge (args, options) into params.
|
|
"""
|
|
if self.max_args is not None and len(args) > self.max_args:
|
|
if self.max_args == 0:
|
|
raise ZeroArgumentError(name=self.name)
|
|
raise MaxArgumentError(name=self.name, count=self.max_args)
|
|
params = dict(self.__options_2_params(options))
|
|
if len(args) > 0:
|
|
arg_kw = dict(self.__args_2_params(args))
|
|
intersection = set(arg_kw).intersection(params)
|
|
if len(intersection) > 0:
|
|
raise OverlapError(names=sorted(intersection))
|
|
params.update(arg_kw)
|
|
return params
|
|
|
|
def __args_2_params(self, values):
|
|
multivalue = False
|
|
for (i, arg) in enumerate(self.args()):
|
|
assert not multivalue
|
|
if len(values) > i:
|
|
if arg.multivalue:
|
|
multivalue = True
|
|
if len(values) == i + 1 and type(values[i]) in (list, tuple):
|
|
yield (arg.name, values[i])
|
|
else:
|
|
yield (arg.name, values[i:])
|
|
else:
|
|
yield (arg.name, values[i])
|
|
else:
|
|
break
|
|
|
|
def __options_2_params(self, options):
|
|
for name in self.params:
|
|
if name in options:
|
|
yield (name, options.pop(name))
|
|
# If any options remain, they are either internal or unknown
|
|
unused_keys = set(options).difference(self.internal_options)
|
|
if unused_keys:
|
|
raise OptionError(_('Unknown option: %(option)s'),
|
|
option=unused_keys.pop())
|
|
|
|
def args_options_2_entry(self, *args, **options):
|
|
"""
|
|
Creates a LDAP entry from attributes in args and options.
|
|
"""
|
|
kw = self.args_options_2_params(*args, **options)
|
|
return dict(self.__attributes_2_entry(kw))
|
|
|
|
def __attributes_2_entry(self, kw):
|
|
for name in self.params:
|
|
if self.params[name].attribute and name in kw:
|
|
value = kw[name]
|
|
if isinstance(value, tuple):
|
|
yield (name, [v for v in value])
|
|
else:
|
|
yield (name, kw[name])
|
|
|
|
def params_2_args_options(self, **params):
|
|
"""
|
|
Split params into (args, options).
|
|
"""
|
|
args = tuple(params.get(name, None) for name in self.args)
|
|
options = dict(self.__params_2_options(params))
|
|
return (args, options)
|
|
|
|
def __params_2_options(self, params):
|
|
for name in self.options:
|
|
if name in params:
|
|
yield(name, params[name])
|
|
|
|
def split_csv(self, **kw):
|
|
"""
|
|
Return a dictionary of values where values are decoded from CSV.
|
|
|
|
For example:
|
|
|
|
>>> class my_command(Command):
|
|
... takes_options = (
|
|
... Param('flags', multivalue=True, csv=True),
|
|
... )
|
|
...
|
|
>>> c = my_command()
|
|
>>> c.finalize()
|
|
>>> c.split_csv(flags=u'public,replicated')
|
|
{'flags': (u'public', u'replicated')}
|
|
"""
|
|
return dict(
|
|
(k, self.params[k].split_csv(v)) for (k, v) in kw.iteritems()
|
|
)
|
|
|
|
def normalize(self, **kw):
|
|
"""
|
|
Return a dictionary of normalized values.
|
|
|
|
For example:
|
|
|
|
>>> class my_command(Command):
|
|
... takes_options = (
|
|
... Param('first', normalizer=lambda value: value.lower()),
|
|
... Param('last'),
|
|
... )
|
|
...
|
|
>>> c = my_command()
|
|
>>> c.finalize()
|
|
>>> c.normalize(first=u'JOHN', last=u'DOE')
|
|
{'last': u'DOE', 'first': u'john'}
|
|
"""
|
|
return dict(
|
|
(k, self.params[k].normalize(v)) for (k, v) in kw.iteritems()
|
|
)
|
|
|
|
def convert(self, **kw):
|
|
"""
|
|
Return a dictionary of values converted to correct type.
|
|
|
|
>>> from ipalib import Int
|
|
>>> class my_command(Command):
|
|
... takes_args = (
|
|
... Int('one'),
|
|
... 'two',
|
|
... )
|
|
...
|
|
>>> c = my_command()
|
|
>>> c.finalize()
|
|
>>> c.convert(one=1, two=2)
|
|
{'two': u'2', 'one': 1}
|
|
"""
|
|
return dict(
|
|
(k, self.params[k].convert(v)) for (k, v) in kw.iteritems()
|
|
)
|
|
|
|
def __convert_iter(self, kw):
|
|
for param in self.params():
|
|
if kw.get(param.name, None) is None:
|
|
continue
|
|
|
|
def get_default(self, **kw):
|
|
"""
|
|
Return a dictionary of defaults for all missing required values.
|
|
|
|
For example:
|
|
|
|
>>> from ipalib import Str
|
|
>>> class my_command(Command):
|
|
... takes_args = Str('color', default=u'Red')
|
|
...
|
|
>>> c = my_command()
|
|
>>> c.finalize()
|
|
>>> c.get_default()
|
|
{'color': u'Red'}
|
|
>>> c.get_default(color=u'Yellow')
|
|
{}
|
|
"""
|
|
params = [p.name for p in self.params() if p.name not in kw and (p.required or p.autofill)]
|
|
return dict(self.__get_default_iter(params, kw))
|
|
|
|
def get_default_of(self, name, **kw):
|
|
"""
|
|
Return default value for parameter `name`.
|
|
"""
|
|
default = dict(self.__get_default_iter([name], kw))
|
|
return default.get(name)
|
|
|
|
def __get_default_iter(self, params, kw):
|
|
"""
|
|
Generator method used by `Command.get_default` and `Command.get_default_of`.
|
|
"""
|
|
# Find out what additional parameters are needed to dynamically create
|
|
# the default values with default_from.
|
|
dep = set()
|
|
for param in reversed(self.params_by_default):
|
|
if param.name in params or param.name in dep:
|
|
if param.default_from is None:
|
|
continue
|
|
for name in param.default_from.keys:
|
|
dep.add(name)
|
|
|
|
for param in self.params_by_default():
|
|
default = None
|
|
hasdefault = False
|
|
if param.name in dep:
|
|
if param.name in kw:
|
|
# Parameter is specified, convert and validate the value.
|
|
kw[param.name] = param(kw[param.name], **kw)
|
|
else:
|
|
# Parameter is not specified, use default value. Convert
|
|
# and validate the value, it might not be returned so
|
|
# there's no guarantee it will be converted and validated
|
|
# later.
|
|
default = param(None, **kw)
|
|
if default is not None:
|
|
kw[param.name] = default
|
|
hasdefault = True
|
|
if param.name in params:
|
|
if not hasdefault:
|
|
# Default value is not available from the previous step,
|
|
# get it now. At this point it is certain that the value
|
|
# will be returned, so let the caller care about conversion
|
|
# and validation.
|
|
default = param.get_default(**kw)
|
|
if default is not None:
|
|
yield (param.name, default)
|
|
|
|
def validate(self, **kw):
|
|
"""
|
|
Validate all values.
|
|
|
|
If any value fails the validation, `ipalib.errors.ValidationError`
|
|
(or a subclass thereof) will be raised.
|
|
"""
|
|
for param in self.params():
|
|
value = kw.get(param.name, None)
|
|
param.validate(value, self.env.context, supplied=param.name in kw)
|
|
|
|
def verify_client_version(self, client_version):
|
|
"""
|
|
Compare the version the client provided to the version of the
|
|
server.
|
|
|
|
If the client major version does not match then return an error.
|
|
If the client minor version is less than or equal to the server
|
|
then let the request proceed.
|
|
"""
|
|
server_ver = version.LooseVersion(API_VERSION)
|
|
ver = version.LooseVersion(client_version)
|
|
if len(ver.version) < 2:
|
|
raise VersionError(cver=ver.version, sver=server_ver.version, server= self.env.xmlrpc_uri)
|
|
client_major = ver.version[0]
|
|
client_minor = ver.version[1]
|
|
|
|
server_major = server_ver.version[0]
|
|
server_minor = server_ver.version[1]
|
|
|
|
if server_major != client_major:
|
|
raise VersionError(cver=client_version, sver=API_VERSION, server=self.env.xmlrpc_uri)
|
|
if client_minor > server_minor:
|
|
raise VersionError(cver=client_version, sver=API_VERSION, server=self.env.xmlrpc_uri)
|
|
|
|
def run(self, *args, **options):
|
|
"""
|
|
Dispatch to `Command.execute` or `Command.forward`.
|
|
|
|
If running in a server context, `Command.execute` is called and the
|
|
actually work this command performs is executed locally.
|
|
|
|
If running in a non-server context, `Command.forward` is called,
|
|
which forwards this call over XML-RPC to the exact same command
|
|
on the nearest IPA server and the actual work this command
|
|
performs is executed remotely.
|
|
"""
|
|
if self.api.env.in_server:
|
|
version_provided = 'version' in options
|
|
if version_provided:
|
|
self.verify_client_version(options['version'])
|
|
else:
|
|
options['version'] = API_VERSION
|
|
result = self.execute(*args, **options)
|
|
if not version_provided:
|
|
messages.add_message(
|
|
API_VERSION, result,
|
|
messages.VersionMissing(server_version=API_VERSION))
|
|
return result
|
|
return self.forward(*args, **options)
|
|
|
|
def execute(self, *args, **kw):
|
|
"""
|
|
Perform the actual work this command does.
|
|
|
|
This method should be implemented only against functionality
|
|
in self.api.Backend. For example, a hypothetical
|
|
user_add.execute() might be implemented like this:
|
|
|
|
>>> class user_add(Command):
|
|
... def execute(self, **kw):
|
|
... return self.api.Backend.ldap.add(**kw)
|
|
...
|
|
"""
|
|
raise NotImplementedError('%s.execute()' % self.name)
|
|
|
|
def forward(self, *args, **kw):
|
|
"""
|
|
Forward call over XML-RPC to this same command on server.
|
|
"""
|
|
return self.Backend.xmlclient.forward(self.name, *args, **kw)
|
|
|
|
def _on_finalize(self):
|
|
"""
|
|
Finalize plugin initialization.
|
|
|
|
This method creates the ``args``, ``options``, and ``params``
|
|
namespaces. This is not done in `Command.__init__` because
|
|
subclasses (like `crud.Add`) might need to access other plugins
|
|
loaded in self.api to determine what their custom `Command.get_args`
|
|
and `Command.get_options` methods should yield.
|
|
"""
|
|
self._create_param_namespace('args')
|
|
if len(self.args) == 0 or not self.args[-1].multivalue:
|
|
self.max_args = len(self.args)
|
|
else:
|
|
self.max_args = None
|
|
self._create_param_namespace('options')
|
|
params_nosort = tuple(self.args()) + tuple(self.options())
|
|
def get_key(p):
|
|
if p.required:
|
|
if p.sortorder < 0:
|
|
return p.sortorder
|
|
if p.default_from is None:
|
|
return 0
|
|
return 1
|
|
return 2
|
|
self.params = NameSpace(
|
|
sorted(params_nosort, key=get_key),
|
|
sort=False
|
|
)
|
|
# Sort params so that the ones with default_from come after the ones
|
|
# that the default_from might depend on and save the result in
|
|
# params_by_default namespace.
|
|
params = []
|
|
for i in params_nosort:
|
|
pos = len(params)
|
|
for j in params_nosort:
|
|
if j.default_from is None:
|
|
continue
|
|
if i.name not in j.default_from.keys:
|
|
continue
|
|
try:
|
|
pos = min(pos, params.index(j))
|
|
except ValueError:
|
|
pass
|
|
params.insert(pos, i)
|
|
self.params_by_default = NameSpace(params, sort=False)
|
|
self.output = NameSpace(self._iter_output(), sort=False)
|
|
self._create_param_namespace('output_params')
|
|
super(Command, self)._on_finalize()
|
|
|
|
def _iter_output(self):
|
|
if type(self.has_output) is not tuple:
|
|
raise TypeError('%s.has_output: need a %r; got a %r: %r' % (
|
|
self.name, tuple, type(self.has_output), self.has_output)
|
|
)
|
|
for (i, o) in enumerate(self.has_output):
|
|
if isinstance(o, str):
|
|
o = Output(o)
|
|
if not isinstance(o, Output):
|
|
raise TypeError('%s.has_output[%d]: need a %r; got a %r: %r' % (
|
|
self.name, i, (str, Output), type(o), o)
|
|
)
|
|
yield o
|
|
|
|
def get_args(self):
|
|
"""
|
|
Iterate through parameters for ``Command.args`` namespace.
|
|
|
|
This method gets called by `HasParam._create_param_namespace()`.
|
|
|
|
Subclasses can override this to customize how the arguments are
|
|
determined. For an example of why this can be useful, see the
|
|
`ipalib.crud.Create` subclass.
|
|
"""
|
|
for arg in self._get_param_iterable('args'):
|
|
yield arg
|
|
|
|
def check_args(self, args):
|
|
"""
|
|
Sanity test for args namespace.
|
|
|
|
This method gets called by `HasParam._create_param_namespace()`.
|
|
"""
|
|
optional = False
|
|
multivalue = False
|
|
for arg in args():
|
|
if optional and arg.required:
|
|
raise ValueError(
|
|
'%s: required argument after optional' % arg.name
|
|
)
|
|
if multivalue:
|
|
raise ValueError(
|
|
'%s: only final argument can be multivalue' % arg.name
|
|
)
|
|
if not arg.required:
|
|
optional = True
|
|
if arg.multivalue:
|
|
multivalue = True
|
|
|
|
def get_options(self):
|
|
"""
|
|
Iterate through parameters for ``Command.options`` namespace.
|
|
|
|
This method gets called by `HasParam._create_param_namespace()`.
|
|
|
|
For commands that return entries two special options are generated:
|
|
--all makes the command retrieve/display all attributes
|
|
--raw makes the command display attributes as they are stored
|
|
|
|
Subclasses can override this to customize how the arguments are
|
|
determined. For an example of why this can be useful, see the
|
|
`ipalib.crud.Create` subclass.
|
|
"""
|
|
for option in self._get_param_iterable('options'):
|
|
yield option
|
|
for o in self.has_output:
|
|
if isinstance(o, (Entry, ListOfEntries)):
|
|
yield Flag('all',
|
|
cli_name='all',
|
|
doc=_('Retrieve and print all attributes from the server. Affects command output.'),
|
|
exclude='webui',
|
|
flags=['no_output'],
|
|
)
|
|
yield Flag('raw',
|
|
cli_name='raw',
|
|
doc=_('Print entries as stored on the server. Only affects output format.'),
|
|
exclude='webui',
|
|
flags=['no_output'],
|
|
)
|
|
break
|
|
yield Str('version?',
|
|
doc=_('Client version. Used to determine if server will accept request.'),
|
|
exclude='webui',
|
|
flags=['no_option', 'no_output'],
|
|
)
|
|
|
|
def validate_output(self, output):
|
|
"""
|
|
Validate the return value to make sure it meets the interface contract.
|
|
"""
|
|
nice = '%s.validate_output()' % self.name
|
|
if not isinstance(output, dict):
|
|
raise TypeError('%s: need a %r; got a %r: %r' % (
|
|
nice, dict, type(output), output)
|
|
)
|
|
expected_set = set(self.output)
|
|
actual_set = set(output) - set(['messages'])
|
|
if expected_set != actual_set:
|
|
missing = expected_set - actual_set
|
|
if missing:
|
|
raise ValueError('%s: missing keys %r in %r' % (
|
|
nice, sorted(missing), output)
|
|
)
|
|
extra = actual_set - expected_set
|
|
if extra:
|
|
raise ValueError('%s: unexpected keys %r in %r' % (
|
|
nice, sorted(extra), output)
|
|
)
|
|
for o in self.output():
|
|
value = output[o.name]
|
|
if not (o.type is None or isinstance(value, o.type)):
|
|
raise TypeError('%s:\n output[%r]: need %r; got %r: %r' % (
|
|
nice, o.name, o.type, type(value), value)
|
|
)
|
|
if callable(o.validate):
|
|
o.validate(self, value)
|
|
|
|
def get_output_params(self):
|
|
for param in self._get_param_iterable('output_params', verb='has'):
|
|
yield param
|
|
if self.params is None:
|
|
return
|
|
for param in self.params():
|
|
if 'no_output' in param.flags:
|
|
continue
|
|
yield param
|
|
|
|
def log_messages(self, output, logger):
|
|
logger_functions = dict(
|
|
debug=logger.debug,
|
|
info=logger.info,
|
|
warning=logger.warning,
|
|
error=logger.error,
|
|
)
|
|
for message in output.get('messages', ()):
|
|
try:
|
|
function = logger_functions[message['type']]
|
|
except KeyError:
|
|
logger.error('Server sent a message with a wrong type')
|
|
function = logger.error
|
|
function(message.get('message'))
|
|
|
|
def output_for_cli(self, textui, output, *args, **options):
|
|
"""
|
|
Generic output method. Prints values the output argument according
|
|
to their type and self.output.
|
|
|
|
Entry attributes are labeled and printed in the order specified in
|
|
self.output_params. Attributes that aren't present in
|
|
self.output_params are not printed unless the command was invokend
|
|
with the --all option. Attribute labelling is disabled if the --raw
|
|
option was given.
|
|
|
|
Subclasses can override this method, if custom output is needed.
|
|
"""
|
|
if not isinstance(output, dict):
|
|
return
|
|
|
|
rv = 0
|
|
|
|
self.log_messages(output, root_logger)
|
|
|
|
order = [p.name for p in self.output_params()]
|
|
if options.get('all', False):
|
|
order.insert(0, 'dn')
|
|
print_all = True
|
|
else:
|
|
print_all = False
|
|
|
|
if options.get('raw', False):
|
|
labels = None
|
|
else:
|
|
labels = dict((p.name, unicode(p.label)) for p in self.output_params())
|
|
flags = dict((p.name, p.flags) for p in self.output_params())
|
|
|
|
for o in self.output:
|
|
outp = self.output[o]
|
|
if 'no_display' in outp.flags:
|
|
continue
|
|
result = output[o]
|
|
|
|
if o.lower() == 'count' and result == 0:
|
|
rv = 1
|
|
elif o.lower() == 'failed':
|
|
if entry_count(result) == 0:
|
|
# Don't display an empty failed list
|
|
continue
|
|
else:
|
|
# Return an error to the shell
|
|
rv = 1
|
|
if isinstance(outp, ListOfEntries):
|
|
textui.print_entries(result, order, labels, flags, print_all)
|
|
elif isinstance(result, (tuple, list)):
|
|
textui.print_entries(result, order, labels, flags, print_all)
|
|
elif isinstance(outp, Entry):
|
|
textui.print_entry(result, order, labels, flags, print_all)
|
|
elif isinstance(result, dict):
|
|
textui.print_entry(result, order, labels, flags, print_all)
|
|
elif isinstance(result, unicode):
|
|
if o == 'summary':
|
|
textui.print_summary(result)
|
|
else:
|
|
textui.print_indented(result)
|
|
elif isinstance(result, bool):
|
|
# the Delete commands return a boolean indicating
|
|
# success or failure. Ignore these.
|
|
pass
|
|
elif isinstance(result, int):
|
|
textui.print_count(result, '%s %%d' % unicode(self.output[o].doc))
|
|
|
|
return rv
|
|
|
|
# list of attributes we want exported to JSON
|
|
json_friendly_attributes = (
|
|
'name', 'takes_args',
|
|
)
|
|
|
|
# list of options we want only to mention their presence and not to write
|
|
# their attributes
|
|
json_only_presence_options = (
|
|
'all', 'raw', 'attrs', 'addattr', 'delattr', 'setattr', 'version',
|
|
)
|
|
|
|
def get_json_options(self):
|
|
"""
|
|
Get only options we want exported to JSON
|
|
"""
|
|
for option in self.get_options():
|
|
if option.name not in self.json_only_presence_options:
|
|
yield option
|
|
else:
|
|
yield { 'name': option.name }
|
|
|
|
def __json__(self):
|
|
json_dict = dict(
|
|
(a, getattr(self, a)) for a in self.json_friendly_attributes
|
|
)
|
|
|
|
json_dict['takes_options'] = list(self.get_json_options())
|
|
|
|
return json_dict
|
|
|
|
class LocalOrRemote(Command):
|
|
"""
|
|
A command that is explicitly executed locally or remotely.
|
|
|
|
This is for commands that makes sense to execute either locally or
|
|
remotely to return a perhaps different result. The best example of
|
|
this is the `ipalib.plugins.f_misc.env` plugin which returns the
|
|
key/value pairs describing the configuration state: it can be
|
|
"""
|
|
|
|
takes_options = (
|
|
Flag('server?',
|
|
doc=_('Forward to server instead of running locally'),
|
|
),
|
|
)
|
|
|
|
def run(self, *args, **options):
|
|
"""
|
|
Dispatch to forward() or execute() based on ``server`` option.
|
|
|
|
When running in a client context, this command is executed remotely if
|
|
``options['server']`` is true; otherwise it is executed locally.
|
|
|
|
When running in a server context, this command is always executed
|
|
locally and the value of ``options['server']`` is ignored.
|
|
"""
|
|
if options['server'] and not self.env.in_server:
|
|
return self.forward(*args, **options)
|
|
return self.execute(*args, **options)
|
|
|
|
|
|
class Local(Command):
|
|
"""
|
|
A command that is explicitly executed locally.
|
|
|
|
This is for commands that makes sense to execute only locally
|
|
such as the help command.
|
|
"""
|
|
|
|
def run(self, *args, **options):
|
|
"""
|
|
Dispatch to forward() onlly.
|
|
"""
|
|
return self.forward(*args, **options)
|
|
|
|
|
|
class Object(HasParam):
|
|
finalize_early = False
|
|
|
|
# Create stubs for attributes that are set in _on_finalize()
|
|
backend = Plugin.finalize_attr('backend')
|
|
methods = Plugin.finalize_attr('methods')
|
|
properties = Plugin.finalize_attr('properties')
|
|
params = Plugin.finalize_attr('params')
|
|
primary_key = Plugin.finalize_attr('primary_key')
|
|
params_minus_pk = Plugin.finalize_attr('params_minus_pk')
|
|
|
|
# Can override in subclasses:
|
|
backend_name = None
|
|
takes_params = tuple()
|
|
|
|
def _on_finalize(self):
|
|
self.methods = NameSpace(
|
|
self.__get_attrs('Method'), sort=False, name_attr='attr_name'
|
|
)
|
|
self.properties = NameSpace(
|
|
self.__get_attrs('Property'), sort=False, name_attr='attr_name'
|
|
)
|
|
self._create_param_namespace('params')
|
|
pkeys = filter(lambda p: p.primary_key, self.params())
|
|
if len(pkeys) > 1:
|
|
raise ValueError(
|
|
'%s (Object) has multiple primary keys: %s' % (
|
|
self.name,
|
|
', '.join(p.name for p in pkeys),
|
|
)
|
|
)
|
|
if len(pkeys) == 1:
|
|
self.primary_key = pkeys[0]
|
|
self.params_minus_pk = NameSpace(
|
|
filter(lambda p: not p.primary_key, self.params()), sort=False
|
|
)
|
|
else:
|
|
self.primary_key = None
|
|
self.params_minus_pk = self.params
|
|
|
|
if 'Backend' in self.api and self.backend_name in self.api.Backend:
|
|
self.backend = self.api.Backend[self.backend_name]
|
|
|
|
super(Object, self)._on_finalize()
|
|
|
|
def params_minus(self, *names):
|
|
"""
|
|
Yield all Param whose name is not in ``names``.
|
|
"""
|
|
if len(names) == 1 and not isinstance(names[0], (Param, str)):
|
|
names = names[0]
|
|
minus = frozenset(names)
|
|
for param in self.params():
|
|
if param.name in minus or param in minus:
|
|
continue
|
|
yield param
|
|
|
|
def get_dn(self, *args, **kwargs):
|
|
"""
|
|
Construct an LDAP DN.
|
|
"""
|
|
raise NotImplementedError('%s.get_dn()' % self.name)
|
|
|
|
def __get_attrs(self, name):
|
|
if name not in self.api:
|
|
return
|
|
namespace = self.api[name]
|
|
assert type(namespace) is NameSpace
|
|
for plugin in namespace(): # Equivalent to dict.itervalues()
|
|
if plugin.obj_name == self.name:
|
|
yield plugin
|
|
|
|
def get_params(self):
|
|
"""
|
|
This method gets called by `HasParam._create_param_namespace()`.
|
|
"""
|
|
props = self.properties.__todict__()
|
|
for spec in self._get_param_iterable('params'):
|
|
if type(spec) is str:
|
|
key = spec.rstrip('?*+')
|
|
else:
|
|
assert isinstance(spec, Param)
|
|
key = spec.name
|
|
if key in props:
|
|
yield props.pop(key).param
|
|
else:
|
|
yield create_param(spec)
|
|
def get_key(p):
|
|
if p.param.required:
|
|
if p.param.default_from is None:
|
|
return 0
|
|
return 1
|
|
return 2
|
|
for prop in sorted(props.itervalues(), key=get_key):
|
|
yield prop.param
|
|
|
|
|
|
class Attribute(Plugin):
|
|
"""
|
|
Base class implementing the attribute-to-object association.
|
|
|
|
`Attribute` plugins are associated with an `Object` plugin to group
|
|
a common set of commands that operate on a common set of parameters.
|
|
|
|
The association between attribute and object is done using a simple
|
|
naming convention: the first part of the plugin class name (up to the
|
|
first underscore) is the object name, and rest is the attribute name,
|
|
as this table shows:
|
|
|
|
=============== =========== ==============
|
|
Class name Object name Attribute name
|
|
=============== =========== ==============
|
|
noun_verb noun verb
|
|
user_add user add
|
|
user_first_name user first_name
|
|
=============== =========== ==============
|
|
|
|
For example:
|
|
|
|
>>> class user_add(Attribute):
|
|
... pass
|
|
...
|
|
>>> instance = user_add()
|
|
>>> instance.obj_name
|
|
'user'
|
|
>>> instance.attr_name
|
|
'add'
|
|
|
|
In practice the `Attribute` class is not used directly, but rather is
|
|
only the base class for the `Method` and `Property` classes. Also see
|
|
the `Object` class.
|
|
"""
|
|
finalize_early = False
|
|
|
|
NAME_REGEX = re.compile(
|
|
'^(?P<obj>[a-z][a-z0-9]+)_(?P<attr>[a-z][a-z0-9]+(?:_[a-z][a-z0-9]+)*)$'
|
|
)
|
|
|
|
# Create stubs for attributes that are set in _on_finalize()
|
|
__obj = Plugin.finalize_attr('_Attribute__obj')
|
|
|
|
def __init__(self):
|
|
m = self.NAME_REGEX.match(type(self).__name__)
|
|
assert m
|
|
self.__obj_name = m.group('obj')
|
|
self.__attr_name = m.group('attr')
|
|
super(Attribute, self).__init__()
|
|
|
|
def __get_obj_name(self):
|
|
return self.__obj_name
|
|
obj_name = property(__get_obj_name)
|
|
|
|
def __get_attr_name(self):
|
|
return self.__attr_name
|
|
attr_name = property(__get_attr_name)
|
|
|
|
def __get_obj(self):
|
|
"""
|
|
Returns the obj instance this attribute is associated with, or None
|
|
if no association has been set.
|
|
"""
|
|
return self.__obj
|
|
obj = property(__get_obj)
|
|
|
|
def _on_finalize(self):
|
|
self.__obj = self.api.Object[self.obj_name]
|
|
super(Attribute, self)._on_finalize()
|
|
|
|
|
|
class Method(Attribute, Command):
|
|
"""
|
|
A command with an associated object.
|
|
|
|
A `Method` plugin must have a corresponding `Object` plugin. The
|
|
association between object and method is done through a simple naming
|
|
convention: the first part of the method name (up to the first under
|
|
score) is the object name, as the examples in this table show:
|
|
|
|
============= =========== ==============
|
|
Method name Object name Attribute name
|
|
============= =========== ==============
|
|
user_add user add
|
|
noun_verb noun verb
|
|
door_open_now door open_now
|
|
============= =========== ==============
|
|
|
|
There are three different places a method can be accessed. For example,
|
|
say you created a `Method` plugin and its corresponding `Object` plugin
|
|
like this:
|
|
|
|
>>> from ipalib import create_api
|
|
>>> api = create_api()
|
|
>>> class user_add(Method):
|
|
... def run(self, **options):
|
|
... return dict(result='Added the user!')
|
|
...
|
|
>>> class user(Object):
|
|
... pass
|
|
...
|
|
>>> api.register(user_add)
|
|
>>> api.register(user)
|
|
>>> api.finalize()
|
|
|
|
First, the ``user_add`` plugin can be accessed through the ``api.Method``
|
|
namespace:
|
|
|
|
>>> list(api.Method)
|
|
['user_add']
|
|
>>> api.Method.user_add() # Will call user_add.run()
|
|
{'result': 'Added the user!'}
|
|
|
|
Second, because `Method` is a subclass of `Command`, the ``user_add``
|
|
plugin can also be accessed through the ``api.Command`` namespace:
|
|
|
|
>>> list(api.Command)
|
|
['user_add']
|
|
>>> api.Command.user_add() # Will call user_add.run()
|
|
{'result': 'Added the user!'}
|
|
|
|
And third, ``user_add`` can be accessed as an attribute on the ``user``
|
|
`Object`:
|
|
|
|
>>> list(api.Object)
|
|
['user']
|
|
>>> list(api.Object.user.methods)
|
|
['add']
|
|
>>> api.Object.user.methods.add() # Will call user_add.run()
|
|
{'result': 'Added the user!'}
|
|
|
|
The `Attribute` base class implements the naming convention for the
|
|
attribute-to-object association. Also see the `Object` and the
|
|
`Property` classes.
|
|
"""
|
|
extra_options_first = False
|
|
extra_args_first = False
|
|
|
|
def __init__(self):
|
|
super(Method, self).__init__()
|
|
|
|
def get_output_params(self):
|
|
for param in self.obj.params():
|
|
if 'no_output' in param.flags:
|
|
continue
|
|
yield param
|
|
for param in self.params():
|
|
if param.name not in list(self.obj.params):
|
|
if 'no_output' in param.flags:
|
|
continue
|
|
yield param
|
|
for param in self._get_param_iterable('output_params', verb='has'):
|
|
yield param
|
|
|
|
|
|
class Property(Attribute):
|
|
klass = Str
|
|
default = None
|
|
default_from = None
|
|
normalizer = None
|
|
|
|
def __init__(self):
|
|
super(Property, self).__init__()
|
|
# FIXME: This is a hack till Param.label is updated to require a
|
|
# LazyText instance:
|
|
self.label = None
|
|
self.rules = tuple(
|
|
sorted(self.__rules_iter(), key=lambda f: getattr(f, '__name__'))
|
|
)
|
|
self.kwargs = tuple(
|
|
sorted(self.__kw_iter(), key=lambda keyvalue: keyvalue[0])
|
|
)
|
|
kw = dict(self.kwargs)
|
|
self.param = self.klass(self.attr_name, *self.rules, **kw)
|
|
|
|
def __kw_iter(self):
|
|
for (key, kind, default) in self.klass.kwargs:
|
|
if getattr(self, key, None) is not None:
|
|
yield (key, getattr(self, key))
|
|
|
|
def __rules_iter(self):
|
|
"""
|
|
Iterates through the attributes in this instance to retrieve the
|
|
methods implementing validation rules.
|
|
"""
|
|
for name in dir(self.__class__):
|
|
if name.startswith('_'):
|
|
continue
|
|
base_attr = getattr(self.__class__, name)
|
|
if is_rule(base_attr):
|
|
attr = getattr(self, name)
|
|
if is_rule(attr):
|
|
yield attr
|
|
|
|
class Updater(Method):
|
|
"""
|
|
An LDAP update with an associated object (always update).
|
|
|
|
All plugins that subclass from `Updater` will be automatically available
|
|
as a server update function.
|
|
|
|
Plugins that subclass from Updater are registered in the ``api.Updater``
|
|
namespace. For example:
|
|
|
|
>>> from ipalib import create_api
|
|
>>> api = create_api()
|
|
>>> class my(Object):
|
|
... pass
|
|
...
|
|
>>> api.register(my)
|
|
>>> class my_update(Updater):
|
|
... pass
|
|
...
|
|
>>> api.register(my_update)
|
|
>>> api.finalize()
|
|
>>> list(api.Updater)
|
|
['my_update']
|
|
>>> api.Updater.my_update # doctest:+ELLIPSIS
|
|
ipalib.frontend.my_update()
|
|
"""
|
|
def __init__(self):
|
|
super(Updater, self).__init__()
|
|
|
|
def __call__(self, **options):
|
|
self.debug(
|
|
'raw: %s', self.name
|
|
)
|
|
|
|
return self.execute(**options)
|