/usr/lib/python2.7/dist-packages/oauth2client/util.py is in python-oauth2client 2.0.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | # Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Common utility library."""
import functools
import inspect
import logging
import six
from six.moves import urllib
__author__ = [
'rafek@google.com (Rafe Kaplan)',
'guido@google.com (Guido van Rossum)',
]
__all__ = [
'positional',
'POSITIONAL_WARNING',
'POSITIONAL_EXCEPTION',
'POSITIONAL_IGNORE',
]
logger = logging.getLogger(__name__)
POSITIONAL_WARNING = 'WARNING'
POSITIONAL_EXCEPTION = 'EXCEPTION'
POSITIONAL_IGNORE = 'IGNORE'
POSITIONAL_SET = frozenset([POSITIONAL_WARNING, POSITIONAL_EXCEPTION,
POSITIONAL_IGNORE])
positional_parameters_enforcement = POSITIONAL_WARNING
def positional(max_positional_args):
"""A decorator to declare that only the first N arguments my be positional.
This decorator makes it easy to support Python 3 style keyword-only
parameters. For example, in Python 3 it is possible to write::
def fn(pos1, *, kwonly1=None, kwonly1=None):
...
All named parameters after ``*`` must be a keyword::
fn(10, 'kw1', 'kw2') # Raises exception.
fn(10, kwonly1='kw1') # Ok.
Example
^^^^^^^
To define a function like above, do::
@positional(1)
def fn(pos1, kwonly1=None, kwonly2=None):
...
If no default value is provided to a keyword argument, it becomes a
required keyword argument::
@positional(0)
def fn(required_kw):
...
This must be called with the keyword parameter::
fn() # Raises exception.
fn(10) # Raises exception.
fn(required_kw=10) # Ok.
When defining instance or class methods always remember to account for
``self`` and ``cls``::
class MyClass(object):
@positional(2)
def my_method(self, pos1, kwonly1=None):
...
@classmethod
@positional(2)
def my_method(cls, pos1, kwonly1=None):
...
The positional decorator behavior is controlled by
``util.positional_parameters_enforcement``, which may be set to
``POSITIONAL_EXCEPTION``, ``POSITIONAL_WARNING`` or
``POSITIONAL_IGNORE`` to raise an exception, log a warning, or do
nothing, respectively, if a declaration is violated.
Args:
max_positional_arguments: Maximum number of positional arguments. All
parameters after the this index must be
keyword only.
Returns:
A decorator that prevents using arguments after max_positional_args
from being used as positional parameters.
Raises:
TypeError: if a key-word only argument is provided as a positional
parameter, but only if
util.positional_parameters_enforcement is set to
POSITIONAL_EXCEPTION.
"""
def positional_decorator(wrapped):
@functools.wraps(wrapped)
def positional_wrapper(*args, **kwargs):
if len(args) > max_positional_args:
plural_s = ''
if max_positional_args != 1:
plural_s = 's'
message = ('%s() takes at most %d positional '
'argument%s (%d given)' % (
wrapped.__name__, max_positional_args,
plural_s, len(args)))
if positional_parameters_enforcement == POSITIONAL_EXCEPTION:
raise TypeError(message)
elif positional_parameters_enforcement == POSITIONAL_WARNING:
logger.warning(message)
else: # IGNORE
pass
return wrapped(*args, **kwargs)
return positional_wrapper
if isinstance(max_positional_args, six.integer_types):
return positional_decorator
else:
args, _, _, defaults = inspect.getargspec(max_positional_args)
return positional(len(args) - len(defaults))(max_positional_args)
def scopes_to_string(scopes):
"""Converts scope value to a string.
If scopes is a string then it is simply passed through. If scopes is an
iterable then a string is returned that is all the individual scopes
concatenated with spaces.
Args:
scopes: string or iterable of strings, the scopes.
Returns:
The scopes formatted as a single string.
"""
if isinstance(scopes, six.string_types):
return scopes
else:
return ' '.join(scopes)
def string_to_scopes(scopes):
"""Converts stringifed scope value to a list.
If scopes is a list then it is simply passed through. If scopes is an
string then a list of each individual scope is returned.
Args:
scopes: a string or iterable of strings, the scopes.
Returns:
The scopes in a list.
"""
if not scopes:
return []
if isinstance(scopes, six.string_types):
return scopes.split(' ')
else:
return scopes
def _add_query_parameter(url, name, value):
"""Adds a query parameter to a url.
Replaces the current value if it already exists in the URL.
Args:
url: string, url to add the query parameter to.
name: string, query parameter name.
value: string, query parameter value.
Returns:
Updated query parameter. Does not update the url if value is None.
"""
if value is None:
return url
else:
parsed = list(urllib.parse.urlparse(url))
q = dict(urllib.parse.parse_qsl(parsed[4]))
q[name] = value
parsed[4] = urllib.parse.urlencode(q)
return urllib.parse.urlunparse(parsed)
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