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oauthlib.common
~~~~~~~~~~~~~~
This module provides data structures and utilities common
to all implementations of OAuth.
� N)�quote�unquote� urlencode� )� get_debug)�randbits)� SystemRandom)� getrandbitsZ>abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789z_ !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}z&([^&;]*(?:password|token)[^=]*=)[^&;]+z&%[^0-9A-Fa-f]|%[0-9A-Fa-f][^0-9A-Fa-f]zAABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.-Zoauthlib� /c C s: t | t�r| �d�n| } t| |�} t | t�r6| �d�} | S �N�utf-8)�
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r c C sL g }| D ]>\}}|� t|t�r(|�d�n|t|t�r>|�d�n|f� q|S )ziEnsures that all parameters in a list of 2-element tuples are encoded to
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r r )r Zdecodedr r r r r �decode_params_utf8V s �r z=&;:%+~,*@!()/?'$c C sT | r,t | �tks,d}t|t | �t | f ��t�| �r>td��tj| dd�}t|�S )a� Decode a query string in x-www-form-urlencoded format into a sequence
of two-element tuples.
Unlike urlparse.parse_qsl(..., strict_parsing=True) urldecode will enforce
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a ValueError will be raised. urllib.parse_qsl will only raise errors if
any of name-value pairs omits the equals sign.
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r2 c C s t t td��t� �S )a� Generate pseudorandom nonce that is unlikely to repeat.
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Per `section 3.2.1`_ of the MAC Access Authentication spec.
A random 64-bit number is appended to the epoch timestamp for both
randomness and to decrease the likelihood of collisions.
.. _`section 3.2.1`: https://tools.ietf.org/html/draft-ietf-oauth-v2-http-mac-01#section-3.2.1
.. _`section 3.3`: https://tools.ietf.org/html/rfc5849#section-3.3
�@ )r r �generate_timestampr r r r �generate_nonce� s r5 c C s t tt�� ��S )aD Get seconds since epoch (UTC).
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Per `section 3.2.1`_ of the MAC Access Authentication spec.
.. _`section 3.2.1`: https://tools.ietf.org/html/draft-ietf-oauth-v2-http-mac-01#section-3.2.1
.. _`section 3.3`: https://tools.ietf.org/html/rfc5849#section-3.3
)r �int�timer r r r r4 � s r4 � c s$ t � �d�� �fdd�t| �D ��S )aX Generates a non-guessable OAuth token
OAuth (1 and 2) does not specify the format of tokens except that they
should be strings of random characters. Tokens should not be guessable
and entropy when generating the random characters is important. Which is
why SystemRandom is used instead of the default random.choice method.
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.. _`rootLabs`: http://rdist.root.org/2010/01/07/timing-independent-array-comparison/
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