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� Zd� Zd� ZdS )z�Utility functions for handling XRIs.
@see: XRI Syntax v2.0 at the U{OASIS XRI Technical Committee<http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=xri>}
� N)�reduce)� codecutil)�!�=�@�+�$�(c �V � | � d� � s| r| d t v rdS dS )zWDetermine if this identifier is an XRI or URI.
@returns: C{"XRI"} or C{"URI"}
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identifiers �2/usr/lib/python3/dist-packages/openid/yadis/xri.py�identifierSchemer s: � �
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xref_match�xrefs r � _escape_xrefr" % sS � � � � � � �D� �<�<��U� #� #�D� �<�<��U� #� #�D� �<�<��U� #� #�D� �Kr c �r � | � dd� � } t � t | � � } | S )zBEscape things that need to be escaped when transforming to an IRI.�%z%25)r �_xref_re�subr" r s r r r / s- � �
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)�C� �Jr c �: � t t | � � � � S )z$Transform an XRI to URI normal form.)�iriToURIr r s r � toURINormalr) 6 s � � �K��$�$� %� %�%r c � � t | t � � rt | d�� � } | � dd�� � � � � S )z.Transform an IRI to a URI by escaping unicode.zutf-8)�encoding�ascii�oid_percent_escape)�errors)�
isinstance�bytes�str�encode�decode)�iris r r( r( ; sK � � �#�u� � � )��#��(�(�(�� �:�:�g�&:�:� ;� ;� B� B� D� D�Dr c �L � |� d� � }|d|� }|| k S )zKIs this provider ID authoritative for this XRI?
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� |D � � � � }|d }t |� � S ) z�Return the root authority for an XRI.
Example::
rootAuthority("xri://@example") == "xri://@"
@type xri: unicode
@returntype: unicode
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<listcomp>z!rootAuthority.<locals>.<listcomp>h s" � �(H�(H�(H�!����� � �(H�(H�(Hr )r rB �indexr r �list�__add__r
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Ideally, this would do full normalization and provide comparsion
operators as per XRI Syntax. Right now, it just does a bit of
canonicalization by ensuring the xri scheme is present.
@param xri: an xri string
@type xri: unicode
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