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s MIME-Type Parser
This module provides basic functions for handling mime-types. It can handle
matching mime-types against a list of media-ranges. See section 14.1 of
the HTTP specification [RFC 2616] for a complete explanation.
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1
Contents:
- parse_mime_type(): Parses a mime-type into its component parts.
- parse_media_range(): Media-ranges are mime-types with wild-cards and a 'q' quality parameter.
- quality(): Determines the quality ('q') of a mime-type when compared against a list of media-ranges.
- quality_parsed(): Just like quality() except the second parameter must be pre-parsed.
- best_match(): Choose the mime-type with the highest quality ('q') from a list of candidates.
s 0.1.2s Joe Gregorios joe@bitworking.orgt c
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d } n | i d \ } } | i | i | f S( s3 Carves up a mime-type and returns a tuple of the
(type, subtype, params) where 'params' is a dictionary
of all the parameters for the media range.
For example, the media range 'application/xhtml;q=0.5' would
get parsed into:
('application', 'xhtml', {'q', '0.5'})
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param_matchest fitness( ( s8 /usr/lib/python2.6/site-packages/paste/util/mimeparse.pyt fitness_and_quality_parsed= s" ''#;
c C s t | | d S( sT Find the best match for a given mime-type against
a list of media_ranges that have already been
parsed by parse_media_range(). Returns the
'q' quality parameter of the best match, 0 if no
match was found. This function bahaves the same as quality()
except that 'parsed_ranges' must be a list of
parsed media ranges. i ( R) ( R R ( ( s8 /usr/lib/python2.6/site-packages/paste/util/mimeparse.pyt quality_parsedX s c C s= g } | i d D] } | t | q ~ } t | | S( sė Returns the quality 'q' of a mime-type when compared
against the media-ranges in ranges. For example:
>>> quality('text/html','text/*;q=0.3, text/html;q=0.7, text/html;level=1, text/html;level=2;q=0.4, */*;q=0.5')
0.7
t ,( R R R* ( R t rangesR t rR ( ( s8 /usr/lib/python2.6/site-packages/paste/util/mimeparse.pyt qualityb s 0c C s g } | i d D] } | t | q ~ } g } | D] } | t | | | f q; ~ } | i | d d d o | d d p d S( sp Takes a list of supported mime-types and finds the best
match for all the media-ranges listed in header. The value of
header must be a string that conforms to the format of the
HTTP Accept: header. The value of 'supported' is a list of
mime-types.
>>> best_match(['application/xbel+xml', 'text/xml'], 'text/*;q=0.5,*/*; q=0.1')
'text/xml'
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c C sl g } g } | i d D] } | t | q ~ } x/ | D]' } t | | o | i | q= q= W| S( sũ Takes a list of desired mime-types in the order the server prefers to
send them regardless of the browsers preference.
Browsers (such as Firefox) technically want XML over HTML depending on how
one reads the specification. This function is provided for a server to
declare a set of desired mime-types it supports, and returns a subset of
the desired list in the same order should each one be Accepted by the
browser.
>>> sorted_match(['text/html', 'application/xml'], ... 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png')
['text/html', 'application/xml']
>>> sorted_match(['text/html', 'application/xml'], 'application/xml,application/json')
['application/xml']
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