make version of ts_mon compatible with appengine

appengine/chromium_build_logs/third_party/apiclient/mimeparse.py

-# Copyright (C) 2007 Joe Gregorio
-#
-# Licensed under the MIT License
-
-"""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.
-"""
-
-__version__ = '0.1.3'
-__author__ = 'Joe Gregorio'
-__email__ = 'joe@bitworking.org'
-__license__ = 'MIT License'
-__credits__ = ''
-
-
-def parse_mime_type(mime_type):
-    """Parses a mime-type into its component parts.
-
-    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'})
-       """
-    parts = mime_type.split(';')
-    params = dict([tuple([s.strip() for s in param.split('=', 1)])\
-            for param in parts[1:]
-                  ])
-    full_type = parts[0].strip()
-    # Java URLConnection class sends an Accept header that includes a
-    # single '*'. Turn it into a legal wildcard.
-    if full_type == '*':
-        full_type = '*/*'
-    (type, subtype) = full_type.split('/')
-
-    return (type.strip(), subtype.strip(), params)
-
-
-def parse_media_range(range):
-    """Parse a media-range into its component parts.
-
-    Carves up a media range 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/*;q=0.5' would get parsed
-    into:
-
-       ('application', '*', {'q', '0.5'})
-
-    In addition this function also guarantees that there is a value for 'q'
-    in the params dictionary, filling it in with a proper default if
-    necessary.
-    """
-    (type, subtype, params) = parse_mime_type(range)
-    if not params.has_key('q') or not params['q'] or \
-            not float(params['q']) or float(params['q']) > 1\
-            or float(params['q']) < 0:
-        params['q'] = '1'
-
-    return (type, subtype, params)
-
-
-def fitness_and_quality_parsed(mime_type, parsed_ranges):
-    """Find the best match for a mime-type amongst parsed media-ranges.
-
-    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 a tuple of
-    the fitness value and the value of the 'q' quality parameter of the best
-    match, or (-1, 0) if no match was found. Just as for quality_parsed(),
-    'parsed_ranges' must be a list of parsed media ranges.
-    """
-    best_fitness = -1
-    best_fit_q = 0
-    (target_type, target_subtype, target_params) =\
-            parse_media_range(mime_type)
-    for (type, subtype, params) in parsed_ranges:
-        type_match = (type == target_type or\
-                      type == '*' or\
-                      target_type == '*')
-        subtype_match = (subtype == target_subtype or\
-                         subtype == '*' or\
-                         target_subtype == '*')
-        if type_match and subtype_match:
-            param_matches = reduce(lambda x, y: x + y, [1 for (key, value) in \
-                    target_params.iteritems() if key != 'q' and \
-                    params.has_key(key) and value == params[key]], 0)
-            fitness = (type == target_type) and 100 or 0
-            fitness += (subtype == target_subtype) and 10 or 0
-            fitness += param_matches
-            if fitness > best_fitness:
-                best_fitness = fitness
-                best_fit_q = params['q']
-
-    return best_fitness, float(best_fit_q)
-
-
-def quality_parsed(mime_type, parsed_ranges):
-    """Find the best match for a mime-type amongst parsed media-ranges.
-
-    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.
-    """
-
-    return fitness_and_quality_parsed(mime_type, parsed_ranges)[1]
-
-
-def quality(mime_type, ranges):
-    """Return the quality ('q') of a mime-type against a list of media-ranges.
-
-    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
-
-    """
-    parsed_ranges = [parse_media_range(r) for r in ranges.split(',')]
-
-    return quality_parsed(mime_type, parsed_ranges)
-
-
-def best_match(supported, header):
-    """Return mime-type with the highest quality ('q') from list of candidates.
-
-    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. The list of supported mime-types should be sorted
-    in order of increasing desirability, in case of a situation where there is
-    a tie.
-
-    >>> best_match(['application/xbel+xml', 'text/xml'],
-                   'text/*;q=0.5,*/*; q=0.1')
-    'text/xml'
-    """
-    split_header = _filter_blank(header.split(','))
-    parsed_header = [parse_media_range(r) for r in split_header]
-    weighted_matches = []
-    pos = 0
-    for mime_type in supported:
-        weighted_matches.append((fitness_and_quality_parsed(mime_type,
-                                 parsed_header), pos, mime_type))
-        pos += 1
-    weighted_matches.sort()
-
-    return weighted_matches[-1][0][1] and weighted_matches[-1][2] or ''
-
-
-def _filter_blank(i):
-    for s in i:
-        if s.strip():
-            yield s