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annotate roundup/cgi/accept_language.py @ 7800:2d4684e4702d

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fix: enhancement to history command output and % template fix. Rather than using the key field, use the label field for descriptions. Call cls.labelprop(default_to_id=True) so it returns id rather than the first sorted property name. If labelprop() returns 'id' or 'title', we return nothing. 'id' means there is no label set and no properties named 'name' or 'title'. So have the caller do whatever it wants (prepend classname for example) when there is no human readable name. This prevents %(name)s%(key)s from producing: 23(23). Also don't accept the 'title' property. Titles can be too long. Arguably we could: '%(name)20s' to limit the title length. However without ellipses or something truncating the title might be confusing. So again pretend there is no human readable name.
author John Rouillard <rouilj@ieee.org>
date Tue, 12 Mar 2024 11:52:17 -0400
parents 63c9680eed20
children
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52f89836d05b Parse the Accept-Language header as defined in RFC2616.
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1 """Parse the Accept-Language header as defined in RFC2616.
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2
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3 See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
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4 for details. This module should follow the spec.
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5 Author: Hernan M. Foffani (hfoffani@gmail.com)
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6 Some use samples:
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7
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8 >>> parse("da, en-gb;q=0.8, en;q=0.7")
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9 ['da', 'en_gb', 'en']
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10 >>> parse("en;q=0.2, fr;q=1")
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11 ['fr', 'en']
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12 >>> parse("zn; q = 0.2 ,pt-br;q =1")
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13 ['pt_br', 'zn']
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14 >>> parse("es-AR")
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15 ['es_AR']
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16 >>> parse("es-es-cat")
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17 ['es_es_cat']
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18 >>> parse("")
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19 []
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20 >>> parse(None)
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21 []
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22 >>> parse(" ")
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23 []
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24 >>> parse("en,")
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25 ['en']
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26 """
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27
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28 import re
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29 import heapq
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30
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31 # regexp for languange-range search
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32 nqlre = "([A-Za-z]+[-[A-Za-z]+]*)$"
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33 # regexp for languange-range search with quality value
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34 qlre = r"([A-Za-z]+[-[A-Za-z]+]*);q=([\d\.]+)"
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35 # both
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36 lre = re.compile(nqlre + "|" + qlre)
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37
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38 whitespace = ' \t\n\r\v\f'
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39 try:
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40 # Python 3.
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41 remove_ws = (str.maketrans('', '', whitespace),)
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42 except AttributeError:
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43 # Python 2.
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44 remove_ws = (None, whitespace)
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45
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46
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47 def parse(language_header):
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48 """parse(string_with_accept_header_content) -> languages list"""
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49
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50 if language_header is None: return [] # noqa: E701
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51
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52 # strip whitespaces.
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53 lh = language_header.translate(*remove_ws)
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54
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55 # if nothing, return
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56 if lh == "": return [] # noqa: E701
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57
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58 # split by commas and parse the quality values.
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59 pls = [lre.findall(x) for x in lh.split(',')]
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60
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61 # drop uncomformant
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62 qls = [x[0] for x in pls if len(x) > 0]
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63
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64 # use a heap queue to sort by quality values.
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65 # the value of each item is 1.0 complement.
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66 pq = []
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67 order = 0
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68 for lang in qls:
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69 order += 1
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70 if lang[0] != '':
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71 heapq.heappush(pq, (0.0, order, lang[0]))
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72 else:
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73 heapq.heappush(pq, (1.0-float(lang[2]), order, lang[1]))
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74
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75 # get the languages ordered by quality
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76 # and replace - by _
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77 return [heapq.heappop(pq)[2].replace('-', '_') for x in range(len(pq))]
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78
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79
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80 if __name__ == "__main__":
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81 import doctest
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82 doctest.testmod()
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83
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84 # vim: set et sts=4 sw=4 :
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