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annotate roundup/cgi/accept_language.py @ 5973:fe334430ca07

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issue2550919 - Anti-bot signup using 4 second delay Took the code by erik forsberg and massaged it into the core. So this is no longer needed in the tracker. Updated devel and responsive trackers to remove timestamp.py and update input field name. Docs, changes and tests complete. Hopefully these tracker changes won't cause an issue for other tests.
author John Rouillard <rouilj@ieee.org>
date Sat, 09 Nov 2019 00:30:37 -0500
parents 936275dfe1fa
children ed8a9974c1bd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 def parse(language_header):
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47 """parse(string_with_accept_header_content) -> languages list"""
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48
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49 if language_header is None: return []
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50
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51 # strip whitespaces.
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52 lh = language_header.translate(*remove_ws)
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53
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54 # if nothing, return
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55 if lh == "": return []
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56
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57 # split by commas and parse the quality values.
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58 pls = [lre.findall(x) for x in lh.split(',')]
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59
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60 # drop uncomformant
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61 qls = [x[0] for x in pls if len(x) > 0]
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62
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63 # use a heap queue to sort by quality values.
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64 # the value of each item is 1.0 complement.
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65 pq = []
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66 for l in qls:
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67 if l[0] != '':
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68 heapq.heappush(pq, (0.0, l[0]))
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69 else:
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70 heapq.heappush(pq, (1.0-float(l[2]), l[1]))
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71
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72 # get the languages ordered by quality
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73 # and replace - by _
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74 return [x[1].replace('-','_') for x in pq]
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75
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76 if __name__ == "__main__":
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77 import doctest
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78 doctest.testmod()
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79
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80 # vim: set et sts=4 sw=4 :
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