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annotate roundup/cgi/accept_language.py @ 5220:14d8f61e6ef2

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Reimplemented anti-csrf measures by raising exceptions rather than returning booleans. Redoing it using exceptions was the easiest way to return proper xmlrpc fault messages to the clients. Also this code should now properly make values set in the form override values from the database. So no lost work under some circumstances if the csrf requirements are not met. Also this code does a better job of cleaning up old csrf tokens.
author John Rouillard <rouilj@ieee.org>
date Wed, 05 Apr 2017 20:56:08 -0400
parents 74476eaac38a
children b00cd44fea16
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 = "([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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74476eaac38a more modernisation
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38 ascii = ''.join([chr(x) for x in range(256)])
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39 whitespace = ' \t\n\r\v\f'
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40
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41 def parse(language_header):
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42 """parse(string_with_accept_header_content) -> languages list"""
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43
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44 if language_header is None: return []
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45
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46 # strip whitespaces.
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47 lh = language_header.translate(ascii, whitespace)
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48
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49 # if nothing, return
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50 if lh == "": return []
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51
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52 # split by commas and parse the quality values.
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53 pls = [lre.findall(x) for x in lh.split(',')]
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54
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55 # drop uncomformant
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56 qls = [x[0] for x in pls if len(x) > 0]
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57
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58 # use a heap queue to sort by quality values.
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59 # the value of each item is 1.0 complement.
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60 pq = []
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61 for l in qls:
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62 if l[0] != '':
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63 heapq.heappush(pq, (0.0, l[0]))
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64 else:
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65 heapq.heappush(pq, (1.0-float(l[2]), l[1]))
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66
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67 # get the languages ordered by quality
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68 # and replace - by _
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69 return [x[1].replace('-','_') for x in pq]
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70
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71 if __name__ == "__main__":
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72 import doctest
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73 doctest.testmod()
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74
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75 # vim: set et sts=4 sw=4 :
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