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[fix] ClientPref - don't raise exception if Accept-Language is invalid

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If the Accept-Language header [1] is set but empty or holds a value that is
unknown to babel, an excpetion is raised::

    $ curl --header 'Accept-Language: xyz' 'http://127.0.0.1:8888/search?q=foo'
    ...
    Traceback (most recent call last):
      File "searx/preferences.py", line 335, in from_http_request
        return cls(locale=pairs[0][0])
    IndexError: list index out of range

[1] https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language

Reported by: @Eolien55 in https://github.com/searxng/searxng/issues/2434#issuecomment-1556199789
Closes: https://github.com/searxng/searxng/issues/2434
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser 2023-05-22 12:17:57 +02:00
parent 73c023bbea
commit bc647fabaf
1 changed files with 6 additions and 2 deletions
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8
searx/preferences.py
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@ -331,8 +331,12 @@ class ClientPref:
except (ValueError, babel.core.UnknownLocaleError):
continue
pairs.append((locale, qvalue))
pairs.sort(reverse=True, key=lambda x: x[1])
return cls(locale=pairs[0][0])
locale = None
if pairs:
pairs.sort(reverse=True, key=lambda x: x[1])
locale = pairs[0][0]
return cls(locale=locale)
class Preferences: