Referrer key missing form os.environ dictionary?

[Xaxa Urtiz]

Le mercredi 25 septembre 2013 17:02:45 UTC+2, Ferrous Cranus a écrit :
> Στις 25/9/2013 5:52 μμ, ο/η Steven D'Aprano έγραψε:
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> > On Wed, 25 Sep 2013 17:04:55 +0300, Νίκος wrote:
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> >
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> >> I would like to check for its existence and retrieve it if possible, if
> 
> >> its not there then default to the string "UnKnown Ref".
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> >>
> 
> >> I try to do this with:
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> >>
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> >> referer = os.environ.get('HTTP_REFERER', 'UnknownRef')
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> >>
> 
> >> but that doesn't return anything either.
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> >>
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> >> Can you verify that its the correct way to grab the referral string?
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> >
> 
> >
> 
> > The Referer is not an environment variable. How would your shell know
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> > what URL you were just browsing?
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> >
> 
> > Have you googled for HTTP Referer? Do you understand what it is?
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> >
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> >
> 
> Yes Steven googleign for 2 hours now.
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> 
> 
> You were rigth about the carret it was a synatx error above which i 
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> missed and i was breakign my head to the wall to understand what was wot 
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> with the 'host' variable. why python doestn detect the exact synxtax 
> 
> error and ispoitnign to me to another line making me think the error is 
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> elsewhere?
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> 
> 
> This indeed works now:
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> 
> 
> ref = os.environ.get('HTTP_REFERER', 'Άγνωστο Ref')
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> 
> 
> but iam wondering why this doesnt work also:
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> 
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> ref = os.environ('HTTP_REFERER')
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> 
> 
> Shouldnt both work?

http://www.tutorialspoint.com/python/dictionary_get.htm