Problem checking an existing browser cookie

MRAB python at mrabarnett.plus.com
Sun Aug 29 20:44:12 CEST 2010


On 29/08/2010 06:34, Νίκος wrote:
> On 28 Αύγ, 23:15, MRAB<pyt... at mrabarnett.plus.com>  wrote:
>> On 28/08/2010 20:37, Íßêïò wrote:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>> On 22 Áýã, 10:27, Íßêïò<nikos.the.gr... at gmail.com>    wrote:
>>>> On 16 Áýã, 14:31, Peter Otten<__pete... at web.de>    wrote:
>>
>>>>> Íßêïò wrote:
>>>>>> # initializecookie
>>>>>> cookie=Cookie.SimpleCookie()
>>>>>> cookie.load( os.environ.get('HTTP_COOKIE', '') )
>>>>>> mycookie =cookie.get('visitor')
>>
>>>>>> if ( mycookie and mycookie.value != 'nikos' ) or re.search( r'(cyta|
>>>>>> yandex|13448|spider|crawl)', host ) is None:
>>>>>>       blabla...
>>>>>> ========================
>>
>>>>>> I checked and Chrome has acookienames visitor with a value ofnikos
>>>>>> within.
>>>>>> So, i have to ask why the if fails?
>>
>>>>> Maybe it's because != != ==
>>
>>>> Iwant ti if code block to be executed only if the browsercookienames
>>>> visitor fetched doesnt cotnain the vbalue of 'nikos'
>>
>>>> Is there somethign wrong with the way i wrote it?
>>
>>> Please do help me with this too becaus eif i dont solve this my
>>> website keeps count my each visit like iam a guest visitor!
>>
>> Print out mycookie, repr(mycookie.value) (unless mycookie is None) and
>> repr(host). Then follow the code yourself to see whether the condition
>> is True.
>
> print mycookie outputs 'None'
>
> Thts weird because i check with the browser and the cookie is there!
>
Just because you can see it doesn't mean your code can.

> print repr(host) outputs '78-236-176.adsl.cyta.gr'
>
> repr(mycookie.value) (unless mycookie is None)
>
> and also
>
> print mycookie.value gives an error too. Maybe there is not a value
> method?
>
If mycookie is None, then it's not surprising that doesn't have 'value'.

In summary, mycookie is None, so:

     mycookie and mycookie.value != 'nikos'

is false (actually None, which is treated as false).

host == '78-236-176.adsl.cyta.gr', so:

     re.search(r'(cyta|yandex|13448|spider|crawl)', host)

finds 'cyta' and the search returns a match.

false or false == false

blabla... isn't executed.



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