[Tutor] urllib2 issue getting realm

[Johan Geldenhuys]

Thanks Sanders
Will give that a go

Johan
Sent from my iPhone 4

On 31/08/2011, at 23:03, Sander Sweers <sander.sweers at gmail.com> wrote:

> On 31 August 2011 14:27, Johan Geldenhuys <johan at accesstel.com.au> wrote:
>> On 31/08/2011, at 22:09, Sander Sweers <sander.sweers at gmail.com> wrote:
>>> On 31 August 2011 09:46, Johan Geldenhuys <johan at accesstel.com.au> wrote:
>>>> I am trying to use a very simple piece of code to get the realm from
>>>> different HTTPS URLs.
>>>> 
>>>> This realm is essential for successful authentication on the HTTPS session.
>>> 
>>> I think you got 2 things mixed up, http authentication and encrypted
>>> http (https). Just having a https url does not mean you need to
>>> authenticate. Take 'https://mail.google.com' as an example.
>>> 
>>>> If have to run this for a few different hosts and capture the realm.
>>>> For one host, it works perfectly, but when I try the same code to get the
>>>> next realm, it fails. I suspect that I need to close some type of
>>>> connections or something, but I can't put my finger on it.
>>> <snip>
>>> 
>>>> For the next one:
>>>> 
>>>>>>> try:
>>>> ...     req = urllib2.Request(URL % ips[1])
>>>> ...     handle = urllib2.urlopen(req)
>>>> ... except IOError, e:
>>>> ...     print `e`
>>>> ...
>>>>>>> 
>>>> 
>>>> See, no "e" printed which means that something worked. The exception didn't
>>>> happen and I don't know why...Anybody?
>>> 
>>> Yes, when you type the url into your browser. I suspect it does not
>>> ask you to authenticate via http authentication. Therefor no exception
>>> is raised and you never print the headers.
> 
> Top posting is evil ;-).
> 
>> Focusing on the code below, do you know why it would raise the exception for the first
>> IP and not for the second?
> 
> Run this and you should see which error is being raise. Do note we
> catch urllib2.HTTPError instead of IOError.
> 
> try:
>    req = urllib2.Request(URL % ips[1])
>    handle = urllib2.urlopen(req)
>    print 'Success'
>    print handle.getcode()
>    print handle.headers
> except urllib2.HTTPError as e:
>    print 'Exception caught'
>    print e
>    print e.getcode()
>    print e.hdrs
> 
> Greets
> Sander
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