On 11 ?.?. 2010, at 11:00, jimgardener wrote:
> hi
> In my application I am taking user given url strings.The user is
> likely to enter 'www.google.com' instead of 'http://
> www.google.com' .When I try to open the url
>
> import urllib2
> page=urllib2.urlopen(url)
>
> can give a ValueError if the user fails to enter 'http'.How can this
> problem be addressed?
I think the most 'correct' way to do this would be to use a URLField in your
form so that form.is_valid() will force the user to enter the http://
themselves. (Of course a message to the user on the form explaining this would
be helpful.)
This will also have nice side-effects like checking that it ends in a valid
TLD, and if you set URLField.verify_exists=True it will even ensure that the
URL leads somewhere other than a 404.
> do I have to prepend 'http' to every urlstring
> before trying to open it using urlopen?
Otherwise yes, I'd use something like:
if not url.startswith('http://'):
url = 'http://' + url
I'm a Django newbie myself, however, so someone else may chime in with a better
option for you.
Good luck!
Jonathan
> thanks
> jim
>
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