How to redirect to referring page?

[Zeynel]

Hi,

I just added a new page "/hot" to sort by number of votes to articles.

VoteHandler handles the vote with

item.vote +=1
item.put()
self.redirect("/newest")

but now the new page "/hot" also refers to this VoteHandler.

After writing the new vote to the database I need to redirect to
either /hot or /newest depending on the referrer.

I searched the group and stackoverflow
http://stackoverflow.com/search?page=2&tab=relevance&q=redirect%20google%20app%20engine
but I could not find the answer.

Can anyone direct me to the right reference?

Thanks.

[Robert Kluin]

Hi Zeynel,
Assuming webapp, how about:
if self.request.referrer == '/whatever':
self.redirect('/somespot')
elf self.request.referrer == '/other':
self.redirect('/aplace')
else:
self.redirect('/there')

Webapp's self.request is a WebOb request, so it is documented here:
http://pythonpaste.org/webob/reference.html#id1

Robert

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[Zeynel]

Thanks! But I noticed that in this case relative urls do not work. I
am not sure why. In the rest of the script all urls are relative.

On Jan 17, 1:26 pm, Robert Kluin <robert.kl...@gmail.com> wrote:
> Hi Zeynel,
>   Assuming webapp, how about:
>     if self.request.referrer == '/whatever':
>         self.redirect('/somespot')
>     elf self.request.referrer == '/other':
>         self.redirect('/aplace')
>     else:
>         self.redirect('/there')
>
>   Webapp's self.request is a WebOb request, so it is documented here:http://pythonpaste.org/webob/reference.html#id1
>
> Robert
>
>
>
>
>
>
>
> On Mon, Jan 17, 2011 at 12:52, Zeynel <azeyn...@gmail.com> wrote:
> > Hi,
>
> > I just added a new page "/hot" to sort by number of votes to articles.
>
> > VoteHandler handles the vote with
>
> > item.vote +=1
> > item.put()
> > self.redirect("/newest")
>
> > but now the new page "/hot" also refers to this VoteHandler.
>
> > After writing the new vote to the database I need to redirect to
> > either /hot or /newest depending on the referrer.
>
> > I searched the group and stackoverflow

> >http://stackoverflow.com/search?page=2&tab=relevance&q=redirect%20goo...

[Robert Kluin]

Yep, you're right. The referrer is not relative, if the host part of
your request changes, remove it.

http://docs.python.org/release/2.5.2/lib/string-methods.html

[Zeynel]

Ok, but not sure I see the "referrer" reference in the link you
supplied. I'll look again. Thanks.

[Robert Kluin]

Its not, that is a link to the Python string method docs. You'll
probably want to use some of those when you're writing the code to
process the http referrer.

Robert

[Nick Johnson (Google)]

I would strongly recommend avoiding relying on the 'referer' field for anything like this. It'll be unreliable - what if the user opened the vote page in a new tab? What if the user has referers disabled? Instead, pass the continue URL in to the handler, or have separate URLs based on the origin, or use AJAX, so the user doesn't have to leave the page they voted from in the first place.

-Nick Johnson

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Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: 368047

[Zeynel]

On Jan 18, 11:27 pm, "Nick Johnson (Google)" <nick.john...@google.com>
wrote:

> ...

> pass the continue URL in to the handler,
> or have separate URLs based on the origin,

> or use AJAX ...

Thanks. I notice the problems that you mentioned when I test the app.
Can you help with some more specific references about how to implement
the methods you mention above?