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Posted by amygdala on 08/13/07 10:10
Jerry Stuckle wrote:
> amygdala wrote:
>> "Jerry Stuckle" <jstucklex@attglobal.net> schreef in bericht
>> news:xqKdnb9U2fBnMyLbnZ2dnUVZ_uLinZ2d@comcast.com...
>>> amygdala wrote:
>>>> Rik wrote:
>>>>> On Fri, 10 Aug 2007 20:07:03 +0200, amygdala <noreply@noreply.com>
>>>>> wrote:
>>>>>> Could it be that Opera needs some kind of body content after a
>>>>>> redirection
>>>>>> header? Or could it perhaps be that Opera indeed thinks that it
>>>>>> should redirect back to the login page again, since it is
>>>>>> redirected to a page, that redirected to the login page in the
>>>>>> first place. lol
>>>>> Possiblity 1:
>>>>> Opera -> Tools -> preferences -> Advanced -> Network -> Enable
>>>>> Automatic Redirection.
>>>>>
>>>>> It's enabled by default, but can be disabled for whatever purpose.
>>>>> All the more reason why a header redirect should be accompanied by
>>>>> some information one is redirected, and a script should
>>>>> die()/exit() after that.
>>>>> Possibility 2:
>>>>> Opera get's the redirect, but still has the page with the same
>>>>> URL in cache, so decides to use that one. Set some header and/or
>>>>> html information these pages should not be cached.
>>>>>
>>>>> Possibility 3:
>>>>> The script isn't terminated after the first header-redirect,
>>>>> continues to run, and effectively changes the redirect by a second
>>>>> header() call. Putting an echo directly after it will force the
>>>>> headers to be sent, so they cannot be replaced anymore, resulting
>>>>> in the first one being the only one, and thus the one obeyed by
>>>>> the browser. Another example why one should die()/exit() after a
>>>>> redirect. <?php
>>>>> //this will offcourse end in /second.html
>>>>> header('Location: /first.html');
>>>>> header('Location: /second.html');
>>>>> <?php
>>>>> //this will end in /first.html
>>>>> header('Location: /first.html');
>>>>> flush();
>>>>> header('Location: /second.html');
>>>> This thing still has me puzzled. What I did is the following:
>>>>
>>>> My SessionHandler class has the following method:
>>>>
>>>> public function redirect( $url )
>>>> {
>>>> session_write_close();
>>>> header( 'Expires: Mon, 26 Jul 1997 05:00:00 GMT' );
>>>> header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT'
>>>> ); header( 'Cache-Control: no-store, no-cache, must-revalidate'
>>>> ); header( 'Cache-Control: post-check=0, pre-check=0', false );
>>>> header( 'Pragma: no-cache' );
>>>> header( 'HTTP/1.0 302 Moved Temporarily' );
>>>> header( 'Location: ' . $url );
>>>> // this part between the comments is important
>>>> echo 'You\'re being redirected to ' . $url . ' .
>>>> Click <a href="' . $url. '">here</a> if it doesn\'t work';
>>>> // end important part
>>>> exit(); // exit doesn't really make a difference for Opera
>>>> }
>>>>
>>>> Since I have now included the exit() statement I am sure that this
>>>> is the last thing done by the application when redirecting. Also,
>>>> I have added cache control headers and the likes. But still in
>>>> Opera the problem persists if I leave out the echo part you see
>>>> above between the comments. So, from my experience it seems as if Opera
>>>> wants some body
>>>> content for the redirect to work and revalidate the url I landed
>>>> on before I had to log in.
>>>>
>>>> Does anyone have any other clue as to what might be going on here?
>>>>
>>>> Thanks.
>>> Why are you sending a message they will never see, anyway? Normally a
>>> redirect header has NO text associated with it.
>>>
>>> If you have your header set up appropriately, they will be
>>> redirected. All the message might do is screw things up for the
>>> browser.
>>
>> PS.: Correct me if I'm wrong, but are my headers not set up properly?
>>
>>
>
> Well, I don't see why you have the session_write_close() - the session
> will be closed during exit() processing, anyway.
>
> I also don't see why you have all of the cache control stuff. It's
> completely unnecessary in this case.
>
> Keep it simple - the 302 moved and location should be all you need.
I would think so to, but if you have read the entire thread you would see
that I am having trouble with getting it to work as expected in Opera. So I
thought I'ld use every option at my disposal to make sure the redirect and
the session saving works as expected.
But now, it looks like the Opera problem only exists when accessing the
application local on localhost. (See my reply to Rik)
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