Re: setPageRefreshOnBacktrackEnabled problem?

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Hi Ondra,

While looking for something else, I see that I actually _did_ work =
around this.  I no longer recall why this works, but it does.  I have =
this in my "page frame" that wraps all of my content pages:

		<iframe style=3D"height:0px;width:0px;visibility:hidden" =
src=3D"about:blank">
			This frame prevents back/forward cache bug in =
Safari do not remove!
		</iframe>
	</webobject name =3D "Body" >

A related page is here: =
http://stackoverflow.com/questions/24046/the-safari-back-button-problem

Chuck


On 2012-04-26, at 8:44 PM, Chuck Hill wrote:

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> On 2012-04-26, at 7:41 PM, Ond=C5=99ej =C4=8Cada wrote:
>=20
>> Chuck,
>>=20
>> On Apr 27, 2012, at 4:23 AM, Chuck Hill wrote:
>>=20
>>> Which browser are you using?
>>=20
>> Safari / Mac OS X. The client reported problems from iPad.
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> Ah, yes.  My aging memory is slowly starting to cough up things.  :-)
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>=20
>> 03-Jun-2008 05:18 PM Chuck Hill:
>> Safari always caches HTML content.  Regardless of the headers, it =
uses the local cache instead of going back to the server.  This is a =
very serious problem with dynamic web apps (like for example, this one).
>>=20
>> Following the instructions =
here:http://developer.apple.com/internet/safari/faq.html#anchor5
>> does nothing.  See attached screen shot of inspector in Safari =
showing the headers returned to Safari.  Clicking back on this page uses =
the local cache.  Clearly, it should not do that.
>=20
> Radar 5983915.  Still open.  Though I did get a little curt with Apple =
Engineering when they asked for a reproduction case.
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> Clearly, Safari is totally broken.  I have no solution for this other =
than "don't back track".
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> Chuck
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>=20
>>=20
>>> It seems like maybe the browser is caching instead of respecting the =
headers.
>>=20
>> Hmmmm..... seems it is so! I've just downloaded FF, and the behaviour =
there is indeed considerably different from Safari, and seems from it, =
it works (more or less) all right. Namely, backtrack does trigger =
dispatch/appendToResponse there all right
>>=20
>> (Somewhat inconsistently with what you suggested /or at least with =
what I understood/, the action then _gets_ called all right, too. That's =
not important though.)
>>=20
>> Which is bad, since my client rather needs that the app does work =
with iPad/Safari, too. Darn...
>>=20
>>> It is probably worth using a proxy for your browser (Charles is one) =
and see if it is actually sending a request.  If not, then it is buggy =
or something is wrong with those headers.  If it IS sending a request, =
then there is a problem in WO or perhaps your web server.  Hmmm, that =
reminds me of something.  Are you using mod_expires in Apache?  It can =
mess with the headers.
>>=20
>> The headers look like this:
>>=20
>> =3D=3D=3D=3D
>> HTTP/1.1 200 Apple WebObjects
>> cache-control: private
>> cache-control: no-cache
>> cache-control: no-store
>> cache-control: must-revalidate
>> cache-control: max-age=3D0
>> expires: Fri, 27-Apr-2012 02:32:48 GMT
>> content-type: text/html; charset=3DUTF-8
>> pragma: no-cache
>> x-webobjects-loadaverage: 4
>> date: Fri, 27-Apr-2012 02:32:48 GMT
>> set-cookie: wosid=3DsQtMjsY7xerCBetSFGubaM; version=3D"1"; =
path=3D/cgi-bin/WebObjects/CEBOIS.woa
>> set-cookie: woinst=3D-1; version=3D"1"; =
path=3D/cgi-bin/WebObjects/CEBOIS.woa
>> content-length: 4140
>> =3D=3D=3D=3D
>>=20
>> Thanks and all the best,
>> ---
>> Ondra =C4=8Cada
>> OCSoftware:     [email protected]               http://www.ocs.cz
>> private         [email protected]             http://www.ocs.cz/oc
>>=20
>>=20
>>=20
>=20
> --=20
> Chuck Hill             Senior Consultant / VP Development
>=20
> Practical WebObjects - for developers who want to increase their =
overall knowledge of WebObjects or who are trying to solve specific =
problems.   =20
> http://www.global-village.net/gvc/practical_webobjects
>=20
>=20
>=20
>=20
>=20
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>=20
>=20

--=20
Chuck Hill             Senior Consultant / VP Development

Practical WebObjects - for developers who want to increase their overall =
knowledge of WebObjects or who are trying to solve specific problems.   =20=

http://www.global-village.net/gvc/practical_webobjects









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