[Zope-dev] Cache-bug in handling of files
Peter Arvidsson
peter@innodev.com
Mon, 14 Aug 2000 10:01:03 +0200
So there is nothing else I can do but to make my files open in a new
window then...
But what I dont understand is why IE doesnt send any If-Modified-Since
header? Shouldnt it always do that if the settings are not set to never
update cached files?
Peter
Jim Sanford skrev:
>
> since all the data at my corporate intranet site is pulled from a RDMS, all my refrence URLS are generated in JavaScript and have a
> rnd="a randomly generated number between 1 and a million" to force the browser to get the current page.
>
> __________________________________________________________________
>
> Jim Sanford
> . Database Engineer
> / \ / Accelerated Technology, Inc.
> / / 720 Oak Circle Drive East
> / / \ Mobile, AL 36609
> / / \ Voice: 334-661-5770 fax: 334-661-5788
> / \ E-Mail: jsanford@atinucleus.com
> Web: http://www.atinucleus.com
>
> Nucleus. All You NEED in an RTOS. Royalty Free
> __________________________________________________________________
>
> ----- Original Message -----
> From: Brian Lloyd <Brian@digicool.com>
> To: 'Peter Arvidsson' <peter@innodev.com>; Brian Lloyd <Brian@digicool.com>
> Cc: <zope-dev@zope.org>
> Sent: Friday, August 11, 2000 10:44 AM
> Subject: RE: [Zope-dev] Cache-bug in handling of files
>
> > I am using IE 5 (5.00.2919.6307), cache settings set to:
> > "Check for newer versions of stored pages:
> > Automatically
> >
> > Those settings should get the new file if it has changed.
> >
> > I am accessing the server through a proxy.. could that be a problem? I
> > think it would be strange if everyone accessing the website I am
> > building can see the new files..
> >
> > What do you think?
> >
> > Peter
>
> Peter - I have done some testing here and I can demonstrate
> that this is an IE issue.
>
> I set my cache to "Automatically" like yours and restarted
> it. I then opened a Netscape and created a new file object.
> I instrumented the code in the 'index_html' method of File
> objects so that I could tell _for sure_ whether things were
> actually being called at the server or not. Here's what I
> did:
>
> - create a file 'myfile.txt', uploading a contents of
> text1.txt into it.
>
> - visit the view tab with IE. The server
> confirms that the index_html was called, and the whole
> content was sent, not a 304.
>
> - now (using netscape again) upload the contents of
> text2.txt into the file object. The mgmt screen
> correctly shows the updated byte length, etc.
>
> - click the 'view' tab again on IE. My instrumenting
> confirms that IE is not contacting the server *at all*
> no matter how many times I click the 'view' tab, and I
> keep seeing the old content. A look at the headers
> produced by this shows nothing that tells IE it should
> be doing that:
>
> HTTP/1.1 200 OK
> Server: Zope/(unreleased version) ZServer/1.1b1
> Date: Fri, 11 Aug 2000 15:18:50 GMT
> Connection: close
> Content-Type: text/plain
> Content-Length: 944
> Last-Modified: Fri, 11 Aug 2000 15:16:06 GMT
>
> Interestingly, if you open the "view" tab in a new window,
> you'll see the updated content. Now, using that same new
> window, set your cursor at the end of the url string in the
> url bar and hit return. IE seems to reload the page, but it
> is not actually even contacting the server. Stranger yet, if
> you click the "refresh" button it *will* contact the server
> (and it passes an If-Modified-Since header, and correctly
> gets a 304 Not Modified).
>
> Now, use netscape to change the content again. The whole thing
> starts over. Clicking the 'view' link on the page or pressing
> return in the URL bar will not even contact the server and
> the only way to get the updated content is to explicitly press
> "refresh" or open a new window, even though the resource
> returned no caching information one way or the other.
>
> I'm going to close that bug report and include this report
> for those who may find it useful in the future.
>
> Brian Lloyd brian@digicool.com
> Software Engineer 540.371.6909
> Digital Creations http://www.digicool.com
>
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