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List:       kfm-devel
Subject:    Re: konqueror's head request
From:       Waldo Bastian <bastian () kde ! org>
Date:       2001-05-14 19:39:23
[Download RAW message or body]

On Monday 14 May 2001 03:59, David Faure wrote:
> On Monday 14 May 2001 09:29, Andreas Pour wrote:
> > Daniel Naber wrote:
> > > On Sunday 13 May 2001 15:05, David Faure wrote:
> > > >>So it does a HEAD even though there is no possible way Konqueror
> > > >> could have the file cached.
> > > >
> > > > What's the scenario here ? Simply opening
> > > > http://dot.kde.org/988852243/ in konq ? Or from the newsticker ?
> > >
> > > I'm not sure, maybe Andreas just grepped the log?
> >
> > Well if newsticker uses the same User Agent as Konqueror how am I to
> > tell?  Here is a typical series of requests:
> >
> > ZZZ.ZZZ.ZZZ.ZZZ - - [06/May/2001:13:44:25 -0400] "HEAD
> > /polls/vote.php?poll=5 HTTP/1.0" 200 0 "-" "Mozilla/5.0 (compatible;
> > Konqueror/2.2alpha1)"
> > [ ... ]
> > ZZZ.ZZZ.ZZZ.ZZZ - - [06/May/2001:13:44:39 -0400] "GET
> > /polls/vote.php?poll=5 HTTP/1.0" 200 21037 "-" "Mozilla/5.0 (compatible;
> > Konqueror/2.2alpha1)
> >
> > Note the 14-second delay.
> >
> > I analyzed about 200,000 Konqueror requests from log files and posted
> > the results at http://www.kde.com/devel/konqRequests.php.  The highlight
> > is that Konqueror does a HEAD before a related GET about 0.5% of the
> > time, and the average delay caused by the initial HEAD is about 15
> > seconds.  I could not find a pattern for when a HEAD precedes a GET, but
> > I can provide a list of URLs (sans the requestor's URL) which are
> > affected to anyone who is interested.
>
> 0.5% of the time ? That's most certainly the newsticker.
> I see no surprise here. From konqueror we can start a GET and react
> accordingly, but from another app we need to do a HEAD to see what's behind
> the URL, to open the right app on it. That's known, I don't see what we can
> do about it. 

Hm. We can use the same trick as konqueror does internally between apps as 
well. Need to add a bit of code for that. Stay tuned :-)

Cheers,
Waldo
-- 
bastian@kde.org | SuSE Labs KDE Developer | bastian@suse.com

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