From kfm-devel Sat Mar 31 10:03:08 2001 From: owner () bugs ! kde ! org (Stephan Kulow) Date: Sat, 31 Mar 2001 10:03:08 +0000 To: kfm-devel Subject: Bug#23382: marked as done (reload on a page returning different mimetype) by David Faure and subject line Bug#23382: reload on a page returning different mimetype has caused the attached bug report to be marked as done. This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what I'm talking about this indicates a serious mail system misconfiguration somewhere. Please contact me immediately.) Stephan Kulow (administrator, KDE bugs database) Received: (at submit) by bugs.kde.org; 31 Mar 2001 02:50:57 +0000 Received: (qmail 20802 invoked by uid 33); 31 Mar 2001 02:50:57 -0000 Date: 31 Mar 2001 02:50:57 -0000 Message-ID: <20010331025057.20801.qmail@master.kde.org> To: submit@bugs.kde.org Subject: reload on a page returning different mimetype From: leonb@research.att.com Package: khtml Version: 3.0 (using KDE 2.1.9 >= 20010310) Severity: normal Installed from: compiled sources Compiler: gcc version 2.96 20000731 (Red Hat Linux 7.0) OS: Linux 2.4.2 i686 OS/Compiler notes: Go to the following page: http://djvuserver.research.att.com/~leonb/test/fun.cgi This cgi script randomly returns either a gif image or a html page showing the text of the script. The first time, you might see the html or the gif image. Nevertheless, keep pressing the RELOAD button until this changes. PROBLEM: konqueror does not realize that the mimetype is changed and that it should activate a different part. Therefore if you get the html the first time, you see garbage when it is time to see the image. And conversely! In the case of KHTML, this is happening in the last lines of urlSelected(), where the part calls its own openURL function instead of going back to the browser openURLRequest function. But this is also happening with kview, as you can see when you get the GIF the first time. I have seen this bug on CGI scripts that provide feedback to the user using a meta refresh (similar to a reload). It took me quite a while to produce a usable case ... One cannot assume that a reload will always produce the same mimetype. Especially when the response explicitely says that the data cannot be cached (Cache-Control: no-cache). Disgression: Legacy browsers :) always disable caching when the URL contains stuff like "/cgi-bin/" or ".cgi?..." or finish with ".cgi". This is of course extremly ad-hoc, but many scripts around rely on this behavior... Leon Bottou. (Submitted via bugs.kde.org) (Called from KBugReport dialog)