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Item4309: Updatet Images are not re-rendered by ImagePlugin

Item Form Data

AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Extension ImagePlugin Normal Confirmed   n/a  

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Reported By:
Applies To:
Current State:
Waiting For:
Target Release:
Released In:


ImagePlugin does not update new images attached to a topic.

E.g. if a new version of screenshot is uploaded by a user, the resized image within the topic (created by ImagePlugin) remains with the old image.

-- TWiki:Main/CedricWeber - 27 Jun 2007

Sounds like ImagePlugin could do with an attachhandler.

-- TWiki:Main.SteffenPoulsen - 16 Sep 2007

I've just come across this bug. I've written a patch. Note that the patch uses TWiki::Func::getPubDir(), which is deprecated. It's currently a bit of a hack: I'm not sure what extensions ImagePlugin allows, so I just put the popular ones in there for the regex. As it does an unlink: use at your own risk smile

sub afterAttachmentSaveHandler {
    # do not uncomment, use $_[0], $_[1]... instead
    ###   my( $attrHashRef, $topic, $web ) = @_;
    forceImageThumbnailRefresh($_[1], $_[2]);

# CFLEWIS | 2008-04-10 | Force a refresh of an image thumbnail by
# deleting the thumbnail.
sub forceImageThumbnailRefresh
    my $topic = shift;
    my $web = shift;
    my $path = TWiki::Func::getPubDir() . "/" . $web . "/" . $topic . "/";
    opendir(ATTACHDIR, $path);
    my @files = readdir(ATTACHDIR);
    foreach my $taintedFile (@files)
        my $file;
        if ($taintedFile =~ m/(.*)/)
            $file = $1;
        if ($file =~ m/^_(\d*)___(.*)\.(jpg|png|gif|tif)$/)
            # CFLEWIS | 2008-04-10 | Image plugin wrote this
            unlink $path . $file;

-- TWiki:Main.ChrisFLewis - 10 Apr 2008

Summary Updatet Images are not re-rendered by ImagePlugin
ReportedBy TWiki:Main.CedricWeber
Codebase 4.0.3
SVN Range TWiki-4.1.2, Mon, 25 Jun 2007, build 14278
AppliesTo Extension
Component ImagePlugin
Priority Normal
CurrentState Confirmed


TargetRelease n/a

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Topic revision: r3 - 2008-04-10 - ChrisFLewis
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