Hello everyone I'm working on a pretty big-ish web app for interfacing with a multimedia database, and I'm using CGI::Application, along with ImageMagick to deal with converting images, generating resized preview files, etc.

I have a feeling I'm not doing something right with returning my images from the runmode which fetches the filedata. Everything works great when I embed it in an <IMG> tag, but if I try to make a download link in an <A HREF> the binary data is returned. I know that's fairly characteristic of improper headers, but I'm calling $q->header( -type => 'image/jpeg'); before reading the file data from the file to a buffer variable and then returning that data.

Kind of a separate but related issue is that I can't get the browser to display a filename/file extension with doing 'save (link) as' on the download link, or 'save image as' on the image file.

I had found an article with some examples using a redirect to append a "/image.extension" onto the URL, but that might be old and probably doesn't work anymore (and seems like it was kind of a hack anyway). I know this is a common situation, but I haven't been able to find much of any information on it.

This is what I have now: 
sub getMediaFile{
    my $self = shift();
    my $q = $self->query();
    my $fileId = $q->param("fileId");
    my $getPreviewFile = $q->param("preview");
    my $mediaFileInfoTemp = BioMeRSAModel::getMediaInfo($fileId);
    my %mediaFileInfo = %$mediaFileInfoTemp;
    my $filePath = $mediaFileInfo{"path"}."/".$mediaFileInfo{"filename
+"};
    if ($getPreviewFile eq "true"){
        my $NameWithoutExtension = $mediaFileInfo{"filename"};
        $NameWithoutExtension =~ s/\.[^.]*$//;
        my $previewFilePath = $mediaFileInfo{"path"}."/".$NameWithoutE
+xtension."_preview.jpg";
        if (-e $previewFilePath){
            $filePath = $previewFilePath;
        }
    }
    $q->header( -type => 'image/jpeg');
    my $fileData;
    my $fileBuffer;
    open MEDIAFILE, $filePath or return "error opening file";
    binmode MEDIAFILE;
    while(read(MEDIAFILE, $fileBuffer, 1)){
        $fileData.=$fileBuffer;
    }
    return $fileData;

[download]
Thanks!

In reply to Problems with dynamic images by ibmman

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