%# BEGIN BPS TAGGED BLOCK {{{
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<%perl>
my ( $ticket, $trans, $attach, $filename );
my $arg = $m->dhandler_arg;    # get rest of path
if ( $arg =~ m{^(\d+)/(\d+)} ) {
    $trans  = $1;
    $attach = $2;
}
else {
    Abort("Corrupted attachment URL.", Code => HTTP::Status::HTTP_BAD_REQUEST);
}
my $AttachmentObj = RT::Attachment->new( $session{'CurrentUser'} );
$AttachmentObj->Load($attach) || Abort("Attachment '$attach' could not be loaded", Code => HTTP::Status::HTTP_NOT_FOUND);

unless ( $AttachmentObj->id ) {
    Abort("Bad attachment id. Couldn't find attachment '$attach'\n", Code => HTTP::Status::HTTP_NOT_FOUND);
}
unless ( $AttachmentObj->TransactionId() == $trans ) {
    Abort("Bad transaction number for attachment. $trans should be". $AttachmentObj->TransactionId() . "\n", Code => HTTP::Status::HTTP_NOT_FOUND);
}

my $content = $AttachmentObj->OriginalContent;
my $content_type = $AttachmentObj->ContentType || 'text/plain';

my $attachment_regex = qr{^(image/svg\+xml|application/pdf)}i;
if ( RT->Config->Get('AlwaysDownloadAttachments') || ($content_type =~ $attachment_regex) ) {
    $r->headers_out->{'Content-Disposition'} = "attachment";
}
elsif ( !RT->Config->Get('TrustHTMLAttachments') ) {
    my $text_plain_regex = qr{^(text/html|application/xhtml\+xml|text/xml|application/xml)}i;
    $content_type = 'text/plain' if ( $content_type =~ $text_plain_regex );
}
elsif (lc $content_type eq 'text/html') {
    # If we're trusting and serving HTML for display not download, try to do
    # inline <img> rewriting to be extra helpful.
    my $count = RT::Interface::Web::RewriteInlineImages(
        Content     => \$content,
        Attachment  => $AttachmentObj,
    );
    $count //= 0;  # RewriteInlineImages can return undef when nothing needs to be rewritten
    RT->Logger->debug("Rewrote $count CID images when displaying original HTML attachment #$attach");
}

my $enc  = $AttachmentObj->OriginalEncoding || 'utf-8';
my $iana = Encode::find_encoding($enc);
   $iana = $iana ? $iana->mime_name : $enc;

require MIME::Types;
my $mimetype = MIME::Types->new->type($content_type);
unless ( $mimetype && $mimetype->isBinary ) {
    $content_type .= ";charset=$iana";
}

$r->headers_out->{'X-Content-Type-Options'} = 'nosniff' if RT->Config->Get('StrictContentTypes');
$r->content_type($content_type);
$m->clear_buffer();
$m->out($content);
$m->abort;
</%perl>
<%attr>
AutoFlush => 0
</%attr>
