path: root/IkiWiki/Plugin/attachment.pm

#!/usr/bin/perl
package IkiWiki::Plugin::attachment;

use warnings;
use strict;
use IkiWiki 2.00;
use CGI;
$CGI::DISABLE_UPLOADS=0;

# TODO move to admin prefs
$config{valid_attachments}="(*.mp3 and maxsize(15mb)) or (!ispage() and maxsize(50kb))";

sub import { #{{{
    hook(type => "formbuilder_setup", id => "attachment", call => \&formbuilder_setup);
    hook(type => "formbuilder", id => "attachment", call => \&formbuilder);
} # }}}

sub formbuilder_setup { #{{{
    my %params=@_;
    my $form=$params{form};

    return if $form->field("do") ne "edit";

    $form->field(name => 'attachment', type => 'file');
} #}}}

sub formbuilder (@) { #{{{
    my %params=@_;
    my $form=$params{form};

    return if $form->field("do") ne "edit";

    if ($form->submitted eq "Upload") {
        my $q=$params{cgi};
        my $filename=$q->param('attachment');
        if (! defined $filename || ! length $filename) {
            # no file, so do nothing
            return;
        }
        
        # This is an (apparently undocumented) way to get the name
        # of the temp file that CGI writes the upload to.
        my $tempfile=$q->tmpFileName($filename);
        
        # Put the attachment in a subdir of the page it's attached
        # to, unless that page is an "index" page.
        my $page=$form->field('page');
        $page=~s/(^|\/)index//;
        $filename=$page."/".IkiWiki::basename($filename);
        
        # To untaint the filename, escape any hazardous characters,
        # and make sure it isn't pruned.
        $filename=IkiWiki::titlepage(IkiWiki::possibly_foolish_untaint($filename));
        if (IkiWiki::file_pruned($filename, $config{srcdir})) {
            error(gettext("bad attachment filename"));
        }
        
        # Check that the user is allowed to edit a page with the
        # name of the attachment.
        IkiWiki::check_canedit($filename, $q, $params{session}, 1);
        
        # Use a pagespec to test that the attachment is valid.
        if (exists $config{valid_attachments} &&
            length $config{valid_attachments}) {
            my $result=pagespec_match($filename, $config{valid_attachments},
                file => $tempfile);
            if (! $result) {
                error(gettext("attachment rejected")." ($result)");
            }
        }

        # Move the attachment into place.
        # Try to use a fast rename; fall back to copying.
        IkiWiki::prep_writefile($filename, $config{srcdir});
        unlink($config{srcdir}."/".$filename);
        if (! rename($tempfile, $config{srcdir}."/".$filename)) {
            my $fh=$q->upload('attachment');
            if (! defined $fh || ! ref $fh) {
                error("failed to get filehandle");
            }
            binmode($fh);
            writefile($filename, $config{srcdir}, undef, 1, sub {
                IkiWiki::fast_file_copy($tempfile, $filename, $fh, @_);
            });
        }

        # TODO add to vcs
        
        # TODO trigger a wiki build if there's no vcs
    }
} # }}}

package IkiWiki::PageSpec;

sub parsesize { #{{{
    my $size=shift;
    no warnings;
    my $base=$size+0; # force to number
    use warnings;
    my $multiple=1;
    if ($size=~/kb?$/i) {
        $multiple=2**10;
    }
    elsif ($size=~/mb?$/i) {
        $multiple=2**20;
    }
    elsif ($size=~/gb?$/i) {
        $multiple=2**30;
    }
    elsif ($size=~/tb?$/i) {
        $multiple=2**40;
    }
    return $base * $multiple;
} #}}}

sub match_maxsize ($$;@) { #{{{
    shift;
    my $maxsize=eval{parsesize(shift)};
    if ($@) {
        return IkiWiki::FailReason->new("unable to parse maxsize (or number too large)");
    }

    my %params=@_;
    if (! exists $params{file}) {
        return IkiWiki::FailReason->new("no file specified");
    }

    if (-s $params{file} > $maxsize) {
        return IkiWiki::FailReason->new("file too large");
    }
    else {
        return IkiWiki::SuccessReason->new("file not too large");
    }
} #}}}

sub match_minsize ($$;@) { #{{{
    shift;
    my $minsize=eval{parsesize(shift)};
    if ($@) {
        return IkiWiki::FailReason->new("unable to parse minsize (or number too large)");
    }

    my %params=@_;
    if (! exists $params{file}) {
        return IkiWiki::FailReason->new("no file specified");
    }

    if (-s $params{file} < $minsize) {
        return IkiWiki::FailReason->new("file too small");
    }
    else {
        return IkiWiki::SuccessReason->new("file not too small");
    }
} #}}}

sub match_ispage ($$;@) { #{{{
    my $filename=shift;

    if (defined IkiWiki::pagetype($filename)) {
        return IkiWiki::SuccessReason->new("file is a wiki page");
    }
    else {
        return IkiWiki::FailReason->new("file is not a wiki page");
    }
} #}}}

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