path: root/IkiWiki/Plugin/attachment.pm

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

use warnings;
use strict;
use IkiWiki 2.00;

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

sub checkconfig () { #{{{
    $config{cgi_disable_uploads}=0;
} #}}}

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

    if ($form->field("do") eq "edit") {
        $form->field(name => 'attachment', type => 'file');
    }
    elsif ($form->title eq "preferences") {
        my $session=$params{session};
        my $user_name=$session->param("name");

        $form->field(name => "allowed_attachments", size => 50,
            fieldset => "admin",
            comment => "(".htmllink("", "", "ikiwiki/PageSpec", noimageinline => 1).")");
        if (! IkiWiki::is_admin($user_name)) {
            $form->field(name => "allowed_attachments", type => "hidden");
        }
                if (! $form->submitted) {
            $form->field(name => "allowed_attachments", force => 1,
                value => IkiWiki::userinfo_get($user_name, "allowed_attachments"));
                }
        if ($form->submitted && $form->submitted eq 'Save Preferences') {
            if (defined $form->field("allowed_attachments")) {
                IkiWiki::userinfo_set($user_name, "allowed_attachments",
                $form->field("allowed_attachments")) ||
                    error("failed to set allowed_attachments");
            }
        }
    }
} #}}}

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

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

    if ($form->submitted eq "Upload" || $form->submitted eq "Save Page") {
        my $q=$params{cgi};
        my $session=$params{session};

        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=(length $page ? $page."/" : "").IkiWiki::basename($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, $session, 1);
        
        # Use a special pagespec to test that the attachment is valid.
        my $allowed=1;
        foreach my $admin (@{$config{adminuser}}) {
            my $allowed_attachments=IkiWiki::userinfo_get($admin, "allowed_attachments");
            if (defined $allowed_attachments &&
                length $allowed_attachments) {
                $allowed=pagespec_match($filename,
                    $allowed_attachments,
                    file => $tempfile);
                last if $allowed;
            }
        }
        if (! $allowed) {
            error(gettext("attachment rejected")." ($allowed)");
        }

        # Needed for fast_file_copy and for rendering below.
        require IkiWiki::Render;

        # 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, @_);
            });
        }

        # Check the attachment in and trigger a wiki refresh.
        if ($config{rcs}) {
            IkiWiki::rcs_add($filename);
            IkiWiki::disable_commit_hook();
            IkiWiki::rcs_commit($filename, gettext("attachment upload"),
                IkiWiki::rcs_prepedit($filename),
                $session->param("name"), $ENV{REMOTE_ADDR});
            IkiWiki::enable_commit_hook();
            IkiWiki::rcs_update();
        }
        IkiWiki::refresh();
        IkiWiki::saveindex();
    }
} # }}}

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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