+sub match_mimetype ($$;@) { #{{{
+ shift;
+ my $wanted=shift;
+
+ my %params=@_;
+ if (! exists $params{file}) {
+ return IkiWiki::FailReason->new("no file specified");
+ }
+
+ # Use ::magic to get the mime type, the idea is to only trust
+ # data obtained by examining the actual file contents.
+ eval q{use File::MimeInfo::Magic};
+ if ($@) {
+ return IkiWiki::FailReason->new("failed to load File::MimeInfo::Magic ($@); cannot check MIME type");
+ }
+ my $mimetype=File::MimeInfo::Magic::magic($params{file});
+ if (! defined $mimetype) {
+ $mimetype="unknown";
+ }
+
+ my $regexp=IkiWiki::glob2re($wanted);
+ if ($mimetype!~/^$regexp$/i) {
+ return IkiWiki::FailReason->new("file MIME type is $mimetype, not $wanted");
+ }
+ else {
+ return IkiWiki::SuccessReason->new("file MIME type is $mimetype");
+ }
+} #}}}
+
+sub match_virusfree ($$;@) { #{{{
+ shift;
+ my $wanted=shift;
+
+ my %params=@_;
+ if (! exists $params{file}) {
+ return IkiWiki::FailReason->new("no file specified");
+ }
+
+ if (! exists $IkiWiki::config{virus_checker} ||
+ ! length $IkiWiki::config{virus_checker}) {
+ return IkiWiki::FailReason->new("no virus_checker configured");
+ }
+
+ # The file needs to be fed into the virus checker on stdin,
+ # because the file is not world-readable, and if clamdscan is
+ # used, clamd would fail to read it.
+ eval q{use IPC::Open2};
+ error($@) if $@;
+ open (IN, "<", $params{file}) || return IkiWiki::FailReason->new("failed to read file");
+ binmode(IN);
+ my $sigpipe=0;
+ $SIG{PIPE} = sub { $sigpipe=1 };
+ my $pid=open2(\*CHECKER_OUT, "<&IN", $IkiWiki::config{virus_checker});
+ my $reason=<CHECKER_OUT>;
+ chomp $reason;
+ 1 while (<CHECKER_OUT>);
+ close(CHECKER_OUT);
+ waitpid $pid, 0;
+ $SIG{PIPE}="DEFAULT";
+ if ($sigpipe || $?) {
+ if (! length $reason) {
+ $reason="virus checker $IkiWiki::config{virus_checker}; failed with no output";
+ }
+ return IkiWiki::FailReason->new("file seems to contain a virus ($reason)");
+ }
+ else {
+ return IkiWiki::SuccessReason->new("file seems virusfree ($reason)");
+ }
+} #}}}
+