Use content type of the downloaded resource to select the backend for its handling

* lib/SlackBuild/Archive/Extractor.pm (_backend): Use
archive->downloaded_html to select the backend.
* lib/SlackBuild/Archive/Extractor/HTTP.pm (extract): Use
$uri->downloaded_html instead of is_html.
(is_html): Remove.
* lib/SlackBuild/URI.pm (downloaded_html): New method.

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/SlackBuild/URI.pm b/lib/SlackBuild/URI.pm
index adaeca4..60b6b26 100644
--- a/lib/SlackBuild/URI.pm
+++ b/lib/SlackBuild/URI.pm
@@ -87,5 +87,10 @@ sub download_status {
     my $self = shift;
     return $self->download_response->status_line;
 }
-    
+
+sub downloaded_html {
+    my $self = shift;
+    return $self->download_response->content_type =~ m{^(?:application/xhtml\+xml|text/(?:css|html))$};
+}
+
 1;