middleware.rb in pdfkit-0.8.7.1

- old
+ new

@@ -20,11 +20,12 @@
 
       set_request_to_render_as_pdf(env) if render_as_pdf?
       status, headers, response = @app.call(env)
 
       begin
-        if rendering_pdf? && headers['content-type'] =~ /text\/html|application\/xhtml\+xml/
+        content_type_header = headers.has_key?('Content-Type') ? 'Content-Type' : 'content-type'
+        if rendering_pdf? && headers[content_type_header] =~ /text\/html|application\/xhtml\+xml/
           body = response.respond_to?(:body) ? response.body : response.join
           body = body.join if body.is_a?(Array)
 
           root_url = root_url(env)
           protocol = protocol(env)
@@ -47,10 +48,10 @@
             headers.delete('etag')
             headers.delete('cache-control')
           end
 
           headers['content-length'] = (body.respond_to?(:bytesize) ? body.bytesize : body.size).to_s
-          headers['content-type']   = 'application/pdf'
+          headers[content_type_header]   = 'application/pdf'
           headers['content-disposition'] ||= @conditions[:disposition] || 'inline'
         end
       rescue StandardError => e
         status = 500
         response = [e.message]