HTML compression

[manojLondhe]

Hi,

Is there a way to compress HTML o/p using some pages config?

[johanjanssens]

I am using a little event subscriber that can minify html. It makes use of:

• voku/HtmlMin for HTML
• matthiasmullie/minify for CSS/JS blocks

Because of these dependencies I haven't put it into the core yet. I prefer to keep the Pages core dependency free. Here is the code.

class ExtPagesEventSubscriberMinify extends ComPagesEventSubscriberAbstract
{
    protected function _initialize(KObjectConfig $config)
    {
        $config->append(array(
            'priority' => KEvent::PRIORITY_LOWEST,
            'enabled' => JDEBUG ? false : true,
        ));

        parent::_initialize($config);
    }

    public function onBeforeDispatcherSend(KEventInterface $event)
    {
        $content = $event->getTarget()->getResponse()->getContent();

        if($event->getTarget()->getRequest()->getFormat() == 'html')
        {
            //Filter our multiple spaces and html commments
            $htmlMin = new voku\helper\HtmlMin();
            $htmlMin->doOptimizeViaHtmlDomParser();
            $htmlMin->doRemoveComments();
            $htmlMin->doSumUpWhitespace();
            $htmlMin->doRemoveWhitespaceAroundTags();
            $htmlMin->doSortHtmlAttributes(false);
            $content = $htmlMin->minify($content);

            //Minify inline styles
            if(preg_match_all('#<style(.*)>(.*)</style>#siU', $content, $matches))
            {
                foreach($matches[2] as $key => $match)
                {
                    $minifier = new MatthiasMullie\Minify\CSS();
                    $minifier->add($match);

                    $content = str_replace($matches[2][$key], $minifier->minify(), $content);
                }
            }

            //Minify inline scripts
            if(preg_match_all('#<script(.*)>(.*)</script>#siU', $content, $matches))
            {
                $minifier = new MatthiasMullie\Minify\JS();

                foreach($matches[2] as $key => $match)
                {
                    $minifier = new MatthiasMullie\Minify\JS();
                    $minifier->add($match);

                    $content = str_replace($matches[2][$key], $minifier->minify(), $content);
                }
            }

            $event->getTarget()->getResponse()->setContent($content);
        }
    }

    public function isEnabled()
    {
        $result = false;

        if(class_exists('voku\helper\HtmlMin') && class_exists('MatthiasMullie\Minify\CSS') ) {
            $result = parent::isEnabled();
        }

        return $result;
    }
}