Magento: Minify HTML Output?

Question

Is there any file in magento where all html will be output?

I want to minify all html output.

Answer 1

Magento uses a response object to send all output.

All output is added to this object, and then its sendResponse method is called.

If you want to alter the output, setup a listener for the http_response_send_before event

    
        
            singleton
            group/observer
            alterOutput
        
    

And then in your observer you may get and set the body

class Packagename_Modulename_Model_Observer
{
    public function alterOutput($observer)
    {
        $response = $observer->getResponse();       
        $html     = $response->getBody();           
        //modify html here          
        $response->setBody($html);
    }
}

If you're interested, this event is called in the sendResponse method of the following class

app/code/core/Mage/Core/Controller/Response/Http.php

and the output itself is sent in the sendResponse and outputBody methods of

lib/Zend/Controller/Response/Abstract.php