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./othercms/xenForo 2.2.8/src/XF/Pub/View/Error/EmbeddedImageRequest.php
<?php

namespace XF\Pub\View\Error;


class
EmbeddedImageRequest extends \XF\Mvc\View
{
    public function
renderRaw()
    {
       
$response = $this->response;

       
$response->contentType('image/png', '')
            ->
setDownloadFileName('invalid_image_request.png', true);

       
$response->header('X-XF-Error', 'unexpected_embedded_image_request');

        return
$response->responseFile(\XF::getRootDirectory() . '/styles/default/xenforo/missing-image.png');
    }
}