After trying SSL and having some unfortunate problem with it, I decide to go back to HTTP. Everything seems find, by the
srcset attribute of
<img> tag is still https everywhere.
This post Wordpress: srcset gets HTTP instead of HTTPS in all posts asks for the opposite direction, but still provides me guides to diagnose. However:
wp-includes > media.php, I can find the
wp_calculate_image_srcsetmethod, but unable to find these two lines:
$image_baseurl = _wp_upload_dir_baseurl(); $image_baseurl = trailingslashit( $image_baseurl ) . $dirname;
siteurlalready have http values.
I also delete all cache. Still no help.
What else do I need to check? Here is my page: quảcầu.com.