Ensure only HTML responses are optimized #1189
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westonruter
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[Type] Bug
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| foreach ( $headers_list as $header ) { | ||
| $header_parts = preg_split( '/\s*[:;]\s*/', strtolower( $header ) ); | ||
| if ( count( $header_parts ) >= 2 && 'content-type' === $header_parts[0] ) { | ||
| $is_html_content_type = in_array( $header_parts[1], array( 'text/html', 'application/xhtml+xml' ), true ); |
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Note the application/xhtml+xml may be overkill per GoogleChromeLabs/wpp-research#74, but I added it for completeness.
| headers_list() | ||
| ); | ||
| foreach ( $headers_list as $header ) { | ||
| $header_parts = preg_split( '/\s*[:;]\s*/', strtolower( $header ) ); |
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Splitting on : and ; here will result in Content-Type: text/html; charset=utf-8 being split as [ 'content-type', 'text/html', 'charset=utf-8' ]. We then only use the first two items in the array.
I realized in WordPress/gutenberg#61212 that Optimization Detective is currently attempting to optimize all frontend responses, including those which may not be HTML. (This does not apply to feeds or robots.txt, as it only is relevant when
template-loader.phpgets to filteringtemplate_include.) For example, a plugin may decide to render an XML response instead for a template. These should be ignored from optimization.