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Upload: Fix upload failures of common text file types.
This adds some special case handling in 'wp_check_filetype_and_ext()' that prevents some common file types from being blocked based on mismatched MIME checks, which were made more strict in WordPress 5.0.1. Merges [44438], [44439], [44441], and [44442] to the 4.9 branch. Props Kloon, birgire, tellyworth, joemcgill. See #45615. Built from https://develop.svn.wordpress.org/branches/5.0@44443 git-svn-id: http://core.svn.wordpress.org/branches/5.0@44274 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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dd2338ad41
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wp-includes
@ -2373,10 +2373,37 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
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* This means that common mismatches are forgiven: application/vnd.apple.numbers is often misidentified as application/zip,
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* and some media files are commonly named with the wrong extension (.mov instead of .mp4)
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*/
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if ( substr( $real_mime, 0, strcspn( $real_mime, '/' ) ) !== substr( $type, 0, strcspn( $type, '/' ) ) ) {
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$type = $ext = false;
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}
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} elseif ( 'text/plain' === $real_mime ) {
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// A few common file types are occasionally detected as text/plain; allow those.
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if ( ! in_array(
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$type,
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array(
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'text/plain',
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'text/csv',
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'text/richtext',
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'text/tsv',
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'text/vtt',
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)
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)
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) {
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$type = $ext = false;
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}
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} elseif ( 'text/rtf' === $real_mime ) {
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// Special casing for RTF files.
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if ( ! in_array(
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$type,
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array(
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'text/rtf',
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'text/plain',
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'application/rtf',
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)
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)
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) {
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$type = $ext = false;
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}
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} else {
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if ( $type !== $real_mime ) {
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/*
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@ -4,7 +4,7 @@
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*
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* @global string $wp_version
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*/
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$wp_version = '5.0.3-alpha-44440';
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$wp_version = '5.0.3-alpha-44443';
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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