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Upload: Fix the final file name collision test in `wp_unique_filename()` when uploading a file with upper case extension. Add a unit test to catch that in the future. 

Fixes #48975 for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@46966 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz 2019-12-16 23:42:34 +00:00
parent 735b3543db
commit 99ef48a585
2 changed files with 15 additions and 3 deletions
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16
src/wp-includes/functions.php
View File

@ -2410,6 +2410,7 @@ function _wp_upload_dir( $time = null ) {
function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
// Sanitize the file name before we begin processing.
$filename = sanitize_file_name( $filename );
$ext2 = null;
// Separate the filename into a name and extension.
$ext = pathinfo( $filename, PATHINFO_EXTENSION );
@ -2485,10 +2486,19 @@ function wp_unique_filename( $dir, $filename, $unique_filename_callback = null )
}
if ( ! empty( $files ) ) {
while ( _wp_check_existing_file_names( $filename, $files ) ) {
// The extension case may have changed above.
$new_ext = ! empty( $ext2 ) ? $ext2 : $ext;
// Ensure this never goes into infinite loop
// as it uses pathinfo() and regex in the check but string replacement for the changes.
$count = count( $files );
$i = 1;
while ( $i <= $count && _wp_check_existing_file_names( $filename, $files ) ) {
$new_number = (int) $number + 1;
$filename = str_replace( array( "-{$number}{$ext}", "{$number}{$ext}" ), "-{$new_number}{$ext}", $filename );
$filename = str_replace( array( "-{$number}{$new_ext}", "{$number}{$new_ext}" ), "-{$new_number}{$new_ext}", $filename );
$number = $new_number;
$i++;
}
}
}
@ -2530,7 +2540,7 @@ function _wp_check_existing_file_names( $filename, $files ) {
$ext = ".$ext";
}
$regex = '/^' . preg_quote( $fname ) . '-(?:\d+x\d+|scaled|rotated)' . preg_quote( $ext ) . '$/';
$regex = '/^' . preg_quote( $fname ) . '-(?:\d+x\d+|scaled|rotated)' . preg_quote( $ext ) . '$/i';
foreach ( $files as $file ) {
if ( preg_match( $regex, $file ) ) {

2
tests/phpunit/tests/functions.php
View File

@ -208,6 +208,8 @@ class Tests_Functions extends WP_UnitTestCase {
// Test collision with existing sub-size filename.
// Existing files: one-blue-pixel-100x100.png, one-blue-pixel-1-100x100.png.
$this->assertEquals( 'one-blue-pixel-2.png', wp_unique_filename( $testdir, 'one-blue-pixel.png' ) );
// Same as above with upper case extension.
$this->assertEquals( 'one-blue-pixel-2.png', wp_unique_filename( $testdir, 'one-blue-pixel.PNG' ) );
remove_filter( 'upload_dir', array( $this, 'upload_dir_patch_basedir' ) );
}