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Filesystem: Rewrite FTP/FTP Sockets exists() methods to implement a more stable check.

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WordPress FTP file checking was previously based upon `ftp_nlist()`. This function can be problematic at scale with a directory containing a large number of files. The same issue occurred using it with ftpsockets.

This changeset rewrites the FTP `exists()` functions to utilize a more efficient and stable check.

Props giox069, desrosj, mkox, afragen, costdev, pbiron, peterwilsoncc.
Fixes #51170.
See #53318, #39781.

Built from https://develop.svn.wordpress.org/trunk@53860


git-svn-id: http://core.svn.wordpress.org/trunk@53419 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
audrasjb 2022-08-08 12:41:13 +00:00
parent af08ed758d
commit 6a5506304e
3 changed files with 12 additions and 13 deletions
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13
wp-admin/includes/class-wp-filesystem-ftpext.php
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@ -412,18 +412,18 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
* Checks if a file or directory exists.
*
* @since 2.5.0
* @since 6.1.0 Rewrite using ftp_rawlist, uses 'LIST' on FTP server
* takes file path or directory path as parameter.
*
* @param string $file Path to file or directory.
* @return bool Whether $file exists or not.
*/
public function exists( $file ) {
$list = ftp_nlist( $this->link, $file );
if ( empty( $list ) && $this->is_dir( $file ) ) {
return true; // File is an empty directory.
if ( $this->is_dir( $file ) ) {
return true;
}
return ! empty( $list ); // Empty list = no file, so invert.
return ! empty( ftp_rawlist( $this->link, $file ) );
}
/**
@ -510,9 +510,10 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
* Gets the file size (in bytes).
*
* @since 2.5.0
* @since 6.1.0 Update for proper return values.
*
* @param string $file Path to file.
* @return int|false Size of the file in bytes on success, false on failure.
* @return int Size of the file in bytes on success, -1 on failure.
*/
public function size( $file ) {
return ftp_size( $this->link, $file );

10
wp-admin/includes/class-wp-filesystem-ftpsockets.php
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@ -414,19 +414,17 @@ class WP_Filesystem_ftpsockets extends WP_Filesystem_Base {
* Checks if a file or directory exists.
*
* @since 2.5.0
* @since 6.1.0 Rewrite using file size.
*
* @param string $file Path to file or directory.
* @return bool Whether $file exists or not.
*/
public function exists( $file ) {
$list = $this->ftp->nlist( $file );
if ( empty( $list ) && $this->is_dir( $file ) ) {
return true; // File is an empty directory.
if ( $this->is_dir( $file ) ) {
return true;
}
return ! empty( $list ); // Empty list = no file, so invert.
// Return $this->ftp->is_exists($file); has issues with ABOR+426 responses on the ncFTPd server.
return is_numeric( $this->size( $file ) );
}
/**

2
wp-includes/version.php
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@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.1-alpha-53859';
$wp_version = '6.1-alpha-53860';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.