[wp-trac] [WordPress Trac] #28013: WP_Filesystem_FTPext::exists($filename) returns false when file exists on FTP Service ( IIS/6.0 Microsoft & Linux/vsftp )

[WordPress Trac]

#28013: WP_Filesystem_FTPext::exists($filename) returns false when file exists on
FTP Service ( IIS/6.0 Microsoft & Linux/vsftp )
----------------------------+-----------------------------
 Reporter:  joostdekeijzer  |       Owner:  dd32
     Type:  defect (bug)    |      Status:  reopened
 Priority:  normal          |   Milestone:  4.4
Component:  Filesystem API  |     Version:  3.9.2
 Severity:  normal          |  Resolution:
 Keywords:  has-patch       |     Focuses:  administration
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Comment (by dd32):

 Thanks for the feedback @mmucklo!

 > The reason it fails is that you're passing in a $file into a command
 that seems to require a directory as it's argument. I may be wrong here,
 however when I pass in dirname($file) into the former command, things work
 fine.

 When a file is presented, a FTP server that respects the protocol is
 supposed to return information about that file (Ignore whatever the PHP
 docs suggest here), unfortunately there are a number of FTP servers out
 there which obviously do not conform to spec.

 The alternative solution, as you suggest, is to list the contents of the
 directory above it to determine if the file is present.
 Can you try switching out the exists method for this one?
 {{{
         public function exists( $file ) {
                 $path = dirname( $file );
                 $filename = basename( $file );

                 $file_list = @ftp_nlist( $this->link, '-a ' . $path );

                 return $list && in_array( $filename, $file_list );
         }
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/28013#comment:10>
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