Perl Net::FTP::Recursive: Can't download folder but files of subfolders - perl

Question

I succeed to download files from a subfolder of the ftp-server. But if I want to download the folders from upper level it does not work.
Here is the folder structure:
folder rwx r-x r-x
subfolder1 rwx r-x r-x
file1 rw- r-- r--
file2 rw- r-- r--
subfolder2 rxx r-x r-x
file3 rw- r-- r--
file4 rw- r-- r--
If I use this:
$f1->cwd("/folder/subfolder1");
$f1->rget();
$f1->quit;
the files file1 and file2 will be downloaded.
If I use this:
$f1->cwd("/folder");
$f1->rget();
$f1->quit;
nothing will be downloaded and the program finished due to timeout. I expected that it will download subfolder1 and subfolder2 and the content of the subfolders. Is there any explanation for this and how can I solve it in the way that I can download subfolder and files?
A detailled description of the code is here
UPDATE 1: Debugging
Debugging with
my $f1 = Net::FTP::Recursive->new($host1, Debug => 1) or die "Can't open $host1\n";
gives the following:
Net::FTP::Recursive=GLOB(0x312bf50)>>> CWD /folder
Net::FTP::Recursive=GLOB(0x312bf50)<<< 250 CWD command successful
Net::FTP::Recursive=GLOB(0x312bf50)>>> PWD
Net::FTP::Recursive=GLOB(0x312bf50)<<< 257 "/folder" is the current directory
Net::FTP::Recursive=GLOB(0x312bf50)>>> PASV
Net::FTP::Recursive=GLOB(0x312bf50)<<< 227 Entering Passive Mode (188,40,220,103,255,187).
Net::FTP::Recursive=GLOB(0x312bf50)>>> LIST
Net::FTP::Recursive=GLOB(0x312bf50)<<< 150 Opening BINARY mode data connection for file list
Timeout at C:/Strawberry/perl/lib/Net/FTP.pm line 1107.
UPDATE 2: Timeout at C:/Strawberry/perl/lib/Net/FTP.pm line 1107.
_list_cmd is the function of the line mentioned in the debug output. I also add the lines where _list_cmdis used and wrapped lines to make it more readible conserving line numbers.
671 # Try to delete the contents
672 # Get a list of all the files in the directory, excluding
# the current and parent directories
673 my #filelist = map { /^(?:\S+;)+ (.+)$/ ? ($1) : () }
grep { !/^(?:\S+;)*type=[cp]dir;/i } $ftp->_list_cmd("MLSD", $dir);
925 sub ls { shift->_list_cmd("NLST", #_); }
925 sub dir { shift->_list_cmd("LIST", #_); }
1087 sub _list_cmd {
1088 my $ftp = shift;
1089 my $cmd = uc shift;
1090
1091 delete ${*$ftp}{'net_ftp_port'};
1092 delete ${*$ftp}{'net_ftp_pasv'};
1093
1094 my $data = $ftp->_data_cmd($cmd, #_);
1095
1096 return
1097 unless (defined $data);
1098
1099 require Net::FTP::A;
1100 bless $data, "Net::FTP::A"; # Force ASCII mode
1101
1102 my $databuf = '';
1103 my $buf = '';
1104 my $blksize = ${*$ftp}{'net_ftp_blksize'};
1105
1106 while ($data->read($databuf, $blksize)) {
1107 $buf .= $databuf;
1108 }
1109
1110 my $list = [split(/\n/, $buf)];
1111
1112 $data->close();
1114 if (EBCDIC) {
1115 for (#$list) { $_ = $ftp->toebcdic($_) }
1116 }
1117
1118 wantarray
1119 ? #{$list}
1120 : $list;
1121 }

Answer 1

To download the directories and files a tried the following workaround: using a loop over all subdirectory and appyling rget. It does the job I want. Nevertheless, the reason why rget does not work on the upper level is still not answered. At least now it is clear that it is not a permission probplem.
# ftp-server directory
my $ftpdir = "folder";
# Defie local download folder
my $download = "C:/local";
chdir($download);
# Change to remote directory
$f1->cwd($ftpdir) or die "Can't cwd to $ftpdir\n", $f1->message;
# grep all folder of top level
my #ftp_directories = $f1->ls;
# remove . and ..
#ftp_subdir = grep ! /^\.+$/, #ftp_subdir;
foreach my $sd (#ftp_subdir) {
# Make folder on local computer
my $localdir = catfile($download,$sd);
mkdir $localdir;
# Change local working directory
chdir $localdir;
# Change to remote sub directory to be downloaded
$f1->cwd($sd) or die "Can't cwd to $sd\n";
}
# download files
$f1->rget();
# Change to upper level
$f1->cwd("..");
}
$f1->quit;