5 files changed, 334 insertions, 0 deletions
diff --git a/lib/Net/FTP/A.pm b/lib/Net/FTP/A.pm
new file mode 100644
index 0000000..c117d69
--- /dev/null
+++ b/lib/Net/FTP/A.pm
@@ -0,0 +1,111 @@
+## 
+## Package to read/write on ASCII data connections
+##
+
+package Net::FTP::A;
+use strict;
+use vars qw(@ISA $buf $VERSION);
+use Carp;
+
+require Net::FTP::dataconn;
+
+@ISA     = qw(Net::FTP::dataconn);
+$VERSION = "1.19";
+
+
+sub read {
+  my $data = shift;
+  local *buf = \$_[0];
+  shift;
+  my $size = shift || croak 'read($buf,$size,[$offset])';
+  my $timeout = @_ ? shift: $data->timeout;
+
+  if (length(${*$data}) < $size && !${*$data}{'net_ftp_eof'}) {
+    my $blksize = ${*$data}{'net_ftp_blksize'};
+    $blksize = $size if $size > $blksize;
+
+    my $l = 0;
+    my $n;
+
+  READ:
+    {
+      my $readbuf = defined(${*$data}{'net_ftp_cr'}) ? "\015" : '';
+
+      $data->can_read($timeout)
+        or croak "Timeout";
+
+      if ($n = sysread($data, $readbuf, $blksize, length $readbuf)) {
+        ${*$data}{'net_ftp_bytesread'} += $n;
+        ${*$data}{'net_ftp_cr'} =
+          substr($readbuf, -1) eq "\015"
+          ? chop($readbuf)
+          : undef;
+      }
+      else {
+        return undef
+          unless defined $n;
+
+        ${*$data}{'net_ftp_eof'} = 1;
+      }
+
+      $readbuf =~ s/\015\012/\n/sgo;
+      ${*$data} .= $readbuf;
+
+      unless (length(${*$data})) {
+
+        redo READ
+          if ($n > 0);
+
+        $size = length(${*$data})
+          if ($n == 0);
+      }
+    }
+  }
+
+  $buf = substr(${*$data}, 0, $size);
+  substr(${*$data}, 0, $size) = '';
+
+  length $buf;
+}
+
+
+sub write {
+  my $data = shift;
+  local *buf = \$_[0];
+  shift;
+  my $size = shift || croak 'write($buf,$size,[$timeout])';
+  my $timeout = @_ ? shift: $data->timeout;
+
+  my $nr = (my $tmp = substr($buf, 0, $size)) =~ tr/\r\n/\015\012/;
+  $tmp =~ s/(?<!\015)\012/\015\012/sg if $nr;
+  $tmp =~ s/^\015// if ${*$data}{'net_ftp_outcr'};
+  ${*$data}{'net_ftp_outcr'} = substr($tmp, -1) eq "\015";
+
+  # If the remote server has closed the connection we will be signal'd
+  # when we write. This can happen if the disk on the remote server fills up
+
+  local $SIG{PIPE} = 'IGNORE'
+    unless ($SIG{PIPE} || '') eq 'IGNORE'
+    or $^O eq 'MacOS';
+
+  my $len   = length($tmp);
+  my $off   = 0;
+  my $wrote = 0;
+
+  my $blksize = ${*$data}{'net_ftp_blksize'};
+
+  while ($len) {
+    $data->can_write($timeout)
+      or croak "Timeout";
+
+    $off += $wrote;
+    $wrote = syswrite($data, substr($tmp, $off), $len > $blksize ? $blksize : $len);
+    return undef
+      unless defined($wrote);
+    $len -= $wrote;
+  }
+
+  $size;
+}
+
+1;
diff --git a/lib/Net/FTP/E.pm b/lib/Net/FTP/E.pm
new file mode 100644
index 0000000..d480cd7
--- /dev/null
+++ b/lib/Net/FTP/E.pm
@@ -0,0 +1,8 @@
+package Net::FTP::E;
+
+require Net::FTP::I;
+
+@ISA = qw(Net::FTP::I);
+$VERSION = "0.01";
+
+1;
diff --git a/lib/Net/FTP/I.pm b/lib/Net/FTP/I.pm
new file mode 100644
index 0000000..449bb99
--- /dev/null
+++ b/lib/Net/FTP/I.pm
@@ -0,0 +1,80 @@
+## 
+## Package to read/write on BINARY data connections
+##
+
+package Net::FTP::I;
+
+use vars qw(@ISA $buf $VERSION);
+use Carp;
+
+require Net::FTP::dataconn;
+
+@ISA     = qw(Net::FTP::dataconn);
+$VERSION = "1.12";
+
+
+sub read {
+  my $data = shift;
+  local *buf = \$_[0];
+  shift;
+  my $size = shift || croak 'read($buf,$size,[$timeout])';
+  my $timeout = @_ ? shift: $data->timeout;
+
+  my $n;
+
+  if ($size > length ${*$data} and !${*$data}{'net_ftp_eof'}) {
+    $data->can_read($timeout)
+      or croak "Timeout";
+
+    my $blksize = ${*$data}{'net_ftp_blksize'};
+    $blksize = $size if $size > $blksize;
+
+    unless ($n = sysread($data, ${*$data}, $blksize, length ${*$data})) {
+      return undef unless defined $n;
+      ${*$data}{'net_ftp_eof'} = 1;
+    }
+  }
+
+  $buf = substr(${*$data}, 0, $size);
+
+  $n = length($buf);
+
+  substr(${*$data}, 0, $n) = '';
+
+  ${*$data}{'net_ftp_bytesread'} += $n;
+
+  $n;
+}
+
+
+sub write {
+  my $data = shift;
+  local *buf = \$_[0];
+  shift;
+  my $size = shift || croak 'write($buf,$size,[$timeout])';
+  my $timeout = @_ ? shift: $data->timeout;
+
+  # If the remote server has closed the connection we will be signal'd
+  # when we write. This can happen if the disk on the remote server fills up
+
+  local $SIG{PIPE} = 'IGNORE'
+    unless ($SIG{PIPE} || '') eq 'IGNORE'
+    or $^O eq 'MacOS';
+  my $sent = $size;
+  my $off  = 0;
+
+  my $blksize = ${*$data}{'net_ftp_blksize'};
+  while ($sent > 0) {
+    $data->can_write($timeout)
+      or croak "Timeout";
+
+    my $n = syswrite($data, $buf, $sent > $blksize ? $blksize : $sent, $off);
+    return undef unless defined($n);
+    $sent -= $n;
+    $off += $n;
+  }
+
+  $size;
+}
+
+1;
diff --git a/lib/Net/FTP/L.pm b/lib/Net/FTP/L.pm
new file mode 100644
index 0000000..f7423cb
--- /dev/null
+++ b/lib/Net/FTP/L.pm
@@ -0,0 +1,8 @@
+package Net::FTP::L;
+
+require Net::FTP::I;
+
+@ISA = qw(Net::FTP::I);
+$VERSION = "0.01";
+
+1;
diff --git a/lib/Net/FTP/dataconn.pm b/lib/Net/FTP/dataconn.pm
new file mode 100644
index 0000000..3f93668
--- /dev/null
+++ b/lib/Net/FTP/dataconn.pm
@@ -0,0 +1,127 @@
+##
+## Generic data connection package
+##
+
+package Net::FTP::dataconn;
+
+use Carp;
+use vars qw(@ISA $timeout $VERSION);
+use Net::Cmd;
+use Errno;
+
+$VERSION = '0.12';
+@ISA     = qw(IO::Socket::INET);
+
+
+sub reading {
+  my $data = shift;
+  ${*$data}{'net_ftp_bytesread'} = 0;
+}
+
+
+sub abort {
+  my $data = shift;
+  my $ftp  = ${*$data}{'net_ftp_cmd'};
+
+  # no need to abort if we have finished the xfer
+  return $data->close
+    if ${*$data}{'net_ftp_eof'};
+
+  # for some reason if we continuously open RETR connections and not
+  # read a single byte, then abort them after a while the server will
+  # close our connection, this prevents the unexpected EOF on the
+  # command channel -- GMB
+  if (exists ${*$data}{'net_ftp_bytesread'}
+    && (${*$data}{'net_ftp_bytesread'} == 0))
+  {
+    my $buf     = "";
+    my $timeout = $data->timeout;
+    $data->can_read($timeout) && sysread($data, $buf, 1);
+  }
+
+  ${*$data}{'net_ftp_eof'} = 1;    # fake
+
+  $ftp->abort;                     # this will close me
+}
+
+
+sub _close {
+  my $data = shift;
+  my $ftp  = ${*$data}{'net_ftp_cmd'};
+
+  $data->SUPER::close();
+
+  delete ${*$ftp}{'net_ftp_dataconn'}
+    if defined $ftp
+    && exists ${*$ftp}{'net_ftp_dataconn'}
+    && $data == ${*$ftp}{'net_ftp_dataconn'};
+}
+
+
+sub close {
+  my $data = shift;
+  my $ftp  = ${*$data}{'net_ftp_cmd'};
+
+  if (exists ${*$data}{'net_ftp_bytesread'} && !${*$data}{'net_ftp_eof'}) {
+    my $junk;
+    eval { local($SIG{__DIE__}); $data->read($junk, 1, 0) };
+    return $data->abort unless ${*$data}{'net_ftp_eof'};
+  }
+
+  $data->_close;
+
+  return unless defined $ftp;
+
+  $ftp->response() == CMD_OK
+    && $ftp->message =~ /unique file name:\s*(\S*)\s*\)/
+    && (${*$ftp}{'net_ftp_unique'} = $1);
+
+  $ftp->status == CMD_OK;
+}
+
+
+sub _select {
+  my ($data, $timeout, $do_read) = @_;
+  my ($rin, $rout, $win, $wout, $tout, $nfound);
+
+  vec($rin = '', fileno($data), 1) = 1;
+
+  ($win, $rin) = ($rin, $win) unless $do_read;
+
+  while (1) {
+    $nfound = select($rout = $rin, $wout = $win, undef, $tout = $timeout);
+
+    last if $nfound >= 0;
+
+    croak "select: $!"
+      unless $!{EINTR};
+  }
+
+  $nfound;
+}
+
+
+sub can_read {
+  _select(@_[0, 1], 1);
+}
+
+
+sub can_write {
+  _select(@_[0, 1], 0);
+}
+
+
+sub cmd {
+  my $ftp = shift;
+
+  ${*$ftp}{'net_ftp_cmd'};
+}
+
+
+sub bytes_read {
+  my $ftp = shift;
+
+  ${*$ftp}{'net_ftp_bytesread'} || 0;
+}
+
+1;