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## $Id: //depot/libnet/Net/FTP/A.pm#17 $ |
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## Package to read/write on ASCII data connections |
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## |
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package Net::FTP::A; |
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use strict; |
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use vars qw(@ISA $buf $VERSION); |
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use Carp; |
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require Net::FTP::dataconn; |
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@ISA = qw(Net::FTP::dataconn); |
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$VERSION = "1.16"; |
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sub read { |
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my $data = shift; |
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local *buf = \$_[0]; shift; |
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my $size = shift || croak 'read($buf,$size,[$offset])'; |
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my $timeout = @_ ? shift : $data->timeout; |
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if (length(${*$data}) < $size && !${*$data}{'net_ftp_eof'}) { |
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my $blksize = ${*$data}{'net_ftp_blksize'}; |
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$blksize = $size if $size > $blksize; |
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my $l = 0; |
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my $n; |
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READ: |
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{ |
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my $readbuf = defined(${*$data}{'net_ftp_cr'}) ? "\015" : ''; |
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$data->can_read($timeout) or |
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croak "Timeout"; |
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if ($n = sysread($data, $readbuf, $blksize, length $readbuf)) { |
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${*$data}{'net_ftp_bytesread'} += $n; |
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${*$data}{'net_ftp_cr'} = substr($readbuf,-1) eq "\015" |
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? chop($readbuf) |
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: undef; |
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} |
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else { |
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return undef |
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unless defined $n; |
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${*$data}{'net_ftp_eof'} = 1; |
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} |
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$readbuf =~ s/\015\012/\n/sgo; |
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${*$data} .= $readbuf; |
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unless (length(${*$data})) { |
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redo READ |
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if($n > 0); |
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$size = length(${*$data}) |
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if($n == 0); |
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} |
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} |
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} |
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$buf = substr(${*$data},0,$size); |
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substr(${*$data},0,$size) = ''; |
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length $buf; |
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} |
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sub write { |
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my $data = shift; |
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local *buf = \$_[0]; shift; |
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my $size = shift || croak 'write($buf,$size,[$timeout])'; |
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my $timeout = @_ ? shift : $data->timeout; |
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(my $tmp = substr($buf,0,$size)) =~ s/\r?\n/\015\012/sg; |
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# If the remote server has closed the connection we will be signal'd |
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# when we write. This can happen if the disk on the remote server fills up |
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local $SIG{PIPE} = 'IGNORE' unless $^O eq 'MacOS'; |
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my $len = length($tmp); |
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my $off = 0; |
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my $wrote = 0; |
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my $blksize = ${*$data}{'net_ftp_blksize'}; |
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while($len) { |
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$data->can_write($timeout) or |
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croak "Timeout"; |
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$off += $wrote; |
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$wrote = syswrite($data, substr($tmp,$off), $len > $blksize ? $blksize : $len); |
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return undef |
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unless defined($wrote); |
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$len -= $wrote; |
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} |
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$size; |
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} |
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1; |
