1 | ## $Id: //depot/libnet/Net/FTP/A.pm#17 $
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2 | ## Package to read/write on ASCII data connections
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3 | ##
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4 |
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5 | package Net::FTP::A;
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6 | use strict;
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7 | use vars qw(@ISA $buf $VERSION);
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8 | use Carp;
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9 |
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10 | require Net::FTP::dataconn;
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11 |
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12 | @ISA = qw(Net::FTP::dataconn);
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13 | $VERSION = "1.16";
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14 |
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15 | sub read {
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16 | my $data = shift;
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17 | local *buf = \$_[0]; shift;
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18 | my $size = shift || croak 'read($buf,$size,[$offset])';
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19 | my $timeout = @_ ? shift : $data->timeout;
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20 |
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21 | if (length(${*$data}) < $size && !${*$data}{'net_ftp_eof'}) {
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22 | my $blksize = ${*$data}{'net_ftp_blksize'};
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23 | $blksize = $size if $size > $blksize;
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24 |
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25 | my $l = 0;
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26 | my $n;
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27 |
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28 | READ:
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29 | {
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30 | my $readbuf = defined(${*$data}{'net_ftp_cr'}) ? "\015" : '';
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31 |
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32 | $data->can_read($timeout) or
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33 | croak "Timeout";
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34 |
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35 | if ($n = sysread($data, $readbuf, $blksize, length $readbuf)) {
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36 | ${*$data}{'net_ftp_bytesread'} += $n;
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37 | ${*$data}{'net_ftp_cr'} = substr($readbuf,-1) eq "\015"
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38 | ? chop($readbuf)
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39 | : undef;
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40 | }
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41 | else {
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42 | return undef
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43 | unless defined $n;
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44 |
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45 | ${*$data}{'net_ftp_eof'} = 1;
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46 | }
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47 |
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48 | $readbuf =~ s/\015\012/\n/sgo;
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49 | ${*$data} .= $readbuf;
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50 |
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51 | unless (length(${*$data})) {
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52 |
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53 | redo READ
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54 | if($n > 0);
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55 |
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56 | $size = length(${*$data})
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57 | if($n == 0);
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58 | }
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59 | }
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60 | }
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61 |
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62 | $buf = substr(${*$data},0,$size);
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63 | substr(${*$data},0,$size) = '';
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64 |
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65 | length $buf;
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66 | }
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67 |
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68 | sub write {
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69 | my $data = shift;
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70 | local *buf = \$_[0]; shift;
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71 | my $size = shift || croak 'write($buf,$size,[$timeout])';
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72 | my $timeout = @_ ? shift : $data->timeout;
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73 |
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74 | (my $tmp = substr($buf,0,$size)) =~ s/\r?\n/\015\012/sg;
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75 |
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76 | # If the remote server has closed the connection we will be signal'd
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77 | # when we write. This can happen if the disk on the remote server fills up
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78 |
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79 | local $SIG{PIPE} = 'IGNORE' unless $^O eq 'MacOS';
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80 |
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81 | my $len = length($tmp);
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82 | my $off = 0;
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83 | my $wrote = 0;
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84 |
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85 | my $blksize = ${*$data}{'net_ftp_blksize'};
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86 |
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87 | while($len) {
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88 | $data->can_write($timeout) or
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89 | croak "Timeout";
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90 |
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91 | $off += $wrote;
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92 | $wrote = syswrite($data, substr($tmp,$off), $len > $blksize ? $blksize : $len);
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93 | return undef
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94 | unless defined($wrote);
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95 | $len -= $wrote;
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96 | }
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97 |
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98 | $size;
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99 | }
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100 |
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101 | 1;
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