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1 | ## |
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2 | ## Package to read/write on ASCII data connections |
3 | ## |
4 | |
5 | package Net::FTP::A; |
6 | use strict; |
7 | use vars qw(@ISA $buf $VERSION); |
8 | use Carp; |
9 | |
10 | require Net::FTP::dataconn; |
11 | |
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12 | @ISA = qw(Net::FTP::dataconn); |
13 | $VERSION = "1.18"; |
14 | |
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15 | |
16 | sub read { |
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17 | my $data = shift; |
18 | local *buf = \$_[0]; |
19 | shift; |
20 | my $size = shift || croak 'read($buf,$size,[$offset])'; |
21 | my $timeout = @_ ? shift: $data->timeout; |
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22 | |
23 | if (length(${*$data}) < $size && !${*$data}{'net_ftp_eof'}) { |
24 | my $blksize = ${*$data}{'net_ftp_blksize'}; |
25 | $blksize = $size if $size > $blksize; |
26 | |
27 | my $l = 0; |
28 | my $n; |
29 | |
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30 | READ: |
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31 | { |
32 | my $readbuf = defined(${*$data}{'net_ftp_cr'}) ? "\015" : ''; |
33 | |
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34 | $data->can_read($timeout) |
35 | or croak "Timeout"; |
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36 | |
37 | if ($n = sysread($data, $readbuf, $blksize, length $readbuf)) { |
38 | ${*$data}{'net_ftp_bytesread'} += $n; |
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39 | ${*$data}{'net_ftp_cr'} = |
40 | substr($readbuf, -1) eq "\015" |
41 | ? chop($readbuf) |
42 | : undef; |
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43 | } |
44 | else { |
45 | return undef |
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46 | unless defined $n; |
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47 | |
48 | ${*$data}{'net_ftp_eof'} = 1; |
49 | } |
50 | |
51 | $readbuf =~ s/\015\012/\n/sgo; |
52 | ${*$data} .= $readbuf; |
53 | |
54 | unless (length(${*$data})) { |
55 | |
56 | redo READ |
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57 | if ($n > 0); |
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58 | |
59 | $size = length(${*$data}) |
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60 | if ($n == 0); |
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61 | } |
62 | } |
63 | } |
64 | |
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65 | $buf = substr(${*$data}, 0, $size); |
66 | substr(${*$data}, 0, $size) = ''; |
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67 | |
68 | length $buf; |
69 | } |
70 | |
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71 | |
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72 | sub write { |
73 | my $data = shift; |
74 | local *buf = \$_[0]; |
75 | shift; |
76 | my $size = shift || croak 'write($buf,$size,[$timeout])'; |
77 | my $timeout = @_ ? shift: $data->timeout; |
78 | |
79 | my $nr = (my $tmp = substr($buf, 0, $size)) =~ tr/\r\n/\015\012/; |
80 | $tmp =~ s/([^\015])\012/$1\015\012/sg if $nr; |
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81 | $tmp =~ s/^\012/\015\012/ unless ${*$data}{'net_ftp_outcr'}; |
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82 | ${*$data}{'net_ftp_outcr'} = substr($tmp, -1) eq "\015"; |
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83 | |
84 | # If the remote server has closed the connection we will be signal'd |
85 | # when we write. This can happen if the disk on the remote server fills up |
86 | |
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87 | local $SIG{PIPE} = 'IGNORE' |
88 | unless ($SIG{PIPE} || '') eq 'IGNORE' |
89 | or $^O eq 'MacOS'; |
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90 | |
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91 | my $len = length($tmp); |
92 | my $off = 0; |
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93 | my $wrote = 0; |
94 | |
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95 | my $blksize = ${*$data}{'net_ftp_blksize'}; |
96 | |
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97 | while ($len) { |
98 | $data->can_write($timeout) |
99 | or croak "Timeout"; |
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100 | |
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101 | $off += $wrote; |
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102 | $wrote = syswrite($data, substr($tmp, $off), $len > $blksize ? $blksize : $len); |
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103 | return undef |
104 | unless defined($wrote); |
105 | $len -= $wrote; |
106 | } |
107 | |
108 | $size; |
109 | } |
110 | |
111 | 1; |