/usr/share/perl5/Net/HTTP/NB.pm is in libnet-http-perl 6.06-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | package Net::HTTP::NB;
use strict;
use vars qw($VERSION @ISA);
$VERSION = "6.04";
require Net::HTTP;
@ISA=qw(Net::HTTP);
sub can_read {
return 1;
}
sub sysread {
my $self = $_[0];
if (${*$self}{'httpnb_read_count'}++) {
${*$self}{'http_buf'} = ${*$self}{'httpnb_save'};
die "Multi-read\n";
}
my $buf;
my $offset = $_[3] || 0;
my $n = sysread($self, $_[1], $_[2], $offset);
${*$self}{'httpnb_save'} .= substr($_[1], $offset);
return $n;
}
sub read_response_headers {
my $self = shift;
${*$self}{'httpnb_read_count'} = 0;
${*$self}{'httpnb_save'} = ${*$self}{'http_buf'};
my @h = eval { $self->SUPER::read_response_headers(@_) };
if ($@) {
return if $@ eq "Multi-read\n";
die;
}
return @h;
}
sub read_entity_body {
my $self = shift;
${*$self}{'httpnb_read_count'} = 0;
${*$self}{'httpnb_save'} = ${*$self}{'http_buf'};
# XXX I'm not so sure this does the correct thing in case of
# transfer-encoding tranforms
my $n = eval { $self->SUPER::read_entity_body(@_); };
if ($@) {
$_[0] = "";
return -1;
}
return $n;
}
1;
__END__
=head1 NAME
Net::HTTP::NB - Non-blocking HTTP client
=head1 SYNOPSIS
use Net::HTTP::NB;
my $s = Net::HTTP::NB->new(Host => "www.perl.com") || die $@;
$s->write_request(GET => "/");
use IO::Select;
my $sel = IO::Select->new($s);
READ_HEADER: {
die "Header timeout" unless $sel->can_read(10);
my($code, $mess, %h) = $s->read_response_headers;
redo READ_HEADER unless $code;
}
while (1) {
die "Body timeout" unless $sel->can_read(10);
my $buf;
my $n = $s->read_entity_body($buf, 1024);
last unless $n;
print $buf;
}
=head1 DESCRIPTION
Same interface as C<Net::HTTP> but it will never try multiple reads
when the read_response_headers() or read_entity_body() methods are
invoked. This make it possible to multiplex multiple Net::HTTP::NB
using select without risk blocking.
If read_response_headers() did not see enough data to complete the
headers an empty list is returned.
If read_entity_body() did not see new entity data in its read
the value -1 is returned.
=head1 SEE ALSO
L<Net::HTTP>
=head1 COPYRIGHT
Copyright 2001 Gisle Aas.
This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
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