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LWP
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UserAgent
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mirror.al
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1997-12-13
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46 lines
# NOTE: Derived from :lib:LWP:UserAgent.pm. Changes made here will be lost.
package LWP::UserAgent;
sub mirror
{
my($self, $url, $file) = @_;
LWP::Debug::trace('()');
my $request = new HTTP::Request('GET', $url);
if (-e $file) {
my($mtime) = (stat($file))[9];
if($mtime) {
$request->header('If-Modified-Since' =>
HTTP::Date::time2str($mtime));
}
}
my $tmpfile = "$file-$$";
my $response = $self->request($request, $tmpfile);
if ($response->is_success) {
my $file_length = (stat($tmpfile))[7];
my($content_length) = $response->header('Content-length');
if (defined $content_length and $file_length < $content_length) {
unlink($tmpfile);
die "Transfer truncated: " .
"only $file_length out of $content_length bytes received\n";
} elsif (defined $content_length and $file_length > $content_length) {
unlink($tmpfile);
die "Content-length mismatch: " .
"expected $content_length bytes, got $file_length\n";
} else {
# OK
rename($tmpfile, $file) or
die "Cannot rename '$tmpfile' to '$file': $!\n";
}
} else {
unlink($tmpfile);
}
return $response;
}
1;