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#!/usr/bin/perl
use strict;
use warnings;
my $target = shift @ARGV;
my $filename = shift @ARGV;
my $md5sum = shift @ARGV;
my @mirrors = @ARGV;
my $ok;
@mirrors > 0 or die "Syntax: $0 <target dir> <filename> <md5sum> <mirror> [<mirror> ...]\n";
push @mirrors, 'http://openwrt.inf.fh-brs.de/mirror';
sub download
{
my $mirror = shift;
open WGET, "wget -t1 --timeout=20 -O- \"$mirror/$filename\" |" or die "Cannot launch wget.\n";
open MD5SUM, "| md5sum > \"$target/$filename.md5sum\"" or die "Cannot launch md5sum.\n";
open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
my $buffer;
while (read WGET, $buffer, 1048576) {
print MD5SUM $buffer;
print OUTPUT $buffer;
}
close MD5SUM;
close WGET;
close OUTPUT;
if (($? >> 8) != 0 ) {
print STDERR "Download failed.\n";
cleanup();
return;
}
my $sum = `cat "$target/$filename.md5sum"`;
$sum =~ /^(\w+)\s+/ or die "Could not generate md5sum\n";
$sum = $1;
if (($md5sum =~ /\w{32}/) and ($sum ne $md5sum)) {
print STDERR "MD5 sum of the downloaded file does not match - deleting download.\n";
cleanup();
return;
}
unlink "$target/$filename";
system("mv \"$target/$filename.dl\" \"$target/$filename\"");
cleanup();
}
sub cleanup
{
unlink "$target/$filename.dl";
unlink "$target/$filename.md5sum";
}
while (!$ok) {
my $mirror = shift @mirrors;
$mirror or die "No more mirrors to try - giving up.\n";
if ($mirror =~ /^\@SF\/(.+)$/) {
my $sfpath = $1;
open SF, "wget -t1 -q -O- 'http://prdownloads.sf.net/$sfpath/$filename' |";
while (<SF>) {
/RADIO NAME=use_default VALUE=(\w+) OnClick="form\.submit\(\)">/ and do {
push @mirrors, "http://$1.dl.sourceforge.net/sourceforge/$sfpath";
};
}
close SF;
} else {
download($mirror);
}
-f "$target/$filename" and $ok = 1;
}
$SIG{INT} = \&cleanup;
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