source: freewrt/scripts/download.pl@ f01b717

#!/usr/bin/perl
use strict;
use warnings;

my $target = shift @ARGV;
my $filename = shift @ARGV;
my $md5sum = shift @ARGV;
my @mirrors;

my $ok;

@ARGV > 0 or die "Syntax: $0 <target dir> <filename> <md5sum> <mirror> [<mirror> ...]\n";

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 ($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";
}

foreach my $mirror (@ARGV) {
        if ($mirror =~ /^\@SF\/(.+)$/) {
                my $sfpath = $1;
                open SF, "wget -t1 -q -O- 'https://prdownloads.sourceforge.net/$sfpath/$filename' |";
                while (<SF>) {
                        /RADIO NAME=use_default VALUE=(\w+) OnClick="form\.submit\(\)">/ or
                        /type="radio" name="use_default" value="(\w+)" onclick="form\.submit\(\)"\/>/ and do {
                                push @mirrors, "https://$1.dl.sourceforge.net/sourceforge/$sfpath";
                        };
                        /<a href="\/.+\?use_mirror=(\w+)"><b>Download/ and do {
                                push @mirrors, "https://$1.dl.sourceforge.net/sourceforge/$sfpath";
                        };
                }
                push @mirrors, "https://dl.sourceforge.net/sourceforge/$sfpath";
                close SF;
        } elsif ($mirror =~ /^\@GNU\/(.+)$/) {
                my $gnupath = $1;
                push @mirrors, "ftp://ftp.gnu.org/gnu/$gnupath";
                push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$gnupath";
                push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$gnupath";
                push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$gnupath";
                push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$gnupath";
                push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$gnupath";
                push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$gnupath";
                push @mirrors, "ftp://ftp.digex.net/pub/gnu/$gnupath";
        } else {
                push @mirrors, $mirror;
        }
}

push @mirrors, 'https://mirror2.openwrt.org/sources/';

while (!$ok) {
        my $mirror = shift @mirrors;
        $mirror or die "No more mirrors to try - giving up.\n";
        
        download($mirror);
        -f "$target/$filename" and $ok = 1;
}

$SIG{INT} = \&cleanup;