scripts/download.pl

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (C) 2006 OpenWrt.org
   4 #
   5 # This is free software, licensed under the GNU General Public License v2.
   6 # See /LICENSE for more information.
   7 #
   8
   9 use strict;
  10 use warnings;
  11
  12 my $target = shift @ARGV;
  13 my $filename = shift @ARGV;
  14 my $md5sum = shift @ARGV;
  15 my @mirrors;
  16
  17 my $ok;
  18
  19 @ARGV > 0 or die "Syntax: $0 <target dir> <filename> <md5sum> <mirror> [<mirror> ...]\n";
  20
  21 sub which($) {
  22         my $prog = shift;
  23         my $res = `which $prog`;
  24         $res or return undef;
  25         $res =~ /^no / and return undef;
  26         $res =~ /not found/ and return undef;
  27         return $res;
  28 }
  29
  30 my $md5cmd = which("md5sum");
  31 $md5cmd or $md5cmd = which("md5");
  32 $md5cmd or die 'no md5 checksum program found, please install md5 or md5sum';
  33 chomp $md5cmd;
  34
  35 sub download
  36 {
  37         my $mirror = shift;
  38         my $options = $ENV{WGET_OPTIONS};
  39         $options or $options = "";
  40
  41         $mirror =~ s/\/$//;
  42         open WGET, "wget -t1 --timeout=20 $options -O- \"$mirror/$filename\" |" or die "Cannot launch wget.\n";
  43         open MD5SUM, "| $md5cmd > \"$target/$filename.md5sum\"" or die "Cannot launch md5sum.\n";
  44         open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
  45         my $buffer;
  46         while (read WGET, $buffer, 1048576) {
  47                 print MD5SUM $buffer;
  48                 print OUTPUT $buffer;
  49         }
  50         close MD5SUM;
  51         close WGET;
  52         close OUTPUT;
  53
  54         if (($? >> 8) != 0 ) {
  55                 print STDERR "Download failed.\n";
  56                 cleanup();
  57                 return;
  58         }
  59
  60         my $sum = `cat "$target/$filename.md5sum"`;
  61         $sum =~ /^(\w+)\s*/ or die "Could not generate md5sum\n";
  62         $sum = $1;
  63
  64         if (($md5sum =~ /\w{32}/) and ($sum ne $md5sum)) {
  65                 print STDERR "MD5 sum of the downloaded file does not match - deleting download.\n";
  66                 cleanup();
  67                 return;
  68         }
  69
  70         unlink "$target/$filename";
  71         system("mv \"$target/$filename.dl\" \"$target/$filename\"");
  72         cleanup();
  73 }
  74
  75 sub cleanup
  76 {
  77         unlink "$target/$filename.dl";
  78         unlink "$target/$filename.md5sum";
  79 }
  80
  81 foreach my $mirror (@ARGV) {
  82         if ($mirror =~ /^\@SF\/(.+)$/) {
  83                 # give sourceforge a few more tries, because it redirects to different mirrors
  84                 for (1 .. 5) {
  85                         push @mirrors, "http://downloads.sourceforge.net/$1";
  86                 }
  87         } elsif ($mirror =~ /^\@GNU\/(.+)$/) {
  88                 my $gnupath = $1;
  89                 push @mirrors, "ftp://ftp.gnu.org/gnu/$gnupath";
  90                 push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$gnupath";
  91                 push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$gnupath";
  92                 push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$gnupath";
  93                 push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$gnupath";
  94                 push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$gnupath";
  95                 push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$gnupath";
  96                 push @mirrors, "ftp://ftp.digex.net/pub/gnu/$gnupath";
  97         } else {
  98                 push @mirrors, $mirror;
  99         }
 100 }
 101
 102 #push @mirrors, 'http://mirror1.openwrt.org';
 103 push @mirrors, 'http://mirror2.openwrt.org/sources';
 104 push @mirrors, 'http://downloads.openwrt.org/sources';
 105
 106 while (!$ok) {
 107         my $mirror = shift @mirrors;
 108         $mirror or die "No more mirrors to try - giving up.\n";
 109
 110         download($mirror);
 111         -f "$target/$filename" and $ok = 1;
 112 }
 113
 114 $SIG{INT} = \&cleanup;
 115