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 use File::Basename;
  12
  13 my $target = shift @ARGV;
  14 my $filename = shift @ARGV;
  15 my $md5sum = shift @ARGV;
  16 my $scriptdir = dirname($0);
  17 my @mirrors;
  18
  19 my $ok;
  20
  21 @ARGV > 0 or die "Syntax: $0 <target dir> <filename> <md5sum> <mirror> [<mirror> ...]\n";
  22
  23 sub localmirrors {
  24
  25     my @mlist;
  26     open LM, "$scriptdir/localmirrors" or return ();
  27     while (<LM>) {
  28         chomp $_;
  29         push @mlist, $_;
  30     }
  31
  32     return @mlist;
  33 }
  34
  35 sub which($) {
  36         my $prog = shift;
  37         my $res = `which $prog`;
  38         $res or return undef;
  39         $res =~ /^no / and return undef;
  40         $res =~ /not found/ and return undef;
  41         return $res;
  42 }
  43
  44 my $md5cmd = which("md5sum");
  45 $md5cmd or $md5cmd = which("md5");
  46 $md5cmd or die 'no md5 checksum program found, please install md5 or md5sum';
  47 chomp $md5cmd;
  48
  49 sub download
  50 {
  51         my $mirror = shift;
  52         my $options = $ENV{WGET_OPTIONS};
  53         $options or $options = "";
  54
  55         $mirror =~ s/\/$//;
  56         open WGET, "wget -t1 --timeout=20 $options -O- \"$mirror/$filename\" |" or die "Cannot launch wget.\n";
  57         open MD5SUM, "| $md5cmd > \"$target/$filename.md5sum\"" or die "Cannot launch md5sum.\n";
  58         open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
  59         my $buffer;
  60         while (read WGET, $buffer, 1048576) {
  61                 print MD5SUM $buffer;
  62                 print OUTPUT $buffer;
  63         }
  64         close MD5SUM;
  65         close WGET;
  66         close OUTPUT;
  67
  68         if (($? >> 8) != 0 ) {
  69                 print STDERR "Download failed.\n";
  70                 cleanup();
  71                 return;
  72         }
  73
  74         my $sum = `cat "$target/$filename.md5sum"`;
  75         $sum =~ /^(\w+)\s*/ or die "Could not generate md5sum\n";
  76         $sum = $1;
  77
  78         if (($md5sum =~ /\w{32}/) and ($sum ne $md5sum)) {
  79                 print STDERR "MD5 sum of the downloaded file does not match - deleting download.\n";
  80                 cleanup();
  81                 return;
  82         }
  83
  84         unlink "$target/$filename";
  85         system("mv \"$target/$filename.dl\" \"$target/$filename\"");
  86         cleanup();
  87 }
  88
  89 sub cleanup
  90 {
  91         unlink "$target/$filename.dl";
  92         unlink "$target/$filename.md5sum";
  93 }
  94
  95 @mirrors = localmirrors();
  96
  97 foreach my $mirror (@ARGV) {
  98         if ($mirror =~ /^\@SF\/(.+)$/) {
  99                 # give sourceforge a few more tries, because it redirects to different mirrors
 100                 for (1 .. 5) {
 101                         push @mirrors, "http://downloads.sourceforge.net/$1";
 102                 }
 103         } elsif ($mirror =~ /^\@GNU\/(.+)$/) {
 104                 my $gnupath = $1;
 105                 push @mirrors, "ftp://ftp.gnu.org/gnu/$gnupath";
 106                 push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$gnupath";
 107                 push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$gnupath";
 108                 push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$gnupath";
 109                 push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$gnupath";
 110                 push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$gnupath";
 111                 push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$gnupath";
 112                 push @mirrors, "ftp://ftp.digex.net/pub/gnu/$gnupath";
 113         } else {
 114                 push @mirrors, $mirror;
 115         }
 116 }
 117
 118 #push @mirrors, 'http://mirror1.openwrt.org';
 119 push @mirrors, 'http://mirror2.openwrt.org/sources';
 120 push @mirrors, 'http://downloads.openwrt.org/sources';
 121
 122 while (!$ok) {
 123         my $mirror = shift @mirrors;
 124         $mirror or die "No more mirrors to try - giving up.\n";
 125
 126         download($mirror);
 127         -f "$target/$filename" and $ok = 1;
 128 }
 129
 130 $SIG{INT} = \&cleanup;
 131