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: $0 <target dir> <filename> <md5sum> <mirror> [<mirror> ...]\n";
  22
  23 sub localmirrors {
  24     my @mlist;
  25     open LM, "$scriptdir/localmirrors" and do {
  26             while (<LM>) {
  27                         chomp $_;
  28                         push @mlist, $_;
  29                 }
  30                 close LM;
  31         };
  32         open CONFIG, "<".$ENV{'TOPDIR'}."/.config" and do {
  33                 while (<CONFIG>) {
  34                         /^CONFIG_LOCALMIRROR="(.+)"/ and do {
  35                                 chomp;
  36                                 push @mlist, $1;
  37                         };
  38                 }
  39                 close CONFIG;
  40         };
  41
  42
  43     return @mlist;
  44 }
  45
  46 sub which($) {
  47         my $prog = shift;
  48         my $res = `which $prog`;
  49         $res or return undef;
  50         $res =~ /^no / and return undef;
  51         $res =~ /not found/ and return undef;
  52         return $res;
  53 }
  54
  55 my $md5cmd = which("md5sum");
  56 $md5cmd or $md5cmd = which("md5");
  57 $md5cmd or die 'no md5 checksum program found, please install md5 or md5sum';
  58 chomp $md5cmd;
  59
  60 sub download
  61 {
  62         my $mirror = shift;
  63         my $options = $ENV{WGET_OPTIONS};
  64         $options or $options = "";
  65
  66         $mirror =~ s/\/$//;
  67         open WGET, "wget -t1 --timeout=20 $options -O- \"$mirror/$filename\" |" or die "Cannot launch wget.\n";
  68         open MD5SUM, "| $md5cmd > \"$target/$filename.md5sum\"" or die "Cannot launch md5sum.\n";
  69         open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
  70         my $buffer;
  71         while (read WGET, $buffer, 1048576) {
  72                 print MD5SUM $buffer;
  73                 print OUTPUT $buffer;
  74         }
  75         close MD5SUM;
  76         close WGET;
  77         close OUTPUT;
  78
  79         if (($? >> 8) != 0 ) {
  80                 print STDERR "Download failed.\n";
  81                 cleanup();
  82                 return;
  83         }
  84
  85         my $sum = `cat "$target/$filename.md5sum"`;
  86         $sum =~ /^(\w+)\s*/ or die "Could not generate md5sum\n";
  87         $sum = $1;
  88
  89         if (($md5sum =~ /\w{32}/) and ($sum ne $md5sum)) {
  90                 print STDERR "MD5 sum of the downloaded file does not match - deleting download.\n";
  91                 cleanup();
  92                 return;
  93         }
  94
  95         unlink "$target/$filename";
  96         system("mv \"$target/$filename.dl\" \"$target/$filename\"");
  97         cleanup();
  98 }
  99
 100 sub cleanup
 101 {
 102         unlink "$target/$filename.dl";
 103         unlink "$target/$filename.md5sum";
 104 }
 105
 106 @mirrors = localmirrors();
 107
 108 foreach my $mirror (@ARGV) {
 109         if ($mirror =~ /^\@SF\/(.+)$/) {
 110                 # give sourceforge a few more tries, because it redirects to different mirrors
 111                 for (1 .. 5) {
 112                         push @mirrors, "http://downloads.sourceforge.net/$1";
 113                 }
 114         } elsif ($mirror =~ /^\@GNU\/(.+)$/) {
 115                 my $gnupath = $1;
 116                 push @mirrors, "ftp://ftp.gnu.org/gnu/$gnupath";
 117                 push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$gnupath";
 118                 push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$gnupath";
 119                 push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$gnupath";
 120                 push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$gnupath";
 121                 push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$gnupath";
 122                 push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$gnupath";
 123                 push @mirrors, "ftp://ftp.digex.net/pub/gnu/$gnupath";
 124         } else {
 125                 push @mirrors, $mirror;
 126         }
 127 }
 128
 129 #push @mirrors, 'http://mirror1.openwrt.org';
 130 push @mirrors, 'http://mirror2.openwrt.org/sources';
 131 push @mirrors, 'http://downloads.openwrt.org/sources';
 132
 133 while (!$ok) {
 134         my $mirror = shift @mirrors;
 135         $mirror or die "No more mirrors to try - giving up.\n";
 136
 137         download($mirror);
 138         -f "$target/$filename" and $ok = 1;
 139 }
 140
 141 $SIG{INT} = \&cleanup;
 142