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A Perl script to mirror SD card images of Raspberry Pi
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#!/usr/bin/env perl | |
# A script to mirror SD card images of Raspberry Pi | |
# Licensed under the MIT license: http://fujieda.mit-license.org/2013 | |
use strict; | |
use HTTP::Tiny; | |
use HTTP::Date; | |
use File::Path qw(mkpath); | |
my $rpi = "raspberrypi"; | |
my $downloads = "http://www.raspberrypi.org/downloads"; | |
my $src = "http://downloads.raspberrypi.org/images/"; | |
my $dst = "/ftp/pub/$rpi/"; | |
my $http = HTTP::Tiny->new(); | |
mkdir("log") unless -d "log"; | |
open(my $log, '>>', "log/$rpi.log") or die "can't open log/$rpi.log: $!\n"; | |
select($log); | |
print "-- start: ". localtime() ."\n"; | |
if (mirror($src, $dst)) { | |
open(my $timestamp, '>', "log/$rpi.timestamp") or die "can't open log/$rpi.timestamp: $!\n"; | |
close($timestamp); | |
} | |
print "-- end: ". localtime() ."\n"; | |
close($log); | |
sub mirror | |
{ | |
my ($src, $dst) = @_; | |
my $response = $http->get($downloads); | |
unless ($response->{success}) { | |
print "$src: $response->{status} $response->{reason}\n"; | |
return undef; | |
} | |
for (split("\n", $response->{content})) { | |
next unless m{<a href="$src((.+/)[^/]+)"}; | |
my ($file, $dir) = ($1, $2); | |
mkpath("$dst$dir"); | |
return undef unless fetch("$src$file", "$dst$file"); | |
} | |
return 1; | |
} | |
sub fetch | |
{ | |
my ($src, $dst) = @_; | |
my %opt; | |
if (-f $dst) { | |
my $mtime = (stat(_))[9]; | |
$opt{headers}{"If-Modified-Since"} = time2str($mtime); | |
} | |
my $response; | |
while (1) { | |
$response = $http->get($src, \%opt); | |
return 1 if $response->{status} == 304; | |
unless ($response->{success}) { | |
print "$src: $response->{status} $response->{reason}\n"; | |
return undef; | |
} | |
if ($response->{content} =~ m{(http://files\.velocix\.com/[^"]+)}) { | |
$src = $1; | |
next; | |
} | |
last; | |
} | |
my $mtime = str2time($response->{headers}{"last-modified"}); | |
my $fh; | |
unless (open($fh, '>', $dst)) { | |
print("can't open $dst: $!\n"); | |
return undef; | |
} | |
print $fh $response->{content}; | |
close($fh); | |
utime(undef, $mtime, $dst); | |
print("$dst: transferred.\n"); | |
return 1; | |
} |
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