307 lines
6.2 KiB
Perl
Executable File
307 lines
6.2 KiB
Perl
Executable File
#!/usr/bin/perl
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# TODO: implement paths fool proof paths (add trailing backslash if it absent on url and path)
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#
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use strict;
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use warnings "all";
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use Fcntl;
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use File::Basename;
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use File::Path qw(make_path);
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use File::Spec;
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use XML::Parser;
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use IO::Zlib;
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use URI::URL;
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use Data::Dumper;
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sub dlfunc(@);
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sub urlencode($);
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sub getmetadata();
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sub help($);
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sub path_normalize_by_string_manipulation($);
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sub getfilenames($);
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help(0) unless (defined $ARGV[0]);
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help(1) unless (defined $ARGV[1]);
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help(0) if ($ARGV[0] eq '--help');
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help(0) if ($ARGV[0] eq '-h');
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my $noclean = 0;
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if (defined($ARGV[0]) and $ARGV[0] eq '--noclean') {
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$noclean = 1;
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}
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my $BASEURL = $ARGV[0];
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my $BASEDIR = $ARGV[1];
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if ($noclean == 1) {
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help(1) unless (defined $ARGV[2]);
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$BASEURL = $ARGV[1];
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$BASEDIR = $ARGV[2];
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}
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my @REPOFILES;
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my @FILES;
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my $primaryxmlgz = getmetadata();
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my $fh = new IO::Zlib;
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my $xmldata = '';
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if ($fh->open($BASEDIR . $primaryxmlgz, "rb")) {
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while (<$fh>) {
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$xmldata .= $_;
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}
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$fh->close;
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} else {
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syswrite STDERR, sprintf("An error has occured while reading %s.", $BASEDIR . 'repodata/primary.xml.gz');
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exit 1;
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}
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my $p1 = new XML::Parser(Style => 'Tree');
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my $ref = $p1->parse($xmldata);
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undef $xmldata;
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my @array = @{ $ref->[1] };
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for (my $i = 0; $i < @array; $i++) {
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if (defined($array[$i]) and ($array[$i] eq 'package')) {
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$i++;
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my @array2 = @{ $array[$i] };
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my $size = -1;
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my $link;
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for (my $j = 0; $j < @array2; $j++) {
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if (defined($array2[$j]) and ($array2[$j] eq 'size')) {
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$j++;
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$size = $array2[$j][0]{'package'};
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}
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if (defined($array2[$j]) and ($array2[$j] eq 'location')) {
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$j++;
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$link = $array2[$j][0]{'href'};
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# syswrite STDOUT, "+ " . $array2[$j][0]{'href'} . "\n";
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}
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}
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dlfunc($link, $size);
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undef $size;
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undef $link;
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@array2 = -1;
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}
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}
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exit 0 if ($noclean == 1);
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my $searchpath = $BASEDIR;
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chop $searchpath;
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getfilenames($searchpath);
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my @filesToDelete;
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foreach my $fileOnDisk (@FILES) {
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my $flag = 0;
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foreach my $fileInXML (@REPOFILES) {
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if ($fileInXML eq $fileOnDisk) {
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$flag = 1;
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last;
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}
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}
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if ($flag == 0) {
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push @filesToDelete, $fileOnDisk;
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}
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}
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foreach my $file (@filesToDelete) {
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unless (-d $file) {
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unlink $file;
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}
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}
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exit 0;
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sub help($) {
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my $rc = shift;
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my $help = <<'HELP';
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Usage: cr.pl [--noclean] source destination
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Where
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--noclean is optional argument, if it specified, no cleanup operation will
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be performed after rpm downloading complete.
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Source must be http(s) url which trimmed at repodata folder. If full url is
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http://mirror.yandex.ru/centos/7.4.1708/os/x86_64/repodata/repomd.xml
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source must be given as:
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http://mirror.yandex.ru/centos/7.4.1708/os/x86_64/
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Destination is the folder where all files and metadata will be downloaded, if
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folder does not exist it will be created. Must contain trailng slash char.
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For example:
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/var/www/htdocs/repo/
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HELP
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syswrite STDOUT, $help;
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exit $rc;
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}
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sub dlfunc(@) {
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my $url = shift; # short (relative) URL without BASE part
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my $size = shift;
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my $wgetpath;
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my $savepath = path_normalize_by_string_manipulation ($BASEDIR . $url);
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if (substr($savepath, 0, length($BASEDIR)) ne $BASEDIR) {
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syswrite STDERR, sprintf("Skipping package %s, because it out of destdir %s, looks like quirky metadata.\n", $savepath, $BASEDIR);
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return;
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}
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push @REPOFILES, $savepath;
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# do not re-download already downloaded rpm packages
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unless ($size == -1) {
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if (-f $savepath) {
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my $filesize = (stat($savepath))[7];
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if ($size == $filesize) {
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return;
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}
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}
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}
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my $basedir; (undef, $basedir) = fileparse($savepath);
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unless (-d $basedir) {
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my $ret = make_path ($basedir);
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if ($ret < 1) {
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syswrite STDERR, sprintf("Unable to create directory %s .\n", $basedir);
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exit 1;
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}
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}
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if (-f "/bin/wget") {
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$wgetpath = '/bin/wget';
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} elsif (-f "/usr/bin/wget") {
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$wgetpath = '/usr/bin/wget';
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} elsif (-f "/usr/local/bin/wget") {
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$wgetpath = '/usr/local/bin/wget';
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} else {
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syswrite STDERR, "Please install wget. (Unable to find it in std locations)\n";
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exit 1;
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}
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$url = $BASEURL . $url;
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$url = urlencode($url);
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system($wgetpath, '--no-check-certificate', '-q', '-T', '20', '-O', $savepath, '-o', '/dev/null', $url);
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undef $savepath;
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undef $url;
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}
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sub urlencode($) {
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my $url = shift;
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my $urlobj = url $url;
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$url = $urlobj->as_string;
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undef $urlobj;
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return $url;
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}
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sub getmetadata() {
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dlfunc('repodata/repomd.xml', -1);
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my $p1 = new XML::Parser(Style => 'Tree');
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my $ref = $p1->parsefile($BASEDIR . 'repodata/repomd.xml');
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#print Dumper $ref->[1][8][12][0]{'href'};
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# must be 'data'-------^
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# must be 'location'------^
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my @array = @{ $ref->[1] };
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my $primaryxmlgz;
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for (my $i = 0; $i < @array; $i++) {
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if (defined($array[$i]) and ($array[$i] eq 'data')){
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$i++;
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my @array2 = @{ $array[$i] };
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for (my $j = 0; $j < @array2; $j++) {
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if (defined($array2[$j]) and ($array2[$j] eq 'location')) {
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$j++;
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dlfunc($array2[$j][0]{'href'}, -1);
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if ($array2[$j][0]{'href'} =~ /primary\.xml\.gz$/) {
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$primaryxmlgz = $array2[$j][0]{'href'};
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}
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}
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}
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@array2 = -1;
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}
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}
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return $primaryxmlgz;
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}
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sub path_normalize_by_string_manipulation ($) {
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my $path = shift;
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# canonpath does string manipulation, but does not remove "..".
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my $ret = File::Spec->canonpath($path);
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# Let's remove ".." by using a regex.
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while ($ret =~ s{
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(^|/) # Either the beginning of the string, or a slash, save as $1
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( # Followed by one of these:
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[^/]| # * Any one character (except slash, obviously)
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[^./][^/]| # * Two characters where
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[^/][^./]| # they are not ".."
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[^/][^/][^/]+ # * Three or more characters
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) # Followed by:
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/\.\./ # "/", followed by "../"
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}{$1}x
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) {
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# Repeat this substitution until not possible anymore.
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}
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# Re-adding the trailing slash, if needed.
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if ($path =~ m!/$! && $ret !~ m!/$!) {
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$ret .= '/';
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}
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return $ret;
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}
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sub getfilenames($) {
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my $path = shift;
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opendir (DIR, $path) or return "";
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my @localfiles;
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@localfiles =
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map { $path . '/' . $_ }
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grep { !/^\.{1,2}$/ }
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readdir (DIR);
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@FILES = (@FILES, @localfiles);
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foreach (@localfiles) {
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next if(-l $_);
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if( -d $_){
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getfilenames($_);
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}
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}
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}
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__END__
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