我正在尝试搜索Load Balancer配置并提取一些数据。配置文件如下所示
pool {
name "POOL_name1"
ttl 30
monitor all "tcp"
preferred rr
partition "Common"
member 12.24.5.100:80
}
pool {
name "Pool-name2"
ttl 30
monitor all "https_ignore_dwn"
preferred rr
fallback rr
partition "Common"
member 69.241.25.121:8443
member 69.241.25.122:8443
}
我正在尝试将每个池配置分配给它自己的阵列,因此我可以遍历该阵列以查找特定的IP地址和池名称。我尝试了以下正则表达式,但它不起作用。
my @POOLDATA = <FILE>;
close FILE;
foreach (@POOLDATA) {
if (/^pool\s\{\s/ .. /^\}\s/) {
push (@POOLCONFIG, "$_");
}
}
有没有人建议如何将每个池配置分成自己的数组? (或更好的建议)提前感谢您的帮助
答案 0 :(得分:2)
#!/usr/bin/env perl
use warnings; use strict;
my @pools;
my $keys = join('|', sort
'name',
'ttl',
'monitor all',
'preferred',
'partition',
'member'
);
my $pat = qr/^($keys)\s+([^\n]+)\n\z/;
while ( my $line = <DATA> ) {
if ($line =~ /^pool\s+{/ ) {
push @pools, {},
}
elsif (my ($key, $value) = ($line =~ $pat)) {
$value =~ s/^"([^"]+)"\z/$1/;
push @{ $pools[-1]->{$key} }, $value;
}
}
use Data::Dumper;
print Dumper \@pools;
__DATA__
pool {
name "POOL_name1"
ttl 30
monitor all "tcp"
preferred rr
partition "Common"
member 12.24.5.100:80
}
pool {
name "Pool-name2"
ttl 30
monitor all "https_ignore_dwn"
preferred rr
fallback rr
partition "Common"
member 69.241.25.121:8443
member 69.241.25.122:8443
}
输出:
$VAR1 = [ { 'monitor all' => [ 'tcp' ], 'member' => [ '12.24.5.100:80' ], 'ttl' => [ '30' ], 'name' => [ 'POOL_name1' ], 'preferred' => [ 'rr' ], 'partition' => [ 'Common' ] }, { 'monitor all' => [ 'https_ignore_dwn' ], 'member' => [ '69.241.25.121:8443', '69.241.25.122:8443' ], 'ttl' => [ '30' ], 'name' => [ 'Pool-name2' ], 'preferred' => [ 'rr' ], 'partition' => [ 'Common' ] } ];
当然,您可以检查成员元素,如果找不到,则填写默认元素。事实上,有了基本结构,你应该能够自己做到这一点。
一种方法是检查池记录的结尾:
while ( my $line = <DATA> ) {
if ($line =~ /^pool\s+{/ ) {
push @pools, {},
}
elsif (my ($key, $value) = ($line =~ $pat)) {
$value =~ s/^"([^"]+)"\z/$1/;
push @{ $pools[-1]->{$key} }, $value;
}
elsif ($line =~ /^\s*}/) {
my $last = $pools[-1];
if ($last and not $last->{member}) {
$last->{member} = [ qw(0.0.0.0) ];
}
}
}
答案 1 :(得分:1)
建议使用Sinan Unur,您可以在数组中存储对哈希的引用。这样,数组的每个元素都是一个哈希值。
顺便说一句,Sinan的数据结构有点复杂:你有一个池阵列。每个池都是一个哈希,其密钥是池元素名称的值,而引用是一个数组。这样,池中的每个元素都可以有多个值(就像您的IP地址一样)。
我唯一的评论是我可能会使用哈希来存储池,并通过IP地址键入它。也就是说,假设IP地址对于特定池是唯一的。这样,您可以轻松地通过IP地址提取池,而无需搜索。出于同样的原因,我还会按池名保持并行结构。 (并且,由于每个池都是一个引用,因此通过IP地址和名称存储池不会占用额外的内存。而且,更新一个池会自动更新另一个池。
如果您不熟悉Perl引用,或者如何创建数组或哈希,或者数组哈希,您可以查看以下Perl教程:
使用多层Perl结构后,您可以快速了解如何在Perl脚本中使用面向对象的设计,并使维护这些结构变得非常容易。
答案 2 :(得分:1)
另一种看待它的方式。这个特别处理多个成员字段。
use strict;
use warnings;
use Data::Dumper;
use English qw<$RS>;
use List::MoreUtils qw<natatime>;
use Params::Util qw<_ARRAY _CODE>;
# Here, we rig the record separator to break on \n}\n
local $RS = "\n}\n";
# Here, we standardize a behavior with hash duplicate keys
my $TURN_DUPS_INTO_ARRAYS = sub {
my ( $hr, $k, $ov, $nv ) = @_;
if ( _ARRAY( $ov )) {
push @{ $ov }, $nv;
}
else {
$h->{ $k } = [ $ov, $nv ];
}
};
# Here is a generic hashing routine
# Most of the work is figuring out how the user wants to store values
# and deal with duplicates
sub hash {
my ( $code, $param_name, $store_op, $on_duplicate );
while ( my ( $peek ) = @_ ) {
if ( $code = _CODE( $peek )) {
last unless $param_name;
if ( $param_name eq 'on_dup' ) {
$on_duplicate = shift;
}
elsif ( $param_name eq 'store' ) {
$store_op = shift;
}
else {
last;
}
undef $code;
}
else {
my @c = $peek =~ /^-?(on_dup|store$)/;
last unless $param_name = $c[0];
shift;
}
}
$store_op ||= sub { $_[0]->{ $_[1] } = $_[3]; };
$on_duplicate ||= $code || $store_op;
my %h;
while ( @_ ) {
my $k = shift;
next unless defined( my $v = shift );
(( exists $h{ $k } and $on_duplicate ) ? $on_duplicate
: $store_op
)->( \%h, $k, $h{ $k }, $v )
;
}
return wantarray ? %h : \%h;
}
my %pools;
# So the loop is rather small
while ( <DATA> ) {
# remove pool { ... } brackets
s/\A\s*pool\s+\{\s*\n//smx;
s/\n\s*\}\n*//smx;
my $h
= hash( -on_duplicate => $TURN_DUPS_INTO_ARRAYS
, map { s/"$//; s/\s+$//; $_ }
map { split /\s+"|\s{2,}/msx, $_, 2 }
split /\n/m
);
$pools{ $h->{name} } = $h;
}
print Dumper( \%pools );
### %pools
__DATA__
pool {
name "POOL_name1"
ttl 30
monitor all "tcp"
preferred rr
partition "Common"
member 12.24.5.100:80
}
pool {
name "Pool-name2"
ttl 30
monitor all "https_ignore_dwn"
preferred rr
fallback rr
partition "Common"
member 69.241.25.121:8443
member 69.241.25.122:8443
}
关于hash
函数的一个注释,我注意到最近有大量关于哈希处理重复的帖子。这是一般解决方案。