Perl简单用法：命令行参数、连接数据库mysql、DNS查询、发送邮件

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一、命令行参数

1.1 代码

#!/usr/bin/env perluse Getopt::Long;use Data::Dumper;use Pod::Usage;my $Debug = 1;sub dprint (@){        return unless $Debug;        chomp(my @m = @_);        print STDERR 'DEBUG: ', join(" ", @m),"\n";}MAIN:{        my $db_user;        my $db_pass;        GetOptions(                \my %opt,                'debug|d+'      => \$Debug,                'help|h|?'      => sub{ pod2usage(-verbose=>1) },                'db_user|u=s'   => \$db_user,                'db_pass|x=s'   => \$db_pass,                ) or pod2usage();        pod2usage(-message=>"must requires db_user, db_pass!")                unless $db_user && $db_pass;        dprint "db_user         : $db_user";        dprint "db_pass         : $db_pass";}

1.2 使用

命令：“--” 或 “-”

./test.pl --db_user testuser --db_pass testpass
./test.pl --u testuser --x testpass

二、连接数据库mysql

2.1 代码

#!/usr/bin/env perluse DBI;MAIN:{        my $dbh = DBI->connect("DBI:mysql:clouxns:202.85.222.121:3306", "root", "zxc1758!&%*");        $query_sql = "SELECT zone_id, zone_name FROM xns_zone";        $query_sth = $dbh->prepare($query_sql);        $query_sth->execute() or die "can't run query sql:$dbh->errstr";        while(my @data = $query_sth->fetchrow_array())        {                my $zone_id      = $data[0];                my $zone_name    = $data[1];                print "$zone_id\t$zone_name\n";        }        $dbh->disconnect();}

三、DNS查询

dns查询A记录、NS、SOA。

#!/usr/bin/env perluse Net::DNS::Resolver;use Net::DNS::Packet;MAIN:{        my $resolver = Net::DNS::Resolver->new;#Find a host's address        my $query = $resolver->search("www.guowenyan.cn");        if($query)        {                foreach my $rr ( grep { $_->type eq "A" } $query->answer )                {                        print $rr->address,"\n";                }        }        else        {                warn "query failed:",$resolver->errorstring,"\n";        }#Find the nameservers for a domain.        my $query = $resolver->search("baidu.com", "NS");        if($query)        {                foreach my $rr ( grep { $_->type eq "NS" } $query->answer )                {                        print $rr->nsdname,"\n";                }        }        else        {                warn "query failed:",$resolver->errorstring,"\n";        }#Find a domain's SOA record in zone file format.        my $query = $resolver->search("baidu.com", "SOA");        if($query)        {                ($query->answer)[0]->print;        }        else        {                warn "query failed:",$resolver->errorstring,"\n";        }}

四、发送邮件

4.1 代码

#!/usr/bin/env perluse Net::SMTP;sub send_mail(){        my @mail_to = ('480160531@qq.com', '2135361204@qq.com');        my $mail_from = 'kan_haha001@163.com';        my $mail_pass = "123zxc";        my $mail_message = "aanbb";        my $smtp = Net::SMTP->new("smtp.163.com");        $smtp->auth($mail_from, $mail_pass) || die "Auth Error! $!";        foreach my $mail_to (@mail_to)        {                $smtp->mail($mail_from);                $smtp->to($mail_to);                #Start the mail                $smtp->data();                #Send the header                $smtp->datasend("From: $mail_from\n");                $smtp->datasend("To: $mail_to\n");                $smtp->datasend("Subject: the mail is sended by perl.\n");                $smtp->datasend("\n");                #send the message                $smtp->datasend("$mail_message\n");                #send the termination string                $smtp->dataend();        }        $smtp->quit();}

4.2 注意事项

1. 需要安装Authen::SASL：perl -MCPAN -e shell cpan>install Authen::SASL。

2. 发件人、收件人必须是单引号('kan_haha001.163.com')。

3. 邮件头中的发件人、收件人、主题、正文的前后都必须有\n。（否则会系统退信）

参考资料：

perl发邮件：http://blog.sina.com.cn/s/blog_53eb83640100n1mo.html

perl发送邮件：http://www.cnblogs.com/aLittleBitCool/archive/2012/08/01/2619018.html

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