use strict;
my $str = '10.100.7.118 - - [02/Aug/2022:19:27:57 +0800] "GET /api/article/list/news HTTP/1.1" 200 103594 "https://165.npa.gov.tw/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36" "172.27.31.231" 0.062 0.062 .
49.216.25.168, 203.66.34.45 - - [02/Aug/2022:19:28:10 +0800] "GET /assets/i18n/zh-tw.json HTTP/1.1" 200 9760 "https://165.npa.gov.tw/" "Mozilla/5.0 (iPhone; CPU iPhone OS 15_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148" "172.27.31.231" 0.031 0.031 .
';
my $regex = qr/(?:-|(?P<real_ip>[\-\da-f.:, ]+)) - (?<remote_user>\S+) \[(?<timestamp>[^\]]+)\]\s+"(?:\-|(?<request>\w+) (?<request_uri>[^ \?]+)(?:\?(?<request_uri_query>[^ ]*))? (?<request_version>[\w\/\.]+))"\s+(?P<status>[1-9]\d{2})\s+(?P<body_bytes_sent>\d+)\s+"(?<http_referer>[^"]+)"\s+"(?<http_user_agent>[^"]+)"\s+"(?P<remote_ip>[\da-f.:]+)" (?:\-|(?P<upstream_response_time>\d+(?:.\d+)?))\s+(?P<request_time>\d+(?:.\d+)?) (?P<pipe>[\.p])/mp;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html