const regex = /signatures\s\((?<signature_value>[^\)]+)\)/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('signatures\\s\\((?<signature_value>[^\\)]+)\\)', 'g')
const str = `Sep 19 23:32:49 10.201.1.79 [pfsp] emerg: Host Detection alert #13630, start 2017-09-19 23:31:45 UTC, duration 64, direction incoming, host 1.2.3.4, signatures (IP Fragmentation, DNS Amplification), impact 1.10 Gbps/117.80 Kpps, importance 2, managed_objects ("ARIN-Allocated Prefixes"), (parent managed object "nil")
Sep 20 04:56:50 10.201.1.79 [pfsp] emerg: Host Detection alert #13631, start 2017-09-20 04:56:45 UTC, duration 5, direction incoming, host 1.2.3.4, signatures (IP Fragmentation), impact 133.45 Mbps/21.82 Kpps, importance 1, managed_objects ("ARIN-Allocated Prefixes"), (parent managed object "nil") `;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions