const regex = /(?<=^CN=)(.*?)(?=\s?,\s?o)/gmi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<=^CN=)(.*?)(?=\\s?,\\s?o)', 'gmi')
const str = `CN= John Q. Public, O=Agency, C=US
CN= John Q. Public, Jr.,O=Agency, C=US
CN=John Q. Public,O=Agency, C=US
CN=John Q. Pu,blic,O=Agency, C=US
CN=some name,ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
CN=some name, ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
CN=some name-Y- , ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
cn= some name-Y-,ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
cn= some na, o me-Y-,ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
(?<=^CN=) - positive lookahead to find string starts with CN= and discard that match
(.*?) - non greedy seach for any single character
(?=,\\s?ou\\s=|,\\s?o\\s?=)
(?=,\\s?ou\\s=|,\\s?o\\s?=)`;
// 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