const regex = new RegExp('(?P<date>\\S{3}\\s\\d{1,3}\\s\\d{2}\\:\\d{2}\\:\\d{2})\\s(?P<device>\\S+)\\s\\S\\=(?P<src>\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})\\:\\s\\S\\=\\"(?P<user>.*?)\\"\\s\\S\\=\\d+\\s\\S\\=\\S\\s\\S\\=\\d+\\s\\S\\=\\d+\\s\\S+\\=\\d\\s\\S{1,3}\\=.*?type=\\".*?\\"\\s.*?meth=(?P<type>\\S+)\\s\\S+\\=\\"(?P<url>.*?)\\"\\s\\S{2}\\=\\"(?P<agent>.*?)\\"\\s\\S{1,3}\\=\\"(?P<url2>.*?)dom\\=\\"(?P<domain>.*?)\\".*?target_ip\\=\\"(?P<dest>\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})\\".*', '')
const str = `Oct 18 06:27:03 WS2000.wnins.com h=172.16.20.74: u="WNINS\\\\rehetzel" s=200 X=+ t=1445149621 T=44767 Ts=0 act=1 cat="0x2200000008" app="-" rsn=- threat="-" type="image/jpeg" ctype="image/jpeg" sav-ev=- sav-dv=- uri-dv=- cache=- in=471 out=990 meth=GET ref="http://www.techrepublic.com/blog/the-enterprise-cloud/how-do-i-assign-permissions-to-users-to-see-sql-agent-jobs/" ua="Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.99 Safari/537.36" req="GET http://d.pzkysq.pink/5ET3nslK.jpg?z=715211411411 HTTP/1.1" dom="pzkysq.pink" filetype="-" rule="0" filesize=518 axtime=0.000455 fttime=0.000043 scantime=- src_cat="0x2000000008" labs_cat="0x2000000008" dcat_prox="-" target_ip="204.93.43.48" labs_rule_id="0" reqtime=0.000 adtime=0.000000 ftbypass=- os=Windows authn=17 auth_by=ntlm dnstime=0.000009 quotatime=-`;
const subst = ``;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
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