const regex = /(\d+:\d{4}) (\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}) ([A-Za-z\n]+) (.*?)(?=\n\d+:|$)/gs;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(\\d+:\\d{4}) (\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}\\.\\d{3}) ([A-Za-z\\n]+) (.*?)(?=\\n\\d+:|$)', 'gs')
const str = `5376:0084 2015-08-07 13:51:29.103 Error ### Error Message ###
5376:0084 2015-08-07 13:51:35.545 Error Discarding invalid session
System.Web.Services.Protocols.SoapException: Verify Session ID failed
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
5376:0084 2015-08-07 13:51:36.013 Error ### Error Message ###`;
// 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