package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^.+Severity: 20.*\R^.*\R(?![\s\S]*Severity: 20)`)
var str = `2020-01-27 11:12:00.72 Backup Log was backed up. Database: ReportServerTempDB, creation date(time): 2019/05/22(12:31:06), first LSN: 79:1911:1, last LSN: 79:1933:1, number of dump devices: 1, device information: (FILE=1, TYPE=DISK: {'E:\SQLLogDumps\ReportServerTempDB_tlog_20200127111200.trn'}). This is an informational message only. No user action is required.
2020-01-27 11:21:47.95 Logon Error: 17806, Severity: 20, State: 14.
2020-01-27 11:21:47.95 Logon Occurrence number one
2020-01-27 11:21:47.95 Logon Error: 18452, Severity: 14, State: 1.
2020-01-27 11:21:47.95 Logon Login failed. The login is from an untrusted domain and cannot be used with Integrated authentication. [CLIENT: 192.168.4.208]
2020-01-27 11:21:47.95 Logon Error: 17806, Severity: 20, State: 14.
2020-01-27 11:21:47.95 Logon Occurrence number two
2020-01-27 11:21:47.95 Logon Error: 18452, Severity: 14, State: 1.
2020-01-27 11:21:47.95 Logon Login failed. The login is from an untrusted domain and cannot be used with Integrated authentication. [CLIENT: 192.168.4.208]`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
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 Golang, please visit: https://golang.org/pkg/regexp/