import Foundation
let pattern = #"^(?<timestamp>[^ ]*)\.(?<time_microseconds>\d*)\+[^ ]+ (?<host>[^ ]*) postgres\[(?<pid>\d*)\]: \[(?<groupid>[^ ]\d*)-(?<lineid>[^ ]\d*)\](?<message>.*)$"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
2017-03-21T03:01:32.627434+00:00 ec317 postgres[82271]: [134-1] 2017-03-21 03:01:32 UTC [82271]: [2-1] user=unknown db=[unknown] LOG: incomplete startup packet
2017-03-21T03:01:32.761669+00:00 ec317 postgres[82270]: [135-1] 2017-03-21 03:01:32 UTC [82270]: [3-1] user=gz_kettle,db=greenzone LOG: disconnection: session time: 0:00:00.182 user=gz_kettle database=greenzone host=172.26.27.22 port=35849
2017-03-21T03:01:32.800403+00:00 ec317 postgres[82272]: [133-1] 2017-03-21 03:01:32 UTC [82272]: [1-1] user=[unknown],db=[unknown] LOG: connection received: host=172.26.27.22 port=35850
2017-03-21T03:01:32.801596+00:00 ec317 postgres[82272]: [134-1] 2017-03-21 03:01:32 UTC [82272]: [2-1] user=gz_kettle,db=greenzone LOG: connection authorized: user=gz_kettle database=greenzone
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(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 Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression