import Foundation
let pattern = ##"""
# allow multiple groups with the same name
(?J)
# protocol user host-ip port path path path querystring fragment
^
#protocol
(?:(?<scheme>[a-zA-Z][a-zA-Z\d+-.]*):)?
(?|
#slash-slash
\/\/
#userinfo
(?:
#user
(?<user>[a-zA-Z\d\-._~\!$&'()*+,;=%]*)
#password
(?::(?<pass>[a-zA-Z\d\-._~\!$&'()*+,;=:%]*))?
@)?
#host-ip
(?<host>(?:[a-zA-Z\d-.%]+)|(?:\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})|(?:\[(?:[a-fA-F\d.:]+)\]))?
#port
(?::(?<port>\d*))?
#slash-path
(?<path>
(?:\/ [a-zA-Z\d\-._~\!$&'()*+,;=:@%]* )*
)
#slash-path
|(?<user>)(?<pass>)(?<host>)(?<port>)
(?<path>\/ [a-zA-Z\d\-._~\!$&'()*+,;=:@%]+(?:\/[a-zA-Z\d\-._~\!$&'()*+,;=:@%]*)*)?
#path
|(?<user>)(?<pass>)(?<host>)(?<port>)
(?<path> [a-zA-Z\d\-._~\!$&'()*+,;=:@%]+(?:\/[a-zA-Z\d\-._~\!$&'()*+,;=:@%]*)*)
)?
#querystring
(?:\?(?<query>[a-zA-Z\d\-._~\!$&'()*+,;=:@%\/?]*))?
#fragment
(?:\#(?<fragment>[a-zA-Z\d\-._~\!$&'()*+,;=:@%\/?]*))?
$
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = ##"""
https://regex101.com/
https://regex101.com/thing/blah.foo
https://regex101.com:28801/thing/blah/patterns?where_foo=bar&where_primary_access_node=true
https://regex101.com:8443/thing/index.html#/landing
"""##
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