import Foundation
let pattern = ##"(?<scheme>[^!$&'()*,;=@//:\s]+):(?<authority>//(?<userinfo>(?<username>[\w\.\-!$&'()*,;=]+):?(?<password>[\w\.\-!$&'()*,;=]+)?@)?(?<host>[^\s\n\t\r/:\[\]]+|\[[^\s\n\t\r/:\[\]]+\]):?(?<port>\d{1,5})?)?[/]?(?<path>[^\s\?#]{1,}(?:\?(?<query>[^\s#]+))?(?:#(?<fragment>[^\s]+))?)?"##
let regex = try! NSRegularExpression(pattern: pattern)
let testString = ##"""
example from wikipedia URI:
userinfo host port
┌─┴─────┐
user pass
┌──┴───────┴───┐┌──────┴──────┐ ┌┴─┐
https://john.doe:example@www.example.com:1234/forum/questions/?tag=networking&order=newest#top
└─┬─┘ └─────────────┬─────────────┘└───────┬───────┘ └────────────┬────────────┘ └┬┘
scheme authority path query fragment
userinfo host port
┌──┴───┐ ┌──────┴──────┐ ┌┴─┐
https://john.doe@www.example.com:1234/forum/questions/?tag=networking&order=newest#:~:text=whatever
└─┬─┘ └─────────────┬─────────────┘└───────┬───────┘ └────────────┬────────────┘ └───────┬───────┘
scheme authority path query fragment
ldap://[2001:db8::7]/c=GB?objectClass?one
└┬─┘ └─────┬─────┘└─┬─┘ └──────┬──────┘
scheme authority path query
mailto:John.Doe@example.com
└─┬──┘ └────┬─────────────┘
scheme path
news:comp.infosystems.www.servers.unix
└┬─┘ └─────────────┬─────────────────┘
scheme path
tel:+1-816-555-1212
└┬┘ └──────┬──────┘
scheme path
telnet://192.0.2.16:80/
└─┬──┘ └─────┬─────┘│
scheme authority path
urn:oasis:names:specification:docbook:dtd:xml:4.1.2
└┬┘ └──────────────────────┬──────────────────────┘
scheme path
"""##
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