Get the domain part of an URL string?

Question

I have an NSString with an URL, in this way:

http://someurl.com/something

How would I get someurl.com only? I've already tried substringToIndex with no luck :(

Thanks in advance :)

score 100 · Accepted Answer · edited Feb 20 '18 at 14:21

100

Objective-C

NSString* urlString = @"http://someurl.com/something";
NSURL* url = [NSURL URLWithString:urlString];
NSString* domain = [url host];

Swift 2

var urlString = "http://someurl.com/something"
var url = NSURL(string: urlString)
var domain = url?.host

Swift 3+

var urlString = "http://someurl.com/something"
var url = URL(string: urlString)
var domain = url?.host

edited Feb 20 '18 at 14:21

Tamás Sengel

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answered May 28 '11 at 15:24

Stephen Darlington

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8

Almost but it leaves extra `www.` at the beginning – Vyachaslav Gerchicov Jul 08 '15 at 10:35
5

Yes, because that's part of the host name. – Stephen Darlington Jul 08 '15 at 11:49
You are mistaken. For example, read the following: http://www.webopedia.com/TERM/D/domain_name.html In short words: `http://www.pcwebopedia.com/index.html` -> `pcwebopedia.com` – Vyachaslav Gerchicov Jul 08 '15 at 12:16
3

Wikipedia says "Any name registered in the DNS is a domain name." – Stephen Darlington Jul 08 '15 at 13:19
Ok. But the idea of wiki is Everyone can write Everything he wants at any time and without additional efforts and consequences. So I don't consider its data. – Vyachaslav Gerchicov Jul 09 '15 at 06:24
1

@StephenDarlington You're right that it's part of the host name, but is there a correct way to strip the "www."? Should I just use `stringByReplacingOccurrencesOfString` or is there a better approach? – Onichan Feb 13 '16 at 07:36

score 11 · Answer 2 · answered May 28 '11 at 15:23

11

Use

[[NSURL URLWithString:@"http://someurl.com/something"] host]

answered May 28 '11 at 15:23

Deepak Danduprolu

44,595
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Alexey Lysenko · Answer 3 · 2019-11-19T11:10:23.697

6

Swift 4.2

I wrote extension for URL to take SLD. Seems, there is n

extension URL {
    /// second-level domain [SLD]
    ///
    /// i.e. `msk.ru, spb.ru`
    var SLD: String? {
        return host?.components(separatedBy: ".").suffix(2).joined(separator: ".")
    }
}

edited Nov 19 '19 at 11:10

answered Nov 19 '19 at 09:53

Alexey Lysenko

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score 2 · Answer 4 · answered Nov 16 '21 at 10:09

Swift 5

Extension to string, that gives you the domain name, while also removing "www."

extension String {
func StripURLMakeAttractive(_ url: String) -> String {
        
    let url = URL(string: url)
    guard let domain = url?.host else {return "error"}
    var modifiedDomain: String = ""
    
    var checkWWW: String = ""
    let checkIndexes = [0,1,2,3]

    for (index,char) in domain.enumerated() {
        if checkIndexes.contains(index){
            checkWWW.append(char)
        }
        if index > 3 && checkWWW.lowercased() == "www."  {
            modifiedDomain.append(char)
        }
    }
    
    if checkWWW.lowercased() == "www."{
        return modifiedDomain
    }
    else {
        return domain
    }
    
}

}

Works! I modified it to not accept any arguments and use self instead of the url param as I am calling this extension method using my URLString. — Binaya Thapa Magar, May 21 '22 at 07:37

score 1 · Answer 5 · edited Oct 26 '15 at 14:31

1

You should look at the host() method of the NSURL class.

edited Oct 26 '15 at 14:31

Paul Peelen

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answered May 28 '11 at 15:25

Brian Lyttle

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Mamad Farrahi · Answer 6 · 2022-11-17T08:51:54.323

1

Swift 5.5

extension String {
    var onlyHost: String? {
        let url = URL(string: self)
        return url?.host
    }
}

edited Nov 17 '22 at 08:51

answered Sep 27 '22 at 09:42

Mamad Farrahi

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Why an Extension to String? It doesnt't even reference `self`. Maybe you meant to write `func getHost() -> String?` without the extra String argument? – smat88dd Nov 17 '22 at 06:45

score 0 · Answer 7 · answered Jun 07 '18 at 21:48

Swift 4

And if you are using Custom url schemes say for deeplinking, for eg:

myapp:homescreen

(and don't have the "forward slashes with host name" (//www.bbc)), one solution that worked for me to extract "homescreen" is by using the index method below and then pattern matching to scrape everything after ":"

let index = absoluteString.index(absoluteString.startIndex, offsetBy: 5)
String(absoluteString[index...])

url.host or absoluteURL.host is nil in this scenario

Get the domain part of an URL string?

7 Answers7

Swift 5.5

Linked