CODEWITHSUNDEEP
c#asp.net
Michel
Michel

Reputation: 23635

easy way to get the top level domain?

i want to get the domain extention (at least i hope it is called this way) from the site name the user is currently on.

so from www.bbc.co.uk it's co.uk and www.google.com = .com https://stackoverflow.com/questions/ask = .com

etc.

especially the ones with the double name (like co.uk) gives me headaches....

EDIT as i understand from the comments, co.uk is not a top level domain? that makes life easier! EDIT new name (top level domain) in the title

Upvotes: 2

Views: 3391

Answers (5)

live2
live2

Reputation: 4275

The PublicSuffix project from mozilla is the solution. It is a maintained list of TLD.

You can use the following nuget package Nager.PublicSuffix.

PM> Install-Package Nager.PublicSuffix

Example

var ruleProvider = new SimpleHttpRuleProvider();
await ruleProvider.BuildAsync();

var domainParser = new DomainParser(ruleProvider);

var domainInfo = domainParser.Parse("sub.test.co.uk");
//domainInfo.Domain = "test";
//domainInfo.Hostname = "sub.test.co.uk";
//domainInfo.RegistrableDomain = "test.co.uk";
//domainInfo.SubDomain = "sub";
//domainInfo.TLD = "co.uk";

Upvotes: 3

Henk Holterman
Henk Holterman

Reputation: 273439

It's called a toplevel domain (tld) but for the BBC that's just "uk", not "co.uk".

What you want does not follow a standard so you'll need a table to check 'potential' pseudo-tld's

Upvotes: 3

jcolebrand
jcolebrand

Reputation: 16035

It's called the Top Level Domain and then there's the first sub-domain, which not everyone uses. It's because the first DNS did reverse entries on the split list, to route faster, so it would've parsed to 

uk -> co -> example -> www

Upvotes: 0

Stuart
Stuart

Reputation: 575

The .co.uk is the .co subdomain of the .uk tld. This question doesn't make sense in terms of the actual structure of dns.

Upvotes: 2

Gelatin
Gelatin

Reputation: 2413

See this question

Regular expression to retrieve domain.tld

The .NET URI class can also retrieve the hostname, of course.

Upvotes: 1

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