What's the difference between Uri.Host and Uri.Authority

c# .net uri
Brian picture Brian · Jan 26, 2010 · Viewed 43k times · Source

System.Uri has Host, Authority, and DnsSafeHost. MS provides a nice example of when Host and DnsSafeHost are different here.

I'd like a similar example/explanation for Host and Authority.

Answer

Saurabh Mishra picture Saurabh Mishra · Jan 6, 2014

Yes Brandon is absolutely correct, in layman terms

Authority = Host Name + Port No

And if URL protocol is using a default port, say port 80 for http URL, then only in that case Authority = Host Name (Port No is assumed to be 80),

Whereas Host Name is either Domain Name or I.P Address

Example:

  1. http://www.example.com/

    Authority = www.example.com
    Host Name = www.example.com

  2. http://255.255.255.255:8080/

    Authority =

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