URI - Authority (User /Host / Port )


This page is about the authority part of an URI 1)


The authority component of a hierarchical URI is, if specified, either:


A server-based authority parses according to the familiar syntax



  • the characters @ and : stand for themselves.
  • user-info is optional and defines the credential (or the scope)
  • host and port defines a endpoint (host)


Nearly all URI schemes currently in use are server-based. An authority component that does not parse in this way is considered to be registry-based.

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