boost::urls::authority_view::port Return the port Synopsis Declared in header <boost/url/authority_view.hpp> core::string_view port() const noexcept; Description If present, this function returns a string representing the port (which may be empty). Otherwise it returns an empty string. assert( url_view( "http://localhost.com:8080" ).port() == "8080" ); Constant. Throws nothing. port = *DIGIT 3.2.3. Port (rfc3986) See Also encoded_host_and_port , has_port , port_number .