zone_id

Return the IPv6 Zone ID

Synopsis


                template<
    class StringToken = return_string>
StringToken::result_type
zone_id(
    StringToken&& token);

Declared in file <boost/url/url_view_base.hpp> at line 1406

Description

If the host type is host_type::ipv6, this function returns the Zone ID as a string. Otherwise an empty string is returned. Any percent-escapes in the string are decoded first.

Example


assert( url_view( "http://[fe80::1%25eth0]/" ).zone_id() == "eth0" );

Complexity

Linear in `this->encoded_zone_id().size()`.

Exception Safety

Calls to allocate may throw.

BNF


host        = IP-literal / IPv4address / reg-name

IP-literal = "[" ( IPv6address / IPv6addrz / IPvFuture  ) "]"

ZoneID = 1*( unreserved / pct-encoded )

IPv6addrz = IPv6address "%25" ZoneID

Specification

Representing IPv6 Zone Identifiers in Address Literals and Uniform Resource Identifiers