okhttp3

接口 Dns

public interface Dns

A domain name service that resolves IP addresses for host names. Most applications will use the system DNS service, which is the default. Some applications may provide their own implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4 addresses, or to force a specific known IP address.

Implementations of this interface must be safe for concurrent use.

字段概要

字段

限定符和类型	字段和说明
static Dns	SYSTEM A DNS that uses InetAddress.getAllByName(java.lang.String) to ask the underlying operating system to lookup IP addresses.

方法概要

限定符和类型	方法和说明
java.util.List<java.net.InetAddress>	lookup(java.lang.String hostname) Returns the IP addresses of hostname, in the order they will be attempted by OkHttp.

字段详细资料

SYSTEM

static final Dns SYSTEM

A DNS that uses InetAddress.getAllByName(java.lang.String) to ask the underlying operating system to lookup IP addresses. Most custom Dns implementations should delegate to this instance.

方法详细资料

lookup

java.util.List<java.net.InetAddress> lookup(java.lang.String hostname)
                                     throws java.net.UnknownHostException

Returns the IP addresses of hostname, in the order they will be attempted by OkHttp. If a connection to an address fails, OkHttp will retry the connection with the next address until either a connection is made, the set of IP addresses is exhausted, or a limit is exceeded.

抛出:

java.net.UnknownHostException