53 lines
2.1 KiB
Java
53 lines
2.1 KiB
Java
/* GENERATED SOURCE. DO NOT MODIFY. */
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/*
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* Copyright (C) 2012 Square, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.okhttp;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import java.util.Arrays;
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import java.util.List;
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/**
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* A domain name service that resolves IP addresses for host names. Most applications will use the
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* {@linkplain #SYSTEM system DNS service}, which is the default. Some applications may provide
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* their own implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4
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* addresses, or to force a specific known IP address.
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*
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* <p>Implementations of this interface must be safe for concurrent use.
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* @hide This class is not part of the Android public SDK API
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*/
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public interface Dns {
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/**
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* A DNS that uses {@link InetAddress#getAllByName} to ask the underlying operating system to
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* lookup IP addresses. Most custom {@link Dns} implementations should delegate to this instance.
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*/
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Dns SYSTEM = new Dns() {
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@Override public List<InetAddress> lookup(String hostname) throws UnknownHostException {
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if (hostname == null) throw new UnknownHostException("hostname == null");
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return Arrays.asList(InetAddress.getAllByName(hostname));
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}
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};
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/**
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* Returns the IP addresses of {@code hostname}, in the order they will be attempted by OkHttp.
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* If a connection to an address fails, OkHttp will retry the connection with the next address
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* until either a connection is made, the set of IP addresses is exhausted, or a limit is
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* exceeded.
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*/
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List<InetAddress> lookup(String hostname) throws UnknownHostException;
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}
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