1 // Copyright 2021 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package com.google.android.downloader; 16 17 import com.google.common.util.concurrent.ListenableFuture; 18 import java.net.URI; 19 20 /** 21 * Provider interface for supplying OAuth tokens for a request. The tokens generated by this method 22 * are added to requests as http headers. For more details, see the official spec for this 23 * authorization mechanism: https://tools.ietf.org/html/rfc6750#page-5 24 */ 25 public interface OAuthTokenProvider { 26 /** Provides an OAuth bearer token for the given URI. */ provideOAuthToken(URI uri)27 ListenableFuture<String> provideOAuthToken(URI uri); 28 } 29