1 /* 2 * Copyright 2022 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.android.libraries.mobiledatadownload.downloader; 17 18 import javax.annotation.Nullable; 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 URL. */ 27 @Nullable provideOAuthToken(String url)28 String provideOAuthToken(String url); 29 } 30