| #region Copyright notice and license |
| |
| // Copyright 2015 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #endregion |
| |
| using System; |
| using System.Threading; |
| using System.Threading.Tasks; |
| |
| using Google.Apis.Auth.OAuth2; |
| using Grpc.Core; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Auth |
| { |
| /// <summary> |
| /// Factory methods to create authorization interceptors for Google credentials. |
| /// <seealso cref="GoogleGrpcCredentials"/> |
| /// </summary> |
| public static class GoogleAuthInterceptors |
| { |
| private const string AuthorizationHeader = "Authorization"; |
| private const string Schema = "Bearer"; |
| |
| /// <summary> |
| /// Creates an <see cref="AsyncAuthInterceptor"/> that will obtain access token from any credential type that implements |
| /// <c>ITokenAccess</c>. (e.g. <c>GoogleCredential</c>). |
| /// </summary> |
| /// <param name="credential">The credential to use to obtain access tokens.</param> |
| /// <returns>The interceptor.</returns> |
| public static AsyncAuthInterceptor FromCredential(ITokenAccess credential) |
| { |
| return new AsyncAuthInterceptor(async (context, metadata) => |
| { |
| var accessToken = await credential.GetAccessTokenForRequestAsync(context.ServiceUrl, CancellationToken.None).ConfigureAwait(false); |
| metadata.Add(CreateBearerTokenHeader(accessToken)); |
| }); |
| } |
| |
| /// <summary> |
| /// Creates an <see cref="AsyncAuthInterceptor"/> that will use given access token as authorization. |
| /// </summary> |
| /// <param name="accessToken">OAuth2 access token.</param> |
| /// <returns>The interceptor.</returns> |
| public static AsyncAuthInterceptor FromAccessToken(string accessToken) |
| { |
| GrpcPreconditions.CheckNotNull(accessToken); |
| return new AsyncAuthInterceptor((context, metadata) => |
| { |
| metadata.Add(CreateBearerTokenHeader(accessToken)); |
| return TaskUtils.CompletedTask; |
| }); |
| } |
| |
| private static Metadata.Entry CreateBearerTokenHeader(string accessToken) |
| { |
| return new Metadata.Entry(AuthorizationHeader, Schema + " " + accessToken); |
| } |
| } |
| } |