| #region Copyright notice and license |
| |
| // Copyright 2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #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); |
| } |
| } |
| } |