| #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.Runtime.InteropServices; |
| using System.Threading; |
| using System.Threading.Tasks; |
| |
| using Grpc.Core.Logging; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core.Internal |
| { |
| internal delegate void NativeMetadataInterceptor(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr methodNamePtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy); |
| |
| internal class NativeMetadataCredentialsPlugin |
| { |
| const string GetMetadataExceptionMsg = "Exception occured in metadata credentials plugin."; |
| static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<NativeMetadataCredentialsPlugin>(); |
| static readonly NativeMethods Native = NativeMethods.Get(); |
| |
| AsyncAuthInterceptor interceptor; |
| GCHandle gcHandle; |
| NativeMetadataInterceptor nativeInterceptor; |
| CallCredentialsSafeHandle credentials; |
| |
| public NativeMetadataCredentialsPlugin(AsyncAuthInterceptor interceptor) |
| { |
| this.interceptor = GrpcPreconditions.CheckNotNull(interceptor, "interceptor"); |
| this.nativeInterceptor = NativeMetadataInterceptorHandler; |
| |
| // Make sure the callback doesn't get garbage collected until it is destroyed. |
| this.gcHandle = GCHandle.Alloc(this.nativeInterceptor, GCHandleType.Normal); |
| this.credentials = Native.grpcsharp_metadata_credentials_create_from_plugin(nativeInterceptor); |
| } |
| |
| public CallCredentialsSafeHandle Credentials |
| { |
| get { return credentials; } |
| } |
| |
| private void NativeMetadataInterceptorHandler(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr methodNamePtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy) |
| { |
| if (isDestroy) |
| { |
| gcHandle.Free(); |
| return; |
| } |
| |
| try |
| { |
| var context = new AuthInterceptorContext(Marshal.PtrToStringAnsi(serviceUrlPtr), |
| Marshal.PtrToStringAnsi(methodNamePtr)); |
| StartGetMetadata(context, callbackPtr, userDataPtr); |
| } |
| catch (Exception e) |
| { |
| Native.grpcsharp_metadata_credentials_notify_from_plugin(callbackPtr, userDataPtr, MetadataArraySafeHandle.Create(Metadata.Empty), StatusCode.Unknown, GetMetadataExceptionMsg); |
| Logger.Error(e, GetMetadataExceptionMsg); |
| } |
| } |
| |
| private async Task StartGetMetadata(AuthInterceptorContext context, IntPtr callbackPtr, IntPtr userDataPtr) |
| { |
| try |
| { |
| var metadata = new Metadata(); |
| await interceptor(context, metadata).ConfigureAwait(false); |
| |
| using (var metadataArray = MetadataArraySafeHandle.Create(metadata)) |
| { |
| Native.grpcsharp_metadata_credentials_notify_from_plugin(callbackPtr, userDataPtr, metadataArray, StatusCode.OK, null); |
| } |
| } |
| catch (Exception e) |
| { |
| Native.grpcsharp_metadata_credentials_notify_from_plugin(callbackPtr, userDataPtr, MetadataArraySafeHandle.Create(Metadata.Empty), StatusCode.Unknown, GetMetadataExceptionMsg); |
| Logger.Error(e, GetMetadataExceptionMsg); |
| } |
| } |
| } |
| } |