ASPNET CORE GRPC 异步拦截器方法答案

【问题标题】：ASPNET CORE GRPC async interceptor methodASPNET CORE GRPC 异步拦截器方法
【发布时间】：2020-12-04 01:39:57
【问题描述】：

我正在尝试异步创建一个新的 AsyncUnaryCall 实例，该实例包装了原始接收的实例。

问题是拦截器基类的设计不佳，它不允许异步方法拦截器。（如此处所述：https://github.com/grpc/grpc-dotnet/issues/694）

为了得到这个想法，这是想要实现的目标：

public override AsyncUnaryCall<TResponse> AsyncUnaryCall<TRequest, TResponse>(TRequest request, ClientInterceptorContext<TRequest, TResponse> context, AsyncUnaryCallContinuation<TRequest, TResponse> continuation)
{
    var result = await MyAsyncStuff(); // if we can not await, what is the alternative?

    return new AsyncUnaryCall<TResponse>(paramters);
}

【问题讨论】：

标签： c# asp.net-core grpc-dotnet

【解决方案1】：

    public override AsyncUnaryCall<TResponse> AsyncUnaryCall<TRequest, TResponse>(TRequest request, ClientInterceptorContext<TRequest, TResponse> context, AsyncUnaryCallContinuation<TRequest, TResponse> continuation)
    {
        var response = continuation(request, context);
        var task = MyAsyncStuff(response);
        return new AsyncUnaryCall<TResponse>(task, response.ResponseHeadersAsync, response.GetStatus, response.GetTrailers, response.Dispose);
    }

    private async Task<TResponse> MyAsyncStuff<TResponse>(AsyncUnaryCall<TResponse> responseAsync)
    {
        return await responseAsync;
    }

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【讨论】：