1. 在gRPC服务端的Startup.cs文件中添加下列代码：

services.AddAuthorization(options => { options.DefaultPolicy = new AuthorizationPolicyBuilder() .RequireAuthenticatedUser() .AddRequirements(new AllowAnonymousAttribute()) .Build(); });

2. 然后，在gRPC客户端的Program.cs文件中添加下列代码：

var metadata = new Metadata(); metadata.Add("Authorization", "Bearer " + token);

3. 将token替换成实际的JWT令牌，运行应用程序即可解决问题。

完整代码示例：

在gRPC服务端Startup.cs文件中：

public void ConfigureServices(IServiceCollection services) { services.AddGrpc(); services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme) .AddJwtBearer(options => { options.Authority = "https://localhost:5001"; options.Audience = "resource_server"; options.TokenValidationParameters = new TokenValidationParameters { ValidateAudience = false }; });

services.AddAuthorization(options =>
{
    options.DefaultPolicy = new AuthorizationPolicyBuilder()
        .RequireAuthenticatedUser()
        .AddRequirements(new AllowAnonymousAttribute())
        .Build();
});

}

在gRPC客户端Program.cs文件中：

static async Task Main(string[] args) { var httpClientHandler = new HttpClientHandler { ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator }; var httpClient = new HttpClient(httpClientHandler) { BaseAddress = new Uri("https://localhost:5002") }; var channel = GrpcChannel.ForAddress("https://localhost:5003", new GrpcChannelOptions { HttpClient = httpClient }); var client = new Greeter.GreeterClient(channel);

var token = await GetAccessToken();
var metadata = new Metadata();
metadata.Add("Authorization", "Bearer " + token);
var reply = await client.SayHelloAsync(new HelloRequest { Name = "GreeterClient" }, metadata);
Console.WriteLine("Greeting: " + reply.Message);

}

注意：GetAccessToken()方法用于获取JWT令牌，需要根据实际情