private static async Task MakeServerStreamingCall(AllMethodsService.AllMethodsServiceClient client)
{
var deadline = DateTime.UtcNow.Add(TimeSpan.FromMinutes(1));
var request = new AllMethodsRequest
{
};
Console.WriteLine("starting call...");
var call = client.ServerStream(request, Metadata.Empty, deadline, CancellationToken.None);
var headers = call.ResponseHeadersAsync;
Console.WriteLine("got response headers: " + headers);
Console.WriteLine("reading response stream...");
await foreach (var m in call.ResponseStream.ReadAllAsync())
{
Console.WriteLine("read message: " + m);
}
Console.WriteLine("finished reading response stream.");
var status = call.GetStatus();
Console.WriteLine("read status: " + status);
var trailers = call.GetTrailers();
Console.WriteLine("read trailers: " + trailers);
}
public override async Task <AllMethodsResponse> Unary(AllMethodsRequest request, ServerCallContext context)
{
// by default, the server always writes some custom response headers
if (!request.DisableSendingExampleResponseHeaders)
{
await context.WriteResponseHeadersAsync(new Metadata
{
{ "server-header", "server header value" },
{ "server-header", "server header value duplicate" },
{ "server-header-bin", Encoding.UTF8.GetBytes("server header binary value") },
});
}
// always add some response trailers
context.ResponseTrailers.Add("server-trailer", "server trailer value");
context.ResponseTrailers.Add("server-trailer", "server trailer value duplicate");
context.ResponseTrailers.Add("server-trailer-bin", Encoding.UTF8.GetBytes("server trailer binary value"));
// wait for the requested amount of milliseconds
await Task.Delay(request.PleaseDelayResponseMs);
// are we requested to fail? set an error status or even throw
switch (request.PleaseFail)
{
case FailRequest.MessageThenErrorStatus:
context.Status = new Status(StatusCode.ResourceExhausted, "you requested an error");
break;
case FailRequest.ErrorStatusOnly:
throw new RpcException(
new Status(StatusCode.ResourceExhausted, "you requested an error, no message"),
new Metadata
{
{ "server-trailer", "created by rpc exception on server" }
}
);
case FailRequest.None:
context.Status = new Status(StatusCode.OK, "great!");
break;
}
return(new AllMethodsResponse
{
Answer = $"You asked: {request.Question}",
YourDeadline = context.Deadline.ToString(CultureInfo.InvariantCulture),
YourRequestHeaders = { MetadataToMap(context.RequestHeaders) },
YourFailRequest = request.PleaseFail,
});
}
static void Main(string[] args)
{
AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
var channel = GrpcChannel.ForAddress("http://localhost:5000", new GrpcChannelOptions());
var client = new AllMethodsService.AllMethodsServiceClient(channel);
try
{
var deadline = DateTime.UtcNow.Add(TimeSpan.FromMinutes(1));
var request = new AllMethodsRequest
{
PleaseFail = FailRequest.None
};
// MakeServerStreamingCall(client, deadline, request).GetAwaiter().GetResult();
MakeUnaryCall(client, deadline, request).GetAwaiter().GetResult();
}
catch (Exception exception)
{
Console.WriteLine($"ERROR");
Console.WriteLine($"{exception.Message}");
}
}
private static async Task MakeUnaryCall(AllMethodsService.AllMethodsServiceClient client, DateTime deadline, AllMethodsRequest request)
{
Console.WriteLine("starting call...");
var call = client.UnaryAsync(request, Metadata.Empty, deadline, CancellationToken.None);
var headers = await call.ResponseHeadersAsync;
Console.WriteLine("got response headers: " + headers);
Console.WriteLine("reading response...");
var msg = await call.ResponseAsync;
Console.WriteLine("got response message: " + msg);
var status = call.GetStatus();
Console.WriteLine("read status: " + status);
var trailers = call.GetTrailers();
Console.WriteLine("read trailers: " + trailers);
}
