static async Task Main(string[] args)
{
// DI
var services = new ServiceCollection();
var loggerFactory = LoggerFactory.Create(logging =>
{
logging.AddConsole();
logging.SetMinimumLevel(LogLevel.Debug);
});
var serverErrors = new HttpStatusCode[] {
HttpStatusCode.BadGateway,
HttpStatusCode.GatewayTimeout,
HttpStatusCode.ServiceUnavailable,
HttpStatusCode.InternalServerError,
HttpStatusCode.TooManyRequests,
HttpStatusCode.RequestTimeout
};
var gRpcErrors = new StatusCode[] {
StatusCode.DeadlineExceeded,
StatusCode.Internal,
StatusCode.NotFound,
StatusCode.ResourceExhausted,
StatusCode.Unavailable,
StatusCode.Unknown
};
Func <HttpRequestMessage, IAsyncPolicy <HttpResponseMessage> > retryFunc = (request) =>
{
return(Policy.HandleResult <HttpResponseMessage>(r => {
var grpcStatus = StatusManager.GetStatusCode(r);
var httpStatusCode = r.StatusCode;
return (grpcStatus == null && serverErrors.Contains(httpStatusCode)) || // if the server send an error before gRPC pipeline
(httpStatusCode == HttpStatusCode.OK && gRpcErrors.Contains(grpcStatus.Value)); // if gRPC pipeline handled the request (gRPC always answers OK)
})
.WaitAndRetryAsync(3, (input) => TimeSpan.FromSeconds(3 + input), (result, timeSpan, retryCount, context) =>
{
var grpcStatus = StatusManager.GetStatusCode(result.Result);
Console.WriteLine($"Request failed with {grpcStatus}. Retry");
}));
};
/*
* var channel = new Channel("https://localhost:5001", ChannelCredentials.Insecure, new [] {
* new ChannelOption("grpc.max_receive_message_length","5242880") // 5 MB
* });
* var countryClient = new CountryServiceClient(channel);
*
*
* var country = await countryClient.GetByIdAsync(new CountrySearchRequest { CountryId = 1 });
*/
// https://grpcwebdemo.azurewebsites.net
// gRPC
services.AddGrpcClient <CountryServiceClient>(o =>
{
o.Address = new Uri("https://localhost:5001");
}).AddPolicyHandler(retryFunc);
var provider = services.BuildServiceProvider();
var client = provider.GetRequiredService <CountryServiceClient>();
/*
* // https://grpcwebdemo.azurewebsites.net
* // gRPC-Web
* var handler = new GrpcWebHandler(GrpcWebMode.GrpcWebText, new HttpClientHandler());
* var channel = GrpcChannel.ForAddress("https://localhost:5001", new GrpcChannelOptions
* {
* HttpClient = new HttpClient(handler),
* LoggerFactory = loggerFactory
* });
* var clientWeb = new CountryServiceClient(channel);
*/
try
{
//// Get all gRPC
//var countries = (await client.GetAllAsync(new EmptyRequest())).Countries.Select(x => new Country
//{
// CountryId = x.Id,
// Description = x.Description,
// CountryName = x.Name
//}).ToList();
//Console.WriteLine("Found countries");
//countries.ForEach(x => Console.WriteLine($"Found country {x.CountryName} ({x.CountryId}) {x.Description}"));
//Console.WriteLine();
//Console.WriteLine();
//// Get all gRPC - web
//var countriesweb = (await clientWeb.GetAllAsync(new EmptyRequest())).Countries.Select(x => new Country
//{
// CountryId = x.Id,
// Description = x.Description,
// CountryName = x.Name
//}).ToList();
//Console.WriteLine("Found countries with gRPC-Web");
//countriesweb.ForEach(x => Console.WriteLine($"Found country with gRPC-Web: {x.CountryName} ({x.CountryId}) {x.Description}"));
// Create
var createdCountry = await client.CreateAsync(new CountryCreateRequest { Name = "Japan", Description = "" });
//var createdCountry2 = await clientWeb.CreateAsync(new CountryCreateRequest { Name = "Japan", Description = "" });
}
catch (RpcException e)
{
var errors = e.GetValidationErrors(); // Gets validation errors list
Console.WriteLine(e.Message);
}
}
