public override async Task ServerStream(ServerStreamRequest request, IServerStreamWriter <ServerStreamResponse> responseStream, ServerCallContext context)
{
var responseDelay = TimeSpan.FromMilliseconds(100);
_logger.LogInformation("=> ServerStream({})", request.Message);
while (!context.CancellationToken.IsCancellationRequested)
{
try
{
var ticks = Stopwatch.GetTimestamp();
await responseStream.WriteAsync(new ServerStreamResponse {
Message = $"Message #{ticks}",
Payload = Payload,
Timestamp = ticks
});
var elapsedTicks = Stopwatch.GetTimestamp() - ticks;
var elapsed = elapsedTicks > 0 ? TimeSpan.FromTicks(elapsedTicks) : TimeSpan.Zero;
if (responseDelay > elapsed)
{
await Task.Delay(responseDelay.Subtract(elapsed), context.CancellationToken);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Unexpected error");
}
}
}
private async Task ServerStreamWorkerAsync(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
try
{
_logger.LogInformation("<= ServerStream()");
var request = new ServerStreamRequest {
Message = "Please start stream"
};
using (var responseStream = _myStackServerClient.ServerStream(request, cancellationToken: cancellationToken))
{
while (await responseStream.ResponseStream.MoveNext(cancellationToken))
{
var response = responseStream.ResponseStream.Current;
var payloadSizeKb = response.Payload.Length / 1024;
var elapsed = TimeSpan.FromTicks(Stopwatch.GetTimestamp() - response.Timestamp);
await Console.Out.WriteLineAsync($"=> {payloadSizeKb} KB in {elapsed.TotalMilliseconds}");
}
_logger.LogInformation("No more data from server");
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Unexpected error");
}
}
}
/// <summary>
/// 读文件
/// </summary>
/// <param name="request"></param>
/// <param name="responseStream"></param>
/// <param name="context"></param>
/// <returns></returns>
public override async Task ServerStream(ServerStreamRequest request, IServerStreamWriter <ServerStreamResponse> responseStream, ServerCallContext context)
{
using var fs = File.Open(request.FilePath, FileMode.Open);
var leftSize = fs.Length;
var buff = new byte[1048576]; // 1M 分批返回
while (leftSize > 0)
{
var len = await fs.ReadAsync(buff);
leftSize -= len;
Console.WriteLine($"response {len} bytes");
await responseStream.WriteAsync(new ServerStreamResponse
{
Data = ByteString.CopyFrom(buff, 0, len)
});
}
}
