/// <exclude />
public static async IAsyncEnumerable <T> GetServerStreamingCallResult <T>(
AsyncServerStreamingCall <Message <T> > call,
CallContext?context,
[EnumeratorCancellation] CancellationToken token)
{
using (call)
{
if (context != null && !token.IsCancellationRequested)
{
var headers = await call.ResponseHeadersAsync.ConfigureAwait(false);
context.ServerResponse = new ServerResponse(
headers,
call.GetStatus,
call.GetTrailers);
}
while (await call.ResponseStream.MoveNext(token).ConfigureAwait(false))
{
yield return(call.ResponseStream.Current.Value1);
}
if (context != null && !token.IsCancellationRequested)
{
context.ServerResponse = new ServerResponse(
context.ResponseHeaders !,
call.GetStatus(),
call.GetTrailers());
}
}
}
/// <summary>
/// Tries to the get call trailers.
/// </summary>
/// <typeparam name="TResponse">The type of the response.</typeparam>
/// <param name="call">The call.</param>
/// <returns>The trailing metadata, if the call has completed, an empty metadata if the
/// call is ongoing.</returns>
/// <remarks>There is currently no exposed method in the gRPC stack to check if an API call
/// has completed.</remarks>
private Metadata TryGetCallTrailers <TResponse>(AsyncServerStreamingCall <TResponse> call)
{
try
{
return(call.GetTrailers());
}
catch (InvalidOperationException) {
return(new Metadata());
}
}
public Metadata GetTrailers()
{
return(m_Call.GetTrailers());
}