public void ReceiveEventStreamInChunks()
{
// This simply verifies that chunked streaming works as expected and that events are being
// parsed correctly regardless of how the chunks line up with the events.
var eventData = new List <string>();
for (var i = 0; i < 200; i++)
{
eventData.Add(string.Format("data{0}", i) + new string('x', i % 7));
}
var allBody = string.Concat(eventData.Select(data => "data:" + data + "\n\n"));
var allEventsReceived = new TaskCompletionSource <bool>();
IEnumerable <string> MakeChunks()
{
var i = 0;
for (var pos = 0; ;)
{
int chunkSize = i % 20 + 1;
if (pos + chunkSize >= allBody.Length)
{
yield return(allBody.Substring(pos));
break;
}
yield return(allBody.Substring(pos, chunkSize));
pos += chunkSize;
i++;
}
}
try
{
Handler streamHandler = Handlers.StartChunks("text/event-stream")
.Then(async ctx =>
{
foreach (var s in MakeChunks())
{
await Handlers.WriteChunkString(s)(ctx);
}
await allEventsReceived.Task;
});
using (var server = HttpServer.Start(streamHandler))
{
var expectedActions = new List <EventSink.Action>();
expectedActions.Add(EventSink.OpenedAction());
foreach (var data in eventData)
{
expectedActions.Add(EventSink.MessageReceivedAction(new MessageEvent(MessageEvent.DefaultName, data, server.Uri)));
}
var config = Configuration.Builder(server.Uri).LogAdapter(_testLogging).Build();
using (var es = new EventSource(config))
{
var sink = new EventSink(es);
_ = es.StartAsync();
sink.ExpectActions(expectedActions.ToArray());
}
}
}
finally
{
allEventsReceived.SetResult(true);
}
}
