private Task SendGraphQLSubscriptionRequest(GraphQLSubscriptionRequest graphQLSubscriptionRequest, CancellationToken cancellationToken = default)
{
var webSocketRequestString = JsonConvert.SerializeObject(graphQLSubscriptionRequest);
var arraySegmentWebSocketRequest = new ArraySegment <byte>(Encoding.UTF8.GetBytes(webSocketRequestString));
return(this.clientWebSocket.SendAsync(arraySegmentWebSocketRequest, WebSocketMessageType.Text, true, cancellationToken));
}
private Task SendCloseMessageAsync(CancellationToken cancellationToken = default)
{
var webSocketRequest = new GraphQLSubscriptionRequest {
Id = "1",
Type = GQLWebSocketMessageType.GQL_STOP,
Payload = this.graphQLRequest
};
return(this.SendGraphQLSubscriptionRequest(webSocketRequest));
}
private async Task SendInitialMessageAsync(CancellationToken cancellationToken = default)
{
var webSocketRequest = new GraphQLSubscriptionRequest {
Id = "1",
Type = GQLWebSocketMessageType.GQL_START,
Payload = this.graphQLRequest
};
var webSocketRequestString = JsonConvert.SerializeObject(webSocketRequest);
var arraySegmentWebSocketRequest = new ArraySegment <byte>(Encoding.UTF8.GetBytes(webSocketRequestString));
await this.clientWebSocket.SendAsync(arraySegmentWebSocketRequest, WebSocketMessageType.Text, true, cancellationToken).ConfigureAwait(false);
}
public async Task StartAsync(CancellationToken cancellationToken = default)
{
var clientSocket = await clientWebSocket.ConnectAsync(webSocketUri, cancellationToken);
if (clientSocket.State != WebSocketState.Open)
{
return;
}
var arraySegment = new ArraySegment <byte>(buffer);
var graphQlSubscriptionRequest = new GraphQLSubscriptionRequest
{
Id = "1",
Type = "start",
Payload = graphQLRequest
};
var jsonRequest = JsonConvert.SerializeObject(graphQlSubscriptionRequest);
var payload = new ArraySegment <byte>(Encoding.UTF8.GetBytes(jsonRequest));
await clientSocket.SendAsync(
payload,
messageType : WebSocketMessageType.Text,
endOfMessage : true,
cancellationToken : cancellationToken);
try
{
while (clientSocket.State == WebSocketState.Open)
{
cancellationToken.ThrowIfCancellationRequested();
var webSocketReceiveResult = await clientSocket.ReceiveAsync(arraySegment, cancellationToken);
var response = Encoding.UTF8.GetString(arraySegment.Array, 0, webSocketReceiveResult.Count);
var subscriptionResponse = JsonConvert.DeserializeObject <GraphQLSubscriptionResponse>(response);
if (subscriptionResponse != null)
{
LastResponse = subscriptionResponse.Payload;
OnReceive?.Invoke(subscriptionResponse.Payload);
}
}
}
catch (OperationCanceledException)
{
}
}
