WSS in case of HTTPS (#67)

* force secure mode

* .

Author: Raul Hidalgo Caballero

src/GraphQL.Client/Http/GraphQLHttpClient.cs

@@ -90,14 +90,14 @@ public GraphQLHttpClient(GraphQLHttpClientOptions options) {
 			this.graphQLHttpHandler = new GraphQLHttpHandler(options);
 		}
 
-		internal GraphQLHttpClient(GraphQLHttpClientOptions options,HttpClient httpClient) {
+		internal GraphQLHttpClient(GraphQLHttpClientOptions options, HttpClient httpClient) {
 			if (options == null) { throw new ArgumentNullException(nameof(options)); }
 			if (options.EndPoint == null) { throw new ArgumentNullException(nameof(options.EndPoint)); }
 			if (options.JsonSerializerSettings == null) { throw new ArgumentNullException(nameof(options.JsonSerializerSettings)); }
 			if (options.HttpMessageHandler == null) { throw new ArgumentNullException(nameof(options.HttpMessageHandler)); }
 			if (options.MediaType == null) { throw new ArgumentNullException(nameof(options.MediaType)); }
 
-			this.graphQLHttpHandler = new GraphQLHttpHandler(options,httpClient);
+			this.graphQLHttpHandler = new GraphQLHttpHandler(options, httpClient);
 		}
 
 		public Task<GraphQLResponse> SendQueryAsync(string query, CancellationToken cancellationToken = default) =>
@@ -121,7 +121,8 @@ public Task<IGraphQLSubscriptionResult> SendSubscribeAsync(GraphQLRequest reques
 			if (request == null) { throw new ArgumentNullException(nameof(request)); }
 			if (request.Query == null) { throw new ArgumentNullException(nameof(request.Query)); }
 
-			var webSocketUri = new Uri($"ws://{this.EndPoint.Host}:{this.EndPoint.Port}{this.EndPoint.AbsolutePath}");
+			var webSocketSchema = this.EndPoint.Scheme == "https" ? "wss" : "ws";
+			var webSocketUri = new Uri($"{webSocketSchema}://{this.EndPoint.Host}:{this.EndPoint.Port}{this.EndPoint.AbsolutePath}");
 			var graphQLSubscriptionResult = new GraphQLHttpSubscriptionResult(webSocketUri, request);
 			graphQLSubscriptionResult.StartAsync(cancellationToken);
 			return Task.FromResult((IGraphQLSubscriptionResult)graphQLSubscriptionResult);

src/GraphQL.Client/Http/GraphQLHttpSubscriptionResult.cs

@@ -61,6 +61,7 @@ private Task SendInitialMessageAsync(CancellationToken cancellationToken = defau
 		}
 
 		private static class GQLWebSocketMessageType {
+
 			/// <summary>
 			///     Client sends this message after plain websocket connection to start the communication with the server
 			///     The server will response only with GQL_CONNECTION_ACK + GQL_CONNECTION_KEEP_ALIVE(if used) or GQL_CONNECTION_ERROR
@@ -142,6 +143,7 @@ private static class GQLWebSocketMessageType {
 			///     id: string : operation id
 			/// </summary>
 			public const string GQL_STOP = "stop"; // Client -> Server
+
 		}
 
 	}

src/GraphQL.Client/Http/Internal/GraphQLHttpHandler.cs

@@ -87,7 +87,8 @@ public async Task<GraphQLResponse> ReadHttpResponseMessageAsync(HttpResponseMess
 				};
 				try {
 					return jsonSerializer.Deserialize<GraphQLResponse>(jsonTextReader);
-				} catch (JsonReaderException exception) {
+				}
+				catch (JsonReaderException exception) {
 					if (httpResponseMessage.IsSuccessStatusCode) {
 						throw exception;
 					}

src/GraphQL.Client/Obsolete.GraphQLClient.Extensions.cs

@@ -9,7 +9,7 @@ namespace GraphQL.Client {
 	/// <summary>
 	/// Extension Methods for <see cref="GraphQLClient"/>
 	/// </summary>
-	[Obsolete()]
+	[Obsolete]
 	public static class GraphQLClientExtensions {
 
 		private const string IntrospectionQuery = @"