Fix ArgumentNullException from ClientWebSocketOptions.ClientCertifica…

…tes (#431)
graphql-dotnet · Aug 1, 2022 · 8379f8f · 8379f8f
1 parent b4c6c82
commit 8379f8f
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/GraphQL.Client/Websocket/GraphQLHttpWebSocket.cs b/src/GraphQL.Client/Websocket/GraphQLHttpWebSocket.cs
@@ -399,7 +399,9 @@ public Task InitializeWebSocket()
             // the following properties are not supported in Blazor WebAssembly and throw a PlatformNotSupportedException error when accessed
             try
             {
-                _clientWebSocket.Options.ClientCertificates = ((HttpClientHandler)Options.HttpMessageHandler).ClientCertificates;
+                var certs = ((HttpClientHandler)Options.HttpMessageHandler).ClientCertificates;
+                if (certs != null) // ClientWebSocketOptions.ClientCertificates.set throws ArgumentNullException
+                    _clientWebSocket.Options.ClientCertificates = certs;
             }
             catch (NotImplementedException)
             {