How to get the original Http Response?

[wutever0]

Sometimes I make graphQL requests using graphQL client but the server returns something like this:

"GraphQL.Validation.InvalidVariableError: Variable '$filter' is invalid. Unrecognized input fields 'operation' for type 'FilterGQLInputType'.\n at GraphQL.Validation.ValidationContext.<GetVariableValue>g__ParseValueObject|39_3(IInputObjectGraphType graphType, VariableDefinition variableDef, VariableName variableName, Object value, IVariableVisitor visitor) in /_/src/GraphQL/Validation/ValidationContext.cs:line 452\n at GraphQL.Validation.ValidationContext.<GetVariableValue>g__ParseValue|39_0(IGraphType type, VariableDefinition variableDef, VariableName variableName, Object value, IVariableVisitor visitor) in /_/src/GraphQL/Validation/ValidationContext.cs:line 297\n at GraphQL.Validation.ValidationContext.GetVariableValues(ISchema schema, VariableDefinitions variableDefinitions, Inputs inputs, IVariableVisitor visitor) in /_/src/GraphQL/Validation/ValidationContext.cs:line 231"

Obviously this won't be mapped or deserialized into any object and then graphQL throws an exception which is all good but I am unable to get the raw response all I get is the exception:

The JSON value could not be converted to GraphQL.GraphQLResponse1[ExtraEgypt.Models.Subsbase.CustomerQueryResponse]. Path: $ | LineNumber: 0 | BytePositionInLine: 895.

I would also like to get the original HTTP response (shown at the top) for logging purposes otherwise it becomes very difficult to understand what happened.

[sungam3r]

Obviously this won't be mapped or deserialized into any object

I think this points out that GraphQL server is misconfigured and returns plain text response instead of one required by the spec. I see use uses GraphQL.NET as server. Could you provide your server startup configuration code (AddGraphQL() stuff) and versions of used packages?

[sungam3r]

Regarding your second question - for now you may use GraphQLHttpClientOptions.IsValidResponseToDeserialize to hook up into process of handling HttpResponseMessage.

[daef]

easier said than done: the responsestream was already consumed inside IsValidResponseToDeserialize

[daef]

I was able to help myself by encapsulating the serializer like this:

public class DebugSerializer : IGraphQLWebsocketJsonSerializer {
    NewtonsoftJsonSerializer impl = new();

    public byte[] SerializeToBytes(GraphQLWebSocketRequest request)
        => impl.SerializeToBytes(request);

    public Task<WebsocketMessageWrapper> DeserializeToWebsocketResponseWrapperAsync(Stream stream)
        => impl.DeserializeToWebsocketResponseWrapperAsync(stream);

    public GraphQLWebSocketResponse<TResponse> DeserializeToWebsocketResponse<TResponse>(byte[] bytes)
        => impl.DeserializeToWebsocketResponse<TResponse>(bytes);

    public string SerializeToString(GraphQLRequest request)
        => impl.SerializeToString(request);

    public Task<GraphQLResponse<TResponse>> DeserializeFromUtf8StreamAsync<TResponse>(Stream stream, CancellationToken cancellationToken) {
        using (var sr = new StreamReader(stream, Encoding.UTF8)) {
            var res = sr.ReadToEnd();
            Console.WriteLine(res);
            using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(res)))
                return impl.DeserializeFromUtf8StreamAsync<TResponse>(ms, cancellationToken);
        }
    }
}

And use it instead of the default:

var api = new GraphQLHttpClient(
    "https://my.service/ql",
    new DebugSerializer());
var res = await api.SendMutationAsync(...);

[wutever0]

Obviously this won't be mapped or deserialized into any object

I think this points out that GraphQL server is misconfigured and returns plain text response instead of one required by the spec. I see use uses GraphQL.NET as server. Could you provide your server startup configuration code (AddGraphQL() stuff) and versions of used packages?

I don't have access to the server it's a third party service.

[rose-a]

GraphQL.Validation.InvalidVariableError: Variable '$filter' is invalid. Unrecognized input fields 'operation' for type 'FilterGQLInputType'.\n at GraphQL.Validation.ValidationContext.

Are you putting the operation name into the variables object?