How to properly serialize the request/response objects from Kiota?

[galvesribeiro]

Hello folks!

What is the proper way to get a request or response object generated by Kiota and serialize it with System.Text.Json? If I use a regular JsonSerializer it basically serialize it wrong. having unnecessary/null/deafult fields, property names are not as defined on the schema etc.

If I try something like this (just test code):

var js = new KiotaJsonSerializationContext();
        var serializer = new JsonSerializationWriter(js);
        revalidateRequest.Serialize(serializer);
        var json = await new StreamReader(serializer.GetSerializedContent()).ReadToEndAsync();

I get this:

System.InvalidOperationException: Cannot write a JSON property within an array or as the first JSON token. Current token type is 'None'.

The reason I'm asking is that for some business requirements I have to store the exact request and response while interacting with a given service for compliance reasons.

Is there a way to get the proper JSON string serialized/deserialized the same way as Kiota do for send/receive the request/response?

Thanks!

[baywet]

Hi @galvesribeiro
Thanks for using kiota and for reaching out.

This should work better

ApiClientBuilder.RegisterDefaultSerializer<JsonSerializationWriterFactory>();
using var ms = KiotaJsonSerializer.SerializeAsStream(revalidateRequest);
using var reader = new StreamReader(ms);
var json = await reader.ReadToEndAsync();

[galvesribeiro]

var jsonSerializationOptions = new JsonSerializerOptions
        {
            WriteIndented = true,
            Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping
        };
        var kiotaJsonSerializationContext = new KiotaJsonSerializationContext(jsonSerializationOptions); // create serialization context with custom options
        SerializationWriterFactoryRegistry.DefaultInstance.ContentTypeAssociatedFactories["application/json"] = new JsonSerializationWriterFactory(kiotaJsonSerializationContext); // replace the json serializer with one with custom options

        ApiClientBuilder.RegisterDefaultSerializer<JsonSerializationWriterFactory>();
        var requestJson = await KiotaJsonSerializer.SerializeAsStringAsync(request);
        var responseJson = await KiotaJsonSerializer.SerializeAsStringAsync(response);

Thanks @andrueastman but it did had any effect.

[andrueastman]

You should probably remove this line as it will call the default constructor for JsonSerializationWriterFactory which is what we don't want.

ApiClientBuilder.RegisterDefaultSerializer<JsonSerializationWriterFactory>();

Any chance this works for you now?

[galvesribeiro]

@andrueastman nop, it didn't worked 😦

[andrueastman]

@galvesribeiro Looks like the options are not propagated to the writer in this scenario. Created https://github.com/microsoft/kiota-serialization-json-dotnet/issues/240 to look into this.
Any chance you'd be willing to submit a PR to enable this?

[andrueastman]

Addressed via this PR microsoft/kiota-dotnet#312