.NET: Bug: extra-parameters needed in HttpClient for Mistral

[williambohrmann3]

Describe the bug
I am getting a 400 bad request exception for Mistral chat completions when I don't specify an HttpClient with the following header

DefaultRequestHeaders =
{
    {  "extra-parameters", "pass-through" },
}

Expected behavior
A clear and concise description of what you expected to happen.

To Reproduce
Run reproducer code
https://github.com/williambohrmann3/SemanticKernelMistralBug/blob/master/Program.cs

Expected behavior
The HttpRequest parameter is marked as optional, so this header shouldn't be required. It should "just work".

Platform

• Language: C#
• Source: NuGet 1.47.0-alpha
• AI model: MistralAI:mistral-large-latest
• IDE: Visual Studio
• OS: Windows

Additional context
Interestingly, Python devs using the Mistral connector for LangChain are getting the same error message.
https://learn.microsoft.com/en-us/answers/questions/2117664/my-mistral-large-2407-serverless-deployment-api-is

https://learn.microsoft.com/en-us/answers/questions/2113323/((detail-extra-parameters-(safe-prompt)-are-not-al

Deep in the stack trace, after enabling language runtime exceptions, my colleague found the following error

Error code: 400 - {'detail': "Extra parameters ['n'] are not allowed when extra-parameters is not set or set to be 'error'. Set extra-parameters to 'pass-through' to pass to the model."}

[williambohrmann3]

The Mistral endpoint I am using is serverless, alike the Python LangChain user from the Microsoft Q+A linked above

[shethaadit]

Hi @RogerBarreto / @westey-m, I have raised PR to fix this. Will monitor for the green build. :)

[donatas-xyz]

I have exactly the same setup and error, but my Mistral Chat Completion service is not accepting HttpClient?

public static IServiceCollection AddMistralChatCompletion(
    this IServiceCollection services,
    string modelId,
    string apiKey,
    Uri? endpoint = null,
    string? serviceId = null)
{
    Verify.NotNull(services);

    return services.AddKeyedSingleton<IChatCompletionService>(serviceId, (serviceProvider, _) =>
        new MistralAIChatCompletionService(modelId, apiKey, endpoint, HttpClientProvider.GetHttpClient(serviceProvider)));
}

What am I missing?

[RogerBarreto]

@donatas-xyz, HttpClientProvider.GetHttpClient(serviceProvider) attempts to get it using the serviceProvider.GetService<HttpClient>();

If you don't have one registered it will create a new HttpClient without the header setting. Without the header setting you may see the same error.

The PR #11646 will fix this.