HTTP Interceptors

Pilets can add global HTTP interceptors, which will be triggered for all HTTP requests using the global HttpClient. This can be done by adding a singleton IHttpInterceptor to the services, e.g.:

public class Module
{
    public static void Main() {}

    public static void ConfigureServices(IServiceCollection services)
    {
        services.AddSingleton<IHttpInterceptor, MyInterceptor>();
    }
}

The interceptor itself has methods to react to a request (before sending the actual request) or response (after receiving the response).

class MyInterceptor : IHttpInterceptor
{
    public Task<HttpRequestMessage> OnRequest(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        // Add some header
        request.Headers.Add("x-foo-bar", "other");
        return Task.FromResult(request);
    }

    public Task<HttpResponseMessage> OnResponse(HttpResponseMessage response, CancellationToken cancellationToken)
    {
        // Don't do anything
        return Task.FromResult(response);
    }
}

In case you want to intercept calls for injecting a bearer token obtained from calling the getAccessCode() pilet API you can just add a simple convenience service:

public class Module
{
    public static void Main() {}

    public static void ConfigureServices(IServiceCollection services)
    {
        services.AddAccessCodeInterceptor();
    }
}

This way the current access code is retrieved and inserted into the request via the Authorization header.