JWTAuthorizationBinding.cs

namespace AzureFunctionAuthorization.Binding {
    public class JWTAuthorizationBinding : IBinding {

        private readonly IJWTHandlerService _jWTHandlerService;
        public JWTAuthorizationBinding(IJWTHandlerService jWTHandlerService) {
            _jWTHandlerService = jWTHandlerService;
        }
        public bool FromAttribute => true;

        public Task<IValueProvider> BindAsync(BindingContext context) {
            var data = context.BindingData["req"] as HttpRequest;
            return Task.FromResult<IValueProvider>(new JWTTokenProvider(data,_jWTHandlerService));
        }

        public Task<IValueProvider> BindAsync(object value, ValueBindingContext context) {
            return null;
        }

        public ParameterDescriptor ToParameterDescriptor() {
            return null;
        }
    }