从依赖注入容器.NET CORE中读取请求标头

Question

我有一些疑问，要使用.NET Core从DI容器访问HTTPContext（我使用的.NET 6是特定的）。我的目的是获取请求标题，例如相关性。这是我的DI容器代码。

        services.AddControllers()
                .ConfigureApiBehaviorOptions(o =>
                {
                    o.InvalidModelStateResponseFactory = c =>
                    {
                        var keys = c.ModelState.Where(l => l.Value.Errors.Count > 0).Select(k => k.Key).ToList();
                        string error = string.Empty;

                        if (keys != null)
                        {
                            error = keys.Count <= 1 ? keys[0] : keys[1];
                            error = error.Replace("$.", string.Empty);
                        }

                        error = $"Field: {error}. Message: {c.ModelState.Values.ElementAt(0).Errors[0].ErrorMessage}";
                        
                        //GET REQUEST HEADER
                        //string correlationId = retrieve correlationId from request header
                        Response response = new();
                        response.Fail(correlatinId, error);

                        return new BadRequestObjectResult(response);
                    };
                })
                .AddFluentValidation(o =>
                {
                    o.ImplicitlyValidateChildProperties = true;
                    o.ImplicitlyValidateRootCollectionElements = true;
                    o.RegisterValidatorsFromAssemblyContaining<LogErrorValidation>();
                });

我的代码段的目的是用自定义响应模型覆盖不良请求响应模型，因为我正在使用流利的验证。我的自定义响应模型由 coloreLationId（guid）和消息（字符串）组成。

是否可以从DI容器中检索请求标头？

谢谢。

Answer 1

Welp，我想我想念一些东西，可以做到

services.AddControllers()
                .ConfigureApiBehaviorOptions(o =>
                {
                    o.InvalidModelStateResponseFactory = c =>
                    {
                        var keys = c.ModelState.Where(l => l.Value.Errors.Count > 0).Select(k => k.Key).ToList();
                        string error = string.Empty;

                        if (keys != null)
                        {
                            error = keys.Count <= 1 ? keys[0] : keys[1];
                            error = error.Replace("$.", string.Empty);
                        }
                        //Read HTTP Context from Action Context (in this case is c)
                        var correlationId = c.HttpContext?.Request?.Headers?["CorrelationId"].FirstOrDefault();
                        error = $"Field: {error}. Message: {c.ModelState.Values.ElementAt(0).Errors[0].ErrorMessage}";

                        Response response = new();
                        response.Fail(correlationId, error);

                        return new BadRequestObjectResult(response);
                    };
                })
                .AddFluentValidation(o =>
                {
                    o.ImplicitlyValidateChildProperties = true;
                    o.ImplicitlyValidateRootCollectionElements = true;
                    o.RegisterValidatorsFromAssemblyContaining<LogErrorValidation>();
                });