services.AddMvc().ConfigureApiBehaviorOptions 的 Azure Functions 等效项是什么？如果不存在，必须采取什么方法？

Question

我是 Azure Functions 新手，请帮忙！

我的 WebAPI 中有以下代码来验证传递的每个参数并为每个参数抛出相应的错误。甚至在控件进入控制器之前就会引发错误，我希望在我的 Azure 函数中出现类似的内容。

下面是WebAPI代码。

启动.cs

public void ConfigureServices(IServiceCollection services)
{
//other code here

services.AddMvc()
    .ConfigureApiBehaviorOptions(options =>
    {
        options.InvalidModelStateResponseFactory = actionContext =>
        {
            return this.CustomErrorResponse(actionContext);
        };
    });

//other code here
}

private BadRequestObjectResult CustomErrorResponse(ActionContext actionContext)
{
    ////BadRequestObjectResult is class found Microsoft.AspNetCore.Mvc and is inherited from ObjectResult.
    return new BadRequestObjectResult(actionContext.ModelState
     .Where(modelError => modelError.Value.Errors.Count > 0)
     .Select(modelError => new Error
     {
         ErrorField = modelError.Key,
         StatusCode = 400,
         ErrorDescription = modelError.Value.Errors.FirstOrDefault().ErrorMessage
     }).ToList());
}

我尝试在Azure Functions中使用相同的代码，但它不起作用，似乎ConfigureApibehaviorOptions甚至没有触发。我尝试在 google 上搜索了很多 StackOverFlow 但没有找到合适的答案，因此提出了这个问题。

我应该为此使用任何自定义过滤器吗？如果是，具体如何？

Answer 1

services.AddMvc().ConfigureApiBehaviorOptions 的 Azure Functions 等效项是什么？如果不存在，必须采取什么方法？

我确实同意@Nate1zn，在azure函数中没有这样的选项，但您可以验证并创建自定义响应，如下所示：

using System.ComponentModel.DataAnnotations;
using System.Net;
using Microsoft.Azure.Functions.Worker;
using Microsoft.Azure.Functions.Worker.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;

namespace FunctionApp111
{
    public class Function1
    {
        private readonly ILogger _logger;

        public Function1(ILoggerFactory loggerFactory)
        {
            _logger = loggerFactory.CreateLogger<Function1>();
        }

        [Function("Function1")]
        public async Task<HttpResponseData> RunAsync([HttpTrigger(AuthorizationLevel.Function, "get", "post")] HttpRequestData req)
        {

            if (req.Body == null || req.Body.Length == 0)
            {
                var response = req.CreateResponse(HttpStatusCode.BadRequest);
                response.WriteString("Hello Rithwik, Request body is required !!!");
                return response;
            }

            string rithrequest = await new StreamReader(req.Body).ReadToEndAsync();
            RithwikModel con = JsonConvert.DeserializeObject<RithwikModel>(rithrequest);
            var rithresults = new List<ValidationResult>();
            var context = new ValidationContext(con, null, null);

            if (!Validator.TryValidateObject(con, context, rithresults, true))
            {
                ;
                var response1 = req.CreateResponse(HttpStatusCode.NotFound);
                var ritherror = new { ErrorField = "queryParameter", StatusCode = 400, ErrorDescription = rithresults };
                var x = JsonConvert.SerializeObject(ritherror); 
                response1.WriteString(x);
                return response1;
            }

            _logger.LogInformation("C# HTTP trigger function processed a request.");
            var response2 = req.CreateResponse(HttpStatusCode.OK);
            response2.Headers.Add("Content-Type", "text/plain; charset=utf-8");
            response2.WriteString("Welcome to Azure Functions!");
            return response2;
        }
    }
    public class RithwikModel
    {
        [Required(ErrorMessage = "Parameter Id is required")]
        public string Id { get; set; }

    }
}

Output:

如果身体不正确：

如果给出正确的参数：