Question

当我尝试使用$ .getJSON调用我的Web API控制器方法时，我遇到了一个令人沮丧的问题：它总是最终在控制台中显示以下消息：“无法加载资源：服务器回复状态为405（方法不允许）“

这是我的控制器：

using MyProject.Domain;
using MyProject.WebApp.Session;
using System;
using System.Linq;
using System.Web.Mvc;

namespace MyProject.WebApp.ApiControllers.Favorites
{
    public class FavoriteArticlesController : BaseController<FavoriteArticle, Guid>
    {
        [HttpGet]
        public object SetFavorite(Guid articleId, bool isFavorite)
        {
            try
            {
                if (isFavorite)
                {
                    var favorite = new FavoriteArticle
                    {
                        UserId = UserInfo.GetUserId(),
                        ArticleId = articleId
                    };
                    _repo.Upsert(favorite);
                }
                else
                {
                    var favorite = _repo.GetAll()
                        .First(fa => fa.ArticleId.CompareTo(articleId) == 0);
                    _repo.Delete(favorite.Id);
                }
                _repo.Commit();
                return new { Success = true, Error = (string)null };
            }
            catch (Exception ex)
            {
                return new { Success = false, Error = ex.Message };
            }
        }
    }
}

如果以任何方式相关，BaseController自然派生自ApiController。如果需要，这是代码：

using MyProject.Data.Repository;
using MyProject.Data.Services;
using MyProject.Domain;
using System.Web.Http;

namespace MyProject.WebApp.ApiControllers
{
    public class BaseController<TEntity, TKey> : ApiController
        where TEntity : class, IEntity<TKey>, new()
    {
        protected UnitOfWork _unitOfWork;
        protected Repository<TEntity, TKey> _repo;

        protected BaseController()
        {
            _unitOfWork = new UnitOfWork();
            _repo = _unitOfWork.GetRepository<TEntity, TKey>();
        }
    }
}

以下是拨打电话的其中一项功能：

$.fn.bindFavoriteArticle = function () {
    this.click(function () {
        var link = $(this);
        $.getJSON('/api/FavoriteArticles/SetFavorite', { ajax: true, articleId: link.attr('data-target-id'), isFavorite: true }, function (response) {
            if (response.Success === true) {
                link.children('i').removeClass('fa-heart-o')
                    .addClass('fa-heart');
                link.attr('data-toggle', 'unfavoriteArticle')
                    .unbind('click')
                    .bindUnfavoriteArticle();
            } else {
                // TODO : use bootstrap alert messages
                alert(response.Error);
            }
        });
    });
};

我在这里和那里看到路由配置可能是问题的根源，所以这里是RouteConfig.cs的内容：

using System.Web.Mvc;
using System.Web.Routing;

namespace MyProject.WebApp
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );

            routes.MapRoute(
                name: "ApiDefault",
                url: "api/{controller}/{action}/{id}",
                defaults: new { controller = "SubscriptionsController", action = "GetSelectList", id = UrlParameter.Optional }
            );
        }
    }
}

知道发生了什么事吗？我觉得有很多关于Web API如何工作的遗漏...

Answer 1

您正在RouteConfig而非WebApiConfig内配置api路由。

您需要WebApiConfig.cs文件夹中的App_Start文件：

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }
}

...因此您可以移除routes.MapRoute()内api/{controller}/{action}/{id}的{{1}}。

然后在RouteConfig.cs中，您可以这样称呼它：

Global.asax

有了这个，两个链接都应该适用于你的控制器样本：

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas(); // only if you have areas...

    GlobalConfiguration.Configure(WebApiConfig.Register);
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
    BundleConfig.RegisterBundles(BundleTable.Bundles);
}

您通过/api/FavoriteArticles?articleId=a7d944f7-66be-4200-9b89-26eda5173dca&isFavorite=true /api/FavoriteArticles/SetFavorite?articleId=a7d944f7-66be-4200-9b89-26eda5173dca&isFavorite=true调用它的方式是正确的，根本不需要更改它。

Answer 2

正如其他一个答案所述，代码配置了错误的路由。对于web api，配置WebApiConfig

public static class WebApiConfig {
    public static void Register(HttpConfiguration config) {
        // Web API routes

        //Enable Attribute routing is they are being used.
        config.MapHttpAttributeRoutes();

        //Convention based routes.

        //Matches GET /api/FavoriteArticles/SetFavorite
        config.Routes.MapHttpRoute(
            name: "DefaultActionApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

        //Matches GET /api/FavoriteArticles
        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }
}

确保在MVC路由之前配置它。

protected void Application_Start() {
    // Pass a delegate to the Configure method.
    GlobalConfiguration.Configure(WebApiConfig.Register);
    //...other configurations
}

关于重构控制器的一些建议要更加安静一些。尝试从操作中返回IHttpActionResult。简化了框架，使您可以更好地控制响应的返回方式。

[RoutePrefix("api/favoritearticles"]
public class FavoriteArticlesController : BaseController<FavoriteArticle, Guid> {


    [HttpPost]
    [Route("{articleId:guid}")] //Matches POST api/favoritearticles/{articleId:guid}
    public IHttpActionResult SetFavorite(Guid articleId) {            
        var favorite = new FavoriteArticle
        {
            UserId = UserInfo.GetUserId(),
            ArticleId = articleId
        };
        _repo.Upsert(favorite);
        _repo.Commit();
        return Ok(new { Success = true, Error = (string)null });
    }

    [HttpDelete]
    [Route("{articleId:guid}")] //Matches DELETE api/favoritearticles/{articleId:guid}
    public IHttpActionResult RemoveFavorite(Guid articleId) {            
        var favorite = _repo.GetAll()
            .First(fa => fa.ArticleId == articleId);

        if(favorite == null) return NotFound();

        _repo.Delete(favorite.Id);
        _repo.Commit();
        return Ok(new { Success = true, Error = (string)null });
    }
}

控制器应尽可能精确，因此即使通过注入服务进入控制器，上述应该更加精简。

错误处理是一个贯穿各领域的问题，也应该通过框架的可扩展性点来提取和处理。

Answer 3

我相信默认情况下JSON请求会阻止GET方法以避免JSON劫持。尝试将您的方法转换为POST（并更新ajax调用）或将当前函数返回到

x=rand(113,1);
y=rand(113,1);
x=sort(x, 'descend');
v=[x,y];
n_vect = [];
b_vect = [];
for i=2:113
   m=max(v(1:i-1,2));
        if v(i,2) > m == true 
            n=(v(i-1,2))
            b=(v(i-1,1))

            n_vect = [n_vect,n];
            b_vect = [b_vect,b];

        end 
end

Web API获取405错误（方法不允许）

3 个答案: