405 方法不允许 - ASP.NET Web API

Question

我已在 Google 和 StackOverflow 上检查了 ASP.NET Web API 中不允许的 405 方法的所有答案，但没有一个解决方案有效。

1. 已检查 CORS
2. 已检查 WebDAV
3. 已检查 HTTPDelete 属性

我正在创建一个 ASP.NET Web API 并有 2 个虚拟控制器。

我可以对一个控制器而不是另一个控制器使用 HTTP Delete 方法。

价值控制者

using System.Collections.Generic;
using System.Web.Http;

namespace JobSite_WebAPI.Controllers
{
  public class ValuesController : ApiController
  {
    List<string> strings = new List<string>()
    {
        "value1", "value2","value3"
    };
    // GET api/values
    public IEnumerable<string> Get()
    {
        return  strings;
    }

    // GET api/values/5
    public string Get(int id)
    {
        return strings[id];
    }

    // DELETE api/values/5
    public void Delete(int id)
    {
        strings.RemoveAt(id);
    }
  }
}

工作细节控制器

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Web.Http;
 using DataAccess;

 namespace JobSite_WebAPI.Controllers
 {
  public class JobDetailController : ApiController
  {
    public JobDetailController()
    {
        JobSiteEntities entities = new JobSiteEntities();
        entities.Configuration.ProxyCreationEnabled = false;
    }
    public IEnumerable<JobDetail>Get()
    {
        using (JobSiteEntities entities = new JobSiteEntities())
        {
            return entities.JobDetails.ToList();
        }
    }

[HttpGet]
    public HttpResponseMessage Get(int id)
    {
        using (JobSiteEntities entities = new JobSiteEntities())
        {
            var entity = entities.JobDetails.FirstOrDefault(e => e.JOBID == id);
            if (entity != null)
            {
                return Request.CreateResponse(HttpStatusCode.OK, entity);
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, "Job With Id = " + id.ToString() + " not found");
            }
        }
    }


 [HttpGet]
    public HttpResponseMessage RetrieveJobByLocation(string locationName)
    {
        try
        {
            using (JobSiteEntities entities = new JobSiteEntities())
            {
                IEnumerable<JobDetail> jobDetails = entities.JobDetails.Where(e => e.Location.LocationName.ToLower() == locationName).ToList();

                if (jobDetails != null)
                    return Request.CreateResponse(HttpStatusCode.OK, jobDetails);
                else
                    return Request.CreateResponse(HttpStatusCode.NotFound);

            }
        }
        catch(Exception ex)
        {
            return Request.CreateResponse(HttpStatusCode.BadRequest, ex);
        }
    }

    [HttpDelete]
    public HttpResponseMessage Delete(int jobId)
    {
        try
        {
            using (JobSiteEntities entities = new JobSiteEntities())
            {
                var entity = entities.JobDetails.FirstOrDefault(e => e.JOBID == jobId);

                if (entity == null)
                {
                    return Request.CreateResponse(HttpStatusCode.NotFound, "Job Id with id " + jobId + "is not found");
                }
                else
                {
                    entities.JobDetails.Remove(entity);
                    entities.SaveChanges();
                    return Request.CreateResponse(HttpStatusCode.OK);
                }
            }
        }
        catch (Exception ex)
        {
            return Request.CreateResponse(HttpStatusCode.BadRequest, ex);
        }
    }
}

}

WebAPIConfig.cs

 var cors = new EnableCorsAttribute("*", "*", "*");
 config.EnableCors(cors);


 // Web API routes
 config.MapHttpAttributeRoutes();

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

        );
        config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/octet-stream"));

Web.Config

 <remove name="WebDAV" />
  <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
  <remove name="OPTIONSVerbHandler" />
  <remove name="TRACEVerbHandler" />
  <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />

我启用了 CORS，禁用了 WebDAV。还在我的删除方法中添加了 HTTPDelete 属性。

我面临的问题是值控制器删除方法在 Fiddler 中工作正常，但对于 JobDetails 控制器，我得到了一个不允许的 405 方法。

我能够执行 GET 和 POST 方法。我也面临与 PUT 相同的问题。

添加了来自 fiddler 的错误消息截图。 Fiddler URL Fiddler Error Message

Answer 1

它适用于ValuesController，因为基于约定的路由模板...

"api/{controller}/{id}" 

有{id}占位符，控制器符合，而JobDetailController.Delete(int jobId)不匹配路由模板，因为jobId参数名称。将这些参数参数更改为int id，以使其与约定设置的路由模板匹配。

[HttpDelete]
public HttpResponseMessage Delete(int id) {
    //...
}

否则您可以改用属性路由，因为它也通过config.MapHttpAttributeRoutes() 启用

参考：Attribute Routing in ASP.NET Web API 2

[RoutePrefix("api/JobDetail")] 
public class JobDetailController : ApiController {

    [HttpGet]
    [Route("")] //Matches GET api/jobdetail
    public IEnumerable<JobDetail> Get() {
        //...
    }

    [HttpGet]
    [Route("{id:int}")] //Matches GET api/jobdetail/1
    public HttpResponseMessage Get(int id) {
       //...
    }

    [HttpGet]
    [Route("{locationName}")] //Matches GET api/jobdetail/somewhere
    public HttpResponseMessage RetrieveJobByLocation(string locationName) {
        //...
    }

    [HttpDelete]
    [Route("{jobId:int}")] //Matches DELETE api/jobdetail/1
    public HttpResponseMessage Delete(int jobId) {
        //...
    }
}

请注意，当路由到控制器时，要么按照约定要么按照属性，而不是两者兼而有之。如果通过属性路由到一个动作，那么控制器上的所有其他动作也需要属性路由。