ASP.NET Core Web API DELETE调用返回405

如何解决ASP.NET Core Web API DELETE调用返回405

当我尝试执行DELETE调用时，我的asp.net核心Web API返回405。当API在我的本地计算机上运行时，我可以成功发送删除调用。

在IIS中，该站点的“处理程序映射”下，WEbDAV将DELETE列为要处理的动词之一： IIS WebDAV settings

web.config也将DELETE列为指定动词

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <handlers>
        <add name="aspNetCore" path="*" verb="GET,POST,PATCH,DELETE" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath=".\ServiceCatalog.API.exe" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" hostingModel="inprocess" />
    </system.webServer>
  </location>
</configuration>

从本地计算机进行测试时，删除终结点可以工作，但是一旦部署，我会收到405返回消息。

如果有帮助的话，这里是API中DELETE端点的代码

[HttpDelete("{id}")]
        public ActionResult DeleteImage(int id)
        {
            Images img = new Images();
            img.Imageid = id;

            //Check that the recrod exists to be deleted. IF not return NotFound status
            var imgCheck = _context.Images.Any(i => i.Imageid == img.Imageid);
            if (!imgCheck)
            {
                return NotFound("No record found to delete.");
            }

            //delete selected image record
            _context.Remove(img);
            _context.SaveChanges();

            // Return the id of the deleted record   
            return Ok("Image Id " + img.Imageid + " has been successfully deleted.");         

        }

API的ConfigureServices代码

// Cors Configuration
            services.AddCors(o =>
            {
                o.AddPolicy(CorsPolicy,builder => builder
                    .WithOrigins("http://xxxweb011","http://xxxweb011.x.com")
                    .AllowAnyHeader()
                    .AllowAnyMethod());
            });

            
            services.AddMvc(o =>
            {
                o.ReturnHttpNotAcceptable = true;
            });


            // Connection string from environmental variables
            var connectionString = Configuration["connectionString:101stg"];
            // Connection to SQL
            services.AddDbContext<ServiceCatalogContext>(option => option.UseSqlServer(connectionString));


            services.AddControllers()
                    .AddNewtonsoftJson();


            services.AddOData();

            services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());

配置代码

public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
        {

            /*
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler(appBuilder =>
                {
                    appBuilder.Run(async context =>
                    {
                        context.Response.StatusCode = 500;
                        await context.Response.WriteAsync("An unexpected fault happened. Try again later.");
                    });
                });
            
            app.UseDeveloperExceptionPage();
        }
            */
            app.UseDeveloperExceptionPage();    //Keeping always shown during development

            app.UseRouting();


            //added for screenshot uplaod
            app.UseStaticFiles();
            
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.EnableDependencyInjection();
                endpoints.Select()
                            .OrderBy()
                            .Filter()
                            .SkipToken()
                            .MaxTop(100)
                            .Expand()
                            .Count();
                endpoints.MapODataRoute("api","api",GetEdmModel());
            });
 
            app.UseCors(CorsPolicy);
            app.UseStatusCodePages();
            
        }

解决方法

尝试禁用/修改IIS中的所有WebDAV设置后，我发现对我来说唯一的解决方案最终是注释掉applicationHost.config文件中的以下代码行

<add name="WebDAVModule" />

为了安全起见，我也注释了以下一行

<add name="WebDAV" path="*" verb="PROPFIND,PROPPATCH,MKCOL,PUT,COPY,DELETE,MOVE,LOCK,UNLOCK" modules="WebDAVModule" resourceType="Unspecified" requireAccess="None" />