namespace blog.core.test3._0{    public class Program    {        public static void Main(string[] args)        {            CreateHostBuilder(args).Build().Run();        }        public static IHostBuilder CreateHostBuilder(string[] args) =>            Host.CreateDefaultBuilder(args)                .ConfigureWebHostDefaults(webBuilder =>                {                    webBuilder.UseStartup<Startup>();                });    }}

    public class Startup    {        public Startup(IConfiguration configuration)        {            Configuration = configuration;        }        public IConfiguration Configuration { get; }        // This method gets called by the runtime. Use this method to add services to the container.        public void ConfigureServices(IServiceCollection services)        {            services.AddControllers();        }        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)        {            if (env.IsDevelopment())            {                app.UseDeveloperExceptionPage();            }            app.UseRouting();            app.UseAuthorization();            app.UseEndpoints(endpoints =>            {                endpoints.MapControllers();            });        }    }

 public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IBlogArticleServices _blogArticleServices)        {            #region ReuestResponseLog            if (Appsettings.app("AppSettings", "Middleware_RequestResponse", "Enabled").ObjToBool())            {                app.UseReuestResponseLog();//记录请求与返回数据             }            #endregion            #region Environment            if (env.IsDevelopment())            {                // 在开发环境中，使用异常页面，这样可以暴露错误堆栈信息，所以不要放在生产环境。                app.UseDeveloperExceptionPage();                //app.Use(async (context, next) =>                //{                //    //这里会多次调用，这里测试一下就行，不要打开注释                //    //var blogs =await _blogArticleServices.GetBlogs();                //    var processName = System.Diagnostics.Process.GetCurrentProcess().ProcessName;                //    Console.WriteLine(processName);                //    await next();                //});            }            else            {                app.UseExceptionHandler("/Error");                // 在非开发环境中，使用HTTP严格安全传输(or HSTS) 对于保护web安全是非常重要的。                // 强制实施 HTTPS 在 ASP.NET Core，配合 app.UseHttpsRedirection                //app.UseHsts();            }            #endregion            #region Swagger            app.UseSwagger();            app.UseSwaggerUI(c =>            {                //根据版本名称倒序 遍历展示                typeof(ApiVersions).GetEnumNames().OrderByDescending(e => e).ToList().ForEach(version =>                {                    c.SwaggerEndpoint($"/swagger/{version}/swagger.json", $"{ApiName} {version}");                });                // 将swagger首页，设置成我们自定义的页面，记得这个字符串的写法：解决方案名.index.html                c.IndexStream = () => GetType().GetTypeInfo().Assembly.GetManifestResourceStream("Blog.Core.index.html");//这里是配合MiniProfiler进行性能监控的，《文章：完美基于AOP的接口性能分析》，如果你不需要，可以暂时先注释掉，不影响大局。                c.RoutePrefix = ""; //路径配置，设置为空，表示直接在根域名（localhost:8001）访问该文件,注意localhost:8001/swagger是访问不到的，去launchSettings.json把launchUrl去掉，如果你想换一个路径，直接写名字即可，比如直接写c.RoutePrefix = "doc";            });            #endregion            #region MiniProfiler            app.UseMiniProfiler();            #endregion                        #region CORS            //跨域第二种方法，使用策略，详细策略信息在ConfigureService中            app.UseCors("LimitRequests");//将 CORS 中间件添加到 web 应用程序管线中, 以允许跨域请求。            #region 跨域第一种版本            //跨域第一种版本，请要ConfigureService中配置服务 services.AddCors();            //    app.UseCors(options => options.WithOrigins("http://localhost:8021").AllowAnyHeader()            //.AllowAnyMethod());              #endregion            #endregion            // 跳转https            //app.UseHttpsRedirection();            // 使用静态文件            app.UseStaticFiles();            // 使用cookie            app.UseCookiePolicy();            // 返回错误码            app.UseStatusCodePages();//把错误码返回前台，比如是404            app.UseRouting();            #region 第三步：开启认证中间件            //此授权认证方法已经放弃，请使用下边的官方验证方法。但是如果你还想传User的全局变量，还是可以继续使用中间件，第二种写法//app.UseMiddleware<JwtTokenAuth>();             //app.UseJwtTokenAuth();            //如果你想使用官方认证，必须在上边ConfigureService 中，配置JWT的认证服务 (.AddAuthentication 和 .AddJwtBearer 二者缺一不可)            app.UseAuthentication();            #endregion            app.UseAuthorization();            app.UseEndpoints(endpoints =>            {                endpoints.MapControllerRoute(                    name: "default",                    pattern: "{controller=Home}/{action=Index}/{id?}");                endpoints.MapHub<ChatHub>("/api2/chatHub");            });        }

 app.UseEndpoints(endpoints => {     endpoints.MapControllers(); });

//以下不是本系列教程，就看思路即可，不用敲代码namespace CoreBackend.Api.Controllers{    //[Route("api/product")]    [Route("api/[controller]")]    public class ProductController: Controller    {        [HttpGet]        public JsonResult GetProducts()        {            return new JsonResult(new List<Product>            {                new Product                {                    Id = 1,                    Name = "牛奶",                    Price = 2.5f                },                new Product                {                    Id = 2,                    Name = "面包",                    Price = 4.5f                }            });        }    }}

//以下不是本系列教程，就看思路即可，不用敲代码　　　　[Route("{id}", Name = "GetProduct")]        public IActionResult GetProduct(int id)        {            var product = ProductService...(x => x.Id == id);            if (product == null)            {                return NotFound();            }            return Ok(product);        }        [HttpPost]        public IActionResult Post([FromBody] ProductCreation product)        {            if (product == null)            {                return BadRequest();            }            var maxId = ProductService.Max(x => x.Id);            var newProduct = new Product            {                Id = ++maxId,                Name = product.Name,                Price = product.Price            };            ProductService.Add(newProduct);            return CreatedAtRoute("GetProduct", new { id = newProduct.Id }, newProduct);        }

//以下不是本系列教程，就看思路即可，不用敲代码using System;using System.ComponentModel.DataAnnotations;namespace CoreBackend.Api.Dtos{    public class ProductCreation    {        [Display(Name = "产品名称")]        [Required(ErrorMessage = "{0}是必填项")]        // [MinLength(2, ErrorMessage = "{0}的最小长度是{1}")]        // [MaxLength(10, ErrorMessage = "{0}的长度不可以超过{1}")]　　　　 [StringLength(10, MinimumLength = 2, ErrorMessage = "{0}的长度应该不小于{2}, 不大于{1}")]        public string Name { get; set; }        [Display(Name = "价格")]        [Range(0, Double.MaxValue, ErrorMessage = "{0}的值必须大于{1}")]        public float Price { get; set; }    }}

//以下不是本系列教程，就看思路即可，不用敲代码　　　　[HttpPost]        public IActionResult Post([FromBody] ProductCreation product)        {            if (product == null)            {                return BadRequest();            }            if (!ModelState.IsValid)            {                return BadRequest(ModelState);            }            var maxId = ProductService.Max(x => x.Id);            var newProduct = new Product            {                Id = ++maxId,                Name = product.Name,                Price = product.Price            };            ProductService.Add(newProduct);            return CreatedAtRoute("GetProduct", new { id = newProduct.Id }, newProduct);        } 

    public class ProductModification    {        [Display(Name = "产品名称")]        [Required(ErrorMessage = "{0}是必填项")]        [StringLength(10, MinimumLength = 2, ErrorMessage = "{0}的长度应该不小于{2}, 不大于{1}")]        public string Name { get; set; }        [Display(Name = "价格")]        [Range(0, Double.MaxValue, ErrorMessage = "{0}的值必须大于{1}")]        public float Price { get; set; }    }

//以下不是本系列教程，就看思路即可，不用敲代码　　　　[HttpPut("{id}")]        public IActionResult Put(int id, [FromBody] ProductModification product)        {            if (product == null)            {                return BadRequest();            }            if (product.Name == "产品")            {                ModelState.AddModelError("Name", "产品的名称不可以是'产品'二字");            }            if (!ModelState.IsValid)            {                return BadRequest(ModelState);            }            var model = ProductService.SingleOrDefault(x => x.Id == id);            if (model == null)            {                return NotFound();            }            model.Name = product.Name;            model.Price = product.Price;            // return Ok(model);            return NoContent();        }