ithzhang 2020-01-29
2020/01/29, ASP.NET Core 3.1, VS2019
摘要:基于ASP.NET Core 3.1 WebApi搭建后端多层网站架构【5.1-WebCore网站核心配置】
统一封装网站核心配置,注册跨域策略,实例化雪花算法,后期可扩展添加多语言支持
本章节介绍了统一封装网站核心配置,注册跨域策略,实例化雪花算法,后期可扩展添加多语言支持
在MS.WebApi
应用程序appsettings.json
中添加以下节点:
"SiteSetting": { "WorkerId": 1, //for snowflake workerid "DataCenterId": 1, //for snowflake datacenterid "LoginFailedCountLimits": 3, //the number of login failed "LoginLockedTimeout": 3 //(minutes) account locked timeout }, "Startup": { "Cors": { "AllowOrigins": "http://localhost:8080,http://localhost:8081" } }
添加完成后,如下图所示:
说明:
在MS.WebCore
类库中添加SiteSetting.cs
类:
namespace MS.WebCore { public class SiteSetting { public long WorkerId { get; set; } public long DataCenterId { get; set; } public int LoginFailedCountLimits { get; set; } public int LoginLockedTimeout { get; set; } } }
其中的字段和appsettings.json
中对应,可以使用选择性粘贴,将json粘贴为类
在MS.WebCore
类库中添加WebCoreExtensions.cs
类:
using MS.Common.IDCode; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using System; namespace MS.WebCore { public static class WebCoreExtensions { public const string MyAllowSpecificOrigins = "_myAllowSpecificOrigins"; /// <summary> /// 添加跨域策略,从appsetting中读取配置 /// </summary> /// <param name="services"></param> /// <param name="configuration"></param> /// <returns></returns> public static IServiceCollection AddCorsPolicy(this IServiceCollection services, IConfiguration configuration) { services.AddCors(options => { options.AddPolicy(MyAllowSpecificOrigins, builder => { builder .WithOrigins(configuration.GetSection("Startup:Cors:AllowOrigins").Value.Split(',')) .AllowAnyHeader() .AllowAnyMethod(); }); }); return services; } /// <summary> /// 注册WebCore服务,配置网站 /// do other things /// </summary> /// <param name="services"></param> /// <param name="configuration"></param> /// <returns></returns> public static IServiceCollection AddWebCoreService(this IServiceCollection services, IConfiguration configuration) { //绑定appsetting中的SiteSetting services.Configure<SiteSetting>(configuration.GetSection(nameof(SiteSetting))); #region 单例化雪花算法 string workIdStr = configuration.GetSection("SiteSetting:WorkerId").Value; string datacenterIdStr = configuration.GetSection("SiteSetting:DataCenterId").Value; long workId; long datacenterId; try { workId = long.Parse(workIdStr); datacenterId = long.Parse(datacenterIdStr); } catch (Exception) { throw; } IdWorker idWorker = new IdWorker(workId, datacenterId); services.AddSingleton(idWorker); #endregion return services; } } }
说明:
在MS.WebApi
应用程序Startup.cs
类中,ConfigureServices方法里添加以下代码:
//using MS.WebCore; //添加以上代码至using引用 //注册跨域策略 services.AddCorsPolicy(Configuration); //注册webcore服务(网站主要配置) services.AddWebCoreService(Configuration);
完成后代码如下图所示
至此,WebCore核心配置完成,此时网站项目已支持跨域配置,已可以通过ioc解析SiteSetting读取网站配置和IdWorker生成雪花ID
项目完成后,如下图所示