ASP.NET 核心 2.0 中的多重身份

Question

我正在将 ASP.NET Core 1.0 应用程序迁移到 ASP.NET Core 2.0。

在我的启动中，我配置了两个身份：

services.AddIdentity<IdentityUser, IdentityRole>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddUserStore<IdentityUserStore<IdentityUser>>()
   .AddRoleStore<IdentityRoleStore<IdentityRole>>();

services.AddIdentity<Customer, CustomerRole>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddErrorDescriber<CustomerIdentityErrorDescriber>()
   .AddUserStore<CustomerStore<Customer>>()
   .AddRoleStore<CustomerRoleStore<CustomerRole>>();

这在 ASP.NET Core 1.0 中运行良好但失败并出现错误：System.InvalidOperationException: 'Scheme already exists: Identity.Application' in ASP.NET Core 2.0.

在 ASP.NET Core 2.0 中，如果我删除对 AddIdentity 的调用之一，错误就会消失。如何迁移我的代码以便我可以在我的应用程序中使用两种不同类型的身份用户和角色？还是我在 ASP.NET Core 1.0 中写这篇文章时在理解事情如何运作时犯了一个根本性错误？

Answer 1

查看 github 上的 ASP.NET 核心源代码后，可以使用此扩展方法添加第二个身份：

using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using System;
using System.Collections.Generic;
using System.Text;

namespace Whatever
{
    public static class IdentityExtensions
    {
        public static IdentityBuilder AddSecondIdentity<TUser, TRole>(
            this IServiceCollection services)
            where TUser : class
            where TRole : class
        {
            services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
            services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
            services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
            services.TryAddScoped<IRoleValidator<TRole>, RoleValidator<TRole>>();
            services.TryAddScoped<ISecurityStampValidator, SecurityStampValidator<TUser>>();
            services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser, TRole>>();
            services.TryAddScoped<UserManager<TUser>, AspNetUserManager<TUser>>();
            services.TryAddScoped<SignInManager<TUser>, SignInManager<TUser>>();
            services.TryAddScoped<RoleManager<TRole>, AspNetRoleManager<TRole>>();

            return new IdentityBuilder(typeof(TUser), typeof(TRole), services);
        }
    }
}

Answer 2

非常感谢您的回答基思。这为我节省了很多时间！一个小改进：在我的案例中，我必须配置一些选项 (IdentityOptions)。例如：密码复杂性规则。

因此，我包括了 Action setupAction 的注册。（这与 Microsoft 在 IdentityServiceCollectionExtension 中的 AddIdentity 中执行的方式相同）

public static class IdentityExtensions
{
    public static IdentityBuilder AddSecondIdentity<TUser, TRole>(
        this IServiceCollection services, Action<IdentityOptions> setupAction)
        where TUser : class
        where TRole : class
    {
        services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
        services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
        services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
        services.TryAddScoped<IRoleValidator<TRole>, RoleValidator<TRole>>();
        services.TryAddScoped<ISecurityStampValidator, SecurityStampValidator<TUser>>();
        services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser, TRole>>();
        services.TryAddScoped<UserManager<TUser>, AspNetUserManager<TUser>>();
        services.TryAddScoped<SignInManager<TUser>, SignInManager<TUser>>();
        services.TryAddScoped<RoleManager<TRole>, AspNetRoleManager<TRole>>();

        if (setupAction != null)
            services.Configure(setupAction);

        return new IdentityBuilder(typeof(TUser), typeof(TRole), services);
    }
}

Answer 3

Asp.net Core 2.2 为此目的提供了一个 built-in 方法。

AddIdentityCore<TUser>

使用方法：

services.AddIdentity<IdentityUser, IdentityRole>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddUserStore<IdentityUserStore<IdentityUser>>()
   .AddRoleStore<IdentityRoleStore<IdentityRole>>();

services.AddIdentityCore<Customer>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddErrorDescriber<CustomerIdentityErrorDescriber>()
   .AddUserStore<CustomerStore<Customer>>()
   .AddRoleStore<CustomerRoleStore<CustomerRole>>();

services.AddScoped<RoleManager<Customer>>();

其实从asp.net core 2.2 github repo

读到这个方法的实现

    /// <summary>
    /// Adds and configures the identity system for the specified User type. Role services are not added by default 
    /// but can be added with <see cref="IdentityBuilder.AddRoles{TRole}"/>.
    /// </summary>
    /// <typeparam name="TUser">The type representing a User in the system.</typeparam>
    /// <param name="services">The services available in the application.</param>
    /// <param name="setupAction">An action to configure the <see cref="IdentityOptions"/>.</param>
    /// <returns>An <see cref="IdentityBuilder"/> for creating and configuring the identity system.</returns>
    public static IdentityBuilder AddIdentityCore<TUser>(this IServiceCollection services, Action<IdentityOptions> setupAction)
        where TUser : class
    {
        // Services identity depends on
        services.AddOptions().AddLogging();

        // Services used by identity
        services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
        services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
        services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
        services.TryAddScoped<ILookupNormalizer, UpperInvariantLookupNormalizer>();
        services.TryAddScoped<IUserConfirmation<TUser>, DefaultUserConfirmation<TUser>>();
        // No interface for the error describer so we can add errors without rev'ing the interface
        services.TryAddScoped<IdentityErrorDescriber>();
        services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser>>();
        services.TryAddScoped<UserManager<TUser>>();

        if (setupAction != null)
        {
            services.Configure(setupAction);
        }

        return new IdentityBuilder(typeof(TUser), services);
    }

ASP.NET 核心 2.0 中的多重身份

Multiple Identities in ASP.NET Core 2.0

c#

asp.net-core

asp.net-core-identity