.Net ABP Framework 6：拦截或扩展新用户创建API（非注册接口）

针对你的需求，无需直接修改ABP内部API，利用ABP框架的扩展机制即可实现目标，以下是两种常用方案：

方法一：通过领域事件监听用户创建动作 #

ABP在用户创建完成后会自动发布UserCreatedEvent领域事件，我们可以通过实现事件处理器来触发邮箱确认邮件的发送逻辑：

1. 编写领域事件处理器类

public class UserCreatedEmailConfirmationHandler : IDomainEventHandler<UserCreatedEvent>
{
    private readonly IUserEmailConfirmationService _emailConfirmationService;
    private readonly IEmailSender _emailSender;
    private readonly ICurrentTenant _currentTenant;

    public UserCreatedEmailConfirmationHandler(
        IUserEmailConfirmationService emailConfirmationService,
        IEmailSender emailSender,
        ICurrentTenant currentTenant)
    {
        _emailConfirmationService = emailConfirmationService;
        _emailSender = emailSender;
        _currentTenant = currentTenant;
    }

    public async Task HandleEventAsync(UserCreatedEvent eventData)
    {
        var user = eventData.User;
        // 跳过已确认邮箱或无邮箱的用户
        if (user.EmailConfirmed || string.IsNullOrWhiteSpace(user.Email))
        {
            return;
        }

        // 生成邮箱确认令牌
        var token = await _emailConfirmationService.GenerateConfirmationTokenAsync(user);
        // 拼接Angular端的邮箱确认页面链接
        var confirmationLink = $"https://your-angular-domain/account/confirm-email?userId={user.Id}&token={Uri.EscapeDataString(token)}&tenantId={_currentTenant.Id}";

        // 发送确认邮件
        await _emailSender.SendAsync(
            to: user.Email,
            subject: "请确认你的邮箱",
            body: $"请点击以下链接完成邮箱确认：<a href=\"{confirmationLink}\">确认邮箱</a>",
            isBodyHtml: true
        );
    }
}

2. 在模块中注册事件处理器
   在你的应用模块（例如YourProjectWebModule）的ConfigureServices方法中添加注册代码：

context.Services.AddTransient<IDomainEventHandler<UserCreatedEvent>, UserCreatedEmailConfirmationHandler>();

方法二：覆盖IdentityUserAppService的创建方法 #

通过替换ABP默认的用户管理应用服务，在用户创建逻辑执行完成后追加邮件发送步骤：

1. 自定义IdentityUserAppService

public class CustomIdentityUserAppService : IdentityUserAppService
{
    private readonly IUserEmailConfirmationService _emailConfirmationService;
    private readonly IEmailSender _emailSender;
    private readonly ICurrentTenant _currentTenant;

    public CustomIdentityUserAppService(
        IdentityUserManager userManager,
        IIdentityUserRepository userRepository,
        IIdentityRoleRepository roleRepository,
        IIdentityUserLookupService identityUserLookupService,
        IUserEmailConfirmationService emailConfirmationService,
        IEmailSender emailSender,
        ICurrentTenant currentTenant)
        : base(userManager, userRepository, roleRepository, identityUserLookupService)
    {
        _emailConfirmationService = emailConfirmationService;
        _emailSender = emailSender;
        _currentTenant = currentTenant;
    }

    public override async Task<IdentityUserDto> CreateAsync(IdentityUserCreateDto input)
    {
        // 执行原有的用户创建逻辑
        var userDto = await base.CreateAsync(input);
        var user = await UserRepository.GetAsync(userDto.Id);

        if (!user.EmailConfirmed && !string.IsNullOrWhiteSpace(user.Email))
        {
            // 生成确认令牌并发送邮件
            var token = await _emailConfirmationService.GenerateConfirmationTokenAsync(user);
            var confirmationLink = $"https://your-angular-domain/account/confirm-email?userId={user.Id}&token={Uri.EscapeDataString(token)}&tenantId={_currentTenant.Id}";

            await _emailSender.SendAsync(
                to: user.Email,
                subject: "请确认你的邮箱",
                body: $"请点击以下链接完成邮箱确认：<a href=\"{confirmationLink}\">确认邮箱</a>",
                isBodyHtml: true
            );
        }

        return userDto;
    }
}

2. 替换默认服务
   在应用模块的ConfigureServices方法中，替换原有的IdentityUserAppService：

context.Services.Replace(ServiceDescriptor.Transient<IIdentityUserAppService, CustomIdentityUserAppService>());

关键注意事项 #

• 确保已在appsettings.json中正确配置SMTP服务参数，示例如下：

"Settings": {
  "Abp.Mailing": {
    "Smtp": {
      "Host": "smtp.your-domain.com",
      "Port": 587,
      "UserName": "your-account@your-domain.com",
      "Password": "your-password",
      "EnableSsl": true
    }
  }
}

• 将代码中的https://your-angular-domain替换为实际的Angular应用域名，同时确保前端确认页面能正确接收userId、token参数，并调用ABP的邮箱确认API完成验证。

内容的提问来源于stack exchange，提问作者Jerry