public virtual async Task BeforeSendAsync(string type, string receiver)
{
var exist = await CaptchaStore.FindAsync(type, receiver, CurrentTenant.Id);
if (exist == null)
{
return;
}
int expireSeconds = await SettingProvider.GetAsync(AbpCaptchaSettings.CaptchaFrequencyLimitSeconds, 60);
if (exist.CreationTime.AddSeconds(expireSeconds) > Clock.Now)//检查是否超过请求频率限制
{
throw new BusinessException(CaptchaErrorCodes.FrequencyLimit);
}
}
public virtual async Task SendAsync(string type, string receiver)
{
await BeforeSendAsync(type, receiver);
var code = await CaptchaGenerator.CreateAsync();
var receiverType = receiver.Contains("@") ? EnumReceiverType.Email : EnumReceiverType.PhoneNumber;
string expireSecondSettingName = receiverType == EnumReceiverType.Email ? AbpCaptchaSettings.EmailCaptchaExpireSeconds : AbpCaptchaSettings.SmsCaptchaExpireSeconds;
int expireSeconds = await SettingProvider.GetAsync(expireSecondSettingName, 60);
var captcha = new Captcha(type, code, receiver, receiverType, Clock.Now, expireSeconds, CurrentTenant.Id);
bool sendResult = receiverType == EnumReceiverType.Email
? await EmailCaptchaSender.SendAsync(captcha)
: await SmsCaptchaSender.SendAsync(captcha);
if (!sendResult)
{
throw new BusinessException(CaptchaErrorCodes.SendFailed);
}
await CaptchaStore.CreateAsync(captcha);
}
public virtual async Task VerifyAsync(string type, string receiver, string code)
{
var captcha = await CaptchaStore.FindAsync(type, receiver, CurrentTenant.Id);
if (captcha == null)
{
throw new BusinessException(CaptchaErrorCodes.Error);
}
if (captcha.Code != code)
{
throw new BusinessException(CaptchaErrorCodes.Error);
}
if (captcha.IsUsed)
{
throw new BusinessException(CaptchaErrorCodes.Used);
}
if (captcha.IsExpire(Clock.Now))
{
throw new BusinessException(CaptchaErrorCodes.Expired);
}
captcha.Use(Clock.Now);
await CaptchaStore.UsedAsync(captcha);
}
