public async Task <FileContentResult> GenerateCaptcha(string name, CaptchaType?t, int?tid)
{
if (!t.HasValue ||
t.Value == CaptchaType.Defulat ||
name.IsNullOrWhiteSpace())
{
return(null);
}
var captchaConfig = await SettingManager.GetCaptchaConfig(t.Value, tid);
if (!captchaConfig.Enabled)
{
return(null);
}
var imgStream = _vierificationCodeService.Create(out string code, (ValidateCodeType)captchaConfig.Type, captchaConfig.Length);
// 分租户获取缓存
var cacheKey = CaptchaHelper.CreateCacheKey(t.Value, tid);
var cache = _cacheManager.GetCache(cacheKey);
// 存值,过期时间3分钟
await cache.SetAsync(name, code.ToLower(), null, TimeSpan.FromMinutes(3));
//
Response.Body.Dispose();
return(File(imgStream.ToArray(), MimeTypeNames.ImagePng));
}
/// <summary>
/// 检查图形验证码功能
/// </summary>
/// <param name="type">图形验证码的类型</param>
/// <param name="code">待验证的code</param>
protected async Task <bool> VerifyImgCodeAsync(CaptchaType type, string code)
{
if (string.IsNullOrWhiteSpace(code))
{
throw new UserFriendlyException("验证码不能为空!");
}
//租户Id
var tenantId = AbpSession.TenantId;
// 分租户获取缓存
var cacheKey = CaptchaHelper.CreateCacheKey(type, tenantId);
//图形验证码缓存管理器
var captchaCacheManager = CacheManager.GetCache(cacheKey);
var sessionId = HttpContext.Request.Cookies[cacheKey];
//获取缓存中的值
var cacheCode = await captchaCacheManager.GetOrDefaultAsync(sessionId);
if (cacheCode != null && code == cacheCode.ToString())
{
await captchaCacheManager.RemoveAsync(sessionId);
return(true);
}
await captchaCacheManager.RemoveAsync(sessionId);
throw new UserFriendlyException("验证码错误!");
}
