public override async Task InvokeAsync(HttpContext context)
{
VCodeResponseModel responseModel = await _service.VCode();
string responseJsonStr = _jsonHelper.Serialize(responseModel);
context.Response.ContentType = "application/json";
await context.Response.WriteAsync(responseJsonStr, Encoding.UTF8);
// Response.Write 开始, 不要再 Call next
// Call the next delegate/middleware in the pipeline
//await _next(context);
}
/// <summary>
/// 响应验证码,用户会话唯一标识
/// </summary>
/// <returns></returns>
public Task <VCodeResponseModel> VCode()
{
VCodeResponseModel rtnResult = new VCodeResponseModel();
try
{
VCodeImgModel model = CreateVCodeImg();
string userId = Guid.NewGuid().ToString();
rtnResult.code = 0;
rtnResult.message = "获取验证码成功";
rtnResult.data = new VCodeResponseModel.DataModel
{
userId = userId,
vCodeImg = model.ImgBase64,
vCodeTip = model.VCodeTip,
words = model.Words
};
// 生成 vCodeKey: 转为json字符串 -> AES加密
string vCodekeyJsonStr = JsonHelper.Serialize(new VCodeKeyModel
{
ErrorNum = 0,
TS = DateTimeHelper.NowTimeStamp13(),
VCodePos = model.VCodePos
});
string vCodeKey = _encryptHelper.Encrypt(vCodekeyJsonStr, _options.EncryptKey);
// 答案 保存到 此次用户会话对应的 Cache 中
_cacheHelper.Insert <string>(CachePrefixVCodeKey + userId, vCodeKey);
}
catch (Exception ex)
{
rtnResult.code = -1;
rtnResult.message = "获取验证码失败";
_logHelper?.Write(ex.ToString());
}
// TODO: 在.net framework 4.0下未测试
// Task 参考: https://www.cnblogs.com/yaopengfei/p/8183530.html
#if NETFULL40
return(Task.Factory.StartNew(() => { return rtnResult; }));
#else
return(Task.FromResult(rtnResult));
#endif
}
public async Task <IActionResult> VCodeImg()
{
VCodeResponseModel rtnResult = await _service.VCode();
return(Ok(rtnResult));
}
