public Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
try
{
var result = new List <CodePoint>();
var valueProvider = CompositeValueProvider.CreateAsync(((ControllerBase)context.Controller).ControllerContext).Result;
var code = valueProvider.GetValue(Field).ToString();
if (string.IsNullOrEmpty(code))
{
context.ModelState.TryAddModelError(Field, "验证码为空");
}
else
{
var provider = VerificationCodeFactory.GetProvider();
var pointList = provider.Decode(code);
var checkCode = provider.Decode(context.HttpContext.Session.GetString(VerificationCodeFactory.Option.SessionKey) ?? String.Empty);
if (checkCode?.Compare(pointList) != true)
{
context.ModelState.TryAddModelError(Field, "验证失败");
}
}
}
catch
{
}
return(next());
}
private Task CheckCode(HttpContext context)
{
var code = context.Request.Form["code"].ToString();
string msg = "验证失败";
bool status = false;
try
{
var provider = VerificationCodeFactory.GetProvider();
var pointList = provider.Decode(code);
var checkCode = provider.Decode(context.Session.GetString(VerificationCodeFactory.Option.SessionKey) ?? String.Empty);
if (pointList != null && checkCode != null)
{
bool checkResult = pointList.Compare(checkCode);
if (checkResult)
{
status = true;
msg = "验证通过";
}
}
}
catch
{
}
var content = JsonConvert.SerializeObject(new { Message = msg, Status = status });
context.Response.ContentType = "application/json";
return(context.Response.WriteAsync(content));
}
private Task GetVerificationCodeImage(HttpContext context)
{
var provider = VerificationCodeFactory.GetProvider();
var model = provider.CreateImage();
string msg = string.Format(VerificationCodeFactory.Option.MessageTipFormat, string.Join(" ", model.GetWord()));
var content = JsonConvert.SerializeObject(new { Result = model.ImageBase64String, Message = msg, Count = model.GetWord().Count });
context.Session.SetString(VerificationCodeFactory.Option.SessionKey, provider.Encode(model));
context.Response.ContentType = "application/json";
return(context.Response.WriteAsync(content));
}
public static IApplicationBuilder UseVerificationCode(this IApplicationBuilder builder, Action <VerificationCodeOption> optionSet)
{
if (optionSet == null)
{
throw new Exception("VerificationCodeOption 不能为空");
}
var option = new VerificationCodeOption();
optionSet(option);
VerificationCodeFactory.InitOption(option);
return(builder.UseMiddleware <VerificationCodeMiddleware>());
}