如何解决会话数据从一种方法接收到另一种方法 asp.net core 3
我有一个 ASP.NET Core 3.1 Web API 应用程序。我试图将字符串值存储在会话中,当从客户端调用在会话中设置字符串的方法时,它很好并存储了该值,但是当我从会话中调用另一个为空的获取字符串的方法时。请帮我修复它。
启动配置服务:
public IServiceProvider ConfigureServices(IServiceCollection services)
{
services.AdddistributedMemoryCache();
services.AddSession(options =>
{
options.Cookie.Name = "AdventureWorks.Session";
options.IdleTimeout = TimeSpan.FromMinutes(20);
options.Cookie.HttpOnly = true;
options.Cookie.IsEssential = true; // make the session cookie Essential
});
services.AddSingleton<IHttpContextAccessor,HttpContextAccessor>();
services.AddMvc();
}
public void Configure(IApplicationBuilder app,ILoggerFactory loggerFactory)
{
app.UseAbp(options => { options.UseAbpRequestLocalization = false; });
app.UseCors(_defaultCorsPolicyName); // Enable CORS!
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAbpRequestLocalization();
app.UseSession();
app.UseEndpoints();
}
设置字符串的方法:
public async Task<FileStreamResult> GetCaptchaimage()
{
Captcha.Captcha captcha = new Captcha.Captcha();
int width = 100;
int height = 36;
var captchaCode = captcha.GenerateCaptchaCode();
var result = captcha.GenerateCaptchaimage(width,height,captchaCode);
_httpContextAccessor.HttpContext.Session.SetString("CaptchaCode",result.CaptchaCode);
Stream s = new MemoryStream(result.CaptchaByteData);
return new FileStreamResult(s,"image/png");
}
GetString 的方法:
public bool ValidateCaptchaCode(string userInputCaptcha)
{
var captchaValueInSession = _httpContextAccessor.HttpContext..GetString("CaptchaCode");
var isValid = userInputCaptcha == captchaValueInSession;
_httpContextAccessor.HttpContext.Session.Remove("CaptchaCode");
return isValid;
}
是否为 NULL
var captchaValueInSession = _httpContextAccessor.HttpContext.Session.GetString("CaptchaCode");
解决方法
也可以在前端验证验证码,而不是在`api
string rr = HttpContext.Session.GetString("CaptchaCode");
if (model.captchacode != rr)
{
ModelState.AddModelError(string.Empty,"Enter Valid Captcha");
}
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