public IActionResult VerifyCode()
{
#region 防止网页后退--禁止缓存
Response.Headers.Add("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
Response.Headers.Add("Pragma", "no-cache"); // HTTP 1.0.
Response.Headers.Add("Expires", "-1"); // Proxies.
#endregion
Random r = new Random();
string code = r.Next(10000, 100000).ToString();
SetSession(SessionSetting.AdminLoginCode, code);
VerifyCode vimg = new VerifyCode();
vimg.FontSize = 30;
var bytes = vimg.CreateImageBytes(code);
var AcceptEncodings = Request.Headers["Accept-Encoding"].ToString().Replace(" ", "").Split(',');
if (AcceptEncodings.Contains("br"))
{
Response.Headers["Content-Encoding"] = "br";
bytes = CompressionUtil.BrCompress(bytes, true);
}
else if (AcceptEncodings.Contains("gzip"))
{
Response.Headers["Content-Encoding"] = "gzip";
bytes = CompressionUtil.GzipCompress(bytes, true);
}
return(File(bytes, "image/jpg"));
}
