/// <summary>
/// 保存一个Cookie
/// </summary>
/// <param name="CookieName">Cookie名称</param>
/// <param name="CookieValue">Cookie值</param>
/// <param name="CookieTime">Cookie过期时间(小时),0为关闭页面失效</param>
public static void SaveCookie(string CookieName, string CookieValue, double CookieTime)
{
HttpCookie myCookie = new HttpCookie(CookieName);
DateTime now = DateTime.Now;
myCookie.Value = DEncrypt.Encrypt(HttpUtility.HtmlEncode(CookieValue), "chinacloudtech");
if (CookieTime != 0)
{
//有两种方法，第一方法设置Cookie时间的话，关闭浏览器不会自动清除Cookie
//第二方法不设置Cookie时间的话，关闭浏览器会自动清除Cookie ,但是有效期
//多久还未得到证实。
myCookie.Expires = now.AddMinutes(CookieTime);
if (HttpContext.Current.Response.Cookies[CookieName] != null)
{
HttpContext.Current.Response.Cookies.Remove(CookieName);
}
HttpContext.Current.Response.Cookies.Add(myCookie);
}
else
{
if (HttpContext.Current.Response.Cookies[CookieName] != null)
{
HttpContext.Current.Response.Cookies.Remove(CookieName);
}
HttpContext.Current.Response.Cookies.Add(myCookie);
}
}
/// <summary>
/// 跨域访问
/// </summary>
/// <param name="url"></param>
/// <param name="param"></param>
/// <returns></returns>
public static string Post(string url, string param, string tokenId = "", int time = 60000)
{
Uri address = new Uri(url);
HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/json;charset=utf-8"; //"application/x-www-form-urlencoded";
request.Timeout = time;
byte[] byteData = UTF8Encoding.UTF8.GetBytes(param == null ? "" : param);
request.ContentLength = byteData.Length;
if (!string.IsNullOrEmpty(tokenId))
{
string sysId = System.Configuration.ConfigurationManager.AppSettings["SysId"];
string accessKey = System.Configuration.ConfigurationManager.AppSettings["AccessKey"];
accessKey = string.IsNullOrEmpty(accessKey) ? "" : accessKey;
request.Headers.Add("Authorization", "Basic " + DEncrypt.Encrypt(sysId + DEncrypt.Encrypt(tokenId, accessKey), ""));
}
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(byteData, 0, byteData.Length);
}
string result = "";
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(response.GetResponseStream());
result = reader.ReadToEnd();
}
return(result);
}
/// <summary>
/// 取得CookieValue
/// </summary>
/// <param name="CookieName">Cookie名称</param>
/// <returns>Cookie的值</returns>
public static string GetCookie(string CookieName)
{
HttpCookie myCookie = new HttpCookie(CookieName);
myCookie = HttpContext.Current.Request.Cookies[CookieName];
if (myCookie != null)
{
string cookievalue = DEncrypt.Decrypt(myCookie.Value, "chinacloudtech");
return(HttpUtility.HtmlDecode(cookievalue));
}
else
{
return(null);
}
}
public static byte[] GetVerifyCode()
{
int codeW = 80;
int codeH = 30;
int fontSize = 16;
string chkCode = string.Empty;
//颜色列表，用于验证码、噪线、噪点
Color[] color = { Color.Black, Color.Red, Color.Blue, Color.Green, Color.Orange, Color.Brown, Color.Brown, Color.DarkBlue };
//字体列表，用于验证码
string[] font = { "Times New Roman" };
//验证码的字符集，去掉了一些容易混淆的字符
char[] character = { '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'd', 'e', 'f', 'h', 'k', 'm', 'n', 'r', 'x', 'y', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' };
Random rnd = new Random();
//生成验证码字符串
for (int i = 0; i < 4; i++)
{
chkCode += character[rnd.Next(character.Length)];
}
//写入Session、验证码加密
var md5str = DEncrypt.Get16_Md5Lower(chkCode.ToLower(), null);
WebHelper.WriteSession("Login_VerifyCode", md5str);
//创建画布
Bitmap bmp = new Bitmap(codeW, codeH);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White);
//画噪线
for (int i = 0; i < 3; i++)
{
int x1 = rnd.Next(codeW);
int y1 = rnd.Next(codeH);
int x2 = rnd.Next(codeW);
int y2 = rnd.Next(codeH);
Color clr = color[rnd.Next(color.Length)];
g.DrawLine(new Pen(clr), x1, y1, x2, y2);
}
//画验证码字符串
for (int i = 0; i < chkCode.Length; i++)
{
string fnt = font[rnd.Next(font.Length)];
Font ft = new Font(fnt, fontSize);
Color clr = color[rnd.Next(color.Length)];
g.DrawString(chkCode[i].ToString(), ft, new SolidBrush(clr), (float)i * 18, (float)0);
}
//将验证码图片写入内存流，并将其以 "image/Png" 格式输出
MemoryStream ms = new MemoryStream();
try
{
bmp.Save(ms, ImageFormat.Png);
return(ms.ToArray());
}
catch (Exception)
{
return(null);
}
finally
{
g.Dispose();
bmp.Dispose();
}
}
