/// <summary>
/// 利用文件流下载文件
/// </summary>
/// <param name="cc"></param>
public static void down(string cc)
{
if (cc != "")
{
string path = System.Web.HttpContext.Current.Server.MapPath(cc);
System.IO.FileInfo file = new System.IO.FileInfo(path);
if (file.Exists)
{
System.Web.HttpContext.Current.Response.Clear();
System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
System.Web.HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
System.Web.HttpContext.Current.Response.Filter.Close();
System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" +cc);
System.Web.HttpContext.Current.Response.WriteFile(file.FullName);
System.Web.HttpContext.Current.Response.End();
}
else
{
System.Web.HttpContext.Current.Response.Write("文件不存在");
System.Web.HttpContext.Current.Response.End();
}
}
}
/// <summary>
/// 进行防盗链处理 ,0为下载,其余显示图片
/// </summary>
/// <param name="file"></param>
/// <param name="type"></param>
public static void down(string file, int type)
{
if (System.Web.HttpContext.Current.Request.UrlReferrer == null)
{
System.Web.HttpContext.Current.Response.ContentType = "image/gif";
System.Web.HttpContext.Current.Response.WriteFile("/images/daolian.gif");
}
else if (System.Web.HttpContext.Current.Request.UrlReferrer.ToString().IndexOf(System.Web.HttpContext.Current.Request.ServerVariables["SERVER_NAME"]) < 0)
{
System.Web.HttpContext.Current.Response.Write("2");
System.Web.HttpContext.Current.Response.ContentType = "image/gif";
System.Web.HttpContext.Current.Response.WriteFile("/images/daolian.gif");
}
else
{
if (type == 0)
{
down(file);
}
else
{
System.Web.HttpContext.Current.Response.ContentType = "image/jpeg";
System.Web.HttpContext.Current.Response.WriteFile(file);
}
}
}