使用一般处理程序.ashx

来源：互联网发布：king最新域名编辑：程序博客网时间：2024/05/20 01:38
一：访问
访问时要带后缀例如：http://localhost:15343/updateAPK.ashx
二下载文件，例如作用更新apk的后台
 public class updateAPK : IHttpHandler    {        public void ProcessRequest(HttpContext context)        {            HttpResponse Response = context.Response;            HttpRequest Request = context.Request;            System.IO.Stream iStream = null;            byte[] buffer = new Byte[10240];            int length;            long dataToRead;            try            {                //获取虚拟目录的物理路径。                string filepath = context.Server.MapPath("Content/Ship.apk");//待下载的文件路径                iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,                    System.IO.FileAccess.Read, System.IO.FileShare.Read);                Response.Clear();                dataToRead = iStream.Length;                long p = 0;                if (Request.Headers["Range"] != null)                {                    Response.StatusCode = 206;                    p = long.Parse(Request.Headers["Range"].Replace("bytes=", "").Replace("-", ""));                }                if (p != 0)                {                    Response.AddHeader("Content-Range", "bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());                }                Response.AddHeader("Content-Length", ((long)(dataToRead - p)).ToString());                Response.ContentType = "application/octet-stream";                Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(System.Text.Encoding.GetEncoding(65001).GetBytes(System.IO.Path.GetFileName("Ship.apk"))));                iStream.Position = p;                dataToRead = dataToRead - p;                while (dataToRead > 0)                {                    if (Response.IsClientConnected)                    {                        length = iStream.Read(buffer, 0, 10240);                        Response.OutputStream.Write(buffer, 0, length);                        Response.Flush();                        buffer = new Byte[10240];                        dataToRead = dataToRead - length;                    }                    else                    {                        dataToRead = -1;                    }                }            }            catch (Exception ex)            {                Response.Write("Error : " + ex.Message);            }            finally            {                if (iStream != null)                {                    iStream.Close();                }                Response.End();            }        }        public bool IsReusable        {            get            {                return false;            }        }    }
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