C#擷取遠程圖片，需要Form使用者名稱和密碼的Authorization認證

C#擷取遠程圖片，需要Form使用者名稱和密碼的Authorization認證

using System;using System.Collections.Generic;using System.Drawing;using System.IO;using System.Linq;using System.Net;using System.Text;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace Web.App_Code{    public partial class GetFlexImage : System.Web.UI.Page    {        public static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);                protected void Page_Load(object sender, EventArgs e)        {            if(Request["IMG"]==null||string.IsNullOrEmpty(Request["IMG"]))            {                return;            }            try            {                string url = (Request["IMG"]).Replace("%","%25");                HttpWebRequest WRequest;                HttpWebResponse response = null;                Uri uri = new Uri(url);                CredentialCache cc = new CredentialCache();                cc.Add(uri, "Basic", new NetworkCredential("epapi", "密碼"));                WRequest = (HttpWebRequest)HttpWebRequest.Create(uri);                WRequest.Credentials = cc;                WRequest.PreAuthenticate = true;                WRequest.Method = "POST";                WRequest.AllowWriteStreamBuffering = false;                WRequest.SendChunked = false;                WRequest.KeepAlive = true;                WRequest.ContentLength = 0;                //WRequest.SendChunked = true;                //WRequest.ContentLength = 100000;                WRequest.Timeout = 30000;                WRequest.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes("epapi:epapiadmin")));                try                {                    response = (HttpWebResponse)WRequest.GetResponse();                }                catch (WebException er)                {                    response = (HttpWebResponse)er.Response;                }                Bitmap myImage = new Bitmap(response.GetResponseStream());                MemoryStream ms = new MemoryStream();                myImage.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);                Response.ClearContent();                Response.ContentType = "image/gif";                log.Debug("圖片載入：" + (Request["IMG"]));                Response.BinaryWrite(ms.ToArray());            }            catch(Exception err) {                log.Debug("圖片載入異常：" + Server.HtmlDecode(Request["IMG"]) + err.Message);            }        }    }}