C#获取远程图片，需要Form用户名和密码的Authorization认证

复制代码 代码如下:

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", "密码"));

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("图片加载：" + (Request["IMG"]));

Response.BinaryWrite(ms.ToArray());

}

catch(Exception err) {

log.Debug("图片加载异常：" + Server.HtmlDecode(Request["IMG"]) + err.Message);

}

}

}

}

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