显示远程网站上的图片

采用读取文件流的方式，显示远程网站上的图片，用于解决远程网站为HTTPS地址且证书无效的情况。

图片流获取：

 1 <%@ WebHandler Language="C#" Class="ImageView" %>
 2 
 3 using System.Drawing;
 4 using System.IO;
 5 using System.Net;
 6 using System.Web;
 7 
 8 public class ImageView : IHttpHandler
 9 {
10     public void ProcessRequest(HttpContext context)
11     {
12         string url = context.Server.UrlDecode(context.Request.QueryString["url"]);
13         if (!string.IsNullOrEmpty(url))
14         {
15             WebRequest request = WebRequest.Create(url);
16             Stream stream = request.GetResponse().GetResponseStream();
17             if (stream != null)
18             {
19                 var image = new Bitmap(stream);
20                 var ms = new MemoryStream();
21                 image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
22 
23                 context.Response.ContentType = "image/jpeg";
24                 context.Response.BinaryWrite(ms.ToArray());
25                 context.Response.End();
26             }
27         }
28     }
29 
30     public bool IsReusable
31     {
32         get
33         {
34             return false;
35         }
36     }
37 }

图片显示：

 1 <!DOCTYPE html>
 2 <html xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4     <title>显示远程网站上的图片</title>
 5     <script>
 6         window.onload = function () {
 7             var imageUrl = encodeURI("http://www.baidu.com/img/baidu_jgylogo3.gif");
 8             document.getElementById("image").src = "ImageView.ashx?url=" + imageUrl;
 9         };
10     </script>
11 </head>
12 <body>
13     <img id="image" alt="远程图片" src="#" />
14 </body>
15 </html>