ok, here it is:
<%@ WebHandler Language="C#" Class="ImageHandler" %>
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Web;
using System.Text;
using System.Net;
using System.Web.Caching;
public class ImageHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
bool succesfulImage = false;
// Get the image ID from querystring, and use it to generate a cache key.
String objectID = context.Request.QueryString["ObjectID"];
//String cacheKey = context.Request.CurrentExecutionFilePath + ":" + objectID;
String cacheKey = objectID;
Byte[] imageBytes = null;
if (objectID.Substring(objectID.LastIndexOf(".")) == ".flv")
{
context.Response.ContentType = "video/x-flv";
}
else
{
context.Response.ContentType = "image/jpeg";
}
// Check if the cache contains the image.
Object cachedImageBytes = context.Cache.Get(cacheKey);
if (cachedImageBytes != null)
{
try
{
imageBytes = (Byte[])cachedImageBytes;
succesfulImage = true;
}
catch { succesfulImage = false; }
}
else
{
try
{
// Get image from uri (in ObjectID querystring),
imageBytes = RequestGetMedia(objectID);
// Store it in the cache (to be expired after 2 hours).
// do the same cache.add in the file upload section
// with the same key (i.e. the image url)
// examine the cache timespan - is 2 hrs enough??
context.Cache.Add(cacheKey, imageBytes, null,
DateTime.MaxValue, new TimeSpan(2, 0, 0),
CacheItemPriority.Normal, null);
succesfulImage = true;
}
catch { succesfulImage = false; }
}
if (succesfulImage)
{
// Send back image.
context.Response.Cache.SetCacheability(HttpCacheab ility.Public);
context.Response.BufferOutput = true;
context.Response.OutputStream.Write(imageBytes, 0, imageBytes.Length);
}
}
public bool IsReusable
{
get
{
return false;
}
}
private byte[] RequestGetMedia(string TheURL)
{
Uri uri = new Uri(TheURL);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
Byte[] imageBytes = null;
Encoding enc = Encoding.Default; //GetEncoding(1252); // Windows default Code Page
try
{
request.KeepAlive = false;
request.ProtocolVersion = HttpVersion.Version10;
request.Method = "GET";
request.Proxy = WebRequest.DefaultWebProxy;
//allow auto redirects from redirect headers
request.AllowAutoRedirect = true;
//maximum of 10 auto redirects
request.MaximumAutomaticRedirections = 10;
//60 second timeout for request
request.Timeout = (int)new TimeSpan(0, 0, 60).TotalMilliseconds;
//give the crawler a name.
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader readStream = new StreamReader(responseStream, enc);
imageBytes = enc.GetBytes(readStream.ReadToEnd());
responseStream.Dispose();
readStream.Dispose();
}
catch (Exception ee)
{
// page = "Fail message : " + ee.Message;
}
return imageBytes;
}
}
and to use it, just do this:
<img alt="a tooltip" src="ImageHandler.ashx?ObjectID=http://images.originaltalent.com/323cac00680947438e67f1d53bf648a5.JPG" />
or in code:
<div style="text-align: center">
<img src='<%# "ImageHandler.ashx?ObjectID=" + DataBinder.Eval(Container.DataItem,"ThumbURL") %>'
alt='' class="RotatorImage" onclick='showCallbackImage(this)' /><br />
</div>
good luck
jimi
http://www.originaltalent.com
