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POStoring image in cache
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  1. POStoring image in cache
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    copied!<p>I have a image handler but it keeps throwing errors</p> <p>I don't know if I am inserting the image wrongly into the cache or retrieveing it the wrong way. I keep getting buffer null if I try to use the stream.</p> <p>any ideas?</p> <pre><code>public void ProcessRequest(HttpContext context) { _imageController = new ImageController(); //Use ImageUrl to request image from external site string imageUrl = CastAide.AsString(context.Request["imageUrl"], String.Empty); //Use imageGuid and pageid to get image from user response upload string imageGuid = CastAide.AsString(context.Request["image"], String.Empty); int pageId = CastAide.AsInt32(context.Request["pageId"], -1); string subFolder = CastAide.AsString(context.Request["sub"], String.Empty); //Use ImageVaultId to return an imageVault Image int imageVaultId = CastAide.AsInt32(context.Request["imageVaultId"], 0); //Width and height determine the image size rendered int width = CastAide.AsInt32(context.Request["width"], 200); int height = CastAide.AsInt32(context.Request["height"], 200); bool resizeNoCrop = CastAide.AsBoolean(context.Request["resizeonly"], false); string cacheKey = ""; Bitmap image = null; // Generate cache key if (!String.IsNullOrEmpty(imageGuid)) cacheKey = String.Format("{0}_{1}", imageGuid, "guid"); else if (!String.IsNullOrEmpty(imageUrl)) cacheKey = String.Format("{0}_{1}", imageUrl, "url"); else if (imageVaultId &gt; 0) cacheKey = String.Format("{0}_{1}", imageVaultId, "vault"); // Load from cache if (context.Cache[cacheKey] != null) { // Load from cache //MemoryStream ms = new MemoryStream((byte[])context.Cache[cacheKey]); //image = (Bitmap)Bitmap.FromStream(ms); image = context.Cache[cacheKey] as Bitmap; } else { if (!String.IsNullOrEmpty(imageGuid)) { // load file from the local file store FileInfo fi; if (!String.IsNullOrEmpty(subFolder)) fi = new FileInfo(_imageController.GetFilePath(subFolder, imageGuid)); else fi = new FileInfo(_imageController.GetFilePath(pageId, imageGuid)); if (fi.Exists) image = (Bitmap) Bitmap.FromFile(fi.FullName); else image = (Bitmap) Bitmap.FromFile(ConfigurationManager.AppSettings["ImageNotFoundPath"]); } else if (!String.IsNullOrEmpty(imageUrl)) { // load file from the internet try { HttpWebRequest request = (HttpWebRequest) WebRequest.Create(imageUrl); WebResponse response = request.GetResponse(); Stream stream = response.GetResponseStream(); image = (Bitmap) Bitmap.FromStream(stream); response.Close(); } catch { image = (Bitmap) Bitmap.FromFile(ConfigurationManager.AppSettings["ImageNotFoundPath"]); } } else if (imageVaultId &gt; 0) { string filePath = ImageVaultUtility.GetSourceFileName(imageVaultId); FileInfo fi = new FileInfo(filePath); if (fi.Exists) image = (Bitmap) Bitmap.FromFile(fi.FullName); else image = (Bitmap) Bitmap.FromFile(ConfigurationManager.AppSettings["ImageNotFoundPath"]); } // Insert image into cache context.Cache.Insert(cacheKey, image, null, DateTime.Now.AddSeconds(10), Cache.NoSlidingExpiration, CacheItemPriority.Normal, null); } if (resizeNoCrop) ImageUtility.ApplyResizeTransform(ref image, width, height, true); else ImageUtility.ApplyCropAndResizeTransform(ref image, width, height); context.Response.Clear(); context.Response.ContentType = "image/jpeg"; image.Save(context.Response.OutputStream, ImageFormat.Jpeg); image.Dispose(); } </code></pre> <p>when retrieving the cache the following is happening:</p> <p><img src="https://i.stack.imgur.com/Buz8f.png" alt="enter image description here"></p>
 

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