Get ImageResizer to play along with EPiServer 7.5

I don’t know about you but I use ImageResizer a lot (http://imageresizing.net/). One of the major changes in EPiServer 7.5 is the way media/images are handled and ImageResizer no longer worked for images stored in EPiServer.

In order to fix this, might maybe be other solutions, is to create a plugin to ImageResizer. This is really simple.

public class EPiServerBlobPlugin : IVirtualImageProvider, IPlugin
{
        public bool FileExists(string virtualPath, System.Collections.Specialized.NameValueCollection queryString)
        {
            EPiServerBlobImage blobImage = this.GetImage(virtualPath);

            return (blobImage != null);
        }

        public IVirtualFile GetFile(string virtualPath, System.Collections.Specialized.NameValueCollection queryString)
        {
            return this.GetImage(virtualPath);
        }

        private EPiServerBlobImage GetImage(string virtualPath)
        {
            ContentRouteHelper routeHelper = ServiceLocator.Current.GetInstance<ContentRouteHelper>();
            MediaData mediaData = routeHelper.Content as MediaData;

            if (mediaData == null)
            {
                return null;
            }

            return new EPiServerBlobImage(virtualPath, mediaData);
        }

        public IPlugin Install(global::ImageResizer.Configuration.Config config)
        {
            config.Plugins.add_plugin(this);

            return this;
        }

        public bool Uninstall(global::ImageResizer.Configuration.Config config)
        {
            config.Plugins.remove_plugin(this);

            return true;
        }
    }

    public class EPiServerBlobImage : IVirtualFile
    {
        private MediaData _mediaData;

        public EPiServerBlobImage(string virtualPath, MediaData mediaData)
        {
            this.VirtualPath = virtualPath;
            this._mediaData = mediaData;
        }

        public Stream Open()
        {
            return this._mediaData.BinaryData.OpenRead();
        }

        public string VirtualPath
        {
            get;
            private set;
        }
    }

Register the plugin in resizer config section like so:

<resizer>
    <plugins>
        <add name="ImageResizer.EPiServerBlobPlugin" />
        ...
    </plugins>
</resizer>