private FileViewModel ExtendFileViewModel(FileViewModel file)
{
file.IsImage = ResizerService.IsImageExtension(file.Extension);
try
{
SetFileSizes(file);
}
catch
{
}
return(file);
}
/// <summary>
/// Re-sizes a JPEG image that is stored in Blob Storage to a max width and height, maintaining aspect ratio.
/// </summary>
/// <param name="params">A JSON or XML model object that must contain uri (string), maxWidth (int) and maxHeight (int).</param>
/// <returns>The URL of the new, resized JPEG image.</returns>
/// <remarks>Original image Blob must be in the Storage Account that is configured in appSettings. Resized image will be saved
/// in to a Container named 'resized' (it will be created if it does not exist). If the resized image already exists, it will be overwritten.</remarks>
public async Task <HttpResponseMessage> ResizeInStorage(ResizeTo @params)
{
string uri = @params.Uri;
int maxWidth = @params.MaxWidth;
int maxHeight = @params.MaxHeight;
string storageAccount = System.Configuration.ConfigurationManager.AppSettings["AZURE_STORAGE_ACCOUNT"];
// checks
if (!uri.EndsWith(".jpg", StringComparison.InvariantCultureIgnoreCase))
{
return(ErrorResponse(new NotSupportedException("Only JPEG (.jpg) Images are supported.")));
}
if (string.IsNullOrEmpty(storageAccount))
{
return(ErrorResponse(new InvalidOperationException("AZURE_STORAGE_ACCOUNT was not found in AppSettings.")));
}
if (!uri.Contains(storageAccount))
{
return(ErrorResponse(new InvalidOperationException("Source Image blob must be in the Storage account configured for this API.")));
}
if (maxWidth < 0 || maxWidth > 10000)
{
return(ErrorResponse(new ArgumentOutOfRangeException("maxWidth")));
}
if (maxHeight < 0 || maxHeight > 10000)
{
return(ErrorResponse(new ArgumentOutOfRangeException("maxHeight")));
}
// download the blob
var storage = new AzureBlobStorage(System.Configuration.ConfigurationManager.AppSettings);
var blob = await storage.Download(uri);
// resize
var resizer = new ResizerService();
var newImage = resizer.Resize(blob.Stream, new System.Drawing.Size(maxWidth, maxHeight));
//TODO: smelly new filename logic
var imageUri = new Uri(uri);
var paths = imageUri.AbsolutePath.Split('/');
var newBlobName = paths[paths.Length - 1].Replace(".jpg", string.Format("_{0}.jpg", Math.Max(maxWidth, maxHeight)));
// save the blob
await storage.CreateContainer("resized");
var newUri = await storage.Upload("resized", newBlobName, "image/jpeg", newImage);
// return the new URI
return(Request.CreateResponse(HttpStatusCode.OK, new { newUri }));
}
