public static async Task Run(
[EventGridTrigger] EventGridEvent eventGridEvent,
[Blob("{data.url}", FileAccess.Read)] Stream input,
ILogger log)
{
try
{
if (input != null)
{
var createdEvent = ((JObject)eventGridEvent.Data).ToObject <StorageBlobCreatedEventData>();
var extension = Path.GetExtension(createdEvent.Url);
var encoder = SupportFuncs.GetEncoder(extension);
if (encoder != null)
{
Task <string> storeImgInfoTask = SupportFuncs.StoreImgInfo(createdEvent.Url, input);
await storeImgInfoTask;
if (storeImgInfoTask.Result == "")
{
log.LogInformation($"Something went wrong trying to create ImgInfo.");
}
}
else
{
log.LogInformation($"No encoder support for: {createdEvent.Url}");
}
}
}
catch (Exception ex)
{
log.LogInformation(ex.Message);
throw;
}
}
public static async Task Run(
[EventGridTrigger] EventGridEvent eventGridEvent,
[Blob("{data.url}", FileAccess.Read)] Stream input,
ILogger log)
{
try
{
if (input != null)
{
var createdEvent = ((JObject)eventGridEvent.Data).ToObject <StorageBlobCreatedEventData>();
var extension = Path.GetExtension(createdEvent.Url);
var encoder = SupportFuncs.GetEncoder(extension);
if (encoder != null)
{
var thumbnailWidth = Convert.ToInt32(Environment.GetEnvironmentVariable("THUMBNAIL_WIDTH"));
var thumbContainerName = Environment.GetEnvironmentVariable("THUMBNAIL_CONTAINER_NAME");
var storageAccount = CloudStorageAccount.Parse(BLOB_STORAGE_CONNECTION_STRING);
var blobClient = storageAccount.CreateCloudBlobClient();
var container = blobClient.GetContainerReference(thumbContainerName);
var blobName = SupportFuncs.GetBlobNameFromUrl(createdEvent.Url);
var blockBlob = container.GetBlockBlobReference(blobName);
using (var output = new MemoryStream())
using (Image <Rgba32> image = Image.Load(input))
{
var divisor = image.Width / thumbnailWidth;
var height = Convert.ToInt32(Math.Round((decimal)(image.Height / divisor)));
image.Mutate(x => x.Resize(thumbnailWidth, height));
image.Save(output, encoder);
output.Position = 0;
await blockBlob.UploadFromStreamAsync(output);
}
}
else
{
log.LogInformation($"No encoder support for: {createdEvent.Url}");
}
}
}
catch (Exception ex)
{
log.LogInformation(ex.Message);
throw;
}
}
public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string imgname = req.Query["imgname"];
string output = "";
string connectionString = Environment.GetEnvironmentVariable("AzureWebJobsStorage");
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(connectionString);
CloudBlobClient blobClient = cloudStorageAccount.CreateCloudBlobClient();
string containerName = Environment.GetEnvironmentVariable("IMGINFO_CONTAINER_NAME");
CloudBlobContainer container = blobClient.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(imgname);
Task <bool> existsTask = blob.ExistsAsync();
existsTask.Wait();
if (existsTask.Result)
{
using (MemoryStream stream = new MemoryStream())
{
await blob.DownloadToStreamAsync(stream);
stream.Position = 0;
StreamReader reader = new StreamReader(stream);
output = reader.ReadToEnd();
}
}
else
{
//Generate info for image, if possible.
string imgContainerName = Environment.GetEnvironmentVariable("IMAGES_CONTAINER_NAME");
CloudBlobContainer imgContainer = blobClient.GetContainerReference(imgContainerName);
CloudBlockBlob imgBlob = imgContainer.GetBlockBlobReference(imgname);
if (await imgBlob.ExistsAsync())
{
var input = new MemoryStream();
await imgBlob.DownloadToStreamAsync(input);
input.Position = 0;
string res = await SupportFuncs.StoreImgInfo(imgBlob.Uri.ToString(), input);
if (res == "")
{
output = "no info for image (tried to create it but failed)";
}
else
{
output = res;
}
}
else
{
output = "no info for image";
}
}
return
(output != null
? (ActionResult) new OkObjectResult(output)
: new BadRequestObjectResult("Please pass a name on the query string or in the request body")
);
}