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Setting content type of files before uploading to azure [duplicate]

I'm using Microsoft.WindowsAzure.Storage.* library from C#.
This is how I'm uploading things to storage:
// Store in storage
CloudStorageAccount storageAccount = CloudStorageAccount.Parse("...connection string...");
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("pictures");
// Create container if it doesnt exist
container.CreateIfNotExists();
// Make available to everyone
container.SetPermissions(new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
});
// Save image
CloudBlockBlob blockBlob = container.GetBlockBlobReference("blah.jpg");
blockBlob.UploadFromByteArray(byteArrayThumbnail, 0, byteArrayThumbnail.Length);
blockBlob.Properties.ContentType = "image/jpg"; // *** NOT WORKING ***
All the things I upload to the storage are being saved with content type "application/octet-stream", even though I'm using the setter with value "image/jpg" (see the last line in my code).
So question #1: Why isn't working the ContentType setter?
And question #2: If I manually change the content type to "image/jpg", using Windows Azure management portal, and then copy the absolute URI of the file to the browser's address field, and press enter, the jpg file is downloaded instead of displayed. Isn't this mime type supposed to be displayed instead of downloaded? How do I change this?

Actually you don't have to call SetProperties method. In order to set content type while uploading the blob, just set the ContentType property before calling the upload method. So your code should be:
// Save image
CloudBlockBlob blockBlob = container.GetBlockBlobReference("blah.jpg");
blockBlob.Properties.ContentType = "image/jpg";
blockBlob.UploadFromByteArray(byteArrayThumbnail, 0, byteArrayThumbnail.Length);
and that should do the trick.

After you make any changes to Properties, you have to make a call to CloudBlockBlob.SetProperties() to actually save those changes.
Think of it as something similar to LINQ-to-Entities. You can make any changes you want to your local object, but until you call SaveChanges(), nothing is actually saved.

Using the new SDK Azure.Storage.Blobs
BlobHttpHeaders blobHttpHeaders = new BlobHttpHeaders();
blobHttpHeaders.ContentType = "image/jpg";
blobClient.SetHttpHeaders(blobHttpHeaders);

Unfortunately, none of the answers provided here is currently working for the latest SDK (12.x.+)
With the latest SDK, the content type should be set via BlobHttpHeaders.
var _blobServiceClient = new BlobServiceClient("YOURCONNECTIONSTRING");
var containerClient = _blobServiceClient.GetBlobContainerClient("YOURCONTAINERNAME");
var blob = containerClient.GetBlobClient("YOURFILE.png");
var blobHttpHeader = new BlobHttpHeaders();
blobHttpHeader.ContentType = "image/png";
var uploadedBlob = await blob.UploadAsync(YOURSTREAM, blobHttpHeader);

Obviously best to set it on create like Gaurav Mantri's answer, if you are past that point and need to update the other answers here may mess you up.
// GET blob
CloudBlobContainer container = blobClient.GetContainerReference(containerName);
CloudBlockBlob blockBlob = container.GetBlockBlobReference(fileName);
// if you don't do this you'll wipe properties you didn't mean to
await blockBlob.FetchAttributesAsync();
// SET
blockBlob.Properties.ContentType = mimetype;
// SAVE
await blockBlob.SetPropertiesAsync();

with the new version of the Azure Blob SDK this is no longer working.
this worked for me:
CloudBlockBlob blockBlob = cloudBlobContainer.GetBlockBlobReference(blobName);
blockBlob.Properties.ContentType = contentType;
await blockBlob.SetPropertiesAsync();

How can I get a BLOB and add it to my configuration?

I have a web api that uses a bunch of appSettings files to load test data.
I want to shift the location of that data to an Azure Blob.
Based on the test infrastructure, I'd like to convert the Blob into an IConfiguration object.
To accomplish this, I wanted to use the AddJsonStream onto a ConfigurationBuilder.
I created this method to go out and grab the blob and convert it to a stream:
public static Stream GetBlobAsStream(Uri blobURI)
{
var storageAccount = CloudStorageAccount.Parse(AZURE_STORAGE_CONNECTION_STRING);
var cloudBlobClient = storageAccount.CreateCloudBlobClient();
var cloudBlobContainer = cloudBlobClient.GetContainerReference(blobContainer);
var cloudBlob = cloudBlobContainer.GetBlockBlobReference(blobName);
var stream = cloudBlob.OpenRead();
return stream;
}
Now this method uses a bunch of hard coded constants - which I'd like to remove.
How can I remove the hard coding, and find the needed azure info based on the Environment in which it's being run?
Or have I programmed myself into a corner here?

You could try to create an instance of CloudBlockBlob using the Blob URI and Blob Client by doing something like:
public static Stream GetBlobAsStream(Uri blobURI)
{
var storageAccount = CloudStorageAccount.Parse(AZURE_STORAGE_CONNECTION_STRING);
var cloudBlobClient = storageAccount.CreateCloudBlobClient();
var cloudBlob = new CloudBlockBlob(blobURI, cloudBlobClient);
var stream = cloudBlob.OpenRead();
return stream;
}
or create an instance of CloudBlockBlob using the Blob URI and Storage Credentials by doing something like:
public static Stream GetBlobAsStream(Uri blobURI)
{
var storageAccount = CloudStorageAccount.Parse(AZURE_STORAGE_CONNECTION_STRING);
var cloudBlob = new CloudBlockBlob(blobURI, storageAccount.Credentials);
var stream = cloudBlob.OpenRead();
return stream;
}

Azure blob storage returns 404 with some files

I have an Azure blob storage setup with a couple of files in it. I am able to download the files into a Stream when they are small (KB sized), but when the files are a little larger (MB sized) I get a 404 error. I have manually downloaded from the portal one of the images that is returning 404 fine and have resized that image and then uploaded the smaller image back to the container and I can then grammatically download it into a stream.
Here is the code that I'm using to download the blob
private static byte[] PerformDownload(string fileName, CloudBlobContainer container)
{
var blockBlob = container.GetBlockBlobReference(fileName);
using (var memoryStream = new MemoryStream())
{
blockBlob.DownloadToStream(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
var binaryReader = new BinaryReader(memoryStream);
var bytes = binaryReader.ReadBytes((int)memoryStream.Length);
return bytes;
}
}
The container is passed into this method and as I mentioned I can download some files from the container without issue, but if you need that code I can add that as well
The container is retrieve using the standard examples that you find, but here is the code
private static CloudBlobContainer GetContainer(string containerName)
{
var storageAccount = CloudStorageAccount.Parse(ConnectionString);
var container = CreateContainerIfNeeded(storageAccount, containerName);
return container;
}
private static CloudBlobContainer CreateContainerIfNeeded(CloudStorageAccount storageAccount, string containerName)
{
var blobClient = storageAccount.CreateCloudBlobClient();
var container = blobClient.GetContainerReference(containerName);
container.CreateIfNotExists();
return container;
}
Also Case sensitivity is not the issue because the container's name is 2017-106 and the file is 4448.jpg.

I am able to download the files into a Stream when they are small (KB sized), but when the files are a little larger (MB sized) I get a 404 error.
Currently max size of a block blob is approx. 4.75 TB, storing MB-sized data in a block blob, which should not cause Azure Blob service return 404 when you access the blob. 404 error indicates that the specified blob does not exist, as Gaurav Mantri said, Blob name is case-sensitive, please make sure the filename (blob name) you provided indeed exists in your container.
Besides, If only that specific blob can not be found, but it is really existing in your container, you can create support request to report it.

Uploading .mp4 to Azure Media Service from web api C#

I have an API written in C# that is meant to recieve a file from frontend. As of now it's a byte array and i want to convert this to a .mp4 file and then send it to my azure media service with the blobstorage. I do not want to store it locally and i can't read it from disk either. What is the best approach for this?
I create my CloudBlobClient like so:
private CloudBlobClient CloudBlobClient()
{
var storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings["StorageConnection"].ConnectionString);
var blobStorage = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobStorage.GetContainerReference(Constants.VideoBlobContainer);
if (container.CreateIfNotExist())
{
var permissions = container.GetPermissions();
permissions.PublicAccess = BlobContainerPublicAccessType.Container;
container.SetPermissions(permissions);
}
return blobStorage;
}
Then I have this method that i've started
private Uri UploadToStorage(CloudBlobClient blobStorage, byte[] video, VideoSize size)
{
var uniqueBlobName = GetVideoUriAsString(VideoId, Type, size);
CloudBlockBlob blob = blobStorage.GetBlockBlobReference(uniqueBlobName);
I'm not sure how to proceede here. I have been looking around a lot on the web for approaches but all I find is example of console applications reading from disk.
Is there anyone familliar with this type of uploading to media serivces?

You're on your way there, although you should just obtain the reference to the blob from the blob container from the first method. Very rough but here you go:
public void uploadBytesToBlobWithMimeAndStorageCreds(string theFolder, string theFileName, byte[] videoBytes, string theMimeType)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings["StorageConnection"].ConnectionString);
CloudBlobClient client = storageAccount.CreateCloudBlobClient;
CloudBlobContainer container = client.GetContainerReference(theFolder);
CloudBlob blob = container.GetBlobReference(theFileName);
blob.UploadByteArray(theBytes);
blob.Properties.CacheControl = "max-age=3600, must-revalidate";
blob.Properties.ContentType = theMimeType; // e.g. "video/mp4"
blob.SetProperties();
}

How to create an empty text file inside my blob container

How to create an empty text file ( or text with some message )inside my blob container
var destBlob = blobClient.GetBlobReference(myblob);
something like
https://myxyzstorage.blob.core.windows.net/mycontainer/newfolder/newTextfile.txt

If you are using a newer version of Windows Azure Storage Client Library, you should create a container and then use it to get a blob reference with the path you’d like your blob to have within the container. To create a path similar to the one you posted:
CloudBlobContainer container = blobClient.GetContainerReference(“mycontainer”);
container.CreateIfNotExists();
CloudBlockBlob blob = container.GetBlockBlobReference("newfolder/newTextfile.txt");
blob.UploadText("any_content_you_want");

If you are using .NET standard, this code should work.
CloudBlockBlob blob = blobContainer.GetBlockBlobReference("File Name");
blob.UploadTextAsync("<<File Content here>>");

The following example from here helped me to solve this
public Uri UploadBlob(string path, string fileName, string content)
{
var cloudBlobContainer = cloudBlobClient.GetContainerReference(path);
cloudBlobContainer.CreateIfNotExist();
var blob = cloudBlobContainer.GetBlobReference(fileName);
blob.UploadText(content);
return blob.Uri;
}