There is no sub container(directory) in Azure blob storage. I simply use slashes in file name for having virtual sub directory.
here is example.
http://apolyonstorage.blob.core.windows.net/banners/Local/Homepage/index.html
Container Name: banners
File Name : Local/Homepage/index.html
I upload the file and access it on Azure portal but simply accessing the link fail by telling resource is not found but it is actually exist.
Why it fails when i access it on browser by link ?
What's the ACL on the blob container? For a blob to be accessible directly via URL (or in other words anonymous access, blob container's ACL should be either Blob or Public.
You can use the sample code below to change the container's ACL:
CloudStorageAccount account = new CloudStorageAccount(new StorageCredentials(StorageAccount, StorageAccountKey), true);
CloudBlobClient blobClient = account.CreateCloudBlobClient();
var container = blobClient.GetContainerReference("your-container-name");
BlobContainerPermissions permissions = new BlobContainerPermissions()
{
PublicAccess = BlobContainerPublicAccessType.Blob,//Or BlobContainerPublicAccessType.Container
};
container.SetPermissions(permissions);
Related
I need to download a file from Azure Blob storage.
But the file inside another folder. For example;
Blob Containers
---myBlobContainer
-----TestFolder1
-------TestFolder2
-----------aaa.jpeg
I want to download aaa.jpeg file. I can download it when the situation like below;
Blob Containers
---myBlobContainer
------aaa.jpeg
How can I navigate through the folders, I cant give a path to the file.
Thanks
There's no folders when using Azure Storage Account. You have a container, and all the rest is part of the blob name.
e.g.
myBlobContainer/TestFolder1/TestFolder2/aaa.jpeg
myBlobContainer is the container name
/TestFolder1/TestFolder2/aaa.jpeg
is the blob name
more info: https://learn.microsoft.com/en-us/rest/api/storageservices/naming-and-referencing-containers--blobs--and-metadata#blob-names
An easy way to double check this, just loop over all the blobs inside a container, you can confirm the 'sublevels' are part of the blob name
BlobContainerClient blobContainerClient = new BlobContainerClient(connectionString, container);
blobContainerClient.CreateIfNotExists();
Console.WriteLine("Listing blobs...");
// List all blobs in the container
var blobs = blobContainerClient.GetBlobs();
foreach (BlobItem blobItem in blobs)
{
Console.WriteLine("\t" + blobItem.Name);
}
Is there any difference between azure storage of local environment and with online storage.
We have created a Azure local storage using storage emulator. Refer the below link.
https://learn.microsoft.com/en-us/azure/storage/common/storage-use-emulator
https://medium.com/oneforall-undergrad-software-engineering/setting-up-the-azure-storage-emulator-environment-on-windows-5f20d07d3a04
But, we are unable to access the files for (read files) Azure local storage. Refer the below code.
const string accountName = "devstoreaccount1";// Provide the account name
const string key = "Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==";// Provide the account key
var storageCredentials = new StorageCredentials(accountName, key);
var cloudStorageAccount = new CloudStorageAccount(storageCredentials, true);
// Connect to the blob storage
CloudBlobClient serviceClient = cloudStorageAccount.CreateCloudBlobClient();
// Connect to the blob container
CloudBlobContainer container = serviceClient.GetContainerReference(**"container name"**);
container.SetPermissionsAsync(new
BlobContainerPermissions
{
PublicAccess =
BlobContainerPublicAccessType.Blob
});
// Connect to the blob file
CloudBlockBlob blob = container.GetBlockBlobReference("sample.txt");
blob.DownloadToFileAsync("sample.txt", System.IO.FileMode.Create);
// Get the blob file as text
string contents = blob.DownloadTextAsync().Result;
The above code works correctly for reading the files in online Azure storage. Anyone suggest how to resolve the issue in reading the files in local Azure storage.
The document explains clearly about differences between the Storage Emulator and Azure Storage.
If you would like to access the local storage, you could call this API. For more details about URI, see here.
Get http://<local-machine-address>:<port>/<account-name>/<resource-path>
I have saved pdf files in azure blob storage blob, I want to show these files on my website but when a file render on html its link should be deactivated means no one can use that link to download the file again. Is this possible in azure blob storage?
You can use the blob policy to make it:
CloudStorageAccount account = CloudStorageAccount.Parse("yourStringConnection");
CloudBlobClient serviceClient = account.CreateCloudBlobClient();
var container = serviceClient.GetContainerReference("yourContainerName");
container
.CreateIfNotExistsAsync()
.Wait();
CloudBlockBlob blob = container.GetBlockBlobReference("test/helloworld.txt");
blob.UploadTextAsync("Hello, World!").Wait();
SharedAccessBlobPolicy policy = new SharedAccessBlobPolicy();
// define the expiration time
policy.SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(1);
// define the permission
policy.Permissions = SharedAccessBlobPermissions.Read;
// create signature
string signature = blob.GetSharedAccessSignature(policy);
// get full temporary uri
Console.WriteLine(blob.Uri + signature);
If I understand correctly, you're looking for single use links to Azure Blobs. Natively this feature is not available in Azure Storage. You would need to write code to implement something like this where you would keep track of the number of times a link has been used and in case the limit exceeds, you will not process that link.
I have a WordPress on Linux App running on Azure with a MySql database.
I need to be able to upload PDF files to Azure, and then have a link in the web site that will enable users to then click the link and view the PDF.
To be more specific, the document is a monthly invoice that is created on premise and then uploaded to Azure. The user will log-in and then see a link that will allow him to view the invoice.
What I don't know is how the document should be stored. Should it be stored in the MySql database? Or in some type of storage which can be linked to? Of course, it needs to be secure.
You can use Azure blob storage to upload/store your PDF documents. Each document stored will have a link that can be then shown in your website. And also you can protect these resources and use SAS, shared key authentication mechanisms to access the resources.
Greg, Blob storage would be your best option within Azure, here's what it can do:
1 -Serving images or documents directly to a browser
2 -Storing files for distributed access
3- Streaming video and audio
4- Storing data for backup and restore, disaster recovery, and archiving
5- Storing data for analysis by an on-premises or Azure-hosted service
Any file stored within Azure Blobs would be able to be accessed through a link, ex:
https://storagesample.blob.core.windows.net/mycontainer/blob1.txt or use an alias such as http://files.mycompany.com/somecontainer/bolbs.txt
Full details can be accessed here: https://learn.microsoft.com/en-us/azure/storage/blobs/storage-dotnet-how-to-use-blobs
You can use Azure Blob Storage to store any file type.
As shown below, get the File-Name, File-Stream, MimeType and File Data for any file.
var fileName = Path.GetFileName(#"C:\ConsoleApp1\Readme.pdf");
var fileStream = new FileStream(fileName, FileMode.Create);
string mimeType = MimeMapping.MimeUtility.GetMimeMapping(fileName);
byte[] fileData = new byte[fileName.Length];
objBlobService.UploadFileToBlobAsync(fileName, fileData, mimeType);
Here's the main method to upload files to Azure Blob
private async Task<string> UploadFileToBlobAsync(string strFileName, byte[] fileData, string fileMimeType)
{
// access key will be available from Azure blob - "DefaultEndpointsProtocol=https;AccountName=XXX;AccountKey=;EndpointSuffix=core.windows.net"
CloudStorageAccount csa = CloudStorageAccount.Parse(accessKey);
CloudBlobClient cloudBlobClient = csa.CreateCloudBlobClient();
string containerName = "my-blob-container"; //Name of your Blob Container
CloudBlobContainer cbContainer = cloudBlobClient.GetContainerReference(containerName);
string fileName = this.GenerateFileName(strFileName);
if (await cbContainer.CreateIfNotExistsAsync())
{
await cbContainer.SetPermissionsAsync(new BlobContainerPermissions { PublicAccess = BlobContainerPublicAccessType.Blob });
}
if (fileName != null && fileData != null)
{
CloudBlockBlob cbb = cbContainer.GetBlockBlobReference(fileName);
cbb.Properties.ContentType = fileMimeType;
await cbb.UploadFromByteArrayAsync(fileData, 0, fileData.Length);
return cbb.Uri.AbsoluteUri;
}
return "";
}
Here's the reference URL. Make sure you install these Nuget packages.
Install-Package WindowsAzure.Storage
Install-Package MimeMapping
I'm trying to download a file from this URL:
https://renatoleite.blob.core.windows.net/mycontainer/documents/Test Document.pdf
The browser is changing the URL to this:
https://renatoleite.blob.core.windows.net/mycontainer/documents/Test%20Document.pdf
My file in the blob storage has the name: Test Document.pdf
So, when I clicks to download, the Azure say that file not exist:
The specified resource does not exist.
Probably because the browser is trying to get the file with "%20" in the name.
How I can solve this?
As far as I know, if you want to upload the file space name by using azure storage api, it will auto encoded the name(replace the space with %20) when uploading it.
You could see below example:
I uploaded the Test Document.pdf to the blob storage.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
CloudConfigurationManager.GetSetting("StorageConnectionString"));
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve a reference to a container.
CloudBlobContainer container = blobClient.GetContainerReference("brando");
// Create the container if it doesn't already exist.
container.CreateIfNotExists();
// Retrieve reference to a blob named "myblob".
CloudBlockBlob blockBlob = container.GetBlockBlobReference("Test Document.pdf");
// Create or overwrite the "myblob" blob with contents from a local file.
using (var fileStream = System.IO.File.OpenRead(#"D:\Test Document.pdf"))
{
blockBlob.UploadFromStream(fileStream);
}
Then I suggest you could use storage explorer(right click the properties to see its url) or azure portal to see its url from the blob's property.
The url like this:
You could find it replace the space with %20.