/// <summary>Gets a blob from Azure Storage as just raw bytes with metadata</summary>
/// <param name="containerName">container name</param>
/// <param name="blobName">blob name</param>
/// <returns>Wrapped raw bytes with some metadata</returns>
public RawFileWrapper GetRawBlob(string containerName, string blobName)
{
RawFileWrapper results = new RawFileWrapper();
// validate input
if (String.IsNullOrWhiteSpace(containerName) || String.IsNullOrWhiteSpace(blobName))
{
return(results);
}
containerName = containerName.Trim();
blobName = blobName.Trim();
// Get a reference to a share and then create it
BlobContainerClient container = new BlobContainerClient(this.ConnectionString, containerName);
// check the container exists
Response <bool> exists = container.Exists();
if (!exists.Value)
{
return(results);
}
// set options
BlobOpenReadOptions op = new BlobOpenReadOptions(false);
// read the blob to an array
BlobClient blob = container.GetBlobClient(blobName);
using Stream stream = blob.OpenRead(op);
results.Data = new byte[stream.Length];
stream.Read(results.Data, 0, results.Data.Length);
stream.Close();
// get the properties
BlobProperties props = blob.GetProperties().Value;
if (props == null)
{
return(results);
}
results.ContentType = props.ContentType;
// get a filename
if (props.Metadata.ContainsKey("filename"))
{
results.Filename = props.Metadata["filename"].ToString();
}
else
{
results.Filename = blob.Name;
}
return(results);
}
/// <summary>Gets a blob from Azure Storage BASE64 encoded and wrapped in JSON</summary>
/// <param name="containerName">container name</param>
/// <param name="blobName">blob name</param>
/// <returns>The encoded blob with metadata</returns>
public JSONFileWrapper GetWrappedBlob(string containerName, string blobName)
{
JSONFileWrapper results = new JSONFileWrapper();
// get the blob
RawFileWrapper data = this.GetRawBlob(containerName, blobName);
// validate
if (!data.IsValid)
{
return(results);
}
// convert to BASE64
results.Data = Convert.ToBase64String(data.Data, Base64FormattingOptions.None);
// get the properties
results.ContentType = data.ContentType;
results.Filename = data.Filename;
return(results);
}
