public async Task EditBlobWithMetadata()
{
string data = "hello world";
var initialMetadata = new Dictionary <string, string> {
{ "fizz", "buzz" }
};
string containerName = Randomize("sample-container");
var containerClient = new BlobContainerClient(ConnectionString, containerName);
try
{
containerClient.Create();
BlobClient blobClient = containerClient.GetBlobClient(Randomize("sample-blob"));
await blobClient.UploadAsync(BinaryData.FromString(data), new BlobUploadOptions { Metadata = initialMetadata });
#region Snippet:SampleSnippetsBlobMigration_EditBlobWithMetadata
// download blob content and metadata
BlobDownloadResult blobData = blobClient.DownloadContent();
// modify blob content
string modifiedBlobContent = blobData.Content + "FizzBuzz";
// reupload modified blob content while preserving metadata
// not adding metadata is a metadata clear
blobClient.Upload(
BinaryData.FromString(modifiedBlobContent),
new BlobUploadOptions()
{
Metadata = blobData.Details.Metadata
});
#endregion
var actualMetadata = (await blobClient.GetPropertiesAsync()).Value.Metadata;
Assert.AreEqual(initialMetadata.Count, actualMetadata.Count);
foreach (var expectedKvp in initialMetadata)
{
Assert.IsTrue(actualMetadata.TryGetValue(expectedKvp.Key, out var actualValue));
Assert.AreEqual(expectedKvp.Value, actualValue);
}
}
finally
{
await containerClient.DeleteIfExistsAsync();
}
}
public string ReadHash(string Hash, string Collection)
{
string sResult = "";
try
{
Collection = Collection.ToLower();
Collection = RemoveInvalidChars(Collection);
Hash = RemoveInvalidChars(Hash);
string sColl = Collection;
blobClient = container.GetBlobClient(sColl + "/" + Hash + ".json");
sResult = blobClient.DownloadContent().Value.Content.ToString();
}
catch { }
return(sResult);
}
public async IAsyncEnumerable <JObject> GetRawAssetsAsync(string paths)
{
foreach (var bAsset in container.GetBlobs(Azure.Storage.Blobs.Models.BlobTraits.None, Azure.Storage.Blobs.Models.BlobStates.None, "_assets"))
{
blobClient = container.GetBlobClient(bAsset.Name);
JObject jObj = new JObject();
if (paths.Contains("*") || paths.Contains(".."))
{
try
{
string jRes = blobClient.DownloadContent().Value.Content.ToString();
jObj = new JObject(jRes);
jObj = await jDB.GetFullAsync(jObj["#id"].Value <string>(), jObj["_index"].Value <int>());
}
catch { }
}
else
{
var oAsset = await jDB.ReadHashAsync(bAsset.Name.Split('/')[1], "_assets");
if (!string.IsNullOrEmpty(paths))
{
jObj = await jDB.GetRawAsync(oAsset, paths); //load only the path
}
else
{
jObj = JObject.Parse(oAsset); //if not paths, we only return the raw data
}
}
if (jObj["_hash"] == null)
{
jObj.Add(new JProperty("_hash", bAsset.Name.Split('/')[1]));
}
yield return(jObj);
}
}
/// <summary>
/// Tests a blob SAS to determine which operations it allows.
/// </summary>
/// <param name="sasUri">A string containing a URI with a SAS appended.</param>
/// <param name="blobContent">A string content content to write to the blob.</param>
static void TestBlobSAS(Uri sasUri, string blobContent)
{
//Try performing blob operations using the SAS provided.
//Return a reference to the blob using the SAS URI.
BlobClient blob = new BlobClient(sasUri);
//Create operation: Upload a blob with the specified name to the container.
//If the blob does not exist, it will be created. If it does exist, it will be overwritten.
try
{
//string blobContent = "This blob was created with a shared access signature granting write permissions to the blob. ";
blob.Upload(BinaryData.FromString(blobContent));
Console.WriteLine("Create operation succeeded for SAS " + sasUri);
Console.WriteLine();
}
catch (RequestFailedException e)
{
Console.WriteLine("Create operation failed for SAS " + sasUri);
Console.WriteLine("Additional error information: " + e.Message);
Console.WriteLine();
}
// Write operation: Add metadata to the blob
try
{
IDictionary <string, string> metadata = new Dictionary <string, string>();
metadata.Add("name", "value");
blob.SetMetadata(metadata);
Console.WriteLine("Write operation succeeded for SAS " + sasUri);
Console.WriteLine();
}
catch (RequestFailedException e)
{
Console.WriteLine("Write operation failed for SAS " + sasUri);
Console.WriteLine("Additional error information: " + e.Message);
Console.WriteLine();
}
//Read operation: Read the contents of the blob.
try
{
BlobDownloadResult download = blob.DownloadContent();
string content = download.Content.ToString();
Console.WriteLine(content);
Console.WriteLine();
Console.WriteLine("Read operation succeeded for SAS " + sasUri);
Console.WriteLine();
}
catch (RequestFailedException e)
{
Console.WriteLine("Read operation failed for SAS " + sasUri);
Console.WriteLine("Additional error information: " + e.Message);
Console.WriteLine();
}
//Delete operation: Delete the blob.
try
{
blob.Delete();
Console.WriteLine("Delete operation succeeded for SAS " + sasUri);
Console.WriteLine();
}
catch (RequestFailedException e)
{
Console.WriteLine("Delete operation failed for SAS " + sasUri);
Console.WriteLine("Additional error information: " + e.Message);
Console.WriteLine();
}
}