/// <summary>
/// Calculates an MD5 hash of a blob. Comparing to <see cref="Blob.MD5"/> field, it always returns
/// a hash, even if the underlying storage doesn't support it natively.
/// </summary>
public static async Task<string> GetMD5HashAsync(this IBlobStorage blobStorage, Blob blob, CancellationToken cancellationToken = default)
{
if(blob == null)
throw new ArgumentNullException(nameof(blob));
if(blob.MD5 != null)
return blob.MD5;
blob = await blobStorage.GetBlobAsync(blob.FullPath, cancellationToken).ConfigureAwait(false);
if(blob.MD5 != null)
return blob.MD5;
//hash definitely not supported, calculate it manually
using(Stream s = await blobStorage.OpenReadAsync(blob.FullPath, cancellationToken).ConfigureAwait(false))
{
if(s == null)
return null;
string hash = s.GetHash(HashType.Md5);
return hash;
}
}
private async Task LoadFullBlobAsync()
{
if (_blob == null || _blobStorage == null)
{
return;
}
IsLoading = true;
EditableMetadata.Clear();
try
{
FullBlob = await _blobStorage.GetBlobAsync(_blob);
if (FullBlob != null)
{
EditableMetadata.AddRange(FullBlob.Metadata.Select(p => new EditableKeyValue {
Key = p.Key, Value = p.Value
}));
}
}
catch (Exception ex)
{
await DialogService.ShowMessageAsync("Failed to load", ex.Message);
}
finally
{
IsDirty = false;
IsLoading = false;
}
}
public async Task Save(Snapshot snapshot, CancellationToken cancellationToken = default)
{
var json = JsonConvert.SerializeObject(snapshot, JsonSettings);
await _storage.WriteTextAsync(_path.GetSnapshotPath(snapshot.Id), json, null, cancellationToken);
Blob b = await _storage.GetBlobAsync(_path.GetSnapshotPath(snapshot.Id), cancellationToken);
b.Properties["Version"] = snapshot.Version.ToString();
b.Properties["Id"] = snapshot.Id.ToString();
await _storage.SetBlobAsync(b, cancellationToken);
}
public override async ValueTask SaveAsync(WorkflowStorageContext context, string key, object?value, CancellationToken cancellationToken = default)
{
if (value == null)
{
return;
}
var path = GetFullPath(context, key);
if (value is Stream stream)
{
await _blobStorage.WriteAsync(path, stream, cancellationToken : cancellationToken);
var blob = await _blobStorage.GetBlobAsync(path, cancellationToken);
blob.Metadata["ContentType"] = "Binary";
await _blobStorage.SetBlobAsync(blob, cancellationToken);
}
else if (value is byte[] bytes)
{
await _blobStorage.WriteAsync(path, bytes, cancellationToken : cancellationToken);
var blob = await _blobStorage.GetBlobAsync(path, cancellationToken);
blob.Metadata["ContentType"] = "Binary";
await _blobStorage.SetBlobAsync(blob, cancellationToken);
}
else
{
var json = JsonConvert.SerializeObject(value, _serializerSettings);
var jsonBytes = Encoding.UTF8.GetBytes(json);
await _blobStorage.WriteAsync(path, jsonBytes, cancellationToken : cancellationToken);
var blob = await _blobStorage.GetBlobAsync(path, cancellationToken);
blob.Metadata["ContentType"] = "Json";
await _blobStorage.SetBlobAsync(blob, cancellationToken);
}
}
/// <inheritdoc/>
public async Task <IImageResolver> GetAsync(HttpContext context)
{
var path = context.Request.Path.Value;
if (!await _blobStorage.ExistsAsync(path))
{
return(await Task.FromResult <IImageResolver>(null));
}
var blob = await _blobStorage.GetBlobAsync(path);
var metadata = new ImageMetadata(blob.LastModificationTime.Value.UtcDateTime, blob.Size.Value);
return(await Task.FromResult <IImageResolver>(new StorageNetImageResolver(_blobStorage, blob, metadata)));
}
public async Task Save(IEnumerable <IEvent> events, CancellationToken cancellationToken = default)
{
List <Task> tasksStore = new List <Task>();
List <Task> tasksAttributes = new List <Task>();
List <Task> tasksPublishers = new List <Task>();
foreach (IEvent e in events)
{
var json = JsonConvert.SerializeObject(e, JsonSettings);
await _storage.WriteTextAsync(_path.GetEventPath(e.Id, e.Version), json, null, cancellationToken);
Blob blob = await _storage.GetBlobAsync(_path.GetEventPath(e.Id, e.Version), cancellationToken);
blob.Properties["Version"] = e.Version.ToString();
blob.Properties["Id"] = e.Id.ToString();
blob.Properties["Type"] = e.GetType().ToString();
await _storage.SetBlobAsync(blob, cancellationToken);
await _publisher.Publish <IEvent>(e, cancellationToken);
}
}
