/// <summary>
/// Get a stream for writing the contents of an item
/// </summary>
/// <param name="entry">The entry representing the file to be uploaded</param>
/// <param name="length">The length of the file to be uploaded</param>
/// <returns>The <see cref="Stream"/>that the file's content can be written to</returns>
public override Stream GetWriteStreamForEntry(SyncEntry entry, long length)
{
// Create a default session. By itself, the file will be uploaded to Backblaze when the stream
// containins the session is disposed.
BackblazeB2UploadSession session = new BackblazeB2UploadSession(entry, length);
// If the file is large enough, call the method below to get the large file upload information. When
// these properties are present, the stream will upload the file's parts individually.
if (length >= this.TypedConfiguration.ConnectionInfo.RecommendedPartSize)
{
session.StartLargeFileResponse =
this.backblazeClient.StartLargeUpload(
this.TypedConfiguration.BucketId,
entry.GetRelativePath(null, "/"))
.Result;
session.GetUploadPartUrlResponse =
this.backblazeClient.GetUploadPartUrl(session.StartLargeFileResponse.FileId).Result;
// Return the stream type dedicated to uploading large files (via parts)
return(new BackblazeB2LargeUploadStream(
this,
session,
Constants.LimitPartMaximumSize,
length));
}
// The file size is below the large-file limit, so upload directly
return(new BackblazeB2UploadStream(this, session));
}
public BackblazeB2UploadStream(
BackblazeB2Adapter adapter,
BackblazeB2UploadSession session)
{
this.adapter = adapter;
this.Session = session;
this.memoryStream = new MemoryStream();
}
public BackblazeB2LargeUploadStream(
BackblazeB2Adapter adapter,
BackblazeB2UploadSession session,
long partSize,
long fileSize)
: base(partSize, fileSize)
{
this.adapter = adapter;
this.Session = session;
}
public async Task <UploadPartResponse> UploadPart(
BackblazeB2UploadSession session,
int partNumber,
string sha1Hash,
long size,
Stream contentStream)
{
return(await this.backblazeClient.UploadPart(
session.GetUploadPartUrlResponse.UploadUrl,
session.GetUploadPartUrlResponse.AuthorizationToken,
partNumber,
sha1Hash,
size,
contentStream)
.ConfigureAwait(false));
}
