public (string, BackupRecord) GetBackupHashAndRecord(string bsname, string prefix, int offset = 0)
{
var bset = LoadBackupSet(bsname);
var match = HashByPrefix(bsname, prefix);
if (match == null || match.Value.multiplematches == true)
{
// TODO: throw this exception out of HashByPrefix?
throw new KeyNotFoundException();
}
int pidx = 0;
for (int i = 0; i < bset.Backups.Count; i++)
{
if (bset.Backups[i].hash.SequenceEqual(match.Value.singlematchhash))
{
pidx = i;
break;
}
}
int bidx = pidx + offset;
if (bidx >= 0 && bidx < bset.Backups.Count)
{
return(HashTools.ByteArrayToHexViaLookup32(bset.Backups[bidx].hash).ToLower(), GetBackupRecord(bsname, bset.Backups[bidx].hash));
}
else
{
throw new IndexOutOfRangeException();
}
}
public IEnumerable <string> GetBackupsAndMetadataReferencesAsStrings(BackupSetReference bsname)
{
var bset = LoadBackupSet(bsname);
foreach ((byte[] backupref, bool _) in bset.Backups)
{
yield return(HashTools.ByteArrayToHexViaLookup32(backupref));
foreach (byte[] reference in Dependencies.Blobs.GetAllBlobReferences(backupref,
BlobLocation.BlobType.BackupRecord, false, false))
{
yield return(HashTools.ByteArrayToHexViaLookup32(reference));
}
}
}
public Task DeleteBlobAsync(byte[] hash, string fileId)
{
return(DeleteFileAsync(Path.Combine(BlobSaveDirectory, HashTools.ByteArrayToHexViaLookup32(hash)), fileId));
}
public Task <(byte[] encryptedHash, string fileId)> StoreBlobAsync(byte[] hash, byte[] data)
{
return(StoreFileAsync(Path.Combine(BlobSaveDirectory, HashTools.ByteArrayToHexViaLookup32(hash)), hash, data));
}
public Task <byte[]> LoadBlobAsync(byte[] hash)
{
return(LoadFileAsync(Path.Combine(BlobSaveDirectory, HashTools.ByteArrayToHexViaLookup32(hash))));
}
/// <summary>
///
/// </summary>
/// <param name="file"></param>
/// <param name="hash"></param>
/// <param name="data"></param>
/// <returns>fileId</returns>
private async Task <(byte[] encryptedHash, string fileId)> StoreFileAsync(string file, byte[] hash, byte[] data, bool preventEncryption = false)
{
async Task <GetUploadUrlResponse> GetUploadUrl(int attempts = 0)
{
if (AuthResp == null)
{
AuthResp = await AuthorizeAccount();
}
Delay();
try
{
var urlresp = await AuthResp.apiUrl
.AppendPathSegment("/b2api/v1/b2_get_upload_url")
.WithHeaders(new { Authorization = AuthResp.authorizationToken })
.PostJsonAsync(new { bucketId = BucketId })
.ReceiveJson <GetUploadUrlResponse>().ConfigureAwait(false);
SuccessfulTransmission();
return(urlresp);
}
catch (FlurlHttpException ex)
{
if (ex.Call.HttpStatus != null && ex.Call.HttpStatus == System.Net.HttpStatusCode.Unauthorized)
{
AuthResp = null;
}
else
{
// Other classes of errors may be congestion related so we increase the delay
FailedTransmission();
}
if (attempts < Retries)
{
return(await GetUploadUrl(attempts + 1).ConfigureAwait(false));
}
throw;
}
}
var hashFileId = await UploadData();
async Task <(byte[] encryptedHash, string fileId)> UploadData(int attempts = 0)
{
if (UploadUrlResp == null)
{
UploadUrlResp = await GetUploadUrl();
}
Delay();
try
{
if (Encryptor != null && !preventEncryption)
{
data = Encryptor.EncryptBytes(data);
hash = HashTools.GetSHA1Hasher().ComputeHash(data);
}
var filecontent = new ByteArrayContent(data);
filecontent.Headers.Add("Content-Type", "application/octet-stream");
var uploadresp = await UploadUrlResp.uploadUrl
.WithHeaders(new
{
Authorization = UploadUrlResp.authorizationToken,
X_Bz_File_Name = file,
Content_Length = data.Length,
X_Bz_Content_Sha1 = HashTools.ByteArrayToHexViaLookup32(hash)
})
.PostAsync(filecontent)
.ReceiveJson <UploadResponse>().ConfigureAwait(false);
SuccessfulTransmission();
return(hash, uploadresp.fileId);
}
catch (FlurlHttpException ex)
{
if (ex.Call.HttpStatus != null && ex.Call.HttpStatus == System.Net.HttpStatusCode.Unauthorized)
{
UploadUrlResp = null;
}
else
{
// Other classes of errors may be congestion related so we increase the delay
FailedTransmission();
}
if (attempts < Retries)
{
return(await UploadData(attempts + 1).ConfigureAwait(false));
}
throw;
}
}
return(hashFileId);
}
/// <summary>
///
/// </summary>
/// <param name="prefix"></param>
/// <returns>Null if no matches, (true, null) for multiple matches, (false, hashstring) for exact match.</returns>
public (bool multiplematches, byte[] singlematchhash)? HashByPrefix(string bsname, string prefix)
{
var bset = LoadBackupSet(bsname);
// TODO: This implementation is pretty slow, could be improved with a better data structure like a trie or DAFSA
// also if this becomes an issue, keep a s
prefix = prefix.ToLower();
List <string> hashes = new List <string>(from backup in bset.Backups select HashTools.ByteArrayToHexViaLookup32(backup.hash));
List <string> matches = new List <string>(from h in hashes where h.ToLower().StartsWith(prefix.ToLower()) select h);
if (matches.Count == 0)
{
return(null);
}
else if (matches.Count > 1)
{
return(true, null);
}
else
{
return(false, HashTools.HexStringToByteArray(matches[0]));
}
}
public (string, BackupRecord) GetBackupHashAndRecord(string bsname, int offset = 0)
{
var bset = LoadBackupSet(bsname);
return(GetBackupHashAndRecord(bsname, HashTools.ByteArrayToHexViaLookup32(bset.Backups[bset.Backups.Count - 1].hash).ToLower(), offset));
}
