public void WriteBlob( string containerName, string blobName, string localFilename, Action<long> progress )
{
if( !File.Exists(localFilename) ) {
throw new FileNotFoundException("local filename does not exist", localFilename);
}
if (ContainerExists(containerName)) {
var container = _blobStore.GetContainerReference(containerName);
var blob = container.GetBlobReference(blobName);
var md5 = string.Empty;
try {
blob.FetchAttributes();
md5 = blob.Properties.ContentMD5;
if (string.IsNullOrEmpty(md5)) {
if (blob.Metadata.AllKeys.Contains("MD5")) {
md5 = blob.Metadata["MD5"];
}
}
} catch {
}
var localMD5 = string.Empty;
using( var stream = new FileStream(localFilename, FileMode.Open, FileAccess.Read, FileShare.Read) ) {
localMD5 = MD5.Create().ComputeHash(stream).ToHexString();
}
if( !string.Equals(md5, localMD5, StringComparison.CurrentCultureIgnoreCase)) {
// different file
blob.Properties.ContentType = LookupMimeType(Path.GetExtension(localFilename));
try {
using (var stream = new ProgressStream(new FileStream(localFilename, FileMode.Open, FileAccess.Read, FileShare.Read), progress)) {
blob.UploadFromStream(stream);
if( blob.Metadata.AllKeys.Contains("MD5")) {
blob.Metadata["MD5"] = localMD5;
}
else {
blob.Metadata.Add("MD5", localMD5);
}
blob.SetMetadata();
}
}
catch (StorageException e) {
if (e.ErrorCode == StorageErrorCode.BlobAlreadyExists || e.ErrorCode == StorageErrorCode.ConditionFailed) {
throw new ApplicationException("Concurrency Violation", e);
}
throw;
}
} else {
if( progress != null ) {
progress(100);
}
}
return;
}
throw new CoAppException("Container '{0}' does not exist".format(containerName));
}
public void ReadBlob( string containerName, string blobName, string localFilename, Action<long> progress )
{
if (ContainerExists(containerName)) {
var container = _blobStore.GetContainerReference(containerName);
var blob = container.GetBlobReference(blobName);
var md5 = string.Empty;
try {
blob.FetchAttributes();
md5 = blob.Properties.ContentMD5;
if (string.IsNullOrEmpty(md5)) {
if (blob.Metadata.AllKeys.Contains("MD5")) {
md5 = blob.Metadata["MD5"];
}
}
} catch {
}
if( blob.Properties.Length == 0 ) {
throw new CoAppException("Remote blob '{0}' not found".format(blobName));
}
if( File.Exists(localFilename) ) {
var localMD5 = string.Empty;
using( var stream = new FileStream(localFilename, FileMode.Open, FileAccess.Read, FileShare.Read) ) {
localMD5 = MD5.Create().ComputeHash(stream).ToHexString();
}
if( string.Equals(localMD5, md5, StringComparison.CurrentCultureIgnoreCase)) {
if( progress != null ) {
progress(100);
}
return;
}
localFilename.TryHardToDelete();
}
try {
using( var stream = new ProgressStream( new FileStream(localFilename, FileMode.CreateNew), blob.Properties.Length , progress )) {
blob.DownloadToStream(stream);
}
// blob.dow
// blob.DownloadToFile(localFilename);
}
catch (StorageException e) {
if (e.ErrorCode == StorageErrorCode.BlobAlreadyExists || e.ErrorCode == StorageErrorCode.ConditionFailed) {
throw new ApplicationException("Concurrency Violation", e);
}
throw;
}
return;
}
throw new CoAppException("Container '{0}' does not exist".format(containerName));
}