/// <summary>
/// Gets an asset file in the form of an array of bytes
/// </summary>
/// <param name="assetFileParameterMessage">Message wrapper for GetAssetFile parameters</param>
/// <returns>a StreamErrorWrapper with the relevant stream or with a code that specifies that the file is the same as the one on the client side or with error information</returns>
public StreamErrorWrapper GetAssetFile(AssetFileParameterMessage assetFileParameterMessage)
{
StreamErrorWrapper streamErrorWrapper = new StreamErrorWrapper();
// close returned stream on completion
OperationContext clientContext = OperationContext.Current;
clientContext.OperationCompleted += new EventHandler(delegate(object sender, EventArgs args)
{
if (streamErrorWrapper.ReturnStream != null)
{
streamErrorWrapper.ReturnStream.Dispose();
}
});
if (assetFileParameterMessage.SystemPassPhrase != _systemPassPhrase)
{
streamErrorWrapper.ErrorCode = "ERR:001";
streamErrorWrapper.Message = "Authentication failure";
streamErrorWrapper.ErrorSeverity = ErrorSeverity.Retriable;
streamErrorWrapper.ErrorStatus = ErrorStatus.Failure;
streamErrorWrapper.ReturnStream = new MemoryStream(new byte[0]);
return(streamErrorWrapper);
}
// _assetPath/<asset's GUID suffix>/asset filename
string assetFullPath = FileRepositoryHelper.GetAssetFullPath(assetFileParameterMessage.AssetFileName);
if (!File.Exists(assetFullPath))
{
_applicationLog.Warn(assetFullPath + " does not exist.");
streamErrorWrapper.ErrorCode = "ERR:002";
streamErrorWrapper.Message = "File not found";
streamErrorWrapper.ErrorSeverity = ErrorSeverity.Retriable; // search for asset file later
streamErrorWrapper.ErrorStatus = ErrorStatus.Failure;
streamErrorWrapper.ReturnStream = new MemoryStream(new byte[0]);
return(streamErrorWrapper);
}
string serverSideChecksum = ReadStringFromFile(Path.GetDirectoryName(assetFullPath) + "\\" + Path.GetFileNameWithoutExtension(assetFullPath) + ".chk");
if (assetFileParameterMessage.Checksum == serverSideChecksum)
{
streamErrorWrapper.ErrorStatus = ErrorStatus.ChecksumEqual;
streamErrorWrapper.ReturnStream = new MemoryStream(new byte[0]);
return(streamErrorWrapper);
}
TryReadFileWithReadLock(streamErrorWrapper, assetFullPath);
return(streamErrorWrapper);
}
public StreamErrorWrapper GetAssetFile(AssetFileParameterMessage assetFileParameterMessage)
{
return(Channel.GetAssetFile(assetFileParameterMessage));
}
