[SOLVED] using GetObject, the memory stream returned is null while GetObjectSaveToFile returns proper file

using GetObject, the memory stream returned is null while GetObjectSaveToFile returns proper file

Rackspace .NET cloudifles API, the GetObjectSaveToFile method gets the file and save it properly in the specified location, but when using GetObject method, if i save the memorystream returned, the file is filled with bunch of nulls.

var cloudFilesProvider = new CloudFilesProvider(cloudIdentity);
cloudFilesProvider.GetObjectSaveToFile(inIntStoreID.ToString(), @"C:\EnetData\Development\Sanbox\OpenStack\OpenStackConsole\testImages\", inStrFileName);

works fine. but when i try

System.IO.Stream outputStream = new System.IO.MemoryStream();
cloudFilesProvider.GetObject(inIntStoreID.ToString(), inStrFileName, outputStream);
FileStream file = new FileStream(strSrcFilePath, FileMode.Create, System.IO.FileAccess.Write);
byte[] bytes = new byte[outputStream.Length];
outputStream.Read(bytes, 0, (int)outputStream.Length);
file.Write(bytes, 0, bytes.Length);
file.Close();
outputStream.Close();

i get a file with bunch of nulls in it.

Solution

I think the secret to your problem lies in the return value of outputStream.Read - which is likely returning 0.

I would try the following code instead:

using (System.IO.Stream outputStream = new System.IO.MemoryStream())
{
    cloudFilesProvider.GetObject(inIntStoreID.ToString(), inStrFileName, outputStream);

    byte[] bytes = new byte[outputStream.Length];
    outputStream.Seek(0, SeekOrigin.Begin);

    int length = outputStream.Read(bytes, 0, bytes.Length);
    if (length < bytes.Length)
        Array.Resize(ref bytes, length);

    File.WriteAllBytes(strSrcFilePath, bytes);
}