How can I get the bytes of a GetObjectResponse from S3?

Question

I'm retrieving a file from Amazon S3. I want to convert the file to bytes so that I can download it as follows:

var download = new FileContentResult(bytes, "application/pdf");
download.FileDownloadName = filename;
return download;

I have the file here:

var client = Amazon.AWSClientFactory.CreateAmazonS3Client(
        accessKey,
        secretKey,
        config
        );
GetObjectRequest request = new GetObjectRequest();
GetObjectResponse response = client.GetObject(request);          

I know about response.WriteResponseStreamToFile() but I want to download the file to the regular downloads folder. If I convert the GetObjectResponse to bytes, I can return the file. How can I do this?

Answer 1

Here's the solution I found for anyone else who needs it:

GetObjectResponse response = client.GetObject(request);
using (Stream responseStream = response.ResponseStream)
{
    var bytes = ReadStream(responseStream);
    var download = new FileContentResult(bytes, "application/pdf");
    download.FileDownloadName = filename;
    return download;
}

---

public static byte[] ReadStream(Stream responseStream)
{
    byte[] buffer = new byte[16 * 1024];
    using (MemoryStream ms = new MemoryStream())
    {
        int read;
        while ((read = responseStream.Read(buffer, 0, buffer.Length)) > 0)
        {
            ms.Write(buffer, 0, read);
        }
        return ms.ToArray();
    }
}