public static string SetRequestBodyHash(IRequest request)
{
string computedContentHash = null;
var shaHeaderPresent = request.Headers.TryGetValue(HeaderKeys.XAmzContentSha256Header, out computedContentHash);
if (shaHeaderPresent && !request.UseChunkEncoding)
return computedContentHash;
if (request.UseChunkEncoding)
{
computedContentHash = StreamingBodySha256;
if (request.Headers.ContainsKey(HeaderKeys.ContentLengthHeader))
{
// substitute the originally declared content length with the true size of
// the data we'll upload, which is inflated with chunk metadata
request.Headers[HeaderKeys.XAmzDecodedContentLengthHeader] = request.Headers[HeaderKeys.ContentLengthHeader];
var originalContentLength = long.Parse(request.Headers[HeaderKeys.ContentLengthHeader], CultureInfo.InvariantCulture);
request.Headers[HeaderKeys.ContentLengthHeader]
= ChunkedUploadWrapperStream.ComputeChunkedContentLength(originalContentLength).ToString(CultureInfo.InvariantCulture);
}
if (request.Headers.ContainsKey(HeaderKeys.ContentEncodingHeader))
{
var originalEncoding = request.Headers[HeaderKeys.ContentEncodingHeader];
if (!originalEncoding.Contains(AWSChunkedEncoding))
{
request.Headers[HeaderKeys.ContentEncodingHeader]
= string.Concat(originalEncoding, ", ", AWSChunkedEncoding);
}
}
else
request.Headers[HeaderKeys.ContentEncodingHeader] = AWSChunkedEncoding;
}
else
{
if (request.ContentStream != null)
computedContentHash = request.ComputeContentStreamHash();
else
{
byte[] payloadBytes = GetRequestPayloadBytes(request);
byte[] payloadHashBytes = CryptoUtilFactory.CryptoInstance.ComputeSHA256Hash(payloadBytes);
computedContentHash = AWSSDKUtils.ToHex(payloadHashBytes, true);
}
}
if (computedContentHash != null)
{
if (shaHeaderPresent)
request.Headers[HeaderKeys.XAmzContentSha256Header] = computedContentHash;
else
request.Headers.Add(HeaderKeys.XAmzContentSha256Header, computedContentHash);
}
return computedContentHash;
}
