/// <summary>
/// Calculates the hash for the stream so far and disables any further
/// hashing.
/// </summary>
public override void CalculateHash()
{
if (!FinishedHashing)
{
if (ExpectedLength < 0 || CurrentPosition == ExpectedLength)
{
CalculatedHash = Algorithm.AppendLastBlock(new byte[0]);
}
else
{
CalculatedHash = new byte[0];
}
if (CalculatedHash.Length > 0 && ExpectedHash != null && ExpectedHash.Length > 0)
{
// In Unity, the http client (either WWW or UnityWebRequest) unzips responses
// that have Content-Encoding "gzip". After unzipping, it replaces the response
// data with the unzipped content, removes the Content-Encoding header, and
// makes no indication that the transformation has occured. Therefore, we can
// not throw an exception when the hash or the decompreesed data does not match
// the expected hash of the compressed data.
if (!CompareHashes(ExpectedHash, CalculatedHash))
{
_logger.InfoFormat(
"The expected hash is not equal to the calculated hash. This can " +
"occur when the Http client decompresses a response body from " +
"gzip format before the hash is calculated, in which case this" +
"is not an error.");
}
}
}
}
public virtual void CalculateHash()
{
if (!FinishedHashing)
{
if (ExpectedLength < 0 || CurrentPosition == ExpectedLength)
{
CalculatedHash = Algorithm.AppendLastBlock(new byte[0]);
}
else
{
CalculatedHash = new byte[0];
}
if (CalculatedHash.Length != 0 && ExpectedHash != null && ExpectedHash.Length != 0 && !CompareHashes(ExpectedHash, CalculatedHash))
{
throw new AmazonClientException("Expected hash not equal to calculated hash");
}
}
}
