setMD5Hash not working as expected

[Scott]

I've been using this statement successfully to make sure uploaded
files are correctly uploaded:
s3Object.setMd5Hash(ServiceUtils.computeMD5Hash(byteArray));

Now I've had to change the byteArray to an inputStream. Great news is
that an overloaded computeMD5Hash accepts an inputStream:
s3Object.setMd5Hash(ServiceUtils.computeMD5Hash(inputStream));

the problem is when I use this mechanism and I call:
s3Service.putObject(fileBucket, s3Object);

then JetS3t hangs, eventually timing out. Do I need to reset the
inputStream after computing the MD5Hash? How is this supposed to work?

[James Murty]

Hi,

The ServiceUtils#computeMD5Hash(InputStream) method consumes and closes the input stream you give it. To send the same data to S3 after calculating the MD5 hash with this method, you will need to create a new input stream and provide this to the S3Service object.

If you are uploading files you should consider using one of the S3Object constructors that takes a File object, since this will do all the hashing work for you.

James

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[Scott]

Hi James, thanks for the answer.

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