Why does file uploaded to S3 have content type application/octet-stream unless i name the file .html

Question

Even though I set content type to text/html it ends up as application/octet-stream on S3.

ByteArrayInputStream contentsAsStream = new ByteArrayInputStream(c         


        

Answer 1

It seems that

When uploading files, the AWS S3 Java client will attempt to determine the correct content type if one hasn't been set yet. Users are responsible for ensuring a suitable content type is set when uploading streams. If no content type is provided and cannot be determined by the filename, the default content type, "application/octet-stream", will be used.

Giving the file a .html extension provides a way to set the correct type.

According to the examples I've been looking at, the code you show should be doing what you want to do. :/