I was just trying out the example which is specified in this blog, but I am getting this error “Could not contact signing script. Status = 404”. I followed all the steps specified in the blog and also carefully changed the CORS configuration in AWS management Console too. I am not able to figure out the problem. Kindly help me out.
Here is the blog link http://www.ioncannon.net/programming/1539/direct-browser-uploading-amazon-s3-cors-fileapi-xhr2-and-signed-puts/
I faced the same problem you did trying to follow the example in this blog post. I wrote an article showing everything I had to do to make it work for me.
https://blog.pjam.me/posts/direct-upload-to-s3/
Hope it’ll work for you.