s3 presigned url regressions - :success_action_status

[modosc]

i just upgraded to v2 and found a few issues when generating a presigned url for an s3 object:

- unexpected value at params[:success_action_status]

:success_action_status doesn't seem to be supported anymore - this means that getting xml info back about the file after an upload won't work (see http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPOST.html)

[trevorrowe]

The v2 SDK does not provide a pre-signed POST utility at this time. Can you give a code example of what you are doing that generates this error?

[modosc]

previously we were doing something like this:

    @s3_presigned_post ||= S3_BUCKET.presigned_post
       key: s3_key,
       success_action_status: 201,
       acl: 'bucket-owner-full-control'.to_sym,
       expires: ::S3_PRESIGNED_POST_EXPIRATION,
       content_length: (0..::S3_MAX_FILE_SIZE),
       content_type: get_content_type

to adapt to v2 i changed the code like so:

    @s3_object ||= Aws::S3::Object.new bucket_name: S3_BUCKET, key: s3_key
    @s3_presigned_post ||= @s3_object.presigned_url :put,
       success_action_status: 201,
       acl: 'bucket-owner-full-control'.to_sym,
       expires: ::S3_PRESIGNED_POST_EXPIRATION,
       content_length: (0..::S3_MAX_FILE_SIZE),
       content_type: get_content_type

when i try this i get the errors from #719 and this bug. commenting out the :success_action_status and :content_length lines will make the code work.

[trevorrowe]

The #presigned_post method has no equivalent in the v2 SDK. I'm going to mark this as a feature request. Until this has been ported to the v2 SDK, you can continue using the v1 presigned post utility. You can use v1 and v2 in the same application.

[trevorrowe]

@modosc I've just submitted a pull-request to the main repository that adds pre-signed post support in v2. I would be interested in feedback: #752