repro.exs

method = :get
url = "http://foo.bar/lol"
headers = [host: "foo.bar"]
body = "This is some body stuff"
access_key_id = "1234"
secret_access_key = "abcdef"
region = "us-west-2"

aws_config = %{}
  |> Map.put(:access_key_id, access_key_id)
  |> Map.put(:secret_access_key, secret_access_key)
  |> Map.put(:region, region)
  |> Map.put(:enabled, true)
Application.put_env(:elastic, :aws, aws_config)

IO.inspect Elastic.AWS.sign_authorization_headers(method, url, headers, body)

# Under 0.6.4, this results in:
# [Authorization: [{"X-Amz-Date", "20170613T001436Z"},
#   {"authorization",
#      "AWS4-HMAC-SHA256 Credential=1234/20170613/us-west-2/es/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date;x-amz-date,Signature=bbf3e41dd9e89039df8acbb87356310df4ea96b95a92dbdd85482c4a07e2e96b"},
#      {"host", "foo.bar"},
#      {"x-amz-content-sha256",
#       "ec3654a7885b4db55f6c475cae673da49e88da7164495e23434e403ef924c0e5"},
#      {"x-amz-date", "20170613T001436Z"}],
#    "x-amz-content-sha256": "ec3654a7885b4db55f6c475cae673da49e88da7164495e23434e403ef924c0e5",
#    host: "foo.bar", "X-Amz-Date": "20170613T001436Z"]
#
# While under 0.6.2:
# [Authorization: "AWS4-HMAC-SHA256 Credential=1234/20170613/us-west-2/es/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=4696a1f3d5718d5d5cc0547767d2a80fc1fa3ccbccb78f7c555ce67fb6b370d9",
#  "x-amz-content-sha256": "ec3654a7885b4db55f6c475cae673da49e88da7164495e23434e403ef924c0e5",
#   host: "foo.bar", "X-Amz-Date": "20170613T001622Z"]
#
# Needless to say, this is a different API. Sending the 0.6.4 headers straight on to the
# http layer results in confusion.