AWS Request Signature mismatch only for post query

[chrisstpierre]

My Config:

config :app, App.Elasticsearch.Cluster,
  url: "https://redacted.us-east-1.es.amazonaws.com",
  api: Elasticsearch.API.AWS,
  default_options: [
    aws: [
      region: "us-east-1",
      service: "es",
      access_key: "redacted",
      secret: "redacted"
    ]
  ],
  json_library: Jason

Getting a document:

IO.inspect(
      Elasticsearch.get(
        App.Elasticsearch.Cluster,
        "/movies/_doc/5"
      )
    )

{:ok,
 %{
   "_id" => "5",
   "_index" => "movies",
   "_primary_term" => 1,
   "_seq_no" => 0,
   "_source" => %{
     "director" => "Bennett Miller",
     "title" => "Moneyball",
     "year" => "2011"
   },
   "_type" => "_doc",
   "_version" => 1,
   "found" => true
 }}

My Query that does not work

index_pattern = "/employees-*/_search"
query = %{
      "suggest" => %{
        "employee-suggest" => %{
          "prefix" => "An",
          "completion" => %{
            "field" => "name_suggest",
            "size" => 10,
            "skip_duplicates" => true,
            "fuzzy" => %{
              "fuzziness" => 1
            }
          }
        }
      }
    }
IO.inspect(
Elasticsearch.post(
        App.Elasticsearch.Cluster,
        index_pattern,
        query
      )
)

{:error,
 %Elasticsearch.Exception{
   col: nil,
   line: nil,
   message: "The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.",
   query: nil,
   raw: %{
     "message" => "The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details."
   },
   status: nil,
   type: nil
 }}

Doing the same query with Postman does not fail like it does in the Elixir application. What is going on here?

[danielberkompas]

I'm closing this because it's an old issue. I believe this was probably a misconfiguration, not a problem with the library itself because I believe many people are using it with AWS successfully.

[dsaradini]

Just in case someone have the same problem using post _search

@chrisstpierre The problem is related to the "*" in your url, you must encode it using %2A, try this:

index_pattern = "/employees-%2A/_search"