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AWS client for Elixir. Currently supports Dynamo, DynamoStreams, EC2, Firehose, Kinesis, KMS, Lambda, RRDS, Route53, S3, SES, SNS, SQS, STS and others.
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lib/ex_aws/json/codec.ex
defmodule ExAws.JSON.Codec do
use Behaviour
@moduledoc """
Defines the specification for a JSON codec.
ExAws supports the use of your favorite JSON codec provided it fulfills this specification.
Poison fulfills this spec without modification, and is the default.
See the contents of `ExAws.JSON.JSX` for an example of an alternative implementation.
## Example
Here for example is the code required to make HTTPotion comply with this spec.
In your config you would do:
```elixir
config :ex_aws,
json_codec: ExAws.JSON.JSX
```
```elixir
defmodule ExAws.JSON.JSX do
@behaviour ExAws.JSON.Codec
@moduledoc false
def encode!(%{} = map) do
map
|> Map.to_list
|> :jsx.encode
|> case do
"[]" -> "{}"
val -> val
end
end
def encode(map) do
{:ok, encode!(map)}
end
def decode!(string) do
:jsx.decode(string)
|> Enum.into(%{})
end
def decode(string) do
{:ok, decode!(string)}
end
end
```
"""
defcallback encode!(%{}) :: String.t
defcallback encode(%{}) :: {:ok, String.t} | {:error, String.t}
defcallback decode!(String.t) :: %{}
defcallback decode(String.t) :: {:ok, %{}} | {:error, %{}}
end