Encode requests and decode responses as JSON.

This middleware requires Jason (or other engine) as dependency.

Remember to add {:jason, ">= 1.0"} to dependencies. Also, you need to recompile Tesla after adding :jason dependency:

mix deps.clean tesla
mix deps.compile tesla

If you only need to encode the request body or decode the response body, you can use Tesla.Middleware.EncodeJson or Tesla.Middleware.DecodeJson directly instead.

Examples

defmodule MyClient do
  def client do
    Tesla.client([
      # use jason engine
      Tesla.Middleware.JSON,
      # or
      {Tesla.Middleware.JSON, engine: JSX, engine_opts: [strict: [:comments]]},
      # or
      {Tesla.Middleware.JSON, engine: Poison, engine_opts: [keys: :atoms]},
      # or
      {Tesla.Middleware.JSON, decode: &JSX.decode/1, encode: &JSX.encode/1}
    ])
  end
end

Options

• :decode - decoding function
• :encode - encoding function
• :encode_content_type - content-type to be used in request header
• :engine - encode/decode engine, e.g Jason, Poison or JSX (defaults to Jason)
• :engine_opts - optional engine options
• :decode_content_types - list of additional decodable content-types