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HTTP client library, with support for middleware and multiple adapters.

Security advisory: This version has known vulnerabilities. View advisories
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tesla lib tesla middleware keep_request.ex
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lib/tesla/middleware/keep_request.ex 

defmodule Tesla.Middleware.KeepRequest do

  @moduledoc """

  Store request URL, body, and headers into `:opts`.



  ## Examples



  ```

  defmodule MyClient do

    def client do

      Tesla.client([

        Tesla.Middleware.KeepRequest,

        Tesla.Middleware.PathParams

      ])

    end

  end



  client = MyClient.client()

  {:ok, env} = Tesla.post(client, "/users/:user_id", "request-data", opts: [path_params: [user_id: "1234"]])



  env.body

  # => "response-data"



  env.opts[:req_body]

  # => "request-data"



  env.opts[:req_headers]

  # => [{"request-headers", "are-safe"}, ...]



  env.opts[:req_url]

  # => "http://localhost:8000/users/:user_id

  ```



  ## Observability



  In practice, you would combine `Tesla.Middleware.KeepRequest`, `Tesla.Middleware.PathParams`, and

  `Tesla.Middleware.Telemetry` to observe the request and response data.

  Keep in mind that the request order matters. Make sure to put `Tesla.Middleware.KeepRequest` before

  `Tesla.Middleware.PathParams` to make sure that the request data is stored before the path parameters are replaced.

  While keeping in mind that this is an application-specific concern, this is the overall recommendation.

  """



  @behaviour Tesla.Middleware



  @impl Tesla.Middleware

  def call(env, next, _opts) do

    env

    |> Tesla.put_opt(:req_body, env.body)

    |> Tesla.put_opt(:req_headers, env.headers)

    |> Tesla.put_opt(:req_url, env.url)

    |> Tesla.run(next)

  end

end