Today I Learned

A Hashrocket project

Convert HTTPoison Request into curl command

Today I learned how to convert a HTTPoison Request into a curl command, useful for logs. This might be useful to someone else, so I am sharing:

defmodule MyHTTP do
  def curl(%HTTPoison.Request{} = req) do
    headers = req.headers |> Enum.map(fn {k, v} -> "-H \"#{k}: #{v}\"" end) |> Enum.join(" ")
    body = req.body && req.body != "" && "-d '#{req.body}'" || nil
    params = URI.encode_query(req.params || [])
    url = [req.url, params] |> Enum.filter(& &1 != "") |> Enum.join("?")

    [
      "curl -v -X",
      to_string(req.method),
      headers,
      body,
      url,
      ";"
    ]
    |> Enum.filter(& &1)
    |> Enum.map(&String.trim/1)
    |> Enum.filter(& &1 != "")
    |> Enum.join(" ")
  end
end

And here’s an example of usage:

MyHTTP.curl(%HTTPoison.Request{
  url: "https://til.hashrocket.com",
  params: [q: "elixir"]
})

"curl -v -X get https://til.hashrocket.com?q=elixir ;"
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