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0.4.1
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lib/plug/method_override.ex
defmodule Plug.MethodOverride do
@moduledoc """
This plug overrides the request's `POST` method with the method defined in
the `_method` request parameter.
The `POST` method can be overridden only with on of these HTTP methods:
* `PUT`
* `PATCH`
* `DELETE`
This plug expects the parameters to be already parsed and fetched. Parameters
are fetched with `Plug.Conn.fetch_params/1` and parsed with `Plug.Parsers`.
This plug doesn't accept any options.
## Examples
Plug.MethodOverride.call(conn, [])
"""
@behaviour Plug
@allowed_methods ~w(DELETE PUT PATCH)
def init([]), do: []
def call(conn, []) do
if conn.method == "POST" do
override_method(conn)
else
conn
end
end
@spec override_method(Plug.Conn.t) :: Plug.Conn.t
defp override_method(conn) do
method = (conn.params["_method"] || "") |> String.upcase
cond do
method in @allowed_methods -> %{conn | method: method}
true -> conn
end
end
end