elixir - Phoenix .NotAcceptableError : no supported media type in accept header

Question

当我运行 Phoenix 框架测试时，出现此错误:

** (Phoenix.NotAcceptableError) no supported media type in accept header.

Expected one of ["html"] but got the following formats:

  * "application/json" with extensions: ["json"]

To accept custom formats, register them under the :mime library
in your config/config.exs file:

    config :mime, :types, %{
      "application/xml" => ["xml"]
    }

And then run `mix deps.clean --build mime` to force it to be recompiled.

即使我将此行添加到我的 config.exs 中，我仍然收到错误:

config :mime, :types, %{
  "application/json" => ["json"]
}

我做错了什么？

Answer 1

在 router.ex 文件的顶部，您将有类似这样的内容，它定义了要使用的路由的管道:

  pipeline :browser do
    plug :accepts, ["html"]
    plug :fetch_session
    plug :fetch_live_flash
    plug :put_root_layout, {FirehoseWeb.LayoutView, :root}
    plug :protect_from_forgery
    plug :put_secure_browser_headers
  end

  pipeline :api do
    plug :accepts, ["json"]
  end

然后，您将拥有使用这些管道并定义路由的范围:

  scope "/", AppWeb do
    pipe_through :browser

    get "/", PageController, :index
  end

上面的范围通过 :browser 进行管道传输，因此它只接受 html。如果您有单独的仅 JSON 路由“/api/foo”，那么您需要为其通过 :api 管道定义另一个作用域，如下所示:

    scope "/api", AppWeb do
    pipe_through :api

    resources "/foo", FooController
  end

如果您希望使用相同的路由来处理 HTML 和 JSON，则将管道中的第一个插件更改为: plug :accepts, ["html", "json"]