Plug Protobufs

A plug parser for Protobufs input. This creates a simple and easy way to accept Protobufs as the input to your plug projects.

Installation

If available in Hex, the package can be installed as:

1. Add plug_protobufs to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:plug_protobufs, "~> 0.1.4"}]
end
```

1. Add Plug.Parsers.Protobuf to your Plug parsers:

```elixir
config :plug, :parsers, [Plug.Parsers.Protobuf]
```

or add the plug yourself:

```elixir
plug Plug.Parsers,
  parsers: [Plug.Parsers.Protobuf]
```

1. Define your Protobufs:

```elixir
defmodule Requests do
  use Protobufs, """
  message HelloRequest {
    string name = 1;
  }
  message HelloResponse {
    string greeting = 1;
  }
  """
end
```

1. In your route handler, add:

```elixir
defmodule AppRouter do
  use Plug.Router

  get "/hello", private: %{protobuf: Requests.HelloRequest} do
    send_resp(conn, 200, "hello #{conn.params["_protobuf"].name}")
  end
end
```

or, if you want to response in protobufs:

```elixir
defmodule AppRouter do
  use Plug.Router

  get "/hello", private: %{protobuf: Requests.HelloRequest} do
    name = conn.params["_protobuf"].name

    conn
      |> put_resp_content_type("application/x-protobuf")
      |> send_resp(200, Requests.HelloResponse.new(greeting: "Hello #{name}"))
  end
end
```