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ragex

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Hybrid Retrieval-Augmented Generation (RAG) system for multi-language codebase analysis. MCP server combining static analysis, knowledge graphs, semantic search with local ML, and advanced graph algorithms for AI-powered code understanding.

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ragex lib ragex api auth.ex
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lib/ragex/api/auth.ex 

defmodule Ragex.API.Auth do

  @moduledoc """

  Plug for optional API key authentication.



  When `RAGEX_API_KEY` environment variable is set, all requests must include

  a matching `Authorization: Bearer <key>` header. When the env var is unset,

  all requests pass through without authentication.

  """



  @behaviour Plug



  import Plug.Conn



  @impl true

  def init(opts), do: opts



  @impl true

  def call(conn, _opts) do

    case System.get_env("RAGEX_API_KEY") do

      nil ->

        # No API key configured -- open access

        conn



      "" ->

        conn



      expected_key ->

        case get_req_header(conn, "authorization") do

          ["Bearer " <> provided_key] when provided_key == expected_key ->

            conn



          _ ->

            conn

            |> put_resp_content_type("application/json")

            |> send_resp(

              401,

              :json.encode(%{error: "Unauthorized", message: "Invalid or missing API key"})

            )

            |> halt()

        end

    end

  end

end