Code for step 2

lib/sentry_sample_app_web/controllers/math_controller.ex

@@ -0,0 +1,18 @@
+defmodule SentrySampleAppWeb.MathController do
+  use SentrySampleAppWeb, :controller
+
+  def create(conn, %{"function" => "add", "val_1" => val_1, "val_2" => val_2}) do
+    conn
+    |> json(%{result: val_1 + val_2})
+  end
+
+  def create(conn, %{"function" => "div", "val_1" => val_1, "val_2" => val_2}) do
+    conn
+    |> json(%{result: val_1 / val_2})
+  end
+
+  def create(conn, %{"function" => "mult", "val_1" => val_1, "val_2" => val_2}) do
+    conn
+    |> json(%{result: val_1 * val_2})
+  end
+end

lib/sentry_sample_app_web/router.ex

@@ -13,10 +13,10 @@ defmodule SentrySampleAppWeb.Router do
     plug :accepts, ["json"]
   end
 
-  scope "/", SentrySampleAppWeb do
-    pipe_through :browser
+  scope "/math", SentrySampleAppWeb do
+    pipe_through :api
 
-    get "/", PageController, :index
+    post "/", MathController, :create
   end
 
   # Other scopes may use custom stacks.