messages

lib/handler.ex

@@ -1,6 +1,7 @@
 defmodule Servy.Handler do
   alias Servy.Conv
   alias Servy.BearController
+  alias Servy.VideoCam
   import Servy.Plugins, only: [rewrite_path: 1, log: 1, track: 1]
   import Servy.Parser, only: [parse: 1]
   @moduledoc "Handles HTTP requests."
@@ -20,6 +21,37 @@ defmodule Servy.Handler do
   #   route(conv, conv.method, conv.path)
   # end
 
+  def route(%Conv{method: "GET", path: "/snapshots"} = conv) do
+    # the request-handling process
+    parent = self()
+
+    spawn(fn -> send(parent, {:result, VideoCam.get_snapshot("cam-1")}) end)
+    spawn(fn -> send(parent, {:result, VideoCam.get_snapshot("cam-2")}) end)
+    spawn(fn -> send(parent, {:result, VideoCam.get_snapshot("cam-3")}) end)
+
+    snapshot1 =
+      receive do
+        {:result, filename} -> filename
+      end
+
+    snapshot2 =
+      receive do
+        {:result, filename} -> filename
+      end
+
+    snapshot3 =
+      receive do
+        {:result, filename} -> filename
+      end
+
+    # snapshot2 = VideoCam.get_snapshot("cam-2")
+    # snapshot3 = VideoCam.get_snapshot("cam-3")
+
+    snapshots = [snapshot1, snapshot2, snapshot3]
+
+    %{conv | status: 200, resp_body: inspect(snapshots)}
+  end
+
   def route(%Conv{method: "GET", path: "/kaboom"}) do
     raise "Kaboom!"
   end

lib/video_cam.ex

@@ -0,0 +1,15 @@
+defmodule Servy.VideoCam do
+  @doc """
+  Simulates sending a request to an external API
+  to get a snapshot image from a video camera.
+  """
+  def get_snapshot(camera_name) do
+    # CODE GOES HERE TO SEND A REQUEST TO THE EXTERNAL API
+
+    # Sleep for 1 second to simulate that the API can be slow:
+    :timer.sleep(1000)
+
+    # Example response returned from the API:
+    "#{camera_name}-snapshot.jpg"
+  end
+end