Elixir examples for chunked transfer and send_file

hello_world_elixir/README.md

@@ -6,4 +6,4 @@ A tiny example Elli application.
 
     mix deps.get
     iex -S mix
-    curl localhost:3000/hello/world
+    curl localhost:4000/hello/world

hello_world_elixir/lib/hello_world.ex

@@ -18,11 +18,38 @@ defmodule HelloWorld do
     {200, [], "Hello, World!"}
   end
 
+  # Return 200 and the first 20 chars of this file to GET requests to /send
+  defp handle(:GET, ["send"], _req) do
+    {:ok, [], { :file, __ENV__.file, [{:bytes, 0, 20}] } }
+  end
+
+  # Return 200 and a chunked stream to GET requests to /chunked
+  defp handle(:GET, ["chunked"], req) do
+    ref = :elli_request.chunk_ref(req)
+    spawn_link fn -> chunk_loop(ref) end
+    {:chunk, [{"Content-Type", "text/event-stream"}]}
+  end
+
   # Return 404 to any other requests
   defp handle(_, _, _req) do
     {404, [], "Our princess is in another castle..."}
   end
 
+  # start the chunk_loop with count n = 10...
+  defp chunk_loop ref do
+    chunk_loop ref, 10
+  end
+  # close the request when n = 0 is reached...
+  defp chunk_loop ref, 0 do
+    :elli_request.close_chunk ref
+  end
+  # count down the counter n... once a second.
+  defp chunk_loop ref, n do
+    :timer.sleep(1000)
+    :elli_request.send_chunk(ref, ["chunk#{n}\n"])
+    chunk_loop ref, n-1
+  end
+
   # Handle request events, like request completed, exception
   # thrown, client timeout, etc. Must return `ok'.
   @impl :elli_handler

hello_world_elixir/mix.exs

@@ -22,7 +22,7 @@ defmodule HelloWorld.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:elli, "~> 2.0"},
+      {:elli, "~> 2.1"},
       {:httpoison, "~> 1.0", only: [:test]}
     ]
   end