Lowercase header keys

lib/scrivener/headers.ex

@@ -30,16 +30,16 @@ defmodule Scrivener.Headers do
   def paginate(conn, page) do
     conn
     |> put_link_header(page)
-    |> put_resp_header("Total", Integer.to_string(page.total_entries))
-    |> put_resp_header("Per-Page", Integer.to_string(page.page_size))
+    |> put_resp_header("total", Integer.to_string(page.total_entries))
+    |> put_resp_header("per-page", Integer.to_string(page.page_size))
   end
 
   defp put_link_header(conn, page) do
     link = conn
            |> pages(page)
            |> Enum.join(", ")
 
-    put_resp_header(conn, "Link", link)
+    put_resp_header(conn, "link", link)
   end
 
   defp pages(conn, page) do

mix.exs

@@ -3,7 +3,7 @@ defmodule Scrivener.Headers.Mixfile do
 
   def project do
     [app: :scrivener_headers,
-     version: "1.0.0",
+     version: "1.0.1",
      elixir: "~> 1.2",
      package: package,
      description: """

test/scrivener/headers_test.exs

@@ -20,29 +20,29 @@ defmodule Scrivener.HeadersTests do
     page = %Page{page_number: 3, page_size: 10, total_pages: 5, total_entries: 50}
     headers = paginated_headers(page)
 
-    assert headers["Total"] == "50"
-    assert headers["Per-Page"] == "10"
-    assert headers["Link"] == ~s(<http://www.example.com/test?foo=bar&page=1>; rel="first", <http://www.example.com/test?foo=bar&page=5>; rel="last", <http://www.example.com/test?foo=bar&page=4>; rel="next", <http://www.example.com/test?foo=bar&page=2>; rel="prev")
+    assert headers["total"] == "50"
+    assert headers["per-page"] == "10"
+    assert headers["link"] == ~s(<http://www.example.com/test?foo=bar&page=1>; rel="first", <http://www.example.com/test?foo=bar&page=5>; rel="last", <http://www.example.com/test?foo=bar&page=4>; rel="next", <http://www.example.com/test?foo=bar&page=2>; rel="prev")
   end
 
   test "doesn't include prev link for first page" do
     page = %Page{page_number: 1, page_size: 10, total_pages: 5, total_entries: 50}
     headers = paginated_headers(page)
 
-    refute headers["Link"] =~ ~s(rel="prev")
+    refute headers["link"] =~ ~s(rel="prev")
   end
 
   test "doesn't include next link for last page" do
     page = %Page{page_number: 5, page_size: 10, total_pages: 5, total_entries: 50}
     headers = paginated_headers(page)
 
-    refute headers["Link"] =~ ~s(rel="next")
+    refute headers["link"] =~ ~s(rel="next")
   end
 
   test "includes ports other than 80 and 443" do
     page = %Page{page_number: 5, page_size: 10, total_pages: 5, total_entries: 50}
     headers = paginated_headers(page, 1337)
 
-    assert headers["Link"] =~ ~s(<http://www.example.com:1337/test?foo=bar&page=1>)
+    assert headers["link"] =~ ~s(<http://www.example.com:1337/test?foo=bar&page=1>)
   end
 end