Allow getting uploads as non-chunked

lib/wiki_web/controllers/page_controller.ex

@@ -136,27 +136,35 @@ defmodule WikiWeb.PageController do
     redirect(conn, to: Routes.page_path(conn, :edit, page.id))
   end
 
-  def get_upload(conn, _params) do
+  def get_upload(conn, params) do
     upload = conn.assigns.upload
     key = get_session(conn, :content_encryption_key)
     key = Base.decode16!(key, case: :lower)
 
-    conn =
+    if Map.get(params, "oneshot") do
+      data = Upload.decrypt_content(upload, key)
+
       conn
       |> put_resp_header("content-type", upload.content_type)
-      |> send_chunked(200)
+      |> send_resp(200, data)
+    else
+      conn =
+        conn
+        |> put_resp_header("content-type", upload.content_type)
+        |> send_chunked(200)
 
-    upload
-    |> Upload.decrypt_stream(key)
-    |> Enum.reduce_while(conn, fn decrypted_chunk, conn ->
-      case chunk(conn, decrypted_chunk) do
-        {:ok, conn} ->
-          {:cont, conn}
+      upload
+      |> Upload.decrypt_stream(key)
+      |> Enum.reduce_while(conn, fn decrypted_chunk, conn ->
+        case chunk(conn, decrypted_chunk) do
+          {:ok, conn} ->
+            {:cont, conn}
 
-        {:error, :closed} ->
-          {:halt, {:halt, conn}}
-      end
-    end)
+          {:error, :closed} ->
+            {:halt, {:halt, conn}}
+        end
+      end)
+    end
   end
 
   def delete_upload(conn, _params) do