diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a2b2c6..e5c280e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,7 +13,9 @@ endif ()
 
 find_package(Boost REQUIRED)
 
-add_executable(App ./src/main.cpp)
+add_executable(App ./src/main.cpp
+                   ./src/helpers/helpers.h
+                   ./src/helpers/helpers.cpp)
 
 target_link_libraries(App PRIVATE Boost::boost)
 
diff --git a/src/helpers/helpers.cpp b/src/helpers/helpers.cpp
new file mode 100644
index 0000000..5376ba3
--- /dev/null
+++ b/src/helpers/helpers.cpp
@@ -0,0 +1,56 @@
+#include "helpers.h"
+
+namespace uad {
+boost::beast::string_view MimeType(boost::beast::string_view path) {
+  using boost::beast::iequals;
+  auto const ext = [&path] {
+    auto const pos = path.rfind(".");
+    if (pos == boost::beast::string_view::npos)
+      return boost::beast::string_view{};
+    return path.substr(pos);
+  }();
+  if (iequals(ext, ".htm"))
+    return "text/html";
+  if (iequals(ext, ".html"))
+    return "text/html";
+  if (iequals(ext, ".php"))
+    return "text/html";
+  if (iequals(ext, ".css"))
+    return "text/css";
+  if (iequals(ext, ".txt"))
+    return "text/plain";
+  if (iequals(ext, ".js"))
+    return "application/javascript";
+  if (iequals(ext, ".json"))
+    return "application/json";
+  if (iequals(ext, ".xml"))
+    return "application/xml";
+  if (iequals(ext, ".swf"))
+    return "application/x-shockwave-flash";
+  if (iequals(ext, ".flv"))
+    return "video/x-flv";
+  if (iequals(ext, ".png"))
+    return "image/png";
+  if (iequals(ext, ".jpe"))
+    return "image/jpeg";
+  if (iequals(ext, ".jpeg"))
+    return "image/jpeg";
+  if (iequals(ext, ".jpg"))
+    return "image/jpeg";
+  if (iequals(ext, ".gif"))
+    return "image/gif";
+  if (iequals(ext, ".bmp"))
+    return "image/bmp";
+  if (iequals(ext, ".ico"))
+    return "image/vnd.microsoft.icon";
+  if (iequals(ext, ".tiff"))
+    return "image/tiff";
+  if (iequals(ext, ".tif"))
+    return "image/tiff";
+  if (iequals(ext, ".svg"))
+    return "image/svg+xml";
+  if (iequals(ext, ".svgz"))
+    return "image/svg+xml";
+  return "application/text";
+}
+}
diff --git a/src/helpers/helpers.h b/src/helpers/helpers.h
new file mode 100644
index 0000000..cc1e4d8
--- /dev/null
+++ b/src/helpers/helpers.h
@@ -0,0 +1,5 @@
+#include <boost/beast.hpp>
+
+namespace uad {
+boost::beast::string_view MimeType(boost::beast::string_view path);
+}
diff --git a/src/main.cpp b/src/main.cpp
index 62ee94e..a850df1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -17,65 +17,17 @@
 #include <thread>
 #include <vector>
 
+#include "./helpers/helpers.h"
+
 namespace beast = boost::beast;         // from <boost/beast.hpp>
 namespace http = beast::http;           // from <boost/beast/http.hpp>
 namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
 namespace net = boost::asio;            // from <boost/asio.hpp>
 using tcp = boost::asio::ip::tcp;       // from <boost/asio/ip/tcp.hpp>
+using namespace uad;
 
 // Return a reasonable mime type based on the extension of a file.
-beast::string_view mime_type(beast::string_view path) {
-  using beast::iequals;
-  auto const ext = [&path] {
-    auto const pos = path.rfind(".");
-    if (pos == beast::string_view::npos)
-      return beast::string_view{};
-    return path.substr(pos);
-  }();
-  if (iequals(ext, ".htm"))
-    return "text/html";
-  if (iequals(ext, ".html"))
-    return "text/html";
-  if (iequals(ext, ".php"))
-    return "text/html";
-  if (iequals(ext, ".css"))
-    return "text/css";
-  if (iequals(ext, ".txt"))
-    return "text/plain";
-  if (iequals(ext, ".js"))
-    return "application/javascript";
-  if (iequals(ext, ".json"))
-    return "application/json";
-  if (iequals(ext, ".xml"))
-    return "application/xml";
-  if (iequals(ext, ".swf"))
-    return "application/x-shockwave-flash";
-  if (iequals(ext, ".flv"))
-    return "video/x-flv";
-  if (iequals(ext, ".png"))
-    return "image/png";
-  if (iequals(ext, ".jpe"))
-    return "image/jpeg";
-  if (iequals(ext, ".jpeg"))
-    return "image/jpeg";
-  if (iequals(ext, ".jpg"))
-    return "image/jpeg";
-  if (iequals(ext, ".gif"))
-    return "image/gif";
-  if (iequals(ext, ".bmp"))
-    return "image/bmp";
-  if (iequals(ext, ".ico"))
-    return "image/vnd.microsoft.icon";
-  if (iequals(ext, ".tiff"))
-    return "image/tiff";
-  if (iequals(ext, ".tif"))
-    return "image/tiff";
-  if (iequals(ext, ".svg"))
-    return "image/svg+xml";
-  if (iequals(ext, ".svgz"))
-    return "image/svg+xml";
-  return "application/text";
-}
+
 
 // Append an HTTP rel-path to a local filesystem path.
 // The returned path is normalized for the platform.
@@ -178,7 +130,7 @@ void handle_request(beast::string_view doc_root,
   if (req.method() == http::verb::head) {
     http::response<http::empty_body> res{http::status::ok, req.version()};
     res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
-    res.set(http::field::content_type, mime_type(path));
+    res.set(http::field::content_type, MimeType(path));
     res.content_length(size);
     res.keep_alive(req.keep_alive());
     return send(std::move(res));
@@ -189,7 +141,7 @@ void handle_request(beast::string_view doc_root,
       std::piecewise_construct, std::make_tuple(std::move(body)),
       std::make_tuple(http::status::ok, req.version())};
   res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
-  res.set(http::field::content_type, mime_type(path));
+  res.set(http::field::content_type, MimeType(path));
   res.content_length(size);
   res.keep_alive(req.keep_alive());
   return send(std::move(res));