From bc068721abc19885d5317838f820b4fa73fe87f8 Mon Sep 17 00:00:00 2001
From: Omar Roth <omarroth@hotmail.com>
Date: Sun, 15 Apr 2018 22:56:58 -0500
Subject: [PATCH] Add filtered handler for videoplayback

---
 src/helpers.cr   | 24 ++++++++++++++++++++++++
 src/invidious.cr |  3 ++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/helpers.cr b/src/helpers.cr
index 110a0831..4f59d639 100644
--- a/src/helpers.cr
+++ b/src/helpers.cr
@@ -29,6 +29,30 @@ class Config
   })
 end
 
+class FilteredCompressHandler < Kemal::Handler
+  exclude ["/videoplayback"]
+
+  def call(env)
+    return call_next env if exclude_match? env
+
+    {% if flag?(:without_zlib) %}
+      call_next env
+    {% else %}
+      request_headers = env.request.headers
+
+      if request_headers.includes_word?("Accept-Encoding", "gzip")
+        env.response.headers["Content-Encoding"] = "gzip"
+        env.response.output = Gzip::Writer.new(env.response.output, sync_close: true)
+      elsif request_headers.includes_word?("Accept-Encoding", "deflate")
+        env.response.headers["Content-Encoding"] = "deflate"
+        env.response.output = Flate::Writer.new(env.response.output, sync_close: true)
+      end
+
+      call_next env
+    {% end %}
+  end
+end
+
 class Video
   module HTTPParamConverter
     def self.from_rs(rs)
diff --git a/src/invidious.cr b/src/invidious.cr
index bd510ceb..fb405ffd 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -872,6 +872,7 @@ static_headers do |response, filepath, filestat|
 end
 
 public_folder "assets"
-gzip true
+
+add_handler FilteredCompressHandler.new
 
 Kemal.run