From 74bee220e47fb2898906afd6f375ffd520c38657 Mon Sep 17 00:00:00 2001
From: Fijxu <fijxu@nadeko.net>
Date: Tue, 8 Oct 2024 16:36:37 -0300
Subject: [PATCH] fixup! Feat: Experimental support for external videoplayback
 proxies

---
 src/invidious.cr                           |  4 ++++
 src/invidious/jobs/check_external_proxy.cr | 13 +++++++++++++
 src/invidious/routes/api/manifest.cr       | 15 +++++++++++++--
 3 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 src/invidious/jobs/check_external_proxy.cr

diff --git a/src/invidious.cr b/src/invidious.cr
index 8f79bcf3..97ae8254 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -188,6 +188,10 @@ Invidious::Jobs.register Invidious::Jobs::ClearExpiredItemsJob.new
 
 Invidious::Jobs.register Invidious::Jobs::InstanceListRefreshJob.new
 
+if CONFIG.external_videoplayback_proxy
+  Invidious::Jobs.register Invidious::Jobs::CheckExternalProxy.new
+end
+
 Invidious::Jobs.start_all
 
 def popular_videos
diff --git a/src/invidious/jobs/check_external_proxy.cr b/src/invidious/jobs/check_external_proxy.cr
new file mode 100644
index 00000000..ce0b296e
--- /dev/null
+++ b/src/invidious/jobs/check_external_proxy.cr
@@ -0,0 +1,13 @@
+class Invidious::Jobs::CheckExternalProxy < Invidious::Jobs::BaseJob
+  def initialize
+  end
+
+  def begin
+    loop do
+      Invidious::Routes::API::Manifest.check_external_proxy
+      LOGGER.info("CheckExternalProxy: Done, sleeping for 1 minute")
+      sleep 1.minutes
+      Fiber.yield
+    end
+  end
+end
diff --git a/src/invidious/routes/api/manifest.cr b/src/invidious/routes/api/manifest.cr
index 0f115ed3..dcfec909 100644
--- a/src/invidious/routes/api/manifest.cr
+++ b/src/invidious/routes/api/manifest.cr
@@ -1,4 +1,15 @@
 module Invidious::Routes::API::Manifest
+  @@proxy_alive : Bool = false
+
+  def self.check_external_proxy
+    begin
+      response = HTTP::Client.get("#{CONFIG.external_videoplayback_proxy}")
+      @@proxy_alive = response.status_code == 200
+    rescue
+      @@proxy_alive = false
+    end
+  end
+
   # /api/manifest/dash/id/:id
   def self.get_dash_video_id(env)
     env.response.headers.add("Access-Control-Allow-Origin", "*")
@@ -35,7 +46,7 @@ module Invidious::Routes::API::Manifest
 
         if local
           uri = URI.parse(url)
-          if CONFIG.external_videoplayback_proxy
+          if @@proxy_alive
             url = "#{CONFIG.external_videoplayback_proxy}#{uri.request_target}host/#{uri.host}/"
           else
             url = "#{HOST_URL}#{uri.request_target}host/#{uri.host}/"
@@ -52,7 +63,7 @@ module Invidious::Routes::API::Manifest
 
     if local
       adaptive_fmts.each do |fmt|
-        if CONFIG.external_videoplayback_proxy
+        if @@proxy_alive
           fmt["url"] = JSON::Any.new("#{CONFIG.external_videoplayback_proxy}#{URI.parse(fmt["url"].as_s).request_target}")
         else
           fmt["url"] = JSON::Any.new("#{HOST_URL}#{URI.parse(fmt["url"].as_s).request_target}")