Add parameter to disable `force_resolve` in `make_client` (#4335)

* Add option to disable force_resolve in make_client

Some websites such as archive.org and textcaptcha.com
does not support IPv6 and as such requests fail when Invidious requests
with IPv6 to those services.

* Reenable force_resolve on pubsub subcribe request

* Make force_resolve false by default in make_client

* Remove missed explicit force_resolve=false

2 files changed, 14 insertions, 9 deletions

diff --git a/src/invidious/routes/video_playback.cr b/src/invidious/routes/video_playback.cr
index 1d5aa914..ec18f3b8 100644
--- a/src/invidious/routes/video_playback.cr
+++ b/src/invidious/routes/video_playback.cr
@@ -42,7 +42,7 @@ module Invidious::Routes::VideoPlayback
       headers["Range"] = "bytes=#{range_for_head}"
     end
 
-    client = make_client(URI.parse(host), region)
+    client = make_client(URI.parse(host), region, force_resolve = true)
     response = HTTP::Client::Response.new(500)
     error = ""
     5.times do
@@ -57,7 +57,7 @@ module Invidious::Routes::VideoPlayback
           if new_host != host
             host = new_host
             client.close
-            client = make_client(URI.parse(new_host), region)
+            client = make_client(URI.parse(new_host), region, force_resolve = true)
           end
 
           url = "#{location.request_target}&host=#{location.host}#{region ? "&region=#{region}" : ""}"
@@ -71,7 +71,7 @@ module Invidious::Routes::VideoPlayback
         fvip = "3"
 
         host = "https://r#{fvip}---#{mn}.googlevideo.com"
-        client = make_client(URI.parse(host), region)
+        client = make_client(URI.parse(host), region, force_resolve = true)
       rescue ex
         error = ex.message
       end
@@ -196,7 +196,7 @@ module Invidious::Routes::VideoPlayback
             break
           else
             client.close
-            client = make_client(URI.parse(host), region)
+            client = make_client(URI.parse(host), region, force_resolve = true)
           end
         end
 
diff --git a/src/invidious/yt_backend/connection_pool.cr b/src/invidious/yt_backend/connection_pool.cr
index 36e82766..81cfb272 100644
--- a/src/invidious/yt_backend/connection_pool.cr
+++ b/src/invidious/yt_backend/connection_pool.cr
@@ -26,7 +26,7 @@ struct YoutubeConnectionPool
 
   def client(region = nil, &block)
     if region
-      conn = make_client(url, region)
+      conn = make_client(url, region, force_resolve = true)
       response = yield conn
     else
       conn = pool.checkout
@@ -59,9 +59,14 @@ struct YoutubeConnectionPool
   end
 end
 
-def make_client(url : URI, region = nil)
+def make_client(url : URI, region = nil, force_resolve : Bool = false)
   client = HTTPClient.new(url, OpenSSL::SSL::Context::Client.insecure)
-  client.family = CONFIG.force_resolve
+
+  # Some services do not support IPv6.
+  if force_resolve
+    client.family = CONFIG.force_resolve
+  end
+
   client.before_request { |r| add_yt_headers(r) } if url.host == "www.youtube.com"
   client.read_timeout = 10.seconds
   client.connect_timeout = 10.seconds
@@ -80,8 +85,8 @@ def make_client(url : URI, region = nil)
   return client
 end
 
-def make_client(url : URI, region = nil, &block)
-  client = make_client(url, region)
+def make_client(url : URI, region = nil, force_resolve : Bool = false, &block)
+  client = make_client(url, region, force_resolve)
   begin
     yield client
   ensure