From 8b56a038b7c30cb41dbaf67dd42566d84787d79f Mon Sep 17 00:00:00 2001
From: saltycrys <73420320+saltycrys@users.noreply.github.com>
Date: Mon, 4 Jan 2021 05:24:08 +0100
Subject: [PATCH 1/2] Set content type for HTML error helpers

This fixes `Unexpected char '<' at 1:1` errors caused by content type mismatch.
---
 src/invidious/helpers/errors.cr | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/invidious/helpers/errors.cr b/src/invidious/helpers/errors.cr
index 4487ff8c..2c62d44b 100644
--- a/src/invidious/helpers/errors.cr
+++ b/src/invidious/helpers/errors.cr
@@ -26,6 +26,7 @@ def error_template_helper(env : HTTP::Server::Context, config : Config, locale :
   if exception.is_a?(InfoException)
     return error_template_helper(env, config, locale, status_code, exception.message || "")
   end
+  env.response.content_type = "text/html"
   env.response.status_code = status_code
   issue_template = %(Title: `#{exception.message} (#{exception.class})`)
   issue_template += %(\nDate: `#{Time::Format::ISO_8601_DATE_TIME.format(Time.utc)}`)
@@ -43,6 +44,7 @@ def error_template_helper(env : HTTP::Server::Context, config : Config, locale :
 end
 
 def error_template_helper(env : HTTP::Server::Context, config : Config, locale : Hash(String, JSON::Any) | Nil, status_code : Int32, message : String)
+  env.response.content_type = "text/html"
   env.response.status_code = status_code
   error_message = translate(locale, message)
   return templated "error"

From 36e9fb9d6835dc3738e6142d1c91d7a2bd249d35 Mon Sep 17 00:00:00 2001
From: saltycrys <73420320+saltycrys@users.noreply.github.com>
Date: Mon, 4 Jan 2021 05:35:59 +0100
Subject: [PATCH 2/2] Fix `watch_videos` endpoint

Playlists created by `watch_videos` do not have an author which caused a crash
previously.
---
 src/invidious.cr           |  2 ++
 src/invidious/playlists.cr | 24 ++++++++++++++++--------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/invidious.cr b/src/invidious.cr
index 8d4c2e58..1d2125cb 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -2621,6 +2621,8 @@ end
 
     begin
       playlist = get_playlist(PG_DB, plid, locale)
+    rescue ex : InfoException
+      next error_json(404, ex)
     rescue ex
       next error_json(404, "Playlist does not exist.")
     end
diff --git a/src/invidious/playlists.cr b/src/invidious/playlists.cr
index d5b41caa..25797a36 100644
--- a/src/invidious/playlists.cr
+++ b/src/invidious/playlists.cr
@@ -365,9 +365,13 @@ def fetch_playlist(plid, locale)
   end
 
   initial_data = extract_initial_data(response.body)
-  playlist_info = initial_data["sidebar"]?.try &.["playlistSidebarRenderer"]?.try &.["items"]?.try &.[0]["playlistSidebarPrimaryInfoRenderer"]?
 
+  playlist_sidebar_renderer = initial_data["sidebar"]?.try &.["playlistSidebarRenderer"]?.try &.["items"]?
+  raise InfoException.new("Could not extract playlistSidebarRenderer.") if !playlist_sidebar_renderer
+
+  playlist_info = playlist_sidebar_renderer[0]["playlistSidebarPrimaryInfoRenderer"]?
   raise InfoException.new("Could not extract playlist info") if !playlist_info
+
   title = playlist_info["title"]?.try &.["runs"][0]?.try &.["text"]?.try &.as_s || ""
 
   desc_item = playlist_info["description"]?
@@ -392,14 +396,18 @@ def fetch_playlist(plid, locale)
     end
   end
 
-  author_info = initial_data["sidebar"]?.try &.["playlistSidebarRenderer"]?.try &.["items"]?.try &.[1]["playlistSidebarSecondaryInfoRenderer"]?
-    .try &.["videoOwner"]["videoOwnerRenderer"]?
+  if playlist_sidebar_renderer.size < 2
+    author = ""
+    author_thumbnail = ""
+    ucid = ""
+  else
+    author_info = playlist_sidebar_renderer[1]["playlistSidebarSecondaryInfoRenderer"]?.try &.["videoOwner"]["videoOwnerRenderer"]?
+    raise InfoException.new("Could not extract author info") if !author_info
 
-  raise InfoException.new("Could not extract author info") if !author_info
-
-  author_thumbnail = author_info["thumbnail"]["thumbnails"][0]["url"]?.try &.as_s || ""
-  author = author_info["title"]["runs"][0]["text"]?.try &.as_s || ""
-  ucid = author_info["title"]["runs"][0]["navigationEndpoint"]["browseEndpoint"]["browseId"]?.try &.as_s || ""
+    author = author_info["title"]["runs"][0]["text"]?.try &.as_s || ""
+    author_thumbnail = author_info["thumbnail"]["thumbnails"][0]["url"]?.try &.as_s || ""
+    ucid = author_info["title"]["runs"][0]["navigationEndpoint"]["browseEndpoint"]["browseId"]?.try &.as_s || ""
+  end
 
   return Playlist.new({
     title:            title,