From c3747c2d49ec592fac9a4583bd85fbd4333674d6 Mon Sep 17 00:00:00 2001
From: syeopite <syeopite@syeopite.dev>
Date: Fri, 8 Oct 2021 05:55:34 -0700
Subject: [PATCH] Allow ggpht queries with QUIC disabled

---
 src/invidious/routes/images.cr | 60 +++++++++++++++++++++++++---------
 1 file changed, 45 insertions(+), 15 deletions(-)

diff --git a/src/invidious/routes/images.cr b/src/invidious/routes/images.cr
index bb924cdf..e02dc9de 100644
--- a/src/invidious/routes/images.cr
+++ b/src/invidious/routes/images.cr
@@ -3,31 +3,61 @@ module Invidious::Routes::Images
   def self.ggpht(env)
     url = env.request.path.lchop("/ggpht")
 
-    headers = HTTP::Headers{":authority" => "yt3.ggpht.com"}
+    headers = (
+      {% unless flag?(:disable_quic) %}
+        if CONFIG.use_quic
+          HTTP::Headers{":authority" => "yt3.ggpht.com"}
+        else
+          HTTP::Headers.new
+        end
+      {% else %}
+        HTTP::Headers.new
+      {% end %}
+    )
+
     REQUEST_HEADERS_WHITELIST.each do |header|
       if env.request.headers[header]?
         headers[header] = env.request.headers[header]
       end
     end
 
+    # We're encapsulating this into a proc in order to easily reuse this
+    # portion of the code for each request block below.
+    request_proc = ->(response : HTTP::Client::Response) {
+      env.response.status_code = response.status_code
+      response.headers.each do |key, value|
+        if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
+          env.response.headers[key] = value
+        end
+      end
+
+      env.response.headers["Access-Control-Allow-Origin"] = "*"
+
+      if response.status_code >= 300
+        env.response.headers.delete("Transfer-Encoding")
+        return
+      end
+
+      proxy_file(response, env)
+    }
+
     begin
-      YT_POOL.client &.get(url, headers) do |response|
-        env.response.status_code = response.status_code
-        response.headers.each do |key, value|
-          if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
-            env.response.headers[key] = value
+      {% unless flag?(:disable_quic) %}
+        if CONFIG.use_quic
+          YT_POOL.client &.get(url, headers) do |resp|
+            return request_proc.call(resp)
+          end
+        else
+          HTTP::Client.get("yt3.ggpht.com#{url}") do |resp|
+            return request_proc.call(resp)
           end
         end
-
-        env.response.headers["Access-Control-Allow-Origin"] = "*"
-
-        if response.status_code >= 300
-          env.response.headers.delete("Transfer-Encoding")
-          break
+      {% else %}
+        # This can likely be optimized into a (small) pool sometime in the future.
+        HTTP::Client.get("yt3.ggpht.com#{url}") do |resp|
+          return request_proc.call(resp)
         end
-
-        proxy_file(response, env)
-      end
+      {% end %}
     rescue ex
     end
   end