Remove legacy proxy code (#4570)

Also fixes the build on nightly as the offending code was removed.

Related to
https://github.com/iv-org/invidious/pull/4270#issuecomment-1858876952

src/invidious/videos.cr

@@ -398,17 +398,6 @@ def fetch_video(id, region)
     .dig?("microformat", "playerMicroformatRenderer", "availableCountries")
     .try &.as_a.map &.as_s || [] of String
 
-  # Check for region-blocks
-  if info["reason"]?.try &.as_s.includes?("your country")
-    bypass_regions = PROXY_LIST.keys & allowed_regions
-    if !bypass_regions.empty?
-      region = bypass_regions[rand(bypass_regions.size)]
-      region_info = extract_video_info(video_id: id, proxy_region: region)
-      region_info["region"] = JSON::Any.new(region) if region
-      info = region_info if !region_info["reason"]?
-    end
-  end
-
   if reason = info["reason"]?
     if reason == "Video unavailable"
       raise NotFoundException.new(reason.as_s || "")

src/invidious/videos/parser.cr

@@ -50,9 +50,9 @@ def parse_related_video(related : JSON::Any) : Hash(String, JSON::Any)?
   }
 end
 
-def extract_video_info(video_id : String, proxy_region : String? = nil)
+def extract_video_info(video_id : String)
   # Init client config for the API
-  client_config = YoutubeAPI::ClientConfig.new(proxy_region: proxy_region)
+  client_config = YoutubeAPI::ClientConfig.new
 
   # Fetch data from the player endpoint
   player_response = YoutubeAPI.player(video_id: video_id, params: "", client_config: client_config)

src/invidious/yt_backend/connection_pool.cr

@@ -24,25 +24,20 @@ struct YoutubeConnectionPool
     @pool = build_pool()
   end
 
-  def client(region = nil, &block)
-    if region
-      conn = make_client(url, region, force_resolve = true)
+  def client(&block)
+    conn = pool.checkout
+    begin
       response = yield conn
-    else
-      conn = pool.checkout
-      begin
-        response = yield conn
-      rescue ex
-        conn.close
-        conn = HTTP::Client.new(url)
+    rescue ex
+      conn.close
+      conn = HTTP::Client.new(url)
 
-        conn.family = CONFIG.force_resolve
-        conn.family = Socket::Family::INET if conn.family == Socket::Family::UNSPEC
-        conn.before_request { |r| add_yt_headers(r) } if url.host == "www.youtube.com"
-        response = yield conn
-      ensure
-        pool.release(conn)
-      end
+      conn.family = CONFIG.force_resolve
+      conn.family = Socket::Family::INET if conn.family == Socket::Family::UNSPEC
+      conn.before_request { |r| add_yt_headers(r) } if url.host == "www.youtube.com"
+      response = yield conn
+    ensure
+      pool.release(conn)
     end
 
     response
@@ -60,9 +55,9 @@ struct YoutubeConnectionPool
 end
 
 def make_client(url : URI, region = nil, force_resolve : Bool = false)
-  client = HTTPClient.new(url, OpenSSL::SSL::Context::Client.insecure)
+  client = HTTP::Client.new(url)
 
-  # Some services do not support IPv6.
+  # Force the usage of a specific configured IP Family
   if force_resolve
     client.family = CONFIG.force_resolve
   end
@@ -71,17 +66,6 @@ def make_client(url : URI, region = nil, force_resolve : Bool = false)
   client.read_timeout = 10.seconds
   client.connect_timeout = 10.seconds
 
-  if region
-    PROXY_LIST[region]?.try &.sample(40).each do |proxy|
-      begin
-        proxy = HTTPProxy.new(proxy_host: proxy[:ip], proxy_port: proxy[:port])
-        client.set_proxy(proxy)
-        break
-      rescue ex
-      end
-    end
-  end
-
   return client
 end
 

src/invidious/yt_backend/youtube_api.cr

@@ -188,10 +188,6 @@ module YoutubeAPI
   # conf_2 = ClientConfig.new(client_type: ClientType::Android)
   # YoutubeAPI::player(video_id: "dQw4w9WgXcQ", client_config: conf_2)
   #
-  # # Proxy request through russian proxies
-  # conf_3 = ClientConfig.new(proxy_region: "RU")
-  # YoutubeAPI::next({video_id: "dQw4w9WgXcQ"}, client_config: conf_3)
-  # ```
   #
   struct ClientConfig
     # Type of client to emulate.
@@ -202,16 +198,11 @@ module YoutubeAPI
     # (this is passed as the `gl` parameter).
     property region : String | Nil
 
-    # ISO code of country where the proxy is located.
-    # Used in case of geo-restricted videos.
-    property proxy_region : String | Nil
-
     # Initialization function
     def initialize(
       *,
       @client_type = ClientType::Web,
-      @region = "US",
-      @proxy_region = nil
+      @region = "US"
     )
     end
 
@@ -271,9 +262,8 @@ module YoutubeAPI
     # Convert to string, for logging purposes
     def to_s
       return {
-        client_type:  self.name,
-        region:       @region,
-        proxy_region: @proxy_region,
+        client_type: self.name,
+        region:      @region,
       }.to_s
     end
   end
@@ -620,7 +610,7 @@ module YoutubeAPI
     LOGGER.trace("YoutubeAPI: POST data: #{data}")
 
     # Send the POST request
-    body = YT_POOL.client(client_config.proxy_region) do |client|
+    body = YT_POOL.client() do |client|
       client.post(url, headers: headers, body: data.to_json) do |response|
         self._decompress(response.body_io, response.headers["Content-Encoding"]?)
       end