Remove lsquic from codebase

config/config.example.yml

@@ -140,27 +140,6 @@ https_only: false
 ##
 #pool_size: 100
 
-##
-## Enable/Disable the use of QUIC (HTTP/3) when connecting
-## to the youtube API and websites ('youtube.com', 'ytimg.com').
-## QUIC's main advantages are its lower latency and lower bandwidth
-## use, compared to its predecessors. However, the current version
-## of QUIC used in invidious is still based on the IETF draft 31,
-## meaning that the underlying library may still not be fully
-## optimized. You can read more about QUIC at the link below:
-## https://datatracker.ietf.org/doc/html/draft-ietf-quic-transport-31
-##
-## Note: you should try both options and see what is the best for your
-## instance. In general QUIC is recommended for public instances. Your
-## mileage may vary.
-##
-## Note 2: Using QUIC prevents some captcha challenges from appearing.
-## See: https://github.com/iv-org/invidious/issues/957#issuecomment-576424042
-##
-## Accepted values: true, false
-## Default: false
-##
-#use_quic: false
 
 ##
 ## Additional cookies to be sent when requesting the youtube API.

shard.lock

@@ -24,10 +24,6 @@ shards:
     git: https://github.com/jeromegn/kilt.git
     version: 0.6.1
 
-  lsquic:
-    git: https://github.com/iv-org/lsquic.cr.git
-    version: 2.18.1-2
-
   pg:
     git: https://github.com/will/crystal-pg.git
     version: 0.24.0

shard.yml

@@ -25,9 +25,6 @@ dependencies:
   protodec:
     github: iv-org/protodec
     version: ~> 0.1.5
-  lsquic:
-    github: iv-org/lsquic.cr
-    version: ~> 2.18.1-2
   athena-negotiation:
     github: athena-framework/negotiation
     version: ~> 0.1.1

src/invidious.cr

@@ -90,7 +90,7 @@ SOFTWARE = {
   "branch"  => "#{CURRENT_BRANCH}",
 }
 
-YT_POOL = YoutubeConnectionPool.new(YT_URL, capacity: CONFIG.pool_size, use_quic: CONFIG.use_quic)
+YT_POOL = YoutubeConnectionPool.new(YT_URL, capacity: CONFIG.pool_size)
 
 # CLI
 Kemal.config.extra_options do |parser|

src/invidious/config.cr

@@ -126,8 +126,6 @@ class Config
   property host_binding : String = "0.0.0.0"
   # Pool size for HTTP requests to youtube.com and ytimg.com (each domain has a separate pool of `pool_size`)
   property pool_size : Int32 = 100
-  # Use quic transport for youtube api
-  property use_quic : Bool = false
 
   # Saved cookies in "name1=value1; name2=value2..." format
   @[YAML::Field(converter: Preferences::StringToCookies)]

src/invidious/routes/images.cr

@@ -3,17 +3,7 @@ module Invidious::Routes::Images
   def self.ggpht(env)
     url = env.request.path.lchop("/ggpht")
 
-    headers = (
+    headers = HTTP::Headers.new
-      {% 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]?
@@ -42,22 +32,9 @@ module Invidious::Routes::Images
     }
 
     begin
-      {% 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("https://yt3.ggpht.com#{url}") do |resp|
         return request_proc.call(resp)
       end
-        end
-      {% else %}
-        # This can likely be optimized into a (small) pool sometime in the future.
-        HTTP::Client.get("https://yt3.ggpht.com#{url}") do |resp|
-          return request_proc.call(resp)
-        end
-      {% end %}
     rescue ex
     end
   end
@@ -78,10 +55,6 @@ module Invidious::Routes::Images
 
     headers = HTTP::Headers.new
 
-    {% unless flag?(:disable_quic) %}
-      headers[":authority"] = "#{authority}.ytimg.com"
-    {% end %}
-
     REQUEST_HEADERS_WHITELIST.each do |header|
       if env.request.headers[header]?
         headers[header] = env.request.headers[header]
@@ -107,22 +80,9 @@ module Invidious::Routes::Images
     }
 
     begin
-      {% 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("https://#{authority}.ytimg.com#{url}") do |resp|
         return request_proc.call(resp)
       end
-        end
-      {% else %}
-        # This can likely be optimized into a (small) pool sometime in the future.
-        HTTP::Client.get("https://#{authority}.ytimg.com#{url}") do |resp|
-          return request_proc.call(resp)
-        end
-      {% end %}
     rescue ex
     end
   end
@@ -133,17 +93,7 @@ module Invidious::Routes::Images
     name = env.params.url["name"]
     url = env.request.resource
 
-    headers = (
+    headers = HTTP::Headers.new
-      {% unless flag?(:disable_quic) %}
-        if CONFIG.use_quic
-          HTTP::Headers{":authority" => "i9.ytimg.com"}
-        else
-          HTTP::Headers.new
-        end
-      {% else %}
-        HTTP::Headers.new
-      {% end %}
-    )
 
     REQUEST_HEADERS_WHITELIST.each do |header|
       if env.request.headers[header]?
@@ -169,22 +119,9 @@ module Invidious::Routes::Images
     }
 
     begin
-      {% 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("https://i9.ytimg.com#{url}") do |resp|
         return request_proc.call(resp)
       end
-        end
-      {% else %}
-        # This can likely be optimized into a (small) pool sometime in the future.
-        HTTP::Client.get("https://i9.ytimg.com#{url}") do |resp|
-          return request_proc.call(resp)
-        end
-      {% end %}
     rescue ex
     end
   end
@@ -223,41 +160,16 @@ module Invidious::Routes::Images
     id = env.params.url["id"]
     name = env.params.url["name"]
 
-    headers = (
+    headers = HTTP::Headers.new
-      {% unless flag?(:disable_quic) %}
-        if CONFIG.use_quic
-          HTTP::Headers{":authority" => "i.ytimg.com"}
-        else
-          HTTP::Headers.new
-        end
-      {% else %}
-        HTTP::Headers.new
-      {% end %}
-    )
 
     if name == "maxres.jpg"
       build_thumbnails(id).each do |thumb|
         thumbnail_resource_path = "/vi/#{id}/#{thumb[:url]}.jpg"
-        # Logic here is short enough that manually typing them out should be fine.
-        {% unless flag?(:disable_quic) %}
-          if CONFIG.use_quic
-            if YT_POOL.client &.head(thumbnail_resource_path, headers).status_code == 200
-              name = thumb[:url] + ".jpg"
-              break
-            end
-          else
-            if HTTP::Client.head("https://i.ytimg.com#{thumbnail_resource_path}").status_code == 200
-              name = thumb[:url] + ".jpg"
-              break
-            end
-          end
-        {% else %}
         # This can likely be optimized into a (small) pool sometime in the future.
         if HTTP::Client.head("https://i.ytimg.com#{thumbnail_resource_path}").status_code == 200
           name = thumb[:url] + ".jpg"
           break
         end
-        {% end %}
       end
     end
 
@@ -287,22 +199,10 @@ module Invidious::Routes::Images
     }
 
     begin
-      {% 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("https://i.ytimg.com#{url}") do |resp|
-            return request_proc.call(resp)
-          end
-        end
-      {% else %}
       # This can likely be optimized into a (small) pool sometime in the future.
       HTTP::Client.get("https://i.ytimg.com#{url}") do |resp|
         return request_proc.call(resp)
       end
-      {% end %}
     rescue ex
     end
   end

src/invidious/yt_backend/connection_pool.cr

@@ -1,11 +1,3 @@
-{% unless flag?(:disable_quic) %}
-  require "lsquic"
-
-  alias HTTPClientType = QUIC::Client | HTTP::Client
-{% else %}
-  alias HTTPClientType = HTTP::Client
-{% end %}
-
 def add_yt_headers(request)
   if request.headers["User-Agent"] == "Crystal"
     request.headers["User-Agent"] ||= "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36"
@@ -26,11 +18,11 @@ struct YoutubeConnectionPool
   property! url : URI
   property! capacity : Int32
   property! timeout : Float64
-  property pool : DB::Pool(HTTPClientType)
+  property pool : DB::Pool(HTTP::Client)
 
-  def initialize(url : URI, @capacity = 5, @timeout = 5.0, use_quic = true)
+  def initialize(url : URI, @capacity = 5, @timeout = 5.0)
     @url = url
-    @pool = build_pool(use_quic)
+    @pool = build_pool()
   end
 
   def client(region = nil, &block)
@@ -43,11 +35,7 @@ struct YoutubeConnectionPool
         response = yield conn
       rescue ex
         conn.close
-        {% unless flag?(:disable_quic) %}
-          conn = CONFIG.use_quic ? QUIC::Client.new(url) : HTTP::Client.new(url)
-        {% else %}
         conn = HTTP::Client.new(url)
-        {% end %}
 
         conn.family = (url.host == "www.youtube.com") ? CONFIG.force_resolve : Socket::Family::INET
         conn.family = Socket::Family::INET if conn.family == Socket::Family::UNSPEC
@@ -61,19 +49,9 @@ struct YoutubeConnectionPool
     response
   end
 
-  private def build_pool(use_quic)
+  private def build_pool
-    DB::Pool(HTTPClientType).new(initial_pool_size: 0, max_pool_size: capacity, max_idle_pool_size: capacity, checkout_timeout: timeout) do
+    DB::Pool(HTTP::Client).new(initial_pool_size: 0, max_pool_size: capacity, max_idle_pool_size: capacity, checkout_timeout: timeout) do
-      conn = nil # Declare
-      {% unless flag?(:disable_quic) %}
-        if use_quic
-          conn = QUIC::Client.new(url)
-        else
       conn = HTTP::Client.new(url)
-        end
-      {% else %}
-        conn = HTTP::Client.new(url)
-      {% end %}
-
       conn.family = (url.host == "www.youtube.com") ? CONFIG.force_resolve : Socket::Family::INET
       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"
@@ -83,7 +61,6 @@ struct YoutubeConnectionPool
 end
 
 def make_client(url : URI, region = nil)
-  # TODO: Migrate any applicable endpoints to QUIC
   client = HTTPClient.new(url, OpenSSL::SSL::Context::Client.insecure)
   client.family = (url.host == "www.youtube.com") ? CONFIG.force_resolve : Socket::Family::UNSPEC
   client.before_request { |r| add_yt_headers(r) } if url.host == "www.youtube.com"

src/invidious/yt_backend/youtube_api.cr

@@ -595,19 +595,11 @@ module YoutubeAPI
     LOGGER.trace("YoutubeAPI: POST data: #{data}")
 
     # Send the POST request
-    if {{ !flag?(:disable_quic) }} && CONFIG.use_quic
-      # Using QUIC client
-      body = YT_POOL.client(client_config.proxy_region,
-        &.post(url, headers: headers, body: data.to_json)
-      ).body
-    else
-      # Using HTTP client
     body = YT_POOL.client(client_config.proxy_region) do |client|
       client.post(url, headers: headers, body: data.to_json) do |response|
         self._decompress(response.body_io, response.headers["Content-Encoding"]?)
       end
     end
-    end
 
     # Convert result to Hash
     initial_data = JSON.parse(body).as_h