342 lines
8.3 KiB
Crystal
342 lines
8.3 KiB
Crystal
# "Invidious" (which indexes popular video sites)
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# Copyright (C) 2018 Omar Roth
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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require "kemal"
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require "option_parser"
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require "pg"
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require "xml"
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require "./helpers"
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yt_pool_size = 10
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yt_threads = 5
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yt_wait = 1.0
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Kemal.config.extra_options do |parser|
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parser.banner = "Usage: invidious [arguments]"
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parser.on("-z SIZE", "--youtube-pool=SIZE", "Number of clients in youtube pool (default: #{yt_pool_size})") do |number|
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begin
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yt_pool_size = number.to_i
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rescue ex
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puts "SIZE must be integer"
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exit
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end
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end
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parser.on("-t THREADS", "--youtube-threads=THREADS", "Number of threads for crawling (default: #{yt_threads})") do |number|
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begin
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yt_threads = number.to_i
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rescue ex
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puts "THREADS must be integer"
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exit
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end
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end
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parser.on("-w SECONDS", "--youtube-wait=SECONDS", "Time to wait between youtube server requests (default: #{yt_wait})") do |number|
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begin
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yt_wait = number.to_f64
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rescue ex
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puts "SECONDS must be integer or float"
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exit
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end
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end
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end
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Kemal::CLI.new
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PG_DB = DB.open "postgres://kemal:kemal@localhost:5432/invidious"
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YT_URL = URI.parse("https://www.youtube.com")
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REDDIT_URL = URI.parse("https://api.reddit.com")
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CONTEXT = OpenSSL::SSL::Context::Client.new
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CONTEXT.verify_mode = OpenSSL::SSL::VerifyMode::NONE
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CONTEXT.add_options(
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OpenSSL::SSL::Options::ALL |
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OpenSSL::SSL::Options::NO_SSL_V2 |
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OpenSSL::SSL::Options::NO_SSL_V3
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)
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youtube_pool = Deque.new(yt_pool_size) do
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make_client(YT_URL, CONTEXT)
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end
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# Refresh youtube_pool by crawling YT
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yt_threads.times do
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spawn do
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io = STDOUT
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ids = Deque(String).new
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random = Random.new
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yt_client = get_client(youtube_pool)
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search(random.base64(3), yt_client) do |id|
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ids << id
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end
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youtube_pool << yt_client
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loop do
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yt_client = get_client(youtube_pool)
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if ids.empty?
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search(random.base64(3), yt_client) do |id|
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ids << id
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end
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end
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if rand(300) < 1
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youtube_pool << make_client(YT_URL, CONTEXT)
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yt_client = get_client(youtube_pool)
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end
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begin
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id = ids[0]
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video = get_video(id, yt_client, PG_DB)
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rescue ex
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io << id << " : " << ex.message << "\n"
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youtube_pool << make_client(YT_URL, CONTEXT)
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next
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ensure
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ids.delete(id)
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end
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rvs = [] of Hash(String, String)
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if video.info.has_key?("rvs")
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video.info["rvs"].split(",").each do |rv|
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rvs << HTTP::Params.parse(rv).to_h
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end
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end
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rvs.each do |rv|
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if rv.has_key?("id") && !PG_DB.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", rv["id"], as: Bool)
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ids.delete(id)
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ids << rv["id"]
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if ids.size == 150
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ids.shift
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end
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end
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end
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youtube_pool << yt_client
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sleep yt_wait.seconds
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end
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end
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end
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top_videos = [] of Video
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spawn do
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loop do
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top = rank_videos(PG_DB, 40)
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yt_client = get_client(youtube_pool)
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if top.size > 0
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args = arg_array(top)
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else
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next
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end
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videos = [] of Video
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PG_DB.query("SELECT * FROM videos d INNER JOIN (VALUES #{args}) v(id) USING (id)", top) do |rs|
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rs.each do
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video = rs.read(Video)
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videos << video
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end
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end
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top_videos = videos
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youtube_pool << yt_client
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end
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end
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macro templated(filename)
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render "src/views/#{{{filename}}}.ecr", "src/views/layout.ecr"
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end
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get "/" do |env|
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templated "index"
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end
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get "/watch" do |env|
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if env.params.query["v"]?
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id = env.params.query["v"]
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else
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env.redirect "/"
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next
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end
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listen = false
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if env.params.query["listen"]? && env.params.query["listen"] == "true"
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listen = true
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env.params.query.delete_all("listen")
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end
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yt_client = get_client(youtube_pool)
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begin
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video = get_video(id, yt_client, PG_DB)
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rescue ex
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error_message = ex.message
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next templated "error"
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ensure
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youtube_pool << yt_client
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end
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fmt_stream = [] of HTTP::Params
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video.info["url_encoded_fmt_stream_map"].split(",") do |string|
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fmt_stream << HTTP::Params.parse(string)
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end
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signature = false
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if fmt_stream[0]? && fmt_stream[0]["s"]?
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signature = true
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end
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# We want lowest quality first
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fmt_stream.reverse!
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adaptive_fmts = [] of HTTP::Params
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if video.info.has_key?("adaptive_fmts")
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video.info["adaptive_fmts"].split(",") do |string|
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adaptive_fmts << HTTP::Params.parse(string)
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end
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end
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if signature
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adaptive_fmts.each do |fmt|
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fmt["url"] += "&signature=" + decrypt_signature(fmt["s"])
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end
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fmt_stream.each do |fmt|
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fmt["url"] += "&signature=" + decrypt_signature(fmt["s"])
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end
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end
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rvs = [] of Hash(String, String)
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if video.info.has_key?("rvs")
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video.info["rvs"].split(",").each do |rv|
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rvs << HTTP::Params.parse(rv).to_h
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end
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end
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player_response = JSON.parse(video.info["player_response"])
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rating = video.info["avg_rating"].to_f64
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engagement = ((video.dislikes.to_f + video.likes.to_f)/video.views * 100)
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if video.likes > 0 || video.dislikes > 0
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calculated_rating = (video.likes.to_f/(video.likes.to_f + video.dislikes.to_f) * 4 + 1)
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else
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calculated_rating = 0.0
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end
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reddit_client = HTTP::Client.new(REDDIT_URL, CONTEXT)
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headers = HTTP::Headers{"User-Agent" => "web:invidio.us:v0.1.0 (by /u/omarroth)"}
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begin
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reddit_comments, reddit_thread = get_reddit_comments(id, reddit_client, headers)
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rescue ex
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reddit_comments = JSON.parse("[]")
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reddit_thread = nil
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end
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templated "watch"
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end
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get "/search" do |env|
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if env.params.query["q"]?
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query = env.params.query["q"]
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else
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env.redirect "/"
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next
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end
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page = env.params.query["page"]? && env.params.query["page"].to_i? ? env.params.query["page"].to_i : 1
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yt_client = get_client(youtube_pool)
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html = yt_client.get("https://www.youtube.com/results?q=#{URI.escape(query)}&page=#{page}&sp=EgIQAVAU").body
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html = XML.parse_html(html)
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videos = Array(Hash(String, String)).new
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html.xpath_nodes(%q(//ol[@class="item-section"]/li)).each do |item|
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root = item.xpath_node(%q(div[contains(@class,"yt-lockup-video")]/div))
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if root
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video = {} of String => String
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link = root.xpath_node(%q(div[contains(@class,"yt-lockup-thumbnail")]/a/@href))
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if link
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video["link"] = link.content
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else
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video["link"] = "#"
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end
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title = root.xpath_node(%q(div[@class="yt-lockup-content"]/h3/a))
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if title
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video["title"] = title.content
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else
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video["title"] = "Something went wrong"
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end
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thumbnail = root.xpath_node(%q(div[contains(@class,"yt-lockup-thumbnail")]/a/div/span/img/@src))
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if thumbnail && !thumbnail.content.ends_with?(".gif")
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video["thumbnail"] = thumbnail.content
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else
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thumbnail = root.xpath_node(%q(div[contains(@class,"yt-lockup-thumbnail")]/a/div/span/img/@data-thumb))
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if thumbnail
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video["thumbnail"] = thumbnail.content
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else
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video["thumbnail"] = "http://via.placeholder.com/246x138"
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end
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end
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author = root.xpath_node(%q(div[@class="yt-lockup-content"]/div/a))
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if author
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video["author"] = author.content
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video["author_url"] = author["href"]
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else
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video["author"] = ""
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video["author_url"] = ""
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end
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videos << video
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end
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end
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youtube_pool << yt_client
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templated "search"
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end
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get "/redirect" do |env|
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if env.params.query["q"]?
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env.redirect env.params.query["q"]
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else
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env.redirect "/"
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end
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end
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error 404 do |env|
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error_message = "404 Page not found"
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templated "error"
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end
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error 500 do |env|
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error_message = "500 Server error"
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templated "error"
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end
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public_folder "assets"
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Kemal.run
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