invidious/src/invidious.cr

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# "Invidious" (which is what YouTube should be)
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# Copyright (C) 2018 Omar Roth
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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require "kemal"
require "option_parser"
require "pg"
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require "xml"
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require "yaml"
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require "./helpers"
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CONFIG = Config.from_yaml(File.read("config/config.yml"))
pool_size = CONFIG.pool_size
threads = CONFIG.threads
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redirect = CONFIG.redirect
Kemal.config.extra_options do |parser|
parser.banner = "Usage: invidious [arguments]"
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parser.on("-z SIZE", "--youtube-pool=SIZE", "Number of clients in youtube pool (default: #{pool_size})") do |number|
begin
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pool_size = number.to_i
rescue ex
puts "SIZE must be integer"
exit
end
end
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parser.on("-t THREADS", "--youtube-threads=THREADS", "Number of threads for crawling (default: #{threads})") do |number|
begin
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threads = number.to_i
rescue ex
puts "THREADS must be integer"
exit
end
end
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parser.on("-r REDIRECT", "--redirect=BOOL", "Whether insecure requests should be forced to HTTPS, requires -s (default #{redirect})") do |boolean|
if boolean == "true"
redirect = true
elsif boolean == "false"
redirect = false
else
puts "REDIRECT must be 'true' or 'false'"
exit
end
end
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end
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Kemal::CLI.new
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PG_URL = URI.new(
scheme: "postgres",
user: CONFIG.db[:user],
password: CONFIG.db[:password],
host: CONFIG.db[:host],
port: CONFIG.db[:port],
path: CONFIG.db[:dbname],
)
PG_DB = DB.open PG_URL
YT_URL = URI.parse("https://www.youtube.com")
REDDIT_URL = URI.parse("https://api.reddit.com")
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youtube_pool = Deque.new(pool_size) do
make_client(YT_URL)
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end
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# Refresh youtube_pool by crawling YT
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threads.times do
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spawn do
ids = Deque(String).new
random = Random.new
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client = get_client(youtube_pool)
search(random.base64(3), client) do |id|
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ids << id
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end
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youtube_pool << client
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loop do
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client = get_client(youtube_pool)
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if ids.empty?
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search(random.base64(3), client) do |id|
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ids << id
end
end
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begin
id = ids[0]
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video = get_video(id, client, PG_DB)
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rescue ex
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STDOUT << id << " : " << ex.message << "\n"
youtube_pool << make_client(YT_URL)
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next
ensure
ids.delete(id)
end
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rvs = [] of Hash(String, String)
if video.info.has_key?("rvs")
video.info["rvs"].split(",").each do |rv|
rvs << HTTP::Params.parse(rv).to_h
end
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end
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rvs.each do |rv|
if rv.has_key?("id") && !PG_DB.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", rv["id"], as: Bool)
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
end
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end
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youtube_pool << client
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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
loop do
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top = rank_videos(PG_DB, 40)
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if top.size > 0
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args = arg_array(top)
else
next
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|
rs.each do
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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Fiber.yield
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end
end
get "/" do |env|
templated "index"
end
get "/watch" do |env|
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if env.params.query["v"]?
id = env.params.query["v"]
else
env.redirect "/"
next
end
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listen = false
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if env.params.query["listen"]? && env.params.query["listen"] == "true"
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)
begin
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video = get_video(id, yt_client, PG_DB)
rescue ex
error_message = ex.message
next templated "error"
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ensure
youtube_pool << yt_client
end
fmt_stream = [] of HTTP::Params
video.info["url_encoded_fmt_stream_map"].split(",") do |string|
fmt_stream << HTTP::Params.parse(string)
end
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signature = false
if fmt_stream[0]? && fmt_stream[0]["s"]?
signature = true
end
# We want lowest quality first
fmt_stream.reverse!
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adaptive_fmts = [] of HTTP::Params
if video.info.has_key?("adaptive_fmts")
video.info["adaptive_fmts"].split(",") do |string|
adaptive_fmts << HTTP::Params.parse(string)
end
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end
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if signature
adaptive_fmts.each do |fmt|
fmt["url"] += "&signature=" + decrypt_signature(fmt["s"])
end
fmt_stream.each do |fmt|
fmt["url"] += "&signature=" + decrypt_signature(fmt["s"])
end
end
rvs = [] of Hash(String, String)
if video.info.has_key?("rvs")
video.info["rvs"].split(",").each do |rv|
rvs << HTTP::Params.parse(rv).to_h
end
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
calculated_rating = (video.likes.to_f/(video.likes.to_f + video.dislikes.to_f) * 4 + 1)
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else
calculated_rating = 0.0
end
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reddit_client = make_client(REDDIT_URL)
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headers = HTTP::Headers{"User-Agent" => "web:invidio.us:v0.1.0 (by /u/omarroth)"}
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begin
reddit_comments, reddit_thread = get_reddit_comments(id, reddit_client, headers)
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reddit_html = template_comments(reddit_comments)
reddit_html = add_alt_links(reddit_html)
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rescue ex
reddit_thread = nil
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reddit_html = ""
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end
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video.description = fill_links(video.description, "https", "www.youtube.com")
video.description = add_alt_links(video.description)
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thumbnail = player_response["videoDetails"]["thumbnail"]["thumbnails"][-1]["url"]?
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templated "watch"
end
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get "/search" do |env|
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if env.params.query["q"]?
query = env.params.query["q"]
else
env.redirect "/"
next
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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client = get_client(youtube_pool)
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html = client.get("/results?q=#{URI.escape(query)}&page=#{page}&sp=EgIQAVAU").body
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html = XML.parse_html(html)
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youtube_pool << client
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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|
root = item.xpath_node(%q(div[contains(@class,"yt-lockup-video")]/div))
if root
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
video["link"] = link.content
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else
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
video["title"] = title.content
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else
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))
if thumbnail && !thumbnail.content.ends_with?(".gif")
video["thumbnail"] = thumbnail.content
else
thumbnail = root.xpath_node(%q(div[contains(@class,"yt-lockup-thumbnail")]/a/div/span/img/@data-thumb))
if thumbnail
video["thumbnail"] = thumbnail.content
else
video["thumbnail"] = "https://dummyimage.com/246x138"
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end
end
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author = root.xpath_node(%q(div[@class="yt-lockup-content"]/div/a))
if author
video["author"] = author.content
video["author_url"] = author["href"]
else
video["author"] = ""
video["author_url"] = ""
end
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videos << video
end
end
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templated "search"
end
get "/redirect" do |env|
if env.params.query["q"]?
env.redirect env.params.query["q"]
else
env.redirect "/"
end
end
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# Return dash manifest for the given video ID
get "/api/manifest/dash/id/:id" do |env|
env.response.headers.add("Access-Control-Allow-Origin", "*")
env.response.content_type = "application/dash+xml"
id = env.params.url["id"]
yt_client = get_client(youtube_pool)
begin
video = get_video(id, yt_client, PG_DB)
rescue ex
halt env, status_code: 403
ensure
youtube_pool << yt_client
end
adaptive_fmts = [] of HTTP::Params
if video.info.has_key?("adaptive_fmts")
video.info["adaptive_fmts"].split(",") do |string|
adaptive_fmts << HTTP::Params.parse(string)
end
else
halt env, status_code: 403
end
manifest = XML.build(indent: " ") do |xml|
xml.element("MPD", xmlns: "urn:mpeg:dash:schema:mpd:2011", profiles: "urn:mpeg:dash:profile:full:2011",
mediaPresentationDuration: "PT#{video.info["length_seconds"]}S", minBufferTime: "PT2S", type: "static") do
host = URI.parse(adaptive_fmts[0]["url"]).host.to_s
xml.element("BaseURL") { xml.text "https://#{host}" }
xml.element("Period", id: "0") do
adaptive_fmts.each do |fmt|
mimetype, codecs = fmt["type"].split(";")
codecs = codecs[9..-2]
fmt_type = mimetype.split("/")[0]
fmt_id = fmt["itag"]
bandwidth = fmt["bitrate"]
url = fmt["url"]
if fmt["s"]?
url += "&signature="
url += decrypt_signature(fmt["s"])
end
url = URI.parse(url)
url = url.path.not_nil! + "?" + url.query.not_nil!
if fmt_type == "video"
width, height = fmt["size"].split("x")
framerate = fmt["fps"]
xml.element("AdaptationSet", contentType: "video", width: width,
height: height, frameRate: framerate, subsegmentAlignment: true, id: fmt_id) do
xml.element("Representation", id: fmt_id, bandwidth: bandwidth, codecs: codecs, mimeType: mimetype) do
xml.element("BaseURL") { xml.text url }
xml.element("SegmentBase", indexRange: fmt["init"]) do
xml.element("Initialization", range: fmt["index"])
end
end
end
else
xml.element("AdaptationSet", contentType: "audio", subsegmentAlignment: true, id: fmt_id) do
xml.element("Representation", id: fmt_id, bandwidth: bandwidth, codecs: codecs, mimeType: mimetype) do
xml.element("BaseURL") { xml.text url }
xml.element("SegmentBase", indexRange: fmt["init"]) do
xml.element("Initialization", range: fmt["index"])
end
end
end
end
end
end
end
end
manifest
end
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error 404 do |env|
error_message = "404 Page not found"
templated "error"
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end
error 500 do |env|
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error_message = "500 Server error"
templated "error"
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end
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# Add redirect if SSL is enabled and redirect is enabled
if Kemal.config.ssl && redirect
spawn do
server = HTTP::Server.new("0.0.0.0", 80) do |context|
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redirect_url = "https://#{context.request.host}#{context.request.path}"
if context.request.query
redirect_url += "?#{context.request.query}"
end
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context.response.headers.add("Location", redirect_url)
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context.response.status_code = 301
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end
server.listen
end
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before_all do |env|
env.response.headers.add("Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload")
end
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end
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static_headers do |response, filepath, filestat|
response.headers.add("Cache-Control", "max-age=86400")
end
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public_folder "assets"
Kemal.run