invidious/src/invidious.cr
2018-03-17 00:02:02 -05:00

558 lines
16 KiB
Crystal

# "Invidious" (which is what YouTube should be)
# 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/>.
require "detect_language"
require "kemal"
require "option_parser"
require "pg"
require "xml"
require "yaml"
require "./helpers"
require "./cookie_fix"
CONFIG = Config.from_yaml(File.read("config/config.yml"))
pool_size = CONFIG.pool_size
threads = CONFIG.threads
Kemal.config.extra_options do |parser|
parser.banner = "Usage: invidious [arguments]"
parser.on("-z SIZE", "--youtube-pool=SIZE", "Number of clients in youtube pool (default: #{pool_size})") do |number|
begin
pool_size = number.to_i
rescue ex
puts "SIZE must be integer"
exit
end
end
parser.on("-t THREADS", "--youtube-threads=THREADS", "Number of threads for crawling (default: #{threads})") do |number|
begin
threads = number.to_i
rescue ex
puts "THREADS must be integer"
exit
end
end
end
Kemal::CLI.new
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")
LOGIN_URL = URI.parse("https://accounts.google.com")
youtube_pool = Deque.new(pool_size) do
make_client(YT_URL)
end
# Refresh youtube_pool by crawling YT
threads.times do
spawn do
ids = Deque(String).new
random = Random.new
client = get_client(youtube_pool)
search(random.base64(3), client) do |id|
ids << id
end
youtube_pool << client
loop do
client = get_client(youtube_pool)
if ids.empty?
search(random.base64(3), client) do |id|
ids << id
end
end
begin
id = ids[0]
video = get_video(id, client, PG_DB)
rescue ex
STDOUT << id << " : " << ex.message << "\n"
youtube_pool << make_client(YT_URL)
next
ensure
ids.delete(id)
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
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)
ids << rv["id"]
if ids.size == 150
ids.shift
end
end
end
youtube_pool << client
end
end
end
top_videos = [] of Video
spawn do
if CONFIG.dl_api_key
DetectLanguage.configure do |config|
config.api_key = CONFIG.dl_api_key.not_nil!
end
filter = true
else
filter = false
end
loop do
top = rank_videos(PG_DB, 40, youtube_pool, filter)
if top.size > 0
args = arg_array(top)
else
next
end
videos = [] of Video
top.each do |id|
client = get_client(youtube_pool)
begin
videos << get_video(id, client, PG_DB)
rescue ex
end
youtube_pool << client
end
top_videos = videos
Fiber.yield
end
end
get "/" do |env|
templated "index"
end
get "/watch" do |env|
if env.params.query["v"]?
id = env.params.query["v"]
else
env.redirect "/"
next
end
listen = false
if env.params.query["listen"]? && env.params.query["listen"] == "true"
listen = true
env.params.query.delete_all("listen")
end
yt_client = get_client(youtube_pool)
begin
video = get_video(id, yt_client, PG_DB)
rescue ex
error_message = ex.message
next templated "error"
ensure
youtube_pool << yt_client
end
fmt_stream = [] of HTTP::Params
video.info["url_encoded_fmt_stream_map"].split(",") do |string|
if !string.empty?
fmt_stream << HTTP::Params.parse(string)
end
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
end
signature = false
if adaptive_fmts[0]? && adaptive_fmts[0]["s"]?
signature = true
end
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
fmt_stream = fmt_stream.uniq { |s| s["quality"] }
video_streams = adaptive_fmts.compact_map { |s| s["type"].starts_with?("video") ? s : nil }
video_streams = video_streams.uniq { |s| s["size"] }
audio_streams = adaptive_fmts.compact_map { |s| s["type"].starts_with?("audio") ? s : nil }
audio_streams.sort_by! { |s| s["bitrate"].to_i }.reverse!
audio_streams.each do |fmt|
fmt["bitrate"] = (fmt["bitrate"].to_f64/1000).to_i.to_s
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
player_response = JSON.parse(video.info["player_response"])
rating = video.info["avg_rating"].to_f64
engagement = ((video.dislikes.to_f + video.likes.to_f)/video.views * 100)
if video.likes > 0 || video.dislikes > 0
calculated_rating = (video.likes.to_f/(video.likes.to_f + video.dislikes.to_f) * 4 + 1)
else
calculated_rating = 0.0
end
reddit_client = make_client(REDDIT_URL)
headers = HTTP::Headers{"User-Agent" => "web:invidio.us:v0.1.0 (by /u/omarroth)"}
begin
reddit_comments, reddit_thread = get_reddit_comments(id, reddit_client, headers)
reddit_html = template_comments(reddit_comments)
reddit_html = add_alt_links(reddit_html)
rescue ex
reddit_thread = nil
reddit_html = ""
end
video.description = fill_links(video.description, "https", "www.youtube.com")
video.description = add_alt_links(video.description)
thumbnail = player_response["videoDetails"]["thumbnail"]["thumbnails"][-1]["url"]?
templated "watch"
end
get "/search" do |env|
if env.params.query["q"]?
query = env.params.query["q"]
else
env.redirect "/"
next
end
page = env.params.query["page"]?.try &.to_i
page ||= 1
client = get_client(youtube_pool)
html = client.get("/results?q=#{URI.escape(query)}&page=#{page}&sp=EgIQAVAU").body
html = XML.parse_html(html)
youtube_pool << client
videos = Array(Hash(String, String)).new
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
link = root.xpath_node(%q(div[contains(@class,"yt-lockup-thumbnail")]/a/@href))
if link
video["link"] = link.content
else
video["link"] = "#"
end
title = root.xpath_node(%q(div[@class="yt-lockup-content"]/h3/a))
if title
video["title"] = title.content
else
video["title"] = "Something went wrong"
end
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"
end
end
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
videos << video
end
end
templated "search"
end
get "/login" do |env|
templated "login"
end
# See https://github.com/rg3/youtube-dl/blob/master/youtube_dl/extractor/youtube.py#L79
post "/login" do |env|
email = env.params.body["email"]?
password = env.params.body["password"]?
remember = env.params.body["remember"]? || "false"
begin
client = make_client(LOGIN_URL)
headers = HTTP::Headers.new
login_page = client.get("/ServiceLogin")
headers = login_page.cookies.add_request_headers(headers)
login_page = XML.parse_html(login_page.body)
inputs = {} of String => String
login_page.xpath_nodes(%q(//input[@type="submit"])).each do |node|
name = node["id"]? || node["name"]?
name ||= ""
value = node["value"]?
value ||= ""
if name != "" && value != ""
inputs[name] = value
end
end
login_page.xpath_nodes(%q(//input[@type="hidden"])).each do |node|
name = node["id"]? || node["name"]?
name ||= ""
value = node["value"]?
value ||= ""
if name != "" && value != ""
inputs[name] = value
end
end
lookup_req = %(["#{email}","#{inputs["session-state"]}",[],null,"US",null,null,2,false,true,[null,null,[2,1,null,1,"https://accounts.google.com/ServiceLogin?passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Fnext%3D%252F%26action_handle_signin%3Dtrue%26hl%3Den%26app%3Ddesktop%26feature%3Dsign_in_button&hl=en&service=youtube&uilel=3&requestPath=%2FServiceLogin&Page=PasswordSeparationSignIn",null,[],4,[]],1,[null,null,[]],null,null,null,true],"#{email}"])
headers["Content-Type"] = "application/x-www-form-urlencoded;charset=utf-8"
headers["Google-Accounts-XSRF"] = "1"
lookup_results = client.post("/_/signin/sl/lookup", headers, login_req(inputs, lookup_req))
headers = lookup_results.cookies.add_request_headers(headers)
lookup_results = lookup_results.body
lookup_results = lookup_results[5..-1]
lookup_results = JSON.parse(lookup_results)
user_hash = lookup_results[0][2]
challenge_req = %([#{user_hash},null,1,null,[1,null,null,null,[#{password},null,true]],[null,null,[2,1,null,1,"https://accounts.google.com/ServiceLogin?passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Fnext%3D%252F%26action_handle_signin%3Dtrue%26hl%3Den%26app%3Ddesktop%26feature%3Dsign_in_button&hl=en&service=youtube&uilel=3&requestPath=%2FServiceLogin&Page=PasswordSeparationSignIn", null,[],4],1,[null,null,[]],null,null,null,true]])
challenge_results = client.post("/_/signin/sl/challenge", headers, login_req(inputs, challenge_req))
headers = challenge_results.cookies.add_request_headers(headers)
challenge_results = challenge_results.body
challenge_results = challenge_results[5..-1]
challenge_results = JSON.parse(challenge_results)
login_res = challenge_results[0][13][2].to_s
login = client.get(login_res, headers)
headers = login.cookies.add_request_headers(headers)
login = client.get(login.headers["Location"], headers)
headers = login.cookies.add_request_headers(headers)
# We are now logged in
env.redirect "/"
rescue ex
error_message = "Login failed"
next templated "error"
end
end
get "/redirect" do |env|
if env.params.query["q"]?
env.redirect env.params.query["q"]
else
env.redirect "/"
end
end
# 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
signature = false
if adaptive_fmts[0]? && adaptive_fmts[0]["s"]?
signature = true
end
if signature
adaptive_fmts.each do |fmt|
fmt["url"] += "&signature=" + decrypt_signature(fmt["s"])
end
end
video_streams = adaptive_fmts.compact_map { |s| s["type"].starts_with?("video/mp4") ? s : nil }
audio_streams = adaptive_fmts.compact_map { |s| s["type"].starts_with?("audio/mp4") ? s : nil }
audio_streams.sort_by! { |s| s["bitrate"].to_i }.reverse!
audio_streams.each do |fmt|
fmt["bitrate"] = (fmt["bitrate"].to_f64/1000).to_i.to_s
end
manifest = XML.build(indent: " ", encoding: "UTF-8") do |xml|
xml.element("MPD", "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance", "xsi:schemaLocation": "urn:mpeg:DASH:schema:MPD:2011 DASH-MPD.xsd",
xmlns: "urn:mpeg:dash:schema:mpd:2011", profiles: "urn:mpeg:dash:profile:isoff-main:2011",
mediaPresentationDuration: "PT#{video.info["length_seconds"]}S", minBufferTime: "PT2S", type: "static") do
xml.element("Period") do
xml.element("AdaptationSet", id: 0, mimeType: "audio/mp4", subsegmentAlignment: true) do
xml.element("Role", schemeIdUri: "urn:mpeg:DASH:role:2011", value: "main")
audio_streams.each do |fmt|
mimetype, codecs = fmt["type"].split(";")
codecs = codecs[9..-2]
fmt_type = mimetype.split("/")[0]
bandwidth = fmt["bitrate"]
itag = fmt["itag"]
url = fmt["url"]
xml.element("Representation", id: fmt["itag"], codecs: codecs, bandwidth: bandwidth) do
xml.element("BaseURL") { xml.text url }
xml.element("SegmentBase", indexRange: fmt["init"]) do
xml.element("Initialization", range: fmt["index"])
end
end
end
end
xml.element("AdaptationSet", id: 1, mimeType: "video/mp4", subsegmentAlignment: true) do
xml.element("Role", schemeIdUri: "urn:mpeg:DASH:role:2011", value: "main")
video_streams.each do |fmt|
mimetype, codecs = fmt["type"].split(";")
codecs = codecs[9..-2]
fmt_type = mimetype.split("/")[0]
bandwidth = fmt["bitrate"]
itag = fmt["itag"]
url = fmt["url"]
height, width = fmt["size"].split("x")
xml.element("Representation", id: itag, codecs: codecs, width: width, height: height, bandwidth: bandwidth, frameRate: fmt["fps"]) 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
manifest = manifest.gsub(%(<?xml version="1.0" encoding="UTF-8U"?>), %(<?xml version="1.0" encoding="UTF-8"?>))
manifest = manifest.gsub(%(<?xml version="1.0" encoding="UTF-8V"?>), %(<?xml version="1.0" encoding="UTF-8"?>))
manifest
end
error 404 do |env|
error_message = "404 Page not found"
templated "error"
end
error 500 do |env|
error_message = "500 Server error"
templated "error"
end
# Add redirect if SSL is enabled
if Kemal.config.ssl
spawn do
server = HTTP::Server.new("0.0.0.0", 80) do |context|
redirect_url = "https://#{context.request.host}#{context.request.path}"
if context.request.query
redirect_url += "?#{context.request.query}"
end
context.response.headers.add("Location", redirect_url)
context.response.status_code = 301
end
server.listen
end
before_all do |env|
env.response.headers.add("Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload")
end
end
static_headers do |response, filepath, filestat|
response.headers.add("Cache-Control", "max-age=86400")
end
public_folder "assets"
Kemal.run