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# "Invidious" (which indexes popular video sites)
# 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 "kemal"
require "pg"
require "xml"
require "./helpers"
PG_DB = DB.open "postgres://kemal:kemal@localhost:5432/invidious"
URL = URI.parse("https://www.youtube.com")
CONTEXT = OpenSSL::SSL::Context::Client.new
CONTEXT.verify_mode = OpenSSL::SSL::VerifyMode::NONE
CONTEXT.add_options(
OpenSSL::SSL::Options::ALL |
OpenSSL::SSL::Options::NO_SSL_V2 |
OpenSSL::SSL::Options::NO_SSL_V3
)
POOL = Deque.new(30) do
client = HTTP::Client.new(URL, CONTEXT)
client.read_timeout = 5.seconds
client.connect_timeout = 5.seconds
client
end
# Refresh pool by crawling YT
10.times do
spawn do
io = STDOUT
ids = Deque(String).new
random = Random.new
client = get_client(POOL)
search(random.base64(3), client) do |id|
ids << id
end
loop do
if ids.empty?
search(random.base64(3), client) do |id|
ids << id
end
end
if rand(300) < 1
client = HTTP::Client.new(URL, CONTEXT)
client.read_timeout = 5.seconds
client.connect_timeout = 5.seconds
POOL << client
end
time = Time.now
begin
id = ids[0]
video = get_video(id, client, PG_DB, false)
rescue ex
io << id << " : " << ex << "\n"
client = HTTP::Client.new(URL, CONTEXT)
client.read_timeout = 5.seconds
client.connect_timeout = 5.seconds
POOL << client
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
io << Time.now << " 200 GET www.youtube.com/watch?v=" << video.id << " " << elapsed_text(Time.now - time) << "\n"
end
end
end
macro templated(filename)
render "src/views/#{{{filename}}}.ecr", "src/views/layout.ecr"
end
get "/" do |env|
templated "index"
end
get "/watch" do |env|
id = env.params.query["v"]
listen = env.params.query["listen"]? || "false"
env.params.query.delete_all("listen")
client = get_client(POOL)
begin
video = get_video(id, client, PG_DB)
rescue ex
error_message = ex.message
next templated "error"
end
fmt_stream = [] of HTTP::Params
video.info["url_encoded_fmt_stream_map"].split(",") do |string|
fmt_stream << HTTP::Params.parse(string)
end
fmt_stream.reverse! # We want lowest quality first
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
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"])
description = video.html.xpath_node(%q(//p[@id="eow-description"]))
description = description ? description.to_xml : "Could not load description"
rating = video.info["avg_rating"].to_f64
engagement = ((video.dislikes.to_f + video.likes.to_f)/video.views * 100)
calculated_rating = (video.likes.to_f/(video.likes.to_f + video.dislikes.to_f) * 4 + 1)
templated "watch"
end
get "/search" do |env|
query = env.params.query["q"]
page = env.params.query["page"]? && env.params.query["page"].to_i? ? env.params.query["page"].to_i : 1
client = get_client(POOL)
html = client.get("https://www.youtube.com/results?q=#{URI.escape(query)}&page=#{page}&sp=EgIQAVAU").body
html = XML.parse_html(html)
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"] = "http://via.placeholder.com/246x138"
end
end
videos << video
end
end
POOL << client
templated "search"
end
error 404 do |env|
templated "index"
end
error 500 do |env|
templated "index"
end
public_folder "assets"
Kemal.run
|
