invidious/src/invidious.cr
2018-01-20 18:19:55 -06:00

223 lines
5.3 KiB
Crystal

require "http/client"
require "json"
require "kemal"
require "pg"
require "time"
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.connect_timeout = Time::Span.new(0, 0, 0, 5)
client
end
# Refresh all the connections in the pool by crawling recommended
spawn do
# Arbitrary start value
id = Deque.new(50, "0xjKNDMgE54")
loop do
client = get_client
if rand(100) < 1
client = HTTP::Client.new(URL, CONTEXT)
client.connect_timeout = Time::Span.new(0, 0, 0, 5)
end
time = Time.now
begin
video = get_video(id[rand(id.size)], false)
rescue ex
puts ex
POOL << client
next
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")
id << rv["id"]
id.shift
end
end
POOL << client
puts "#{Time.now} 200 GET youtube.com/watch?v=#{video.id} #{elapsed_text(Time.now - time)}"
end
end
macro templated(filename)
render "src/views/#{{{filename}}}.ecr", "src/views/layout.ecr"
end
class Video
module HTTPParamConverter
def self.from_rs(rs)
HTTP::Params.parse(rs.read(String))
end
end
module XMLConverter
def self.from_rs(rs)
XML.parse_html(rs.read(String))
end
end
def initialize(id, info, html, updated)
@id = id
@info = info
@html = html
@updated = updated
end
def to_a
return [@id, @info, @html, @updated]
end
DB.mapping({
id: String,
info: {
type: HTTP::Params,
default: HTTP::Params.parse(""),
converter: Video::HTTPParamConverter,
},
html: {
type: XML::Node,
default: XML.parse_html(""),
converter: Video::XMLConverter,
},
updated: Time,
})
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")
begin
video = get_video(id)
rescue ex
error_message = ex.message
next templated "error"
end
player_response = JSON.parse(video.info["player_response"])
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
video.info["adaptive_fmts"].split(",") do |string|
adaptive_fmts << HTTP::Params.parse(string)
end
likes = video.html.xpath_node(%q(//button[@title="I like this"]/span))
likes = likes ? likes.content.delete(",").to_i : 1
dislikes = video.html.xpath_node(%q(//button[@title="I dislike this"]/span))
dislikes = dislikes ? dislikes.content.delete(",").to_i : 1
description = video.html.xpath_node(%q(//p[@id="eow-description"]))
description = description ? description.to_xml : "Could not load description"
views = video.info["view_count"].to_i64
rating = video.info["avg_rating"].to_f64
engagement = ((dislikes.to_f + likes.to_f)/views * 100)
calculated_rating = (likes.to_f/(likes.to_f + dislikes.to_f) * 4 + 1)
rvs = [] of Hash(String, String)
video.info["rvs"].split(",").each do |rv|
rvs << HTTP::Params.parse(rv).to_h
end
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
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