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Move functions into helpers.cr
This commit is contained in:
Omar Roth
parent
cf49306ffb
commit
236fdb85ff
112
src/helpers.cr
112
src/helpers.cr
@ -1,7 +1,57 @@
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class Video
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module HTTPParamConverter
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def self.from_rs(rs)
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HTTP::Params.parse(rs.read(String))
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end
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end
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module XMLConverter
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def self.from_rs(rs)
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XML.parse_html(rs.read(String))
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end
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end
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def initialize(id, info, html, updated, title, views, likes, dislikes, wilson_score)
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@id = id
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@info = info
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@html = html
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@updated = updated
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@title = title
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@views = views
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@likes = likes
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@dislikes = dislikes
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@wilson_score = wilson_score
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end
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def to_a
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return [@id, @info, @html, @updated, @title, @views, @likes, @dislikes, @wilson_score]
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end
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DB.mapping({
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id: String,
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info: {
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type: HTTP::Params,
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default: HTTP::Params.parse(""),
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converter: Video::HTTPParamConverter,
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},
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html: {
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type: XML::Node,
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default: XML.parse_html(""),
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converter: Video::XMLConverter,
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},
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updated: Time,
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title: String,
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views: Int64,
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likes: Int32,
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dislikes: Int32,
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wilson_score: Float64,
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})
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end
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# See http://www.evanmiller.org/how-not-to-sort-by-average-rating.html
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def ci_lower_bound(pos, n)
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if n == 0
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return 0
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return 0.0
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end
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# z value here represents a confidence level of 0.95
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@ -18,57 +68,67 @@ def elapsed_text(elapsed)
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"#{(millis * 1000).round(2)}µs"
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end
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def get_client
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while POOL.empty?
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def get_client(pool)
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while pool.empty?
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sleep rand(0..10).milliseconds
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end
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return POOL.shift
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return pool.shift
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end
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def fetch_video(id)
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# Grab connection from pool
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client = get_client
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def fetch_video(id, client)
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begin
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info = client.get("/get_video_info?video_id=#{id}&el=detailpage&ps=default&eurl=&gl=US&hl=en").body
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info = HTTP::Params.parse(info)
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html = client.get("/watch?v=#{id}").body
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end
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html = XML.parse_html(html)
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info = HTTP::Params.parse(info)
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if info["reason"]?
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raise info["reason"]
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end
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# Return connection to pool
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POOL << client
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title = info["title"]
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video = Video.new(id, info, html, Time.now)
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views = info["view_count"].to_i64
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likes = html.xpath_node(%q(//button[@title="I like this"]/span))
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likes = likes ? likes.content.delete(",").to_i : 1
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dislikes = html.xpath_node(%q(//button[@title="I dislike this"]/span))
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dislikes = dislikes ? dislikes.content.delete(",").to_i : 0
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wilson_score = ci_lower_bound(likes, likes + dislikes)
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video = Video.new(id, info, html, Time.now, title, views, likes, dislikes, wilson_score)
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return video
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end
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def get_video(id, refresh = true)
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if PG_DB.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", id, as: Bool)
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video = PG_DB.query_one("SELECT * FROM videos WHERE id = $1", id, as: Video)
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def get_video(id, client, db, refresh = true)
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if db.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", id, as: Bool)
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video = db.query_one("SELECT * FROM videos WHERE id = $1", id, as: Video)
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# If record was last updated more than 5 hours ago, refresh (expire param in response lasts for 6 hours)
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if refresh && Time.now - video.updated > Time::Span.new(0, 5, 0, 0)
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video = fetch_video(id)
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PG_DB.exec("UPDATE videos SET info = $2, html = $3, updated = $4 WHERE id = $1", video.to_a)
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# If record was last updated over an hour ago, refresh (expire param in response lasts for 6 hours)
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if refresh && Time.now - video.updated > 1.hours
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video = fetch_video(id, client)
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db.exec("UPDATE videos SET info = $2, html = $3, updated = $4,\
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title = $5, views = $6, likes = $7, dislikes = $8, wilson_score = $9 WHERE id = $1", video.to_a)
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end
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else
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video = fetch_video(id)
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PG_DB.exec("INSERT INTO videos VALUES ($1, $2, $3, $4)", video.to_a)
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video = fetch_video(id, client)
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db.exec("INSERT INTO videos VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)", video.to_a)
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end
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return video
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end
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def search(query)
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client = get_client
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def search(query, client)
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begin
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html = client.get("https://www.youtube.com/results?q=#{query}&sp=EgIQAVAU").body
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end
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html = XML.parse_html(html)
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html.xpath_nodes(%q(//ol[@class="item-section"]/li)).each do |item|
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@ -80,6 +140,4 @@ def search(query)
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end
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end
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end
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POOL << client
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end
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107
src/invidious.cr
107
src/invidious.cr
@ -1,8 +1,5 @@
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require "http/client"
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require "json"
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require "kemal"
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require "pg"
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require "time"
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require "xml"
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require "./helpers"
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@ -17,44 +14,51 @@ CONTEXT.add_options(
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)
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POOL = Deque.new(30) do
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client = HTTP::Client.new(URL, CONTEXT)
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client.connect_timeout = Time::Span.new(0, 0, 0, 5)
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client.read_timeout = 5.seconds
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client.connect_timeout = 5.seconds
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client
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end
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# Refresh connections by crawling YT
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# Refresh pool by crawling YT
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10.times do
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spawn do
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# Start video
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ids = Deque.new(10, "_wbqqI0IgY8")
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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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client = get_client(POOL)
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search(random.base64(3)) do |id|
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search(random.base64(3), client) do |id|
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ids << id
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end
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loop do
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if ids.size < 5
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search(random.base64) do |id|
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if ids.empty?
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search(random.base64(3), client) do |id|
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ids << id
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puts "refreshed ids"
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end
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end
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if rand(600) < 1
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client = get_client
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if rand(300) < 1
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client = HTTP::Client.new(URL, CONTEXT)
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client.connect_timeout = Time::Span.new(0, 0, 0, 5)
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client.read_timeout = 5.seconds
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client.connect_timeout = 5.seconds
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POOL << client
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end
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time = Time.now
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begin
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id = ids[rand(ids.size)]
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video = get_video(id, false)
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ids.delete(id)
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id = ids[0]
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video = get_video(id, client, PG_DB, false)
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rescue ex
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puts ex
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io << id << " : " << ex << "\n"
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client = HTTP::Client.new(URL, CONTEXT)
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client.read_timeout = 5.seconds
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client.connect_timeout = 5.seconds
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POOL << client
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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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@ -65,17 +69,17 @@ spawn do
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end
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rvs.each do |rv|
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if rv.has_key?("id")
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if !PG_DB.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", rv["id"], as: Bool)
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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 == 50
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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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end
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puts "#{Time.now} 200 GET www.youtube.com/watch?v=#{video.id} #{elapsed_text(Time.now - time)}"
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io << Time.now << " 200 GET www.youtube.com/watch?v=" << video.id << " " << elapsed_text(Time.now - time) << "\n"
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end
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end
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end
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@ -83,46 +87,6 @@ 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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class Video
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module HTTPParamConverter
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def self.from_rs(rs)
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HTTP::Params.parse(rs.read(String))
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end
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end
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module XMLConverter
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def self.from_rs(rs)
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XML.parse_html(rs.read(String))
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end
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end
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def initialize(id, info, html, updated)
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@id = id
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@info = info
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@html = html
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@updated = updated
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end
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def to_a
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return [@id, @info, @html, @updated]
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end
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DB.mapping({
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id: String,
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info: {
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type: HTTP::Params,
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default: HTTP::Params.parse(""),
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converter: Video::HTTPParamConverter,
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},
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html: {
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type: XML::Node,
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default: XML.parse_html(""),
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converter: Video::XMLConverter,
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},
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updated: Time,
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})
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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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@ -133,8 +97,9 @@ get "/watch" do |env|
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env.params.query.delete_all("listen")
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client = get_client(POOL)
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begin
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video = get_video(id)
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video = get_video(id, 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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@ -153,6 +118,7 @@ get "/watch" do |env|
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adaptive_fmts << HTTP::Params.parse(string)
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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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@ -162,20 +128,13 @@ get "/watch" do |env|
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player_response = JSON.parse(video.info["player_response"])
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likes = video.html.xpath_node(%q(//button[@title="I like this"]/span))
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likes = likes ? likes.content.delete(",").to_i : 1
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dislikes = video.html.xpath_node(%q(//button[@title="I dislike this"]/span))
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dislikes = dislikes ? dislikes.content.delete(",").to_i : 1
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description = video.html.xpath_node(%q(//p[@id="eow-description"]))
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description = description ? description.to_xml : "Could not load description"
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views = video.info["view_count"].to_i64
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rating = video.info["avg_rating"].to_f64
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engagement = ((dislikes.to_f + likes.to_f)/views * 100)
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calculated_rating = (likes.to_f/(likes.to_f + dislikes.to_f) * 4 + 1)
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engagement = ((video.dislikes.to_f + video.likes.to_f)/video.views * 100)
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calculated_rating = (video.likes.to_f/(video.likes.to_f + video.dislikes.to_f) * 4 + 1)
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templated "watch"
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end
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@ -184,7 +143,7 @@ get "/search" do |env|
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query = env.params.query["q"]
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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
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client = get_client(POOL)
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html = 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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