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Adds description, video class, wilson score...
This commit is contained in:
Omar Roth
parent
5d48215a5f
commit
f7f5f91316
1 changed files with 135 additions and 77 deletions
212
src/invidious.cr
212
src/invidious.cr
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@ -5,41 +5,34 @@ require "pg"
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require "xml"
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require "time"
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class AdaptiveFmts
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JSON.mapping(
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clen: Int32,
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url: String,
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lmt: Int64,
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index: String,
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fps: Int32,
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itag: Int32,
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projection_type: Int32,
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size: String,
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init: String,
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quality_label: String,
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bitrate: Int32,
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type: String
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)
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end
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# Get rid of everything except video_info, video_html, video_id
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class URLEncodedFmtStreamMap
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JSON.mapping(
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url: String,
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itag: Int32,
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fallback_host: String,
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quality: String,
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type: String
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)
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end
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# class AdaptiveFmts
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# JSON.mapping(
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# clen: Int32,
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# url: String,
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# lmt: Int64,
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# index: String,
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# fps: Int32,
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# itag: Int32,
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# projection_type: Int32,
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# size: String,
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# init: String,
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# quality_label: String,
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# bitrate: Int32,
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# type: String
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# )
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# end
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class CaptionTracks
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JSON.mapping(
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v: String,
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lc: String,
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t: String,
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u: String
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)
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end
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# class URLEncodedFmtStreamMap
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# JSON.mapping(
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# url: String,
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# itag: Int32,
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# fallback_host: String,
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# quality: String,
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# type: String
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# )
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# end
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class CaptionTranslationLanguages
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JSON.mapping(
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@ -129,68 +122,131 @@ 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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pg = DB.open "postgres://kemal:kemal@localhost:5432/invidious"
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context = OpenSSL::SSL::Context::Client.insecure
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class Video
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getter last_updated : Time
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getter video_id : String
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getter video_info : String
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getter video_html : String
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getter views : String
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getter likes : Int32
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getter dislikes : Int32
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getter rating : Float64
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getter description : String
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get "/" do |env|
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templated "index"
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def initialize(last_updated, video_id, video_info, video_html, views, likes, dislikes, rating, description)
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@last_updated = last_updated
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@video_id = video_id
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@video_info = video_info
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@video_html = video_html
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@views = views
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@likes = likes
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@dislikes = dislikes
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@rating = rating
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@description = description
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end
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def to_a
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return [@last_updated, @video_id, @video_info, @video_html, @views, @likes, @dislikes, @rating, @description]
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end
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DB.mapping({
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last_updated: Time,
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video_id: String,
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video_info: String,
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video_html: String,
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views: Int64,
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likes: Int32,
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dislikes: Int32,
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rating: Float64,
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description: String,
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})
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end
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def get_record(context, video_id)
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def get_video(video_id, context)
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client = HTTP::Client.new("www.youtube.com", 443, context)
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video_info = client.get("/get_video_info?video_id=#{video_id}&el=info&ps=default&eurl=&gl=US&hl=en").body
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info = HTTP::Params.parse(video_info)
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video_html = client.get("/watch?v=#{video_id}").body
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html = XML.parse(video_html)
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views = info["view_count"]
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views = info["view_count"].to_i64
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rating = info["avg_rating"].to_f64
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# css query [title = "I like this"] > span
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like = html.xpath_node(%q(//button[@title="I like this"]/span))
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if like
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likes = like.content.delete(",").to_i
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likes = html.xpath_node(%q(//button[@title="I like this"]/span))
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if likes
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likes = likes.content.delete(",").to_i
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else
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likes = 1
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end
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# css query [title = "I dislike this"] > span
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dislike = html.xpath_node(%q(//button[@title="I dislike this"]/span))
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if dislike
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dislikes = dislike.content.delete(",").to_i
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dislikes = html.xpath_node(%q(//button[@title="I dislike this"]/span))
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if dislikes
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dislikes = dislikes.content.delete(",").to_i
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else
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dislikes = 1
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end
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args = {Time.now, video_id, video_info, video_html, views, likes, dislikes, rating}
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return args
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description = html.xpath_node(%q(//p[@id="eow-description"]))
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if description
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description = description.to_xml
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else
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description = ""
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end
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video_record = Video.new(Time.now, video_id, video_info, video_html, views, likes, dislikes, rating, description)
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return video_record
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end
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get "/watch/:video_id" do |env|
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video_id = env.params.url["video_id"]
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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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end
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# last_updated, video_id, video_info, video_html, views, likes, dislikes, rating
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video_record = pg.query_one?("select * from videos where video_id = $1",
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video_id,
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as: {Time, String, String, String, Int64, Int32, Int32, Float64})
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# z value here represents a confidence level of 0.95
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z = 1.96
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phat = 1.0*pos/n
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# If record was last updated more than 5 minutes ago or doesn't exist, refresh
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if video_record.nil?
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video_record = get_record(context, video_id)
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pg.exec("insert into videos values ($1, $2, $3, $4, $5, $6, $7, $8)",
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video_record.to_a)
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elsif Time.now.epoch - video_record[0].epoch > 300
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video_record = get_record(context, video_id)
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pg.exec("update videos set last_updated = $1, video_info = $3, video_html = $4, views = $5, likes = $6, dislikes = $7, rating = $8 where video_id = $2",
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return (phat + z*z/(2*n) - z * Math.sqrt((phat*(1 - phat) + z*z/(4*n))/n))/(1 + z*z/n)
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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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pg = DB.open "postgres://kemal:kemal@localhost:5432/invidious"
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context = OpenSSL::SSL::Context::Client.insecure
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get "/watch" do |env|
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video_id = env.params.query["v"]
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if pg.query_one?("select exists (select true from videos where video_id = $1)", video_id, as: Bool)
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video_record = pg.query_one("select * from videos where video_id = $1", video_id, as: Video)
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# If record was last updated more than 1 hour ago, refresh
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if Time.now - video_record.last_updated > Time::Span.new(1, 0, 0, 0)
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video_record = get_video(video_id, context)
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pg.exec("update videos set last_updated = $1, video_info = $3, video_html = $4,\
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views = $5, likes = $6, dislikes = $7, rating = $8, description = $9 where video_id = $2",
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video_record.to_a)
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end
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else
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client = HTTP::Client.new("www.youtube.com", 443, context)
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video_info = client.get("/get_video_info?video_id=#{video_id}&el=info&ps=default&eurl=&gl=US&hl=en").body
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info = HTTP::Params.parse(video_info)
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if info["reason"]?
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error_message = info["reason"]
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next templated "error"
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end
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video_record = get_video(video_id, context)
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pg.exec("insert into videos values ($1,$2,$3,$4,$5,$6,$7,$8, $9)", video_record.to_a)
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end
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# last_updated, video_id, video_info, video_html, views, likes, dislikes, rating
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video_info = HTTP::Params.parse(video_record[2])
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video_html = XML.parse(video_record[3])
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views = video_record[4]
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likes = video_record[5]
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dislikes = video_record[6]
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rating = video_record[7]
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video_info = HTTP::Params.parse(video_record.video_info)
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video_html = XML.parse(video_record.video_html)
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fmt_stream = [] of HTTP::Params
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video_info["url_encoded_fmt_stream_map"].split(",") do |string|
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@ -199,16 +255,18 @@ get "/watch/:video_id" do |env|
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fmt_stream.reverse! # We want lowest quality first
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likes = likes.to_f
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dislikes = dislikes.to_f
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views = views.to_f
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related_videos = video_html.xpath_nodes(%q(//li/div/a[contains(@class,"content-link")]/@href))
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engagement = ((dislikes + likes)/views * 100).significant(2)
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calculated_rating = likes/(likes + dislikes) * 4 + 1
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if related_videos.empty?
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related_videos = video_html.xpath_nodes(%q(//ytd-compact-video-renderer/div/a/@href))
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end
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likes = likes.to_s
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dislikes = dislikes.to_s
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views = views.to_s
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likes = video_record.likes.to_f
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dislikes = video_record.dislikes.to_f
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views = video_record.views.to_f
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engagement = ((dislikes + likes)/views * 100)
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calculated_rating = (likes/(likes + dislikes) * 4 + 1)
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templated "watch"
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end
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