require "http/client" require "json" require "kemal" require "pg" require "xml" class AdaptiveFmts JSON.mapping( clen: Int32, url: String, lmt: Int64, index: String, fps: Int32, itag: Int32, projection_type: Int32, size: String, init: String, quality_label: String, bitrate: Int32, type: String ) end class URLEncodedFmtStreamMap JSON.mapping( url: String, itag: Int32, fallback_host: String, quality: String, type: String ) end class CaptionTracks JSON.mapping( v: String, lc: String, t: String, u: String ) end class CaptionTranslationLanguages JSON.mapping( lc: String, n: String ) end class VideoInfo JSON.mapping( cver: String, length_seconds: Int32, iurlhq720: String, vm: String, ypc_ad_indicator: Int32, hash_cc: Bool, dashmpd: String, iv3_module: Int32, iurlmq: String, no_get_video_log: Int32, cc_font: Int32, allowed_ads: String, oid: String, iv_invideo_url: String, cc_asr: Int32, relative_loudness: Float64, video_verticals: String, default_audio_track_index: Int32, loudness: Float64, ptchn: String, csn: String, pltype: String, author: String, # caption_audio_tracks: videostats_playback_base_url: String, root_ve_type: String, muted: Int32, cc3_module: Int32, adaptive_fmts: AdaptiveFmts, fmt_list: Array(String), allow_embed: Int32, iurlhq: String, use_cipher_signature: Bool, status: String, video_id: String, idpj: Int32, iurlhmaxres: String, short_view_count_text: String, iv_load_policy: Int32, plid: String, vss_host: String, ttsurl: String, token: String, account_playback_token: String, of: String, iurl: String, iurlsd: String, c: String, timestamp: Int32, url_encoded_fmt_stream_map: URLEncodedFmtStreamMap, allow_ratings: Int32, view_count: Int64, title: String, caption_tracks: CaptionTracks, fexp: Array(String), storyboard_spec: String, keywords: Array(String), ucid: String, remarketing_url: String, caption_translation_languages: CaptionTranslationLanguages, avg_rating: Float64, is_listed: Int32, ptk: String, cl: Int32, watermark: Array(String), ldpj: Int32, tmi: Int32, eventid: String, thumbnail_url: String ) end macro templated(filename) render "src/views/#{{{filename}}}.ecr", "src/views/layout.ecr" end context = OpenSSL::SSL::Context::Client.insecure client = HTTP::Client.new("www.youtube.com", 443, context) video_id = "Vufba_ZcoR0" video_info = client.get("/get_video_info?video_id=#{video_id}&el=info&ps=default&eurl=&gl=US&hl=en").body p VideoInfo.from_json(video_info) get "/" do |env| templated "index" end get "/watch/:video_id" do |env| video_id = env.params.url["video_id"] client = HTTP::Client.new("www.youtube.com", 443, context) video_info = client.get("/get_video_info?video_id=#{video_id}&el=info&ps=default&eurl=&gl=US&hl=en").body video_info = HTTP::Params.parse(video_info) pageContent = client.get("/watch?v=#{video_id}").body doc = XML.parse(pageContent) 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 # css query [title="I like this"] > span likes = doc.xpath_node(%q(//button[@title="I like this"]/span)) if likes likes = likes.content.delete(",").to_i else likes = 1 end # css query [title="I dislike this"] > span dislikes = doc.xpath_node(%q(//button[@title="I dislike this"]/span)) if dislikes dislikes = dislikes.content.delete(",").to_i else dislikes = 1 end engagement = ((dislikes.to_f32 + likes.to_f32)*100 / video_info["view_count"].to_f32).significant(2) calculated_rating = likes.to_f32/(likes.to_f32 + dislikes.to_f32)*4 + 1 templated "watch" end public_folder "assets" Kemal.run