250 行
7.5 KiB
Crystal
250 行
7.5 KiB
Crystal
class InvidiousChannel
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add_mapping({
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id: String,
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author: String,
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updated: Time,
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})
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end
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class ChannelVideo
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add_mapping({
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id: String,
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title: String,
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published: Time,
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updated: Time,
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ucid: String,
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author: String,
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})
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end
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def get_channel(id, client, db, refresh = true, pull_all_videos = true)
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if db.query_one?("SELECT EXISTS (SELECT true FROM channels WHERE id = $1)", id, as: Bool)
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channel = db.query_one("SELECT * FROM channels WHERE id = $1", id, as: InvidiousChannel)
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if refresh && Time.now - channel.updated > 10.minutes
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channel = fetch_channel(id, client, db, pull_all_videos)
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channel_array = channel.to_a
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args = arg_array(channel_array)
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db.exec("INSERT INTO channels VALUES (#{args}) \
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ON CONFLICT (id) DO UPDATE SET updated = $3", channel_array)
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end
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else
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channel = fetch_channel(id, client, db, pull_all_videos)
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args = arg_array(channel.to_a)
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db.exec("INSERT INTO channels VALUES (#{args})", channel.to_a)
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end
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return channel
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end
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def fetch_channel(ucid, client, db, pull_all_videos = true)
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rss = client.get("/feeds/videos.xml?channel_id=#{ucid}").body
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rss = XML.parse_html(rss)
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author = rss.xpath_node(%q(//feed/title))
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if !author
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raise "Deleted or invalid channel"
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end
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author = author.content
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# Auto-generated channels
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# https://support.google.com/youtube/answer/2579942
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if author.ends_with?(" - Topic") ||
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{"Popular on YouTube", "Music", "Sports", "Gaming"}.includes? author
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auto_generated = true
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end
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if !pull_all_videos
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rss.xpath_nodes("//feed/entry").each do |entry|
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video_id = entry.xpath_node("videoid").not_nil!.content
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title = entry.xpath_node("title").not_nil!.content
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published = Time.parse(entry.xpath_node("published").not_nil!.content, "%FT%X%z", Time::Location.local)
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updated = Time.parse(entry.xpath_node("updated").not_nil!.content, "%FT%X%z", Time::Location.local)
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author = entry.xpath_node("author/name").not_nil!.content
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ucid = entry.xpath_node("channelid").not_nil!.content
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video = ChannelVideo.new(video_id, title, published, Time.now, ucid, author)
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db.exec("UPDATE users SET notifications = notifications || $1 \
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WHERE updated < $2 AND $3 = ANY(subscriptions) AND $1 <> ALL(notifications)", video.id, video.published, ucid)
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video_array = video.to_a
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args = arg_array(video_array)
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db.exec("INSERT INTO channel_videos VALUES (#{args}) \
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ON CONFLICT (id) DO UPDATE SET title = $2, published = $3, \
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updated = $4, ucid = $5, author = $6", video_array)
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end
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else
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page = 1
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ids = [] of String
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loop do
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url = produce_channel_videos_url(ucid, page, auto_generated: auto_generated)
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response = client.get(url)
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json = JSON.parse(response.body)
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if json["content_html"]? && !json["content_html"].as_s.empty?
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document = XML.parse_html(json["content_html"].as_s)
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nodeset = document.xpath_nodes(%q(//li[contains(@class, "feed-item-container")]))
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else
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break
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end
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if auto_generated
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videos = extract_videos(nodeset)
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else
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videos = extract_videos(nodeset, ucid)
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videos.each { |video| video.ucid = ucid }
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videos.each { |video| video.author = author }
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end
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count = nodeset.size
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videos = videos.map { |video| ChannelVideo.new(video.id, video.title, video.published, Time.now, video.ucid, video.author) }
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videos.each do |video|
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ids << video.id
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# FIXME: Red videos don't provide published date, so the best we can do is ignore them
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if Time.now - video.published > 1.minute
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db.exec("UPDATE users SET notifications = notifications || $1 \
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WHERE updated < $2 AND $3 = ANY(subscriptions) AND $1 <> ALL(notifications)", video.id, video.published, video.ucid)
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video_array = video.to_a
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args = arg_array(video_array)
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db.exec("INSERT INTO channel_videos VALUES (#{args}) ON CONFLICT (id) DO UPDATE SET title = $2, \
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published = $3, updated = $4, ucid = $5, author = $6", video_array)
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end
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end
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if count < 30
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break
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end
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page += 1
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end
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# When a video is deleted from a channel, we find and remove it here
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db.exec("DELETE FROM channel_videos * WHERE NOT id = ANY ('{#{ids.map { |id| %("#{id}") }.join(",")}}') AND ucid = $1", ucid)
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end
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channel = InvidiousChannel.new(ucid, author, Time.now)
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return channel
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end
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def produce_channel_videos_url(ucid, page = 1, auto_generated = nil)
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if auto_generated
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seed = Time.epoch(1525757349)
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until seed >= Time.now
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seed += 1.month
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end
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timestamp = seed - (page - 1).months
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page = "#{timestamp.epoch}"
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switch = "\x36"
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else
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page = "#{page}"
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switch = "\x00"
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end
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meta = "\x12\x06videos"
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meta += "\x30\x02"
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meta += "\x38\x01"
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meta += "\x60\x01"
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meta += "\x6a\x00"
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meta += "\xb8\x01\x00"
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meta += "\x20#{switch}"
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meta += "\x7a"
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meta += page.size.to_u8.unsafe_chr
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meta += page
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meta = Base64.urlsafe_encode(meta)
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meta = URI.escape(meta)
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continuation = "\x12"
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continuation += ucid.size.to_u8.unsafe_chr
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continuation += ucid
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continuation += "\x1a"
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continuation += meta.size.to_u8.unsafe_chr
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continuation += meta
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continuation = continuation.size.to_u8.unsafe_chr + continuation
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continuation = "\xe2\xa9\x85\xb2\x02" + continuation
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continuation = Base64.urlsafe_encode(continuation)
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continuation = URI.escape(continuation)
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url = "/browse_ajax?continuation=#{continuation}&gl=US&hl=en"
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return url
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end
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def get_about_info(ucid)
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client = make_client(YT_URL)
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about = client.get("/user/#{ucid}/about?disable_polymer=1")
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about = XML.parse_html(about.body)
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if !about.xpath_node(%q(//span[@class="qualified-channel-title-text"]/a))
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about = client.get("/channel/#{ucid}/about?disable_polymer=1")
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about = XML.parse_html(about.body)
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end
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if !about.xpath_node(%q(//span[@class="qualified-channel-title-text"]/a))
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raise "User does not exist."
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end
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sub_count = about.xpath_node(%q(//span[contains(text(), "subscribers")]))
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if sub_count
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sub_count = sub_count.content.delete(", subscribers").to_i?
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end
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sub_count ||= 0
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author = about.xpath_node(%q(//span[@class="qualified-channel-title-text"]/a)).not_nil!.content
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ucid = about.xpath_node(%q(//link[@rel="canonical"])).not_nil!["href"].split("/")[-1]
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# Auto-generated channels
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# https://support.google.com/youtube/answer/2579942
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auto_generated = false
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if about.xpath_node(%q(//ul[@class="about-custom-links"]/li/a[@title="Auto-generated by YouTube"])) ||
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about.xpath_node(%q(//span[@class="qualified-channel-title-badge"]/span[@title="Auto-generated by YouTube"]))
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auto_generated = true
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end
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return {author, ucid, auto_generated, sub_count}
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end
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def get_60_videos(ucid, page, auto_generated)
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count = 0
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videos = [] of SearchVideo
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client = make_client(YT_URL)
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2.times do |i|
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url = produce_channel_videos_url(ucid, page * 2 + (i - 1), auto_generated: auto_generated)
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response = client.get(url)
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json = JSON.parse(response.body)
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if json["content_html"]? && !json["content_html"].as_s.empty?
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document = XML.parse_html(json["content_html"].as_s)
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nodeset = document.xpath_nodes(%q(//li[contains(@class, "feed-item-container")]))
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if !json["load_more_widget_html"]?.try &.as_s.empty?
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count += 30
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end
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if auto_generated
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videos += extract_videos(nodeset)
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else
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videos += extract_videos(nodeset, ucid)
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end
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else
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break
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end
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end
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return videos, count
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end
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