Question

如何使用youtube_it gem for Ruby on Rails从youtube频道（https://www.youtube.com/channel/UCwHnsUEYrQUTUxC4dvrv0QQ）获取视频？

或者你能告诉我另一个可以帮助我的宝石吗？

Answer 1

我就是这样做的。

我在config / initializers / youtube_it.rb中有这个：

$youtube_it = YouTubeIt::Client.new(dev_key: ENV['YOUTUBE_KEY'])

获取视频的第一页：

    query = {
      author: channel_url.split('/').last,
      order_by: 'published',
      page: 1,
    }

    # scraping from newesr to oldest
    videos = $youtube_it.videos_by(query).videos

这是一个刮擦的例子，你可以安排一个工作来定期调用scrape方法。

该方法首先从最新视频到最旧视频。然后backward_scrape_done设置为true，然后仅抓取新视频。

class Import < ActiveRecord::Base

  def scrape
    query = {
      author: channel_url.split('/').last,
      order_by: 'published',
    }

    query[:page] = cursor

    # scraping from newesr to oldest
    videos = fetch_videos(query)


    if videos.count == 0
      # we've reached the end
      self.backward_scrape_done = true
      self.cursor = 0
    end

    for video in videos
      add_video video
    end

    # next time scrape next page
    self.cursor = cursor + 1

  ensure
    self.scraped_at = Time.now
    self.save!
  end

  def fetch_videos(query)
    $youtube_it.videos_by(query).videos
  end


  def add_video video
    url = video.player_url.
      gsub(/[?&]feature=youtube_gdata_player/, '')

    # skip this video if its already there
    if Video.where(youtube_url: url).first
      self.cursor = 0
      save
      return
    end

    video = YoutubeVideo.create!(
      title: video.title,
      duration: video.duration,
      description: video.description,
      youtube_url: url,
    )
  end
end

希望有所帮助！

更新：由于youtube很快就会摆脱它的API V2，你应该切换到支持最新API的东西，比如我现在使用的yt gem：

https://github.com/Fullscreen/yt

如何使用youtube_it gem按频道获取视频

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