下载带有URL的URL的图像文件

Question

我正在使用不会访问互联网的导轨为非营利组织开发学习应用程序。所有资产必须在当地安置。该应用程序包含数千个图像，实际上只是URL。我对开发世界很新，但发现很难找到解决这个问题的方法。

大多数数据库内容都使用自定义rake和cron任务进行播种。我们正在使用Dribbble API来提取大部分内容，包括图片。看看网址，看起来Dribbble正在使用S3来存放他们的图片。也许这是解决方案的一部分。 （例如网址：https://d13yacurqjgara.cloudfront.net/users/4521/screenshots/2742352/nest_notifications.jpg）。

我知道这个话题对于那些人来说一定很容易，但我确实没有经验或成功找到解决方案。非常感谢帮助和建议！

根据请求，这是rake任务的副本：

namespace :dribbble do
desc "TODO"
  task get_recent: :environment do

url="https://api.dribbble.com/v1/shots/?access_token=XXX"    

response = HTTParty.get(url)
recent_shots = JSON.parse(response.body)

recent_shots.each do |s|
  users_dribbbleid = s['user']['id']
  shots_dribbbleid = s['user']['id']


  existing_user = User.where(designer_id: users_dribbbleid)

  #IS THERE AN EXISTING USER IN THE DATABASE? IF NO, THEN...
  if existing_user.empty?
    newuser = User.create(
      designer_id: s['user']['id'],
      designer_full_name: s['user']['name'],
      designer_username: s['user']['username'],
      designer_home_url: s['user']['html_url'],
      designer_avatar_url: s['user']['avatar_url'],
      designer_bio: s['user']['bio'],
      designer_location: s['user']['location'],
      designer_bk_count: s['user']['buckets_count'],
      designer_comments_received_count: s['user']['comments_received_count'],
      designer_follower_count: s['user']['followers_count'],
      designer_is_following_count: s['user']['followings_count'],
      designer_made_likes_count: s['user']['likes_count'],
      designer_received_likes_count: s['user']['likes_received_count'],
      designer_project_count: s['user']['projects_count'],
      designer_rebounds_received_count: s['user']['rebounds_received_count'],
      designer_added_shots_count: s['user']['shots_count'],
      designer_list_of_followers_url: s['user']['followers_url'],
      designer_following_list_url: s['user']['following_url'],
      designer_list_of_shots_url: s['shots_url']
      )
    newshot = Shot.create(
      dribbble_id: s["id"],
      title: s["title"],
      description: s["description"],
      width: s["width"],
      height: s["height"],
      images_hidpi: s["images"]["hidpi"],
      images_normal: s["images"]["normal"],
      images_teaser: s["images"]["teaser"],
      viewcount: s["views_count"],
      likes_count: s['likes_count'],
      comments_count: s['comments_count'],
      attachments_count: s['attachments_count'],
      rebounds_count: s['rebounds_count'],
      buckets_count: s['buckets_count'],
      html_url: s['html_url'],
      attachments_url: s["attatchments_url"],
      buckets_url: s['buckets_url'],
      comments_url: s['comments_url'],
      likes_url: s['likes_url'],
      projects_url: s['projects_url'],
      animated: s['animated'],
      tags: s['tags'],
      user_id: newuser.id
      )
    commentresponse = HTTParty.get(s['comments_url']+"?access_token=XXX")
    comments = JSON.parse(commentresponse.body)
    comments.each do |c|
    comments_dribbbleid = c["id"]

    existing_comment = Comment.where(comment_id: comments_dribbbleid)

    if existing_comment.empty?
      newcomment = Comment.create(
        comment_id: c["id"].to_s,
        comment_created_at: c["created_at"],
        body: c["body"],
        user_avatar_url: c["user"]["avatar_url"],
        user_id: c["user"]["id"],
        user_name: c['user']['name'],
        shot_id: newshot.id
        )
      end
    end

    #IF THERE IS AN EXISTING USER ALREADY, THEN CHECK IF THERE IS AN EXISTING SHOT.  IF THERE IS NOT AN EXISTING SHOT, THEN...
    else
      existing_user = User.where(designer_id: users_dribbbleid)
      existing_shot = Shot.where(user_id: existing_user[0].id)
      if existing_shot.empty?
        newshot = Shot.create(
          dribbble_id: s["id"],
          title: s["title"],
          description: s["description"],
          width: s["width"],
          height: s["height"],
          images_hidpi: s["images"]["hidpi"],
          images_normal: s["images"]["normal"],
          images_teaser: s["images"]["teaser"],
          viewcount: s["views_count"],
          likes_count: s['likes_count'],
          comments_count: s['comments_count'],
          attachments_count: s['attachments_count'],
          rebounds_count: s['rebounds_count'],
          buckets_count: s['buckets_count'],
          html_url: s['html_url'],
          attachments_url: s["attatchments_url"],
          buckets_url: s['buckets_url'],
          comments_url: s['comments_url'],
          likes_url: s['likes_url'],
          projects_url: s['projects_url'],
          animated: s['animated'],
          tags: s['tags'],
          user_id: existing_user[0].id
          )

        commentresponse = HTTParty.get(s['comments_url']+"?access_token=XXX")
        comments = JSON.parse(commentresponse.body)
        comments.each do |c|

        comments_dribbbleid = c["id"]
        existing_comment = Comment.where(comment_id: comments_dribbbleid)

        if existing_comment.empty?
          newcomment = Comment.create(
            comment_id: c["id"].to_s,
            comment_created_at: c["created_at"],
            body: c["body"],
            user_avatar_url: c["user"]["avatar_url"],
            user_id: c["user"]["id"],
            user_name: c['user']['name'],
            shot_id: newshot.id
            )
          end
        end
    end
  end
end

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