ruby-on-rails – 解析youtube网址

我写了一个 ruby youtube url解析器.它被设计为输入以下结构之一的youtube url(这些是我能找到的youtube url结构,也许还有更多？)：

http://youtu.be/sGE4HMvDe-Q
http://www.youtube.com/watch?v=Lp7E973zozc&feature=relmfu
http://www.youtube.com/p/A0C3C1D163BE880A?hl=en_US&fs=1

目的是只保存剪辑或播放列表的id以便嵌入它,所以如果它是一个剪辑：’sGE4HMvDe-Q’,或者它是一个播放列表：’p / A0C3C1D163BE880A’

我写的解析器适用于这些网址,但看起来有点脆弱和冗长,我只是想知道是否有人可以建议一个更好的ruby方法来解决这个问题？

def parse_youtube
    a = url.split('//').last.split('/')
    b = a.last.split('watch?v=').last.split('?').first.split('&').first
    if a[1] == 'p'
        url = "p/#{b}"
    else
        url = b
    end
end

解决方法

def parse_youtube url
   regex = /(?:.be\/|\/watch\?v=|\/(?=p\/))([\w\/\-]+)/
   url.match(regex)[1]
end

urls = %w[http://youtu.be/sGE4HMvDe-Q 
          http://www.youtube.com/watch?v=Lp7E973zozc&feature=relmfu
          http://www.youtube.com/p/A0C3C1D163BE880A?hl=en_US&fs=1]

urls.each {|url| puts parse_youtube url }
# sGE4HMvDe-Q
# Lp7E973zozc
# p/A0C3C1D163BE880A

根据您使用它的方式,您可能希望更好地验证URL确实来自youtube.

更新：

几年后再回到这里.我一直对最初的答案是多么草率感到恼火.由于Youtube域的有效性无论如何都没有得到验证,我已经删除了一些slop.

NODE                     EXPLANATION
--------------------------------------------------------------------------------
  (?:                      group,but do not capture:
--------------------------------------------------------------------------------
    .                        any character except \n
--------------------------------------------------------------------------------
    be                       'be'
--------------------------------------------------------------------------------
    \/                       '/'
--------------------------------------------------------------------------------
   |                        OR
--------------------------------------------------------------------------------
    \/                       '/'
--------------------------------------------------------------------------------
    watch                    'watch'
--------------------------------------------------------------------------------
    \?                       '?'
--------------------------------------------------------------------------------
    v=                       'v='
--------------------------------------------------------------------------------
   |                        OR
--------------------------------------------------------------------------------
    \/                       '/'
--------------------------------------------------------------------------------
    (?=                      look ahead to see if there is:
--------------------------------------------------------------------------------
      p                        'p'
--------------------------------------------------------------------------------
      \/                       '/'
--------------------------------------------------------------------------------
    )                        end of look-ahead
--------------------------------------------------------------------------------
  )                        end of grouping
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    [\w\/\-]+                any character of: word characters (a-z,A-Z,0-9,_),'\/','\-' (1 or more
                             times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
  )                        end of \1

原文链接：https://www.f2er.com/ruby/271167.html

ruby-on-rails – 解析youtube网址

解决方法

猜你在找的Ruby相关文章