Question

我使用Rails 5和Ruby 4.2并扫描我用Nokogiri解析的文档，以不区分大小写的方式查找带有文本的链接：

a_elt = doc ? doc.xpath('//a').detect { |node| /link[[:space:]]+text/i === node.text } : nil

在content获取我的网页的HTML后，我使用以下方法将其解析为Nokogiri文档：

doc = Nokogiri::HTML(content)

问题是，我正在

ArgumentError invalid byte sequence in UTF-8

使用上述正则表达式时，在某些网页上

。

2.4.0 :002 > doc.encoding
 => "UTF-8" 
2.4.0 :003 > doc.xpath('//a').detect { |node| /individual[[:space:]]+results/i === node.text }
ArgumentError: invalid byte sequence in UTF-8
    from (irb):3:in `==='
    from (irb):3:in `block in irb_binding'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/nokogiri-1.7.0/lib/nokogiri/xml/node_set.rb:187:in `block in each'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/nokogiri-1.7.0/lib/nokogiri/xml/node_set.rb:186:in `upto'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/nokogiri-1.7.0/lib/nokogiri/xml/node_set.rb:186:in `each'
    from (irb):3:in `detect'
    from (irb):3
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/railties-5.0.1/lib/rails/commands/console.rb:65:in `start'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/railties-5.0.1/lib/rails/commands/console_helper.rb:9:in `start'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:78:in `console'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    from /Users/davea/.rvm/gems/ruby-2.4.0@global/gems/railties-5.0.1/lib/rails/commands.rb:18:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

有没有办法可以重写上面的内容来自动解释编码或奇怪的字符，而不是翻出来？

Answer 1

之前您的问题可能已经得到解答。您是否尝试过＆＃34; Is there any way to clean a file of "invalid byte sequence in UTF-8" errors in Ruby?＆＃34;？

中的方法

特别是在detect块之前，尝试删除除新行之外的无效字节和控制字符：

doc.scrub!("")
doc.gsub!(/[[:cntrl:]&&[^\n\r]]/,"")

请注意，scrub!是Ruby 2.1+ method。

如何避免＆＃34;字节序列无效＆＃34;当使用Nokogiri寻找文本链接时

1 个答案: