I'm using Rails 5 with Ruby 4.2 and scanning a document that I parsed with Nokogiri, looking in a case insensitive way for a link with text:
a_elt = doc ? doc.xpath('//a').detect { |node| /link[[:space:]]+text/i === node.text } : nil After getting the HTML of my web page in content, I parse it into a Nokogiri doc using:
doc = Nokogiri::HTML(content) The problem is, I'm getting
ArgumentError invalid byte sequence in UTF-8 on certain web pages when using the above regular expression.
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>' Is there a way I can rewrite the above to automatically account for the encoding or weird characters and not flip out?
1 Answers
Answers 1
Your question may have already been answered before. Have you tried the methods from "Is there any way to clean a file of "invalid byte sequence in UTF-8" errors in Ruby?"?
Specifically before the detect block, try to remove the invalid bytes and control characters except new line:
doc.scrub!("") doc.gsub!(/[[:cntrl:]&&[^\n\r]]/,"") Remember, scrub! is a Ruby 2.1+ method.
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