CODEWITHSUNDEEP
htmlrubyregexhtml-parsing
user2634870
user2634870

Reputation: 55

Remove specific tags if are inside specific tag

I have a problem, and I have to find the fast solution.

I want to remove br and p tags inside all "tables" but not outside.

For ex.

Initial html document:

...
<p>Hello</p>
<table>
  <tr>
    <td><p>Text example <br>continues...</p></td>
    <td><p>Text example <br>continues...</p></td>
    <td><p>Text example <br>continues...</p></td>
    <td><p>Text example <br>continues...</p></td>
  </tr>
</table>
<p>Bye<br></p>
<p>Bye<br></p>
...

My objective:

...
<p>Hello</p>
<table>
  <tr>
    <td>Text example continues...</td>
    <td>Text example continues...</td>
    <td>Text example continues...</td>
    <td>Text example continues...</td>
  </tr>
</table>
<p>Bye<br></p>
<p>Bye<br></p>
...

Now, thats is my method to clean:

loop do
  if html.match(/<table>(.*?)(<\/?(p|br)*?>)(.*?)<\/table>/) != nil
    html = html.gsub(/<table>(.*?)(<\/?(p|br)*?>)(.*?)<\/table>/,'<table>\1 \4</table>')
  else
    break
  end
end

That works great, but the problem is, I have 1xxx documents and every one have about 1000 lines... and takes 1-3 hours every one. ((1-3 hours)*(thousands documents)) = ¡pain!

I'm looking to do it with Sanitize or other method, but for now... I don't find the way.

Can anybody help me?

Thank you in advance! Manu

Upvotes: 2

Views: 147

Answers (1)

Arup Rakshit
Arup Rakshit

Reputation: 118261

Using Nokogiri:

require 'nokogiri'

doc = Nokogiri::HTML::Document.parse <<-_HTML_
<p>Hello</p>
<table>
  <tr>
    <td><p>Text example <br>continues...</p></td>
    <td><p>Text example <br>continues...</p></td>
    <td><p>Text example <br>continues...</p></td>
    <td><p>Text example <br>continues...</p></td>
  </tr>
</table>
<p>Bye<br></p>
<p>Bye<br></p>
_HTML_

doc.xpath("//table/tr/td/p").each do |el|
  el.replace(el.text)
end

puts doc.to_html

Output:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><body>
<p>Hello</p>
<table><tr>
<td>Text example continues...</td>
    <td>Text example continues...</td>
    <td>Text example continues...</td>
    <td>Text example continues...</td>
  </tr></table>
<p>Bye<br></p>
<p>Bye<br></p>
</body>
</html>

Upvotes: 4

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