验证 html 文本中 url 的存在 [英] validate presence of url in html text

问题描述

我想检测和过滤从表单发送的 html 文本是否包含 url 或 urls.

I would like detect and filter if html text sent from a form, contains url or urls.

例如，我从表单发送此 html:

For example, i send from a form this html:

RESOURCES<br></u></b><a target="_blank" rel="nofollow" href="http://stackoverflow.com/users/778094/hyperrjas">http://stackoverflow.com/users/778094/hyperrjas</a>&nbsp;<br><a target="_blank" rel="nofollow" href="https://github.com/hyperrjas">https://github.com/hyperrjas</a>&nbsp;<br><a target="_blank" rel="nofollow" href="http://www.linkedin.com/pub/juan-ardila-serrano/11/2a7/62">http://www.linkedin.com/pub/juan-ardila-serrano/11/2a7/62</a>&nbsp;<br>

我不想在 html 文本中允许一个或多个 url/url.它可能是这样的:

validate :no_urls

def no_urls
  if text_contains_url
   errors.add(:url, "#{I18n.t("mongoid.errors.models.profile.attributes.url.urls_are_not_allowed_in_this_text", url: url)}")
  end
end

我想知道，如何过滤html文本是否包含一个或多个网址?

推荐答案

Mattherick 的答案仅在字符串不包含冒号符号 ":" 时有效.

The Mattherick's answer only works if the string not contains the colon symbol ":".

对于 Ruby 1.9.3，正确的做法是添加第二个参数来解决这个问题.

With Ruby 1.9.3 right thing is to add a second parameter to fix this problem.

此外，如果您将电子邮件地址添加为纯文本，则此代码不会过滤此电子邮件地址.解决此问题的方法是:

Also, If you add a email address as plain text, this code is not filtering this email address. The fix to this problem is:

html_text  = "html text with email address e.g. [e-mail]"
email_address = html_text.match(/[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}/i)[0]

所以，这是我的代码，适合我:

So, this is my code that works correctly for me:

def no_urls
  whitelist = %w(attr1, attr2, attr3, attr4)
  attributes.select{|el| whitelist.include?(el)}.each do |key, value|
    links = URI.extract(value, /http(s)?|mailto/)
    email_address = "#{value.match(/[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}/i)}"
    unless links.empty? and email_address.empty?
      logger.info links.first.inspect
      errors.add(key, "#{I18n.t("mongoid.errors.models.cv.attributes.no_urls")}")
    end
  end
end

问候！

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