如何解析链接并转义html实体？

Question

I have some user provided content that I want to render.

Obviously the content should be escaped, rails does this by default. However I also want to parse the text so that urls are presented as links.

There is an auto_link helper which does just that. However no matter what order I do this in I can't get the desired result.

Take content:

content                                             
  => "<img src=\"foo\" />\\r\\n\\r\\nhttp://google.com"

If this is escaped, because the slashes in the url are escaped, auto_link will not work:

Rack::Utils.escape_html(content)                    
  => "<img src="foo" />\\r\\n\\r\\nhttp://google.com"

If I use auto_link first obviously the link will be escaped. Additionally auto_link strips unwanted content rather than escaping. If a script tag is present in the input I want it escaped not removed.

auto_link(content)                                  
  => "<img src=\"foo\" />\\r\\n\\r\\n<a href=\"http://google.com\">http://google.com</a>"

Any idea how to do get the desired output?

Thanks for any help.

Answer 1

You could strip out all the escaped whitespace characters with content.gsub!(/\\\\./, "") . Then you'll be able to use auto_link .

Answer 2

我最终使用的解决方案是放弃auto_link，让Rack转义我的内容服务器端，然后使用https://github.com/gabrielizaias/urlToLink在客户端的文本中解析出链接

$('p').urlToLink();

Answer 3

我在以下方面取得了成功：

auto_link(h(content))