在Rails中转义HTML字符串 [英] Unescaping HTML string in Rails

问题描述

我已经继承了以下字符串（我无法对该格式做任何事）：

I have the inherited the following string (I can do nothing about the format):

 <iframe \n  class=\"some_class\"\n  type=\"text/html\" \n  src=\"/embed/iframe_content.html?id=tsqA5D7_z10\" \n  width=\"960\" \n  height=\"593\" \n  marginwidth=\"0\" \n  marginheight=\"0\" \n  frameborder=\"0\">\n</iframe>

我将其呈现在erb模板中：

I am rendering it in an erb template like this:

<%= the_string %>

目前它呈现为如下文字：

At the moment it renders as text like this:

< iframe class =some_classtype =text / htmlsrc =/ embed / iframe_content.html？id = tsqA5D7_z10width =960height =593marginwidth =0marginheight = 0frameborder =0>< / iframe>

<iframe class="some_class" type="text/html" src="/embed/iframe_content.html?id=tsqA5D7_z10" width="960" height="593" marginwidth="0" marginheight="0" frameborder="0"></iframe>

我需要将其呈现为HTML。

I need to render it as HTML.

我尝试过以下操作：

1. <％= the_string.html_safe％> ＃呈现字符串不变


2. <％= CGI.unescapeHTML（the_string）％> ＃错误类型错误'不能重复NilClass'


3. <％= CGI.unescapeHTML（the_string）.html_safe％> ＃错误类型错误'不能重复NilClass'


4. <％= raw the_string％> ＃呈现字符串不变

1. <%= the_string.html_safe %> # Renders the string unchanged
2. <%= CGI.unescapeHTML(the_string) %> # Errors with a Type Error 'can't dup NilClass'
3. <%= CGI.unescapeHTML(the_string).html_safe %> # Errors with a Type Error 'can't dup NilClass'
4. <%= raw the_string %> # Renders the string unchanged

如何将此字符串呈现为HTML？

How can I render this string as HTML?

推荐答案

你似乎已经注意到，有两件事情ou需要照顾：

As you seem to have noticed, there are two things you need to take care of:

1. 卸载HTML实体


2. 在您的查看

对于数字2 <％= raw ...％> 应该工作正常。

For number 2 <%= raw ... %> should work fine.

对于数字1 CGI.unescapeHTML 是正确的想法，但我不认为它会识别所有HTML实体，因此我建议您查看 HTML Entites宝石

For number 1 CGI.unescapeHTML was the right idea, but I don't think it recognizes all HTML entities so I would recommend taking a look at the HTML Entites gem

您还可以尝试使用 simple_format 帮助方法，但我认为你将要传递一些选项来允许< iframe> 标签

You can also try and use the simple_format helper method, but I think you are going to have to pass it some options for it to allow the <iframe> tag

也强烈建议将您的 unescaping 逻辑转换为辅助方法。

also I would strongly suggest moving your unescaping logic into a helper method.

这篇关于在Rails中转义HTML字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！