Jinja呈现HTML保留换行符的文本 [英] Jinja render text in HTML preserving line breaks

问题描述

我有一个简单的表单，如下所示:

I have a simple form like this:

class RecordForm(Form):    
    notes = TextAreaField('Notes')

我将数据记录为以下三个段落:

I record the data in three paragraphs like this:

para1

para2

para3

在模板中，我想以只读方式查看该记录的内容. (不可修改的表单)

In the template I would like to see the content of that record in read-only. (Not editable form)

记录是这种情况下包含数据的模型:

record is this case the model containing the data:

<td>{{ record.notes }}</td>

->

<td>para1 para2 para3</td>

我该怎么做才能显示多行?

What can I do to make it to show the multi-lines?

推荐答案

所有空格(包括换行符)都被转换为HTML中的单个空格.

All whitespace, including newlines, is turned into a single space in HTML.

您的选择，从最佳到最差:

Your options, from best to worst:

1. 将white-space: pre-wrap;放在包含的元素上.这告诉HTML完全显示源代码中显示的所有空白，包括换行符. (您也可以使用<pre>标记，但这也会禁用您可能不希望的自动换行.)
2. 将纯文本作为Markdown对待，并向其投放Markdown处理器-Markdown所做的其中一项工作就是将段落包装在<p>中.
3. 在Python领域中，执行.replace('\n', '<br>').但这使您容易受到XSS的攻击，因为字符串中可能还会有其他类似HTML的垃圾，并且进行修复很麻烦.

1. Put white-space: pre-wrap; on the containing element. This tells HTML to show all whitespace exactly as it appears in the source, including newlines. (You could also use a <pre> tag, but that will also disable word-wrapping, which you probably don't want.)
2. Treat the plain text as Markdown and throw a Markdown processor at it—one of the things Markdown does is wrap paragraphs in <p>.
3. In Python-land, do .replace('\n', '<br>'). But this leaves you vulnerable to XSS because there might be other HTML-like junk in the string, and fixing that is a bit of a pain.

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