我正在使用Cheerio JS来简化一些古老的HTML代码并将其转换为HTML5。除其他外,我将替换一些类似于以下内容的重标记:
要替换的节点:
<div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
<table cellpadding="6" cellspacing="0" border="0" width="100%">
<tbody>
<tr>
<td class="alt2" style="border:1px solid #999">
<div>
Originally Posted by <strong>Username</strong>
</div>
<div style="font-style:italic">Lorem ipsum dolor sit amet</div>
</td>
</tr>
</tbody>
</table>
</div>
转换后的输出应该看起来像这样:
<blockquote>Lorem ipsum dolor sit amet</blockquote>
这是我当前正在使用的代码当前代码:
$(`table[id^='post']`).each( (i, el) => {
// Get the post
let postBody = $(el).find(`div[id^='post_message_']`).html().trim();
// Replace quotes with blockquotes
cheerio.load(postBody)('div[style^="margin:20px; margin-top:5px; "]').each( (i, el) => {
if ($(el).html().trim().startsWith('<div class="smallfont" style="margin-bottom:2px">Quote')) {
let tbody = $(el).find('tbody > tr > td').html();
let quote = $(el).find('tbody > tr > td > div');
if (quote.html() && quote.text().trim().startsWith('Originally Posted by')) {
let replacement = $('<blockquote>Hello</blockquote>');
quote.parent().html().replace(quote.html(), replacement);
}
// Looks all good
console.log($(el).html())
}
postBody = $(el).html();
});
});
最后,在某些情况下还有更多HTML:
<div id="post_message_123456">
As Username has previously written
<br>
<div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
<table cellpadding="6" cellspacing="0" border="0" width="100%">
<tbody>
<tr>
<td class="alt2" style="border:1px solid #999">
<div>
Originally Posted by <strong>Username</strong>
</div>
<div style="font-style:italic">Lorem ipsum dolor sit amet</div>
</td>
</tr>
</tbody>
</table>
</div>
<br>
I think he has a point!
<img src="smile-with-sunglasses.gif" />
</div>
替换本身似乎可以正常工作,console.log()
语句的输出看起来很好。问题出在最后一行,我试图用替换内容替换原始内容。但是,postBody
看起来像以前一样。我在做什么错了?
答案 0 :(得分:1)
像这样尝试:
let $ = cheerio.load(html)
$('.alt2 div:contains("Originally Posted by")').replaceWith('<blockquote>Lorem ipsum dolor sit amet</blockquote>')
console.log($.html())
答案 1 :(得分:1)
这说明了如何使用安全的URL交换不安全的内容 作为一个有用的现实示例,并且对于大多数正常人而言,进行程序决策比使用正则表达式要容易得多。
const $ = cheerio.load(html)
// example replace all http:// with https://
$('img[src^="http://"]').replaceWith(function() {
const src = $(this).attr('src')
if (src.indexOf('s3.amazon.com')) {
src = src.replace('s3.amazon.com', 'storage.azure')
}
return $(this).attr('src', src.replace('http://', 'https://'))
})