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当然在处理 HTML 的时候,正则很多时候是够用的,但是总有并不那么好写的提取数据的正则。

为了处理这种情况,我们可以在 yak 中使用 xpath 来解决这个问题

doc, err := xpath.LoadHTMLDocument(`<!DOCTYPE html><html lang="en-US"><head><title>Hello,World!</title></head><body><div class="container"><header>    <!-- Logo -->   <h1>City Gallery</h1></header><nav>  <ul>    <li><a href="/London">London</a></li>    <li><a href="/Paris">Paris</a></li>    <li><a href="/Tokyo">Tokyo</a></li>  </ul></nav><article>  <h1>London</h1>  <img src="pic_mountain.jpg" alt="Mountain View" style="width:304px;height:228px;">  <p>London is the capital city of England. It is the most populous city in the  United Kingdom, with a metropolitan area of over 13 million inhabitants.</p>  <p>Standing on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium.</p></article><footer>Copyright &copy;</footer></div></body></html>`)die(err)
// 寻找 p 标签的内容nodes := xpath.Find(doc, "//p")for _, node := range nodes {    // 打印文本    println(xpath.InnerText(node))}

// 寻找 li 标签(第一个)nodes := xpath.Query(doc, "//li")for _, node := range nodes {    // 打印文本    println(xpath.OutputHTML(node))            // <a href="/London">London</a>    println(xpath.OutputHTMLSelf(node))        // <li><a href="/London">London</a></li>}

当然 htmlquery 被完全兼容#

XPATH 原始库 - htmlquery 更详细案例