javascript - 使用 React Native 解析 RSS feed 时，如何获取描述标签内的描述和 imageUrl？

Question

这是我尝试解析的 RSS 提要中的项目的样子:

<item>
<title>
Former cop gets 18 years in prison for shooting civilian to death
</title>
<description>
<![CDATA[
<a href="https://e.vnexpress.net/news/news/former-cop-gets-18-years-in-prison-for-shooting-civilian-to-death-4020110.html"><img width=130 height=100 src="https://i-english.vnecdn.net/2019/11/30/phuoc146331574997301-157508140-8364-4799-1575086150_180x108.jpg" ></a></br>A Dong Nai court sentenced a former traffic policeman to 18 years in prison on Friday for fatally shooting a man in a family feud.
]]>
</description>
<pubDate>Sat, 30 Nov 2019 12:00:00 +0700</pubDate>
<link>
https://e.vnexpress.net/news/news/former-cop-gets-18-years-in-prison-for-shooting-civilian-to-death-4020110.html
</link>
<guid>
https://e.vnexpress.net/news/news/former-cop-gets-18-years-in-prison-for-shooting-civilian-to-death-4020110.html
</guid>
<slash:comments>0</slash:comments>
</item>

这就是我从 RSS feed 获取 title 的方法，我使用的是 react-native-rss-parser ( https://www.npmjs.com/package/react-native-rss-parser ):

fetch('https://vnexpress.net/rss/tin-moi-nhat.rss')
     .then((response) => response.text())
     .then((responseData) => rssParser.parse(responseData))
     .then((rss) =>  { 
         this.setState(prevState => ({
             ...prevState,

             title0: rss.items[0] ? rss.items[0].title : '',
             caption0: rss.items[0] ? rss.items[0].description : ''
         }))    
     })

const Feeds = ([
        {
        pic: require('../assets/images/image.jpg'), 
        title: this.state.title0,
        caption: this.state.caption0
      },
])

我正在尝试解析嵌套在描述标记内的description和imageUrl。我该怎么做呢？有什么建议吗？

Answer 1

使用jquery，你可以解析它并获取里面的所有字符串，如果你只需要最后一个字符串，你可以获取nodeNames列表中的最后一个索引

    str = '<a href="https://e.vnexpress.net/news/news/former-cop-gets-18-years-in-prison-for-shooting-civilian-to-death-4020110.html"><img width=130 height=100 src="https://i-english.vnecdn.net/2019/11/30/phuoc146331574997301-157508140-8364-4799-1575086150_180x108.jpg" ></a></br>A Dong Nai court sentenced a former traffic policeman to 18 years in prison on Friday for fatally shooting a man in a family feud.',
    html = $.parseHTML( str ),
    nodeNames = [];

    // Gather the parsed HTML's node names
    $.each( html, function( i, el ) {
        if(el.nodeName=='#text'){
            nodeNames[ i ] = el.nodeValue;
        }else{
            nodeNames[ i ] = el.innerText;
        }
    });
    console.log(nodeNames);

<小时/>

仅使用 js 将返回文本内容

function parseHTML(html) {
    var t = document.createElement('template');
    t.innerHTML = html;
    return t.content.cloneNode(true).textContent;
}