繁体   English   中英

使用PhantomJS访问HTML中的JS全局变量的值

[英]Accessing values of JS Global variables in HTML with PhantomJS

所以我有一段HTML看起来像这样:

<html>
  <body>
    <script>
      var foo = {
        bar: []
      };
    </script>
  </body>
</html>

我正在尝试使用PhantomJS提取foo.bar的值。 我该怎么做? 到目前为止,我知道我的结构如下:

var webPage = require('webpage'); 
var page = webPage.create();
page.open(MY_URL, function(status) {
  var foo = page.evaluate(function(){
    //gets javascript from the HTML in the response
    // and extracts foo from there
  });
});

console.log(someVar);
phantom.exit();

似乎您应该可以使用

var foo = page.evaluate(function() {
  return window.foo
})
console.log('foo =', foo)

这是您的做法,从幻影虚拟浏览器打开url,并从带有幻影的网页获取javascript返回值

const phantom = require('phantom');


openUrl = (req, res, next) => {
    let url = 'your url goes here';
    const {content, returnedFromPage} = await loadJsSite(url);
    return res.json(returnedFromPage);
}

loadJsSite = async (url) => {
  return new Promise( async (resolve, reject) => {

    const instance = await phantom.create();
    const page = await instance.createPage();
    await page.on('onResourceRequested', function(requestData) {
      console.info('Requesting', requestData.url);
    });

    const status = await page.open(url);
    var returnedFromPage = await page.evaluate(function() {
            return document.title;
        });
    const content = await page.property('content');

    await instance.exit();

    return resolve({content: content, returnedFromPage: returnedFromPage});

  })
}

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM