Selenium的JavascriptExecutor没有返回任何内容。

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英文:

Selenium JavascriptExecutor doesnt return anything

问题

我初始化了一个JavascriptExecutor,但它没有返回我想要的内容。对象始终为空。

SeleniumDriver driver = new SeleniumDriver(DriverType.ChromeDriver);
driver.get("https://www.xxxxxx.info/");
driver.waitForPageToBeLoaded();

JavascriptExecutor js = (JavascriptExecutor) driver.getWebDriver();
Object ob = js.executeScript("___grecaptcha_cfg.clients[0]");

这是控制台中显示的内容:

Selenium的JavascriptExecutor没有返回任何内容。

为什么我无法通过JavascriptExecutor获取它?

英文:

I initialized a JavascriptExecutor but it doesn't return me what I want. Object is always null.

SeleniumDriver driver = new SeleniumDriver(DriverType.ChromeDriver);
    driver.get("https://www.xxxxxx.info/");
    driver.waitForPageToBeLoaded();
        
    JavascriptExecutor js = (JavascriptExecutor) driver.getWebDriver();
    Object ob = js.executeScript("___grecaptcha_cfg.clients[0]");

Here what it gives me in console:

Selenium的JavascriptExecutor没有返回任何内容。

Why am I not able to get it via JavascriptExecutor?

答案1

得分: 2

// 你的 JS 脚本应该返回它。尝试以下更改

Object ob = js.executeScript("return ___grecaptcha_cfg.clients[0];");

所以你的代码将会是这样的

SeleniumDriver driver = new SeleniumDriver(DriverType.ChromeDriver);
driver.get("https://www.xxxxxx.info/");
driver.waitForPageToBeLoaded();
        
JavascriptExecutor js = (JavascriptExecutor) driver.getWebDriver();
Object ob = js.executeScript("return ___grecaptcha_cfg.clients[0];");

因为它是一个 JS 对象 JSON所以它会抛出循环引用异常

你可以使用以下 JS 代码将其转换为 JSON

const getCircularReplacer = () => {
  const seen = new WeakSet();
  return (key, value) => {
    if (typeof value === "object" && value !== null) {
      if (seen.has(value)) {
        return;
      }
      seen.add(value);
    }
    return value;
  };
};
JSON.stringify(___grecaptcha_cfg.clients[0], getCircularReplacer());

由于它是跨域 iframe你可以像下面的代码一样使用它因为 Chrome 会阻止它如下面的图片所示

[![enter image description here][1]][1]
英文:

Your js script should return it.try the below changes

Object ob = js.executeScript("return ___grecaptcha_cfg.clients[0]");

so that your code will be like

SeleniumDriver driver = new SeleniumDriver(DriverType.ChromeDriver);
driver.get("https://www.xxxxxx.info/");
driver.waitForPageToBeLoaded();
    
JavascriptExecutor js = (JavascriptExecutor) driver.getWebDriver();
Object ob = js.executeScript("return ___grecaptcha_cfg.clients[0]");

Since it is the JS object json it throws circular reference exception

You can convert to json using below js code

const getCircularReplacer = () => {
  const seen = new WeakSet();
  return (key, value) => {
    if (typeof value === "object" && value !== null) {
      if (seen.has(value)) {
        return;
      }
      seen.add(value);
    }
    return value;
  };
};
JSON.stringify(___grecaptcha_cfg.clients[0], getCircularReplacer());

Since it is cross origin iframe you can use it as chrome blocks it as shown in image below

Selenium的JavascriptExecutor没有返回任何内容。

huangapple
  • 本文由 发表于 2020年9月1日 19:18:49
  • 转载请务必保留本文链接:https://go.coder-hub.com/63686622.html
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