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：
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:
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 JSONconst 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
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