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javascript - 尝试使用 Selenium 和 Node JS 获取 HREF

问题描述

无法使用.getAttribute("href")从我的 Web 元素中获取 href 。我可以让它在单个变量上工作，但不是在它循环遍历我的数组时。

const {Builder, By, Key, until} = require('selenium-webdriver');

(async function example() {
    let driver = await new Builder().forBrowser('chrome').build();
    try {
        // Navigate to webscraper.io
        await driver.get('https://webscraper.io/test-sites');

        // Scrape links
        let links = await driver.findElements(By.xpath('//*[@class="row test-site"]/div/h2/a'))
        
        // loop through links and print
        console.log('\nFound ' + links.length + ' Links total.\n')  
        for (let index = 0; index < links.length; index++) {
            console.log(links[index].getAttribute("href"));         
        }
    }
    finally{
        driver.quit();
    }
})();

我收到以下错误：

Promise { <pending> }
Promise { <pending> }
Promise { <pending> }
Promise { <pending> }
Promise { <pending> }
Promise { <pending> }
Promise { <pending> }
(node:81217) UnhandledPromiseRejectionWarning: Error: ECONNREFUSED connect ECONNREFUSED 127.0.0.1:54431
    at ClientRequest.<anonymous> (/Users/eric/Dropbox/Javascript/node_modules/selenium-webdriver/http/index.js:262:15)
    at ClientRequest.emit (events.js:315:20)
    at Socket.socketErrorListener (_http_client.js:469:9)
    at Socket.emit (events.js:315:20)
    at emitErrorNT (internal/streams/destroy.js:106:8)
    at emitErrorCloseNT (internal/streams/destroy.js:74:3)
    at processTicksAndRejections (internal/process/task_queues.js:80:21)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:81217) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)

标签： javascriptnode.jsselenium-webdriver

解决方案

将await添加到 console.log 行并且它起作用了。

console.log(等待链接[index].getAttribute("href"));

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