[英]Puppeter - Link inside an iFrame
我必須在此頁面的要點下方找到廣告鏈接。
我正在與Puppeter一起嘗試,但由於廣告是iframe,因此遇到了麻煩!
我可以使用Chrome控制台成功獲得所需的東西:
document.querySelector('#adContainer a').href
Puppetter
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
page.setViewport({width: 1440, height: 1000})
await page.goto('https://www.amazon.co.uk/dp/B07DDDB34D', {waitUntil: 'networkidle2'})
await page.waitFor(2500);
const elementHandle = await page.$eval('#adContainer a', el => el.href);
console.log(elementHandle);
await page.screenshot({path: 'example.png', fullPage: false});
await browser.close();
})();
錯誤:錯誤:找不到與選擇器“ #adContainer a”匹配的元素
編輯:
const browser = await puppeteer.launch();
const page = await browser.newPage();
page.setViewport({width: 1440, height: 1000})
await page.goto('https://www.amazon.co.uk/dp/B07DDDB34D', {waitUntil: 'networkidle2'})
const adFrame = page.frames().find(frame => frame.name().includes('"adServer":"cs'))
const urlSelector = '#sp_hqp_shared_inner > div > a';
const url = await adFrame.$eval(urlSelector, element => element.textContent);
console.log(url);
await browser.close();
您需要在框架內部進行查詢,可以通過page.frames()進行訪問:
const adFrame = page.frames().find(frame => frame.name().includes('<some text only appearing in name of this iFrame>');
const urlSelector = '#sp_hqp_shared_inner > div > a';
const url = await adFrame.$eval(urlSelector, element => element.textContent);
console.log(url);
告白,我自己還沒有嘗試過。 另外,我認為在iFrame中獲取該url的適當方法是這樣的 :
const url = await adFrame.evaluate((sel) => {
return document.querySelectorAll(sel)[0].href;
}, urlSelector);
每次頁面加載時,您都必須切換到要處理的框架。
async getRequiredLink() {
return await this.page.evaluate(() => {
let iframe = document.getElementById('frame_id'); //pass id of your frame
let doc = iframe.contentDocument; // changing the context to the working frame
let ele = doc.querySelector('you-selector'); // selecting the required element
return ele.href;
});
}
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