如何保存 cookie 并将其加载到另一个 puppeteer 会话中?

问题描述

我必须两次请求相同的网页才能在第一个请求中获取 cookie，并在以下示例的第二个请求中使用它.

I had to request the same webpage twice to get the cookies in the 1st request and use it in the 2nd request in the following example.

谁能告诉我在一个 puppeteer 会话中保存 cookie 并在另一个会话中加载它的代码，这样就不需要在第二个会话中两次请求相同的网页?谢谢.

Could anybody show me the code to save the cookies in one puppeteer session and load it in another session so that there is no need to request the same webpage twice in the 2nd session? Thanks.

const puppeteer = require('puppeteer');

(async () => {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.goto('https://www.genecards.org/cgi-bin/carddisp.pl?gene=BSCL2');
    await page.goto('https://www.genecards.org/cgi-bin/carddisp.pl?gene=BSCL2');

    const linkHandlers = await page.$x("//div[@id='enhancers']//a[@data-track-event='Table See-All']");

    if (linkHandlers.length > 0) {
        const [response] = await Promise.all([
            page.waitForResponse(response => response.url().includes('/gene/api/data/Enhancers')),
            linkHandlers[0].click()
        ]);
        const resp_text = await response.text();
        console.log(resp_text);
    } else {
        throw new Error("Link not found");
    }
    await browser.close();
})();

推荐答案

要保存 cookie，可以使用功能 page.cookies. 要重复使用 cookie，您可以使用 page.setCookies 函数.

To save the cookies, you can use the function page.cookies. To reuse the cookies, you can use the page.setCookies function.

将 cookie 保存到磁盘

const fs = require('fs').promises;

// ... puppeteer code
const cookies = await page.cookies();
await fs.writeFile('./cookies.json', JSON.stringify(cookies, null, 2));

这将读取当前 URL 的 cookie 并通过 JSON.stringify 和 fs.writeFile 将它们保存到磁盘.

This will read the cookies for the current URL and save them to disk via JSON.stringify and fs.writeFile.

重复使用 cookie

const fs = require('fs').promises;

// ... puppeteer code
const cookiesString = await fs.readFile('./cookies.json');
const cookies = JSON.parse(cookiesString);
await page.setCookie(...cookies);

要重复使用 cookie，请通过 fs.readFile 从磁盘读取文件.然后通过JSON.parse解析文件内容.之后，您必须调用 page.setCookie 函数.由于该函数将 cookie 作为参数(而不是作为 cookie 的一个数组参数)，我们依赖于 spread operator，它允许使用给定的 cookies 数组作为单独的参数调用 setCookie 函数.

To reuse the cookies, read the files from the disk via fs.readFile. Then parse the file content via JSON.parse. After that you have to call the page.setCookie function. As the function expects the cookies as arguments (and not as one array argument with cookies), we rely on the spread operator, which allows to call the setCookie function with the given cookies array as individual arguments.

这篇关于如何保存 cookie 并将其加载到另一个 puppeteer 会话中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！