Playwright & NodeJs - 读取 CSV 并将数据推送到数组

Question

我正在使用 playwright 库进行网络抓取，并且 URL 存储在 CSV 文件中。我正在尝试读取 CSV 文件并选择数组中的 URL 以在抓取代码中使用。

这是我写的代码。

// Support    
const csv = require('csv-parser');
const fs = require('fs');

// Array to store the URL.
var urls = [];
// This prints an empty array.
console.log(urls);

fs.createReadStream('sample.csv')
  .pipe(csv())
  .on('data', (row) => {
    // Trying push the URL in the array
    urls.push(row);

    // This prints the values of URLs
    console.log(urls);
  })
  .on('end', () => {
    console.log('CSV file successfully processed');
  });
// Here I don't see the URLs but an empty array.
console.log("URLS:" + urls);  

在方法“.on('data'”) 中，值被推送到数组，控制台也在打印这些值，但是，当我尝试从数组中获取 URL 时，执行后它返回一个空数组。

Answer 1

这个答案是假设你的 CSV 文件中只有链接。

const { test } = require('@playwright/test');
const fs = require("fs");

// Reads the CSV file and saves it  
var links = fs.readFileSync('Path/to/csv')
    .toString() // convert Buffer to string
    .split('\n') // split string to lines
    .map(e => e.trim()) // remove white spaces for each line

// Start of for loop, to loop through csv file
for (const link of links) {
    // Normal test set up for playwright. adding the + link.toString to avoid duplicate test name error
    test('test for ' + link.toString(), async ({ page }) => {
        // First csv file item sent to console
        console.log(link);
        // Goes to that csv link item
        await page.goto(link);
        // Do whatever else you need
    });
}