Web Scraping with Puppeteer. If can't get a selector multiple times go to another element











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I'm saving URLs from a playlist of a video player.



The sequence of actions:




  1. Click on a video

  2. Find video element and get it's src

  3. Add src to an array


Everything is going just fine, but sometimes there is an element I can't get it src from. So what I want to do is to try to get element's src for 5 times and if it fails on the 5th time, then I should push the counter's (i) value in the array instead of the URL and click on the next video and get src of the next element. Please let me know how I can do it.



Here is my current code which clicks one by one and gets element's src and just freezes if it can't get element's src:



const links = await page.evaluate((SELECTORS) => {
return new Promise((resolve, reject) => {
const items = document.querySelector(SELECTORS.list).childNodes;
let i = 0;
const urls = ;
const video = document.querySelector(SELECTORS.video);

let counter = 0;
const limit = 10;
var timer = setInterval(() => {
const url = video.getAttribute('src');
if (!urls.includes(url)) {
urls.push(url);
i++;
if (items[i]) {
setTimeout(items[i].click(), 2000);
} else {
clearInterval(timer);
resolve(urls);
}
}
}, 10);
items[0].click();
});
}, SELECTORS);









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    up vote
    1
    down vote

    favorite












    I'm saving URLs from a playlist of a video player.



    The sequence of actions:




    1. Click on a video

    2. Find video element and get it's src

    3. Add src to an array


    Everything is going just fine, but sometimes there is an element I can't get it src from. So what I want to do is to try to get element's src for 5 times and if it fails on the 5th time, then I should push the counter's (i) value in the array instead of the URL and click on the next video and get src of the next element. Please let me know how I can do it.



    Here is my current code which clicks one by one and gets element's src and just freezes if it can't get element's src:



    const links = await page.evaluate((SELECTORS) => {
    return new Promise((resolve, reject) => {
    const items = document.querySelector(SELECTORS.list).childNodes;
    let i = 0;
    const urls = ;
    const video = document.querySelector(SELECTORS.video);

    let counter = 0;
    const limit = 10;
    var timer = setInterval(() => {
    const url = video.getAttribute('src');
    if (!urls.includes(url)) {
    urls.push(url);
    i++;
    if (items[i]) {
    setTimeout(items[i].click(), 2000);
    } else {
    clearInterval(timer);
    resolve(urls);
    }
    }
    }, 10);
    items[0].click();
    });
    }, SELECTORS);









    share|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I'm saving URLs from a playlist of a video player.



      The sequence of actions:




      1. Click on a video

      2. Find video element and get it's src

      3. Add src to an array


      Everything is going just fine, but sometimes there is an element I can't get it src from. So what I want to do is to try to get element's src for 5 times and if it fails on the 5th time, then I should push the counter's (i) value in the array instead of the URL and click on the next video and get src of the next element. Please let me know how I can do it.



      Here is my current code which clicks one by one and gets element's src and just freezes if it can't get element's src:



      const links = await page.evaluate((SELECTORS) => {
      return new Promise((resolve, reject) => {
      const items = document.querySelector(SELECTORS.list).childNodes;
      let i = 0;
      const urls = ;
      const video = document.querySelector(SELECTORS.video);

      let counter = 0;
      const limit = 10;
      var timer = setInterval(() => {
      const url = video.getAttribute('src');
      if (!urls.includes(url)) {
      urls.push(url);
      i++;
      if (items[i]) {
      setTimeout(items[i].click(), 2000);
      } else {
      clearInterval(timer);
      resolve(urls);
      }
      }
      }, 10);
      items[0].click();
      });
      }, SELECTORS);









      share|improve this question













      I'm saving URLs from a playlist of a video player.



      The sequence of actions:




      1. Click on a video

      2. Find video element and get it's src

      3. Add src to an array


      Everything is going just fine, but sometimes there is an element I can't get it src from. So what I want to do is to try to get element's src for 5 times and if it fails on the 5th time, then I should push the counter's (i) value in the array instead of the URL and click on the next video and get src of the next element. Please let me know how I can do it.



      Here is my current code which clicks one by one and gets element's src and just freezes if it can't get element's src:



      const links = await page.evaluate((SELECTORS) => {
      return new Promise((resolve, reject) => {
      const items = document.querySelector(SELECTORS.list).childNodes;
      let i = 0;
      const urls = ;
      const video = document.querySelector(SELECTORS.video);

      let counter = 0;
      const limit = 10;
      var timer = setInterval(() => {
      const url = video.getAttribute('src');
      if (!urls.includes(url)) {
      urls.push(url);
      i++;
      if (items[i]) {
      setTimeout(items[i].click(), 2000);
      } else {
      clearInterval(timer);
      resolve(urls);
      }
      }
      }, 10);
      items[0].click();
      });
      }, SELECTORS);






      javascript web-scraping puppeteer






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      asked Nov 8 at 13:53









      Bong2000

      385




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