I am using Vue3.js. I need to open a PDF in a new window, then open the print dialog but this only works on MS Edge and Google Chrome, but does not work on Firefox or Safari.
const getBlobPdf = async (url: string) => {
const response = await axios.get(url, { responseType: "blob" });
return new Blob([response.data], { type: "application/pdf" });
};
const printPdf = async ({ url }) => {
const blob = await getBlobPdf(url);
window.open(URL.createObjectURL(blob), "_blank")?.print();
};
I had tried window.focus(); window.print(); but didn't work.
I found a way to make it work on Firefox and Safari. But I don't know if there is another way without using setTimeout()
const printPdf = async ({ url }) => {
const blob = await getBlobPdf(url);
const printWin = window.open(URL.createObjectURL(blob), "_blank");
if (printWin) {
setTimeout(() => {
printWin.print();
}, 200);
}
};
Related
Hi Guys can you please point my mistake on this code?
console.log(urls) is printing undefined.
Thanks in advance.
const puppeteer = require('puppeteer');
async function GetUrls() {
const browser = await puppeteer.launch( { headless: false,
executablePath: 'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe' })
const page = await browser.newPage();
await page.goto("https://some page");
await page.waitForSelector('a.review.exclick');
let urls = await page.evaluate(() => {
let results = [];
let items = document.querySelectorAll('a.review.exclick');
items.forEach((item) => {
results.push({
url: item.getAttribute('href'),
});
});
return results;
browser.close();
});
}
(async () => {
let URLS = await GetUrls();
console.log(URLS);
process.exit(1);
})();
Here is a list:
you don't have a return statement in your GetUrls() function
you close the browser after a return statement AND inside the page.evaluate() method
Keep in mind that anything that is executed within the page.evaluate() will relate to the browser context. To quickly test this, add a console.log("test") before let results = []; and you will notice that nothing appears in your Node.js console, it will appear in your browser console instead.
Therefore, the browser variable is visible within the GetUrls() function but NOT visible within the page.evaluate() method.
Here is the corrected code sample:
const puppeteer = require('puppeteer');
async function GetUrls() {
const browser = await puppeteer.launch({
headless: false,
executablePath: 'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe'
})
const page = await browser.newPage();
await page.goto("https://some page");
await page.waitForSelector('a.review.exclick');
let urls = await page.evaluate(() => {
let results = [];
let items = document.querySelectorAll('a.review.exclick');
items.forEach((item) => {
results.push({
url: item.getAttribute('href'),
});
});
return results;
});
await browser.close();
return urls;
}
(async () => {
let URLS = await GetUrls();
console.log(URLS);
process.exit(1);
})();
Any existing sample on how to use puppeteer with nordVpn ?
I tried that:
page = await browser.newPage();
await useProxy(page, `socks5://login:password}#fr806.nordvpn.com:1080`);
I also tried:
'--proxy-server=socks5://login:password#fr806.nordvpn.com:1080'
This script works, you need to change the user/pass to yours... these are not your Nord user/pass... you need to get the service/api ones from in your account settings. Change the server to whatever one you need to use.
#!/usr/bin/env node
// Screengrab generator
// outputs a JSON object with a base64 encoded image of the screengrab
// eg;
const puppeteer = require('puppeteer');
let conf = new Object();
conf.url = "https://www.telegraph.co.uk";
// VPN
conf.vpnUser = conf.vpnUSer || 'USERNAME';
conf.vpnPass = conf.vpnPass || 'PASSWORD';
conf.vpnServer = conf.vpnServer || "https://uk1785.nordvpn.com:89";
(async() => {
const browser = await puppeteer.launch({
headless: true,
args: [
'--disable-dev-shm-usage',
'--proxy-server='+conf.vpnServer
]
});
try {
const page = await browser.newPage();
await page.authenticate({
username: conf.vpnUser,
password: conf.vpnPass,
});
await page.goto(conf.url, { waitUntil: 'networkidle2' });
} catch (error) {
console.error(error);
} finally {
await browser.close();
}
})();
I'm using puppeteer and I have a little problem that once in a while new tab with ad appears, and stops the whole script. I'm looking for a way to basically detect when 3rd tab in browser window is open and close this 3rd tab (It is always the 3rd - first is blank, second is my page that i need and third is this ad).
Try something like this:
import puppeteer from 'puppeteer';
const browser = await puppeteer.launch({ headless: false });
try {
browser.addListener('targetcreated', async (target) => {
if (target.type() !== 'page') return;
const properOrigin = 'https://example.org';
const pageUrl = target.url();
if (new URL(pageUrl).origin === properOrigin) return;
console.log(`Closing page ${pageUrl}...`);
const newPage = await target.page();
await newPage.waitForTimeout(3000);
await newPage.close();
console.log(`Page ${pageUrl} closed.`);
});
const [mainPage] = await browser.pages();
await mainPage.goto('https://example.org/');
await mainPage.evaluate(() => {
window.open('https://google.com');
});
} catch (err) { console.error(err); }
I am currently doing a project that needs to scrape a data from the search result in carousell.ph
I basically made a sample HTML and replicate the output HTML of carousell, so far the javascript work except when I tried to migrate it using puppeteer it always gives me an error.
The task is basically get all the product list from the search url "https://www.carousell.ph/search/iphone"
Here's the code I made.
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch()
const page = await browser.newPage()
let url = 'https://www.carousell.ph/search/iphone';
await page.goto(url, {waitUntil: 'load', timeout: 10000});
await page.setViewport({ width: 2195, height: 1093 });
await page.screenshot({ fullPage: true, path: 'carousell.png' });
document.querySelectorAll('main').forEach(main => {
main.querySelectorAll('a').forEach(product => {
const product_details = product.querySelectorAll('p');
const productName = product.textContent;
const productHref = product.getAttribute('href');
console.log(product_details[0].textContent + " - "+ product_details[1].textContent);
});
});
await browser.close()
})()
As #hardkoded stated, document is not something that is out of the box in puppeteer, it's dogma in the browser, but not in Node.js. You also do not need to for each in Node.js. The Map Technique outlined in this video is very helpful and quick. I'd make sure also to keep await on your loop or map technique, because the function is asynchronous so you want to make sure the promise comes back resolved.
Map technique
An extremely fast way to get many elements into an array from a page is to use a function like below. So instead of getting an array of the elements and then looping them for their properties. You can create a function like this below using $$eval and map. The result is a formatted JSON array that takes all the looping out of the equation.
const links = await first_state_list.$$eval("li.stateList__item", links =>
links.map(ele2 => ({
State_nme: ele2.querySelector("a").innerText.trim(), //GET INNER TEXT
State_url: ele2.querySelector("a").getAttribute("href") //get the HREF
}))
);
Already made it work.
const puppeteer = require('puppeteer');
async function timeout(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
(async () => {
const browser = await puppeteer.launch()
const page = await browser.newPage();
let searchItem = 'k20&20pro';
let carousellURL = 'https://www.carousell.ph/search/' + searchItem;
await page.goto(carousellURL, {waitUntil: 'load', timeout: 100000});
//await page.goto(carousellURL, {waitUntil: 'networkidle0'});
await page.setViewport({
width: 2195,
height: 1093
});
await page.evaluate(() => {
window.scrollBy(0, window.innerHeight);
})
await timeout(15000);
await page.screenshot({
fullPage: true,
path: 'carousell.png'
});
var data = await page.evaluate(() =>
Array.from(
document.querySelectorAll('main div a:nth-child(2)')).map(products => products.href
)
)
var i;
for (i = 0; i < data.length; i++) {
console.log(data[i]);
// comment this section but this will open the page to get product details.
//await page.goto(data[1], {"waitUntil" : "networkidle0"});
// inner product page details
// this will get the title
// document.querySelectorAll('h1')[0].innerText;
// this will get the amount
// document.querySelectorAll('h2')[0].innerText;
// this will get the description
// document.querySelectorAll('section div div:nth-child(4) p')[0].innerText;
// this will get sellers name
// document.querySelectorAll('div div:nth-child(2) a p')[0].innerText;
let ss_filename = 'carousellph_'+searchItem+'_'+i+'.png';
console.log(ss_filename);
console.log("\r\n");
//await page.screenshot({ fullPage: false, path: ss_filename });
}
await browser.close()
})()
I trying to collect data from failing requests and js error.
I'm using the following site: https://nitzani1.wixsite.com/marketing-automation/3rd-page
The site has a request to https://api.fixer.io/1latest, which returns a status code of 404,
also the page contains thw following js error:
"Uncaught (in promise) Fetch did not succeed"
I've tried to code bellow to catch the 404 and js error but couldn't.
Not sure what I'm doing wrong, any idea as to how to solve it?
const puppeteer = require('puppeteer');
function wait (ms) {
return new Promise(resolve => setTimeout(() => resolve(), ms));
}
var run = async () => {
const browser = await puppeteer.launch({
headless: false,
args: ['--start-fullscreen']
});
page = await browser.newPage();
page.on('error', err=> {
console.log('err: '+err);
});
page.on('pageerror', pageerr=> {
console.log('pageerr: '+pageerr);
});
page.on('requestfailed', err => console.log('requestfailed: '+err));
collectResponse = [];
await page.on('requestfailed', rf => {
console.log('rf: '+rf);
});
await page.on('response', response => {
const url = response.url();
response.buffer().then(
b => {
// console.log(url+' : '+response.status())
},
e => {
console.log('response err');
}
);
});
await wait(500);
await page.setViewport({ width: 1920, height: 1080 });
await page.goto('https://nitzani1.wixsite.com/marketing-automation/3rd-page', {
});
};
run();
The complete worked answer is:
const puppeteer = require('puppeteer');
const run = async () => {
const browser = await puppeteer.launch({
headless: true
});
const page = await browser.newPage();
// Catch all failed requests like 4xx..5xx status codes
page.on('requestfailed', request => {
console.log(`url: ${request.url()}, errText: ${request.failure().errorText}, method: ${request.method()}`)
});
// Catch console log errors
page.on("pageerror", err => {
console.log(`Page error: ${err.toString()}`);
});
// Catch all console messages
page.on('console', msg => {
console.log('Logger:', msg.type());
console.log('Logger:', msg.text());
console.log('Logger:', msg.location());
});
await page.setViewport({ width: 1920, height: 1080 });
await page.goto('https://nitzani1.wixsite.com/marketing-automation/3rd-page', { waitUntil: 'domcontentloaded' });
await page.waitFor(10000); // To be sure all exceptions logged and handled
await browser.close();
};
run();
Save in .js file and easily run it.
Current puppeteer 8.0.0^ have a very small amount of information in message.text(). So we need to get a description of the error from JSHandle.
Please check this comment with fully descriptive console errors from JSHandle object
Check the link here https://stackoverflow.com/a/66801550/9026103