Using puppeteer to implement webpage screenshot function on linux (centos)

You may encounter the following problems when installing puppeteer on Linux. This article will guide you how to get out of the pit!

> puppeteer@2.0.0 install /www/node_modules/puppeteer
> node install.js

ERROR: Failed to download Chromium r706915! Set "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" env variable to skip download.
{ Error: EACCES: permission denied, mkdir '/www/node_modules/puppeteer/.local-chromium'
-- ASYNC --
at BrowserFetcher.<anonymous> (/www/node_modules/puppeteer/lib/helper.js:111:15)
at Object.<anonymous> (/www/node_modules/puppeteer/install.js:62:16)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Function.Module.runMain (module.js:676:10)
at startup (bootstrap_node.js:187:16)
at bootstrap_node.js:608:3
errno: -13,
code: 'EACCES',
syscall: 'mkdir',
path: '/www/node_modules/puppeteer/.local-chromium' }
npm WARN enoent ENOENT: no such file or directory, open '/www/package.json'
npm WARN www No description
npm WARN www No repository field.
npm WARN www No README data
npm WARN www No license field

The process I successfully installed puppeteer and actually took screenshots is as follows:

1. Install nodejs and npm

# Download and decompress wget -c https://nodejs.org/dist/v8.9.1/node-v8.9.1-linux-x64.tar.xz
tar -xvf node-v8.9.1-linux-x64.tar.xz
# Move and rename (optional)
mv node-v8.9.1-linux-x64 /www/nodejs
# Create a soft link (shortcut). If the name in the previous step is different, adjust the underlined part of this step according to the actual situation. ln -s /www/nodejs/bin/node /usr/local/bin/node
ln -s /www/nodejs/bin/npm /usr/local/bin/npm

2. Install chromium

yum install chromium

3. Install puppeteer-core (direct installation of puppeteer will result in an error because chromium cannot be downloaded)

npm i puppeteer-core

4. Create a new a.js

const puppeteer = require('puppeteer-core');
(async () => {
 const browser = await puppeteer.launch({
 executablePath: '/usr/bin/chromium-browser',
 args:["--no-sandbox"]
 });
 const page = await browser.newPage();
 await page.goto('https://www.baidu.com');
 await page.screenshot({path: 'example.png'});
 await browser.close();
})();

The code in this step may be different from the one on the Internet. One is that the code in require is puppeteer-core instead of puppeteer, because we installed puppeteer-core instead of puppeteer

The other is that there are two parameters in launch. The first parameter is also because we did not install puppeteer directly, so we need to specify the path. The second parameter is due to some limitations of chromium, and the root account needs to add this parameter to execute

5. Execute a.js

node a.js

After execution, you can see an example.png

Note: If there is Chinese on the page, it may not display properly due to the lack of Chinese fonts. The solution is to directly upload the Chinese fonts in c:/windows/fonts on your computer to /usr/share/fonts/chinese on the server (there is no Chinese directory by default, so you can create one yourself). : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :

Puppeter related documents https://pptr.dev/

Summarize

The above is what I introduced to you about using puppeteer on Linux (centos) to realize the webpage screenshot function. I hope it will be helpful to you!