In Node JS HTML to PDF conversion, Populate Images From URLs
Using axios and base64 conversion
In continuation of my previous post Convert HTML to PDF in Node JS without headless browser, I will show you how can we can fetch the images from URL, convert them into base64 string, and populate them in the HTML that is then converted into PDF.
[Read More]Convert HTML to PDF in Nodejs
Without Puppeteer, phantomjs or any other headless browser.
To convert an HTML to PDF in the backend, you usually need a headless browser like Puppeteer or phantomjs. The downside of headless browsers is that they are resource intensive. If you need to convert an HTML in Nodejs, is there a way to do so without them? The answer is yes but with a caveat: The HTML should be relatively simple, and you will only have a few options to style the document.
[Read More]Nodejs Script to Add Rows in CSV File Through Terminal
Filling out a CSV file through Office Excel or LibreOffice Calc is easy enough, but you may find it quicker to type in fields on a terminal, particularly when you want to process the data before entry, use defaults, or keep the entry process totally mouse-free.
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How to Run Nightmare JS On Remote Linux Server
Nightmare JS is a browser automation tool. It works perfectly on local machine and even has an option to view the browser in action by passing { show: true } option when initializing Nightmare. On remote linux machine, however, it will not work without installing and including an extra package xvfb.
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How to Deal With Nightmare JS Zombie Electron Processes
Nightmare JS leaves in its wake zombie electron processes and memory leaks
Nightmare JS is a great browser automation library, especially effective for scrapping websites. It has two faults though: memory leaks and zombie electron processes.
But with a duct-tape hacks we can easily overcome both. For memory leak, which is minor but builds up over time, daily restart of the node script or app is pretty effective and avoids solutions that are overkill.
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Restart Pm2 Process Every Day Using A Node Script
A brute force yet effective way to restart scripts that need it
To run NodeJS scripts and apps constantly, we usually use pm2 (some prefer forever). However, some scripts require a brute force restart from time to time as they do not fare better in uninterrupted longer runs. Mostly, the reason is memory leaks of packages you are bound to use but have no control over.
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Trace Redirect Urls NPM Request
With NPM request module it is quite easy to observe and trace all the intermediate urls before the final url is reached. We can do that using followRedirect option, which takes either true or false, or a function that should return a boolean value.
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Clean Up MongoDB Of Old Inactive Users And Their Data With Node Js Script
Reduce Expensive Database Space By Pruning Never-To-Be-Used-Again Data
Databases are not cheap, especially when your application is just taking off and you are low on budget. It is then that freeing up retrievable and precious space from the database is a good way to save some dollars for a while.
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Build Queue For Processing Webhooks With Node Js And MongoDB
Manage The Flood Of Webhooks With A Database Queue
Many of the third party services we integrate in our applications use webhooks to communicate events to us. Responding to the incoming webhook with success response (status 200) is all that is required to acknowledge the receipt of the webhook. To process that webhook immediately upon receiving or entering it in a queue to be processed later is up to you.
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