MongoDB Atlas provides a set of API endpoints that can be used to access the database hosted on Atlas without the need for database drivers; great for minimal memory footprint, especially on serverless infrastructures such as AWS Lambda.
[Read More]SignatureDoesNotMatch: The request signature we calculated does not match the signature you provided. Check your key and signing method.
Same code working locally, but not on a remote server. Migrating aws-sdk to @aws-sdk/client-s3
Using AWS S3 functionality in our node application, this issue suddenly broke our functionality for no plausible reason. The strange aspect was that the same thing worked correctly on the local server, but any remote server would throw this error.
[Read More]Exactly Same Query Behaving Differently in Mongo Client and Mongoose
Understanding Mongoose's strict schema handling
You might notice that the same query behaves differently in a MongoDB client, like Compass or mongo shell, compared to when using Mongoose within a Node.js application. Below is one such scenario.
[Read More]AWS Layer: Generate nodejs Zip Layer File Based on the Lambda's Dependencies
We want to create an AWS layer zip file containing all the node_modules used by a particular AWS lambda function.
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]JavaScript Rollbar: Unknown Unhandled Rejection Error Getting Reason From Event
Possible fixes to get rid of this error from reporting
In JavaScript applications with Rollbar integrated for reporting, you might see a common recurrence of the following error:
[Read More]Remove Eslint Warnings For Dynamic Imports
import/no-dynamic-require & global-require
In JavaScript applications, such as Node and React JS, you might see or use code that requires static files dynamically. As a result, ESlint throws two warnings unless you mute them. The warnings are:
Calls to require() should use string literals eslint(import/no-dynamic-require).
[Read More]
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.
[Read More]
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.
[Read More]
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