Invalid header value char. Have you ever seen this error? I have, and it's taken me some hours to figure out what was going on. I hope this post will help you to avoid the same mistake I made.

AxiosError, Parse Error, Invalid header value char

AWS Aurora Serverless is a fully managed, auto-scaling configuration of Aurora that automatically starts up, shuts down, and scales the compute resources based on your application's needs. In this article, we will learn how to create an Aurora Serverless V2 with AWS CDK.

Aurora Serverless V2 with AWS CDK

How to enable CORS in AWS API Gateway + Lambda proxy integration with AWS CDK in a few lines of code.

Enable CORS in AWS API Gateway + Lambda proxy integration with AWS CDK

How to add Google Adsense to Next.js, refreshed ads when the user navigates to a new page. In this tutorial, we will use the Next.js router to detect when the user navigates to a new page and then refresh the ads.

Add Google Adsense to Next.js, refreshed ads

Stateful vs Stateless. The Key Differences between Stateful and Stateless APIs. What are the differences between stateful and stateless APIs? What are the pros and cons of each?

API Ultimate Guide, Stateful vs Stateless. The Key Differences

A step-by-step guide on how to build a video thumbnailer using AWS Lambda and Fargate using AWS CDK. The application will be able to process multiple videos in parallel and store the thumbnails in S3.

Video Thumbnailer with AWS Lambda and Fargate using AWS CDK

Learn how to deploy a web server to AWS EC2 using AWS CDK. This tutorial provides step-by-step instructions for setting up the development environment, initializing a CDK project, writing the necessary code, and deploying the web server.

Deploying a Web Server to AWS EC2 with AWS CDK. Step-by-step.

In this blog post, we will explore how to enhance application security using cdk_nag with AWS CDK. Learn how to identify and address security issues in your CDK application to ensure a secure deployment.

Optimizing Application Security. A Guide to Using cdk_nag with AWS CDK

Autocomplete functionality, as seen on platforms like YouTube, can greatly enhance the user experience by providing real-time suggestions while typing. In this blog post, we'll explore how to implement autocomplete using Elasticsearch, a powerful search engine, in combination with Node.js. We'll cover the steps involved and provide code samples and pseudo code to help you get started.

Implementing Autocomplete with Elasticsearch and Node.js

Learn how to change field types in Elasticsearch with a step-by-step guide. Create a new index, define the desired field mapping, reindex the data, and optionally delete the old index. Ensure data integrity and minimize the risk of data loss.

Changing Field Types in Elasticsearch

In this post, we'll show you how to validate request parameters and body in Amazon API Gateway using AWS CDK. This can help to prevent errors and security vulnerabilities.

Validating Request Parameters and Body in Amazon API Gateway with AWS CDK

I have been using AWS S3 for web hosting for a few years now. I have found it to be a great solution for hosting static websites, but it's not without its limitations. In this article, I'll explore the benefits and limitations of using AWS S3 for web hosting.

Using AWS S3 for Web Hosting - Benefits and Limitations

This blog post gives an overview of how to connect an AWS Lambda function to an RDS instance to perform database operations. We will explore how to connect Lambda to RDS over the Internet or VPC, and how to make RDS publicly accessible.

Connecting AWS Lambda with Amazon RDS using AWS CDK and Node.js

This article explains how to handle SSL/TLS certificate verification errors that occur when making HTTPS requests in Node.js using Axios. The article recommends passing a custom httpsAgent option with rejectUnauthorized set to false to disable SSL/TLS certificate verification. However, the article emphasizes the importance of enabling certificate verification in production environments to ensure data security.

How to Use Axios to Handle SSL/TLS Certificate Verification Errors in Node.js

Retry with exponential backoff is a technique to handle network errors by retrying a failed request after waiting for an increasing amount of time between each retry attempt. In Node.js, you can implement retry with exponential backoff using the retry module or by building your own implementation. This technique is useful for dealing with unreliable networks or services that occasionally fail.

How to Implement Retry with Exponential Backoff in Node.js

Amazon API Gateway integration with AWS WAF is a great way to protect your APIs from common web exploits that could affect application availability, compromise security, or consume excessive resources.

Amazon API Gateway integration with AWS WAF

Recently, I worked on a project that required users to be able to sign in with their Google account and users to be able to link their Google account with their Cognito account. I found that there is not much information on the internet about how to do this. So I decided to write this article to share my experience. I will show you how to link a Cognito account with a Google account in the front end and back end.

How to link a Cognito account with a Google account(source code full stack)

Do you want to code anywhere? AWS Cloud9 is a great tool for developers who want to code anywhere. It's a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser. It comes with a powerful code editor, debugger, and terminal. You can create and switch between multiple Cloud9 environments that include a full-fledged Linux server, code editor, and terminal. You can also connect to your existing AWS resources from within the IDE.

Code anywhere. AWS Cloud9

Recently, AWS Lambda announced that it supports Node.js 18 and it is available in all AWS regions. This is a big news for Node.js developers. It means that we can use the latest version of Node.js in AWS Lambda. However, should we update the version of Node.js in the Lambda runtime? Let's find out.

AWS Lambda support Node.js 18 now.

Nuxt3 is going release and it's still in beta. But it's already possible to use it with Quasar 2. This article will show you how to do it.

Quasar 2 with Nuxt3 (Starter Template)

Node.js v16.15.0 has been released with the fetch API. This is a great news for developers who want to use fetch API in node.js. In this article, we will see how to use fetch API in node.js.

Finally, we can use fetch API in node.js

How to publish an npx command to npm. This is a quick guide on how to publish an npx command to npm.

Publishing an npx command to npm.

API Gateway Access logs are a feature of API Gateway that allows you to log all requests made to your API. This is a great feature to have enabled for debugging purposes. In this blog post, we will go over how to enable API Gateway Access Logs and how to view them in CloudWatch.

AWS API Gateway Access Logs. How to get them and what to do with them.

This blog post will show you how to use husky and git-secrets to prevent committing passwords and other sensitive information to a git repository. This is a good idea because it reduces the risk of your API key and secret being exposed to your code.

Using husky and git-secrets to prevent committing sensitive information to a git repository.

As of July 19th, 2022 Amazon Web Services released their Design System as open-source along with a library of React components that implement the design system. This blog post is a quick overview of the design system and how it can be used with NextJS.

CloudScape Design with NextJS

AWS SDK v3 now stable and recommended for general use. AWS SDK for JavaScript(V2) is deprecated. This article is serries of tips and tricks to use aws-sdk v3. The first article is about how to save text file from S3 using aws-sdk v3.

Save text file from S3 using aws-sdk v3

This is a simple example of how to use Route53 and S3 to forward your domain to absolute URLs.

Use Route53 + S3 to forward your domain to absolute URLs.

Sometimes you want mail clients to group emails into threads. For example, if you have a group of emails that are related to the same topic, you want to mail clients to group them together when the user views the list of emails in threaded view, the email client will show the thread.


AWS SES sends mails with a custom Reference header

A signed URL includes additional information, for example, an expiration date and time, that gives you more control over access to your content. This additional information appears in a policy statement, which is based on either a canned policy or a custom policy.

Cloudfront restrict user access by signed URLs

Sometimes you want to show a progress bar while downloading a file in Node.js. This article will show you how to do that.

Show a progress bar when downloading files in Node.js

AWS Backup is a service that provides backup and restore of your AWS resources. This is an example of how to use the AWS Backup API to assign resources to a backup plan.

AWS Backup resources assignment by Tag using AWS CDK

Custom Authorizers allow you to run an AWS Lambda Function via API Gateway before your targeted AWS Lambda Function is run. This is useful for Microservice Architectures or when you simply want to do some Authorization before running your business logic.

API Gateway Authorizer Function for Auth0 or AWS Cognito using the JWKS method.

You can authenticate and protect your Amazon OpenSearch Service default installation of OpenSearch Dashboards using Amazon Cognito. This article will show you how to do this using the AWS CDK.

Configuring Amazon Cognito authentication for OpenSearch Dashboards in AWS CDK

AWS CloudFormation templates can contain parameters—custom values that are supplied at deployment time and incorporated into the template. Since the AWS CDK synthesizes AWS CloudFormation templates, it too offers support for deployment-time parameters. Using the AWS CDK, you can both define parameters, which can then be used in the properties of constructs you create, and you can also deploy stacks containing parameters.

How to use parameters in AWS CDK?

Storing and managing secrets like API keys and other credentials can be challenging. Your API key is valuable information and an accidental leak could result in unwanted calls, app blockage, or worse. Publicly exposing your API keys can lead to unexpected charges on your account

Improve the Security of API Keys [Checklist included]

AWS Lambda now supports event filtering for Amazon DynamoDB. But AWS CDK is not yet able to support this. In this article, I will show how to do this in CDK.

Filtering DynamoDB event for AWS Lambda functions

The automatic references created by CDK when you use resources across stacks are convenient but may block your deployments if you want to remove the resources that are referenced in this way. This blog will explain how to remove cross-stack references

AWS CDK Removing automatic cross-stack references

Today, I would like to introduce you to a tool, called Metube Video Downloader. It is a simple program that can download videos from 10.000+ platforms. It has more exciting features than any other video downloader.

Metube.one - Video downloader, download video from 10.000+ platforms.

Assume that you have a Cognito user pool and you want to create an API that allows user to access to API without any authentication. This article will show you how to do that.

Allow user access to your API without authentication (Anonymous user access)

A Lambda proxy integration enables you to integrate an API route with a Lambda function. When a client calls your API, API Gateway sends the request to the Lambda function and returns the function's response to the client. Today, I will show you how to create a Lambda proxy integration for an HTTP API in AWS CDK.

AWS Lambda proxy integrations for HTTP APIs in AWS CDK

All spinners are displayed as 24 x 24 dp. The main content rests inside the live area of 22 dp with a padding of 1dp.

A collection of 24 x 24 dp SVG spinners!

You can deploy your Lambda function code as a container image. This blog post is about how to do that in AWS CDK.

Deploy Python Lambda functions with container images in AWS CDK

Because Node.js doesn't run TypeScript code natively, you must first transpile your TypeScript code into JavaScript. Then, use the JavaScript files to deploy your function code to Lambda. But now you can write a lambda typescript with the NodejsFunction construct without transpile your code first.

Building Lambda functions with TypeScript in AWS CDK

You can use CloudFront to automatically compress certain types of objects (files) and serve the compressed objects when viewers (web browsers or other clients) support them. Today I will show how to do it in AWS CDK.

Configuring CloudFront to compress objects in AWS CDK

Mock Service Worker is an API mocking library for browsers and Node. It provides seamless mocking by interception of actual requests on the network level using Service Worker API. This makes your application unaware of any mocking being at the place.

API mocking example (Mock Service Worker) with Next.js

In this article, I will show you how to implement Amazon API Gateway as a proxy for DynamoDB by using AWS cdk. It is simple and very interesting.

Using Amazon API Gateway as a proxy for DynamoDB in AWS CDK

This example creates Http proxy using API gateway of cdk.

Create HTTP Proxy APIGateway in AWS CDK

In this blog, we will discuss issues with dealing with dates times and distributed systems in general (distributed clients as well as distributed decision services)

Issues Date/Time With Serverless functions

Let's assume that we want to execute python file in a node js environment. So the container image should have both python and node js runtime and the container should compatible with lambda

All Posts

AxiosError, Parse Error, Invalid header value char

Aurora Serverless V2 with AWS CDK

Enable CORS in AWS API Gateway + Lambda proxy integration with AWS CDK

Add Google Adsense to Next.js, refreshed ads

API Ultimate Guide, Stateful vs Stateless. The Key Differences