How to automate AWS SES E-mail Template Update

Amazon Web Service Simple Email Service ( SES ) is a popular and considerably cheap service to send out bulk transactional & personalized promotional emails. However, when it comes to the Template-based emails which help to bind values and send HTML email, the most frustrating part is updating the template and testing them.

Problems:

1. Creating a valid JSON file by escaping the HTML Email Text property

2. Updating the templated HTML file ( manual command-line task )

3. Testing the templated emails

How to automate AWS SES E-mail Template Update

Solution:

I've come up with a normal update script written in Nodejs language with the help of AWS SDK that can help in scaling email template updates faster.

Usage:

> node template-creater.js emailtemplate.html emailtemplate.json false emailtemplate-unique-name "Subject for the email"

This will automatically accept the templated HTML file and creates a valid JSON file and tries updating/creating templates in the AWS SES console based on configuration or command-line argument values.

1st Argument => Templated HTML File

2nd Argument => Name of the auto-generated template json file

3rd Argument => Update or Create template ( boolean )

4th Argument => Unique template name

5th Argument => Subject of the email

Final Words:

Feel free to use the script ( No license Restrictions for personal/commercial projects and No Warranty from Author ) and for bugs/hugs do comment below. Share is care.

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Hashing with Bcrypt in Nodejs

Publishing tutorials on nodejs after a long time 😀😀 and additionally, quarantine made me productive to learn more about Nodejs core concepts and implementing server-side code.

Background:

Learning cryptography is tricky and requires more patience to master those areas. Additionally, If you want to learn more about Bcrypt Algorithm and implementation, check out the link here.

Hashing with Bcrypt in Nodejs

Simple Steps to implement Bcrypt in Nodejs

Installation:

1. npm install bcrypt --save 

Start installing the bcrypt package into your nodejs apps which helps to implement the hashing function.

Hashing Function ( Sync and Async ):

Hashing function with Salt Generation ( Sync )

const salt = bcrypt.genSaltSync(saltRounds);
const hash = bcrypt.hashSync(myPlaintextPassword, salt);

Hashing function with Salt Generation ( Async )

bcrypt.genSalt(saltRounds, function(err, salt) {
    bcrypt.hash(plainText, salt, function(err, hash) {
        // Store hash in your password DB.
    });
});

Verify Function ( Sync and Async ):

Hash verification function ( Sync )

bcrypt.compareSync(myPlaintextPassword, hash); // true/false

Hash verification function ( Async )

bcrypt.compare(myPlaintextPassword, hash, function(err, result) {
    // result == true/false
});

Final note:

Bcrypt is safe as of now from timing attacks and other cryptographic reverse engineering or cryptanalysis. If you would like to check more about implementing using Async and Promises for Bcrypt Module, please check out the documentation of the bcrypt npm module.

Finally, for Hugs/Bugs do comment below. Share is care.

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