Microservices

A simple stateless microservice in Nodejs, with two major functionalities - Authentication and Image Thumbnail Generation

Setup

The API requires Node.js

To get up and running:

1. Clone the repo.

git clone https://github.com/sugam45/Microservices.git

2. cd into repo. Use the same directory name(below) if you do not change it.

cd Microservices

3. Setup the application by installing its dependencies with

npm install

4. The app gets up and running on port 3000 with npm start.

5. Important Edit the env variables in nodemon.json file and set jwtSecret to any secret phrase you want.

4. Make sure to also add your Mongo Atlas Admin Username to a nodemon.json file and change the moongoose.connect address in app.js:11 to your needs.

{
    "env": {
        "MONGO_ATLAS_PW": "ATLAS_PW",
        "JWT_KEY": "KEY"
    }
}

Testing the API routes.

Since this is mostly an API with post requests, testing will be done with Postman

Authentication

This is a mock authentication so you can pass in any username or password to login.

1. Set the request to POST and the url to /api/user/signup.
2. In the Body for the Postman request, select raw with JSON format.
3. You will be setting 2 keys (for email and password). Set the email key to any name. Set password to any password.
4. Hit Send. You will get a result in this format:

{
   "message": "Signup sucessful"
}

5. The email id and password(after getting hashed by bcrypt) will be stored in an online MongoDB database.
6. For login Set the request to POST and the url to /api/user/login.
7. In the Body for the Postman request, select raw with JSON format.
8. You will be setting 2 keys (for email and password). Set the email and password to the previously assigned values.
9. Hit Send. You will get a result in this format:

{
   "message": "Auth successful",
   "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6InRlc3RAdGVzdDEuY29tIiwidXNlcklkIjoiNWVjZDEwNWM5MDBhYmQ4Y2I0MTAzMDFmIiwiaWF0IjoxNTkwNDk3Mzc4LCJleHAiOjE1OTA1MDA5Nzh9.OdQcXpdZcWKIZ6xrERpGwULExS2oi2RwxqO7itW6scw"
}

Image Thumbnail Generation

This request resizes to an image to 50x50 pixels, and returns the resulting thumbnail as well as the originol image.

1. Set the request to POST and the url to /api/products.
2. Since this is a secure route, for testing, you will have to set the token in the Header. Set key as Authorization and value as token you received from Authentication.
3. In the Body, select form-data format and set the key as productImage with File and browse to the image you want to genrate a thumbnail of.
4. The Image will be then converted to a thumbnail of size 50x50 pixels with a sample result as below:

{
   "message": "Uploaded Image successfully",
   "createdProduct": {
       "productImage": "uploads/pexels.jpeg"
   }
}

Built With

• Node.js
• Express