Install the dependencies:
yarn install
Set the environment variables:
cp .env.example .env
# open .env and modify the environment variables (if needed)
- NoSQL database: MongoDB object data modeling using Mongoose
- Authentication and authorization: using passport
- Validation: request data validation using Joi
- Logging: using winston and morgan
- Testing: unit and integration tests using Jest
- Error handling: centralized error handling mechanism
- API documentation: with swagger-jsdoc and swagger-ui-express
- Process management: advanced production process management using PM2
- Dependency management: with Yarn
- Environment variables: using dotenv and cross-env
- Security: set security HTTP headers using helmet
- Santizing: sanitize request data against xss and query injection
- CORS: Cross-Origin Resource-Sharing enabled using cors
- Compression: gzip compression with compression
- CI: continuous integration with Travis CI
- Docker support
- Code coverage: using coveralls
- Code quality: with Codacy
- Git hooks: with husky and lint-staged
- Linting: with ESLint and Prettier
- Editor config: consistent editor configuration using EditorConfig
Running locally:
yarn dev
Running in production:
yarn start
The environment variables can be found and modified in the .env
file. They come with these default values:
# Port number
PORT=6100
# URL of the Mongo DB
MONGODB_URL=mongodb://127.0.0.1:27017/task-hellwet-soft
# JWT
# JWT secret key
JWT_SECRET=thisisasamplesecret
# Number of minutes after which an access token expires
JWT_ACCESS_EXPIRATION_MINUTES=30
# Number of days after which a refresh token expires
JWT_REFRESH_EXPIRATION_DAYS=30
#api path
API_PATH=/api/v1
# SMTP configuration options for the email service
# For testing, you can use a fake SMTP service like Ethereal: https://ethereal.email/create
SMTP_HOST=email-server
SMTP_PORT=587
SMTP_USERNAME=email-server-username
SMTP_PASSWORD=email-server-password
[email protected]
#NODE_ENV NODE_ENV=development
src\
|--config\ # Environment variables and configuration related things
|--controllers\ # Route controllers (controller layer)
|--middlewares\ # Custom express middlewares
|--models\ # Mongoose models (data layer)
|--routes\ # Routes
|--services\ # Business logic (service layer)
|--utils\ # Utility classes and functions
|--validations\ # Request data validation schemas
|--app.js # Express app
|--index.js # App entry point
To view the list of available APIs and their specifications, run the server and go to http://localhost:3000/v1/docs
in your browser. This documentation page is automatically generated using the swagger definitions written as comments in the route files.
List of available routes:
Auth routes:
POST /v1/auth/register
- register
POST /v1/auth/login
- login
POST /v1/auth/logout
- logout
POST /v1/auth/refresh-tokens
- refresh auth tokens
POST /v1/auth/forgotPassword
- send reset password email
POST /v1/auth/verifyEmail
- verify email
POST /v1/auth/resetPassword
- reset password\
The app has a centralized error handling mechanism.
Controllers should try to catch the errors and forward them to the error handling middleware (by calling next(error)
). For convenience, you can also wrap the controller inside the catchAsync utility wrapper, which forwards the error.
const catchAsync = require('../utils/catchAsync');
const controller = catchAsync(async (req, res) => {
// this error will be forwarded to the error handling middleware
throw new Error('Something wrong happened');
});
The error handling middleware sends an error response, which has the following format:
{
"code": 404,
"message": " not found"
}
When running in development mode, the error response also contains the error stack.
The app has a utility ApiError class to which you can attach a response code and a message, and then throw it from anywhere (catchAsync will catch it).
For example, if you are trying to get a user from the DB who is not found, and you want to send a 404 error, the code should look something like:
const httpStatus = require('http-status');
const ApiError = require('../utils/ApiError');
const User = require('../models/User');
const getUser = async (userId) => {
const user = await User.findById(userId);
if (!user) {
throw new ApiError(httpStatus.NOT_FOUND, 'User not found');
}
};
Request data is validated using Joi. Check the documentation for more details on how to write Joi validation schemas.
The validation schemas are defined in the src/validations
directory and are used in the routes by providing them as parameters to the validate
middleware.
const express = require('express');
const validate = require('../../middlewares/validate');
const userValidation = require('../../validations/user.validation');
const userController = require('../../controllers/user.controller');
const router = express.Router();
router.post('/users', validate(userValidation.createUser), userController.createUser);
To require authentication for certain routes, you can use the auth
middleware.
const express = require('express');
const auth = require('../../middlewares/auth');
const userController = require('../../controllers/user.controller');
const router = express.Router();
router.post('/users', auth(), userController.createUser);
These routes require a valid JWT access token in the Authorization request header using the Bearer schema. If the request does not contain a valid access token, an Unauthorized (401) error is thrown.
Generating Access Tokens:
An access token can be generated by making a successful call to the register (POST /v1/auth/register
) or login (POST /v1/auth/login
) endpoints. The response of these endpoints also contains refresh tokens (explained below).
An access token is valid for 30 minutes. You can modify this expiration time by changing the JWT_ACCESS_EXPIRATION_MINUTES
environment variable in the .env file.
Refreshing Access Tokens:
After the access token expires, a new access token can be generated, by making a call to the refresh token endpoint (POST /v1/auth/refresh-tokens
) and sending along a valid refresh token in the request body. This call returns a new access token and a new refresh token.
A refresh token is valid for 30 days. You can modify this expiration time by changing the JWT_REFRESH_EXPIRATION_DAYS
environment variable in the .env file.
The auth
middleware can also be used to require certain rights/permissions to access a route.
const express = require('express');
const auth = require('../../middlewares/auth');
const userController = require('../../controllers/user.controller');
const router = express.Router();
router.post('/users', auth('manageUsers'), userController.createUser);
In the example above, an authenticated user can access this route only if that user has the manageUsers
permission.
The permissions are role-based. You can view the permissions/rights of each role in the src/config/roles.js
file.
If the user making the request does not have the required permissions to access this route, a Forbidden (403) error is thrown.
Import the logger from src/config/logger.js
. It is using the Winston logging library.
Logging should be done according to the following severity levels (ascending order from most important to least important):
const logger = require('<path to src>/config/logger');
logger.error('message'); // level 0
logger.warn('message'); // level 1
logger.info('message'); // level 2
logger.http('message'); // level 3
logger.verbose('message'); // level 4
logger.debug('message'); // level 5
In development mode, log messages of all severity levels will be printed to the console.
In production mode, only info
, warn
, and error
logs will be printed to the console.
It is up to the server (or process manager) to actually read them from the console and store them in log files.
This app uses pm2 in production mode, which is already configured to store the logs in log files.
Note: API request information (request url, response code, timestamp, etc.) are also automatically logged (using morgan).
The app also contains 2 custom mongoose plugins that you can attach to any mongoose model schema. You can find the plugins in src/models/plugins
.
const mongoose = require('mongoose');
const { toJSON, paginate } = require('./plugins');
const userSchema = mongoose.Schema(
{
/* schema definition here */
},
{ timestamps: true }
);
userSchema.plugin(toJSON);
userSchema.plugin(paginate);
const User = mongoose.model('User', userSchema);
The toJSON plugin applies the following changes in the toJSON transform call:
- removes __v, createdAt, updatedAt, and any schema path that has private: true
- replaces _id with id