Go Boilerplate Project

This Go boilerplate project demonstrates a simple user authentication system built using the Echo framework, MongoDB, and Redis.

Project Structure

The project is organized into the following main files and packages:

Main Files

• main.go: Initializes the server and sets up routes and middleware.

Packages

Handlers (handlers)

Contains HTTP handlers responsible for managing HTTP endpoints and requests.

• handlers.go: Includes handlers for:
  • GET /ping: Responds with "pong".
  • POST /login: Validates user credentials and generates a JWT token.
  • GET /user/:name: Retrieves user details based on the provided username.
  • POST /admin/user: Creates a new user (requires authentication).

Middlewares (middlewares)

Contains middleware functions for authentication and authorization.

• middlewares.go
  • Auth: Middleware function for validating JWT tokens.

Models (models)

Contains data models and operations related to the user database.

• models.go
  • Defines the User struct representing a user with username, email, and password fields.
  • Manages the MongoDB database connection and collections.
  • Defines the JWT_SECRET_KEY used for JWT token generation.

Running the Project

To run the project:

1. Ensure you have Go installed.
2. Clone this repository.
3. Navigate to the project directory.
4. Run go run main.go to start the server on port 4000.

To run the project using Air for live reloading:

1. Install Air by running go get -u github.com/cosmtrek/air.
2. Create a configuration file named air.toml in the project root directory with the following content:

# air.toml

root = "."
tmp_dir = "tmp"
build_cmd = "go build -o ./tmp/main ."
run_cmd = "./tmp/main"

3. Run air in the project root directory to start the server with live reloading support.

Usage

• GET /ping: Tests if the server is running.
• POST /login: Authenticates users by providing a JSON payload with username and password.
• GET /user/:name: Retrieves user details by providing the username.
• POST /admin/user: Creates a new user with a unique username. This endpoint is protected and requires a valid JWT token in the Authorization header (Bearer token).

Some Examples

Here you can easily call ping API using this cURL command: curl -X http://localhost:4000/ping which will give you pong string as a response.

Another example is to login as admin, which I hardcoded a default username/password (which usually you shouldn't!!):

curl -X POST http://localhost:4000/admin/login \
-H "Content-Type: application/json" \
-d '{
    "username": "admin",
    "password": "1234"
}'

which it should give you a successful response with jwt token included.

Notes

This boilerplate project is implemented just to showcase basic APIs, database usage via MongoDB and also user authentication functionality using JWT tokens. Please ensure to enhance security and error handling as needed based on your application's requirements.