threkk/cart-service

Cart service

This is an implementation in Golang of a cart microservice extracted from a monolith migration. The current version is a work in progress and it is not fully completed.

Status

Things that are working.

• /cart endpoint.
• API design
• Description of the architecture
• CORS
• Logging.
• Error recovery.

Things that are sort of working.

• Basic authentication: Currently, the list of users/passwords are hard coded.
• Database: The persistence layer is currently a SQLite database in memory with automatic migrations. It is good enough for development, but not for production.

Things that are not working.

• /cart/{cartId}/item endpoint.
• Unit testing.
• Dockerfile.
• General polishing.

Getting started

Requirements

• Go 1.15
• SQLite 3.33.0

How to build & run

cd /cmd/cart
go mod download
go build
./cart

Some examples

Unauthorised access

❯ http GET http://localhost:3000/cart
HTTP/1.1 401 Unauthorized
Access-Control-Allow-Methods: POST,GET,POST,PUT,DELETE,HEAD,OPTIONS,PATCH
Access-Control-Allow-Origin: *
Content-Length: 67
Content-Type: application/json; charset=utf-8

{
    "description": "Unauthorised",
    "error": "Unauthorised",
    "description": "Unauthorised"
}

Create a cart

❯ http POST http://user:user@localhost:3000/cart
HTTP/1.1 201 Created
Access-Control-Allow-Methods: POST,GET,POST,PUT,DELETE,HEAD,OPTIONS,PATCH
Access-Control-Allow-Origin: *
Content-Length: 131
Content-Type: application/json; charset=utf-8

{
    "created_at": "2020-09-05T21:51:38.9030783+02:00",
    "id": 1,
    "items": null,
    "update_at": "2020-09-05T21:51:38.9030783+02:00",
    "user_id": 2
}

Retrieve a cart

❯ http GET http://user:user@localhost:3000/cart/1
HTTP/1.1 200 OK
Access-Control-Allow-Methods: GET,GET,POST,PUT,DELETE,HEAD,OPTIONS,PATCH
Access-Control-Allow-Origin: *
Content-Length: 131
Content-Type: application/json; charset=utf-8

{
    "created_at": "2020-09-05T21:51:38.9030783+02:00",
    "id": 1,
    "items": null,
    "update_at": "2020-09-05T21:51:38.9030783+02:00",
    "user_id": 2
}