Ticketing API

A full scale production grade micro services backend application for selling tickets to attend a sports event

Architecture of Multi-Service Apps

$ npm install -g typescript

$ cd app
$ mkdir auth
$ npm init -y
$ npm install --save typescript  express @types/express
$ npm install --save-dev ts-node-dev

$ tsc --init
$ npm start

$ cd skaffold
$ skaffold dev

$ minikube --profile my-profile ip
172.17.0.2

$ sudo vi /etc/hosts

#---------------------------------------------------------------------
# Minikube
#---------------------------------------------------------------------
172.17.0.2 ticketing.dev

browser --> https://ticketing.dev/api/users/currentuser

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Response Normalization Strategies

01. Creating Route Handlers

02. Scaffolding Routes

03. Adding Validation

$ cd app/auth
$ npm install --save express-validator

04. Handling Validation Errors

$ curl \
--data '{"email":"notValidEmail", "password":"1"}' \
--header "Content-Type: application/json" \
--request POST http://ticketing.dev/api/users/signup \
| python -m json.tool

response:

[
    {
        "location": "body",
        "msg": "Email must be valid",
        "param": "email",
        "value": "notValidEmail"
    },
    {
        "location": "body",
        "msg": "Password must be between 4 and 20 characters",
        "param": "password",
        "value": "1"
    }
]

06. Surprising Complexity Around Errors

07. Other Sources of Errors

08. Solution for Error Handling

09. Building an Error Handling Middleware

10. Communicating More Info to the Error Handler

11. Encoding More Information In an Error

12. Subclassing for Custom Errors

13. Determining Error Type

14. Converting Errors to Responses

15. Moving Logic Into Errors

16. Verifying Our Custom Errors

17. Final Error Related Code

18. How to Define New Custom Errors

19. Uh Oh... Async Error Handling

08. Database Management and Modeling

01. Creating Databases in Kubernetes

$ cd app/auth
$ npm install --save mongoose

$ kubectl get pods
NAME                                     READY   STATUS    RESTARTS   AGE
auth-deployment-5985769fb8-j5k79         1/1     Running   0          57s
auth-mongo-deployment-55d6d9cc49-jrzsc   1/1     Running   0          57s

02. Connecting to MongoDB

$ cd app/auth
$ npm install --save @types/mongoose

03. Understanding the Signup Flow

04. Getting TypeScript and Mongoose to Cooperate

05. Creating the User Model

06. Type Checking User Properties

07. Adding Static Properties to a Model

08. Defining Extra Document Properties

09. What's That Angle Bracket For

10. User Creation

$ curl \
--data '{"email":"marley@example.com", "password":"123456789"}' \
--header "Content-Type: application/json" \
--request POST http://ticketing.dev/api/users/signup \
| python -m json.tool

response:

{
    "__v": 0,
    "_id": "5eb40ea00b8b66048cc1564e",
    "email": "marley@example.com",
    "password": "123456789"
}

11. Proper Error Handling

14. Adding Password Hashing

13. Reminder on Password Hashing

15. Comparing Hashed Password

16. Mongoose Pre-Save Hooks

$ curl \
--data '{"email":"marley1@example.com", "password":"123456789"}' \
--header "Content-Type: application/json" \
--request POST http://ticketing.dev/api/users/signup \
| python -m json.tool

response:

{
    "__v": 0,
    "_id": "5eb4248c1650af0359d5170f",
    "email": "marley1@example.com",
    "password": "8229ab93d0751b4cbd0f396fd8e701e36089fff0d0c848d5617e65cee9eb830fc7619135058815873d24a4adcbd1779cff1c8efec79a38647810e5b14f15ae33.ef63680bfb5151ed"
}

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