REST APIs

• Architecture used for web services that transfer data
• Examples
  • https://developer.github.com/v3/
  • https://dev.twitter.com/rest/public

JSON

JavaScript Object Notation

{
    "students": [
        {
            "name": "Daniel Hsing",
            "age": 16, // :^)
            "school": {
                "id": 1,
                "name": "Chinese International School",
                "country": "Hong Kong"
            }
        }
    ]
}

var students = [
    {
        name: "Daniel Hsing",
        age: 16, 
        school: {
            id: 1,
            name: "Chinese International School",
            country: "Hong Kong"
        }
    }
]

JavaScript vs JSON

Transport Layer Protocol:

HTTP(S)

• TCP Port 80 for HTTP
• TCP Port 443 for HTTPS

HTTP Verb

GET

POST

PUT

DELETE

Function

Retrieve a resource

Create a resource

Update a resource

Remove a resource

URL Scheme

<protocol>://<host>/<path>

Resources are denoted by different paths

User Registration Example

HTTP Client: Postman

Endpoints

• /api/users
  • GET
  • POST
• /login
  • POST

Working with public web APIs

• Registering an API key

• Rate Limiting

Google Maps Web API

register a key at the Google API Console