Request/Response Part 2: HTTP & The CRUD Controller

1. HTTP, Request Methods and Response Codes

Request Methods

Method	Action
GET	Retrieve resource, no modification on server
POST	Create resource
PUT	Update resource
DELETE	Delete resource

MDN Web Docs – HTTP request methods

Response Status Codes

Code	Action
200 OK	Request successful
201 CREATED	Request successful and resource has been created
404 NOT FOUND	Resource not found
405 METHOD NOT ALLOWED	Request method is not allowed for the resource

MDN Web Docs – HTTP response status codes

2. Specifying Allowed Request Method for Controller Mapping

GitHub Repo Tag

Curl Command

curl -X POST localhost:8080/people/create/Alice/65

3. Adding a Request Body

GitHub Repo Tag

Curl Command with Request Body

curl -iX POST --header "Content-Type: application/json" --data '{"name": "Alice", "age": 53}' localhost:8080/people/create/

4. Adding GET(individual resource), PUT and DELETE Mappings to Controller

As we add functionality to create, read, update and delete a resource to a controller, it becomes a so called CRUD Controller.

GitHub Repo Tag

---

Previous article |
Next article