A RestFul web service allows exposing existing code functionality over a network and makes applications independent of platform and technology. RESTful services use HTTP requests and are lightweight, scalable and maintainable. In Drupal 8, web services are built into the core and include modules to export data via REST API and create custom REST methods. API keys can be generated and set through an admin form to access nodes, with routing and permissions configured for the API form.

1. RestFul Web Services in Drupal 8
Accessing Node with API Key
Sarada Prasad Prusty
https://www.drupal.org/u/saradaprasad17
@Twitter -
https://twitter.com/prasadprusty

2. A web service is a unit of managed code
that can be remotely invoked using
HTTP.
web services to exchange data over
computer networks like the Internet
.
What is Web Services?

3. Why Web Services ?
Web services allows you to expose the
functionality of your existing code over the
network .
It makes application platform and technology
independent.

4. RestFul WebServices
REpresentational State Transfer is an architectural style
i.e. a set of guidelines for building a web service .
RESTful web services are light weight, highly scalable and
maintainable and are very commonly used to createAPIs
for web-based applications .

5. How it Works ?

6. Rest Defines some methods
GET: to receive the resource representation
POST: to add some information
PUT: modify the resources
DELETE: delete the resources

7. Web Services in Drupal 8
In Drupal 8, Web Services are built into Core .

8. Modules in Drupal Core

9. View to Export Data With Rest
API

14. Custom Rest Method
Create API key in backend
Access Node with API key

15. How to Set API key ?
Create admin form for Setting API key

18. Routing and Permission
Creating routing to access the content and set
permission for API form

23. THANK YOU