Amazon API Gateway is a fully managed service that simplifies the publishing, maintenance, monitoring, and securing of APIs at any scale. It supports RESTful APIs and WebSocket APIs, offering various features like security, caching, and integration with AWS services. The API Gateway facilitates API management through stages, mapping templates, and throttling to enhance performance and control request submissions.

1. AMAZON API GATEWAY

2. WHAT IS AMAZON API GATEWAY
 Fully managed service
 Makes it easy for developers to publish, maintain, monitor, and secure APIs at any scale
 An AWS service for creating, publishing, maintaining, monitoring, and securing REST, HTTP, and WebSocket APIs at
any scale

3. AMAZON API GATEWAY FEATURES
 Support for RESTful APIs and WebSocket APIs
 Private integrations with AWS ELB & AWS Cloud Map
 Metering
 Security
 Resiliency
 Operations Monitoring
 Lifecycle Management
 AWS Authorization

4. ENDPOINTS
 An API endpoint type is a hostname for an API in API Gateway that is deployed to a specific region.
 The hostname is of the form {api-id}.execute-api.{region}.amazonaws.com
 Types of endpoints includes
- Edge-Optimized Endpoint
- Regional Endpoint
- Private Endpoint

5. ENDPOINTS

6. API GATEWAY REST
API
 A collection of HTTP resources
and methods that are
integrated with backend HTTP
endpoints, Lambda functions,
or other AWS services.

7. API GATEWAY
WEBSOCKET API
 A collection of WebSocket
routes and route keys that
are integrated with backend
HTTP endpoints, Lambda
functions, or other AWS
services.

8. STAGES AND STAGE
VARIABLES
 A stage is a logical reference to
a lifecycle state of your REST or
WebSocket API (for example,
‘dev’, ‘prod’, ‘beta’, ‘v2’)

9. MAPPING
TEMPLATES
 Mapping templates can be
used to modify request /
respons

10. CACHING
 Caching allows you to cache the
endpoint’s response.
 Caching can reduce the number
of calls to the backend and
improve the latency of requests
to the API.

11. API THROTTLING
 API Gateway sets a limit on a
steady-state rate and a burst of
request submissions against all
APIs in your account
 By default API Gateway limits
the steady-state request rate to
10,000 requests per second.

12. INTEGRATION
TYPE
 . You choose an API integration type according to the types of integration
endpoint you work with and how you want data to pass to and from the
integration endpoint

13. AWS INTEGRATION
 This type of integration lets an
API expose AWS service actions.

14. AWS_PROXY
INTEGRATION
 This type of integration lets an
API method be integrated with
the Lambda function invocation
action with a flexible, versatile,
and streamlined integration
setup.

15. SAME ORIGIN
POLICY
 Used to prevent cross-site
scripting attacks
 Cross-origin resource sharing
(CORS)
 Can enable Cross Origin
Resource Sharing (CORS) for
multiple domain use with
JavaScript/AJAX