How do I use AWS API Gateway as a proxy?

What is a reverse proxy API?

A reverse proxy API is a method of interacting with the backend application servers (for example, the Java server). The reverse proxy API allows applications to interact with the application server using simple HTTP requests. Reverse proxy API methods typically take an URL and can be used for any type of resource available on the application server.

Reverse proxy API methods are often used for two purposes: Reverse proxy API endpoint. When a client requests a resource from an application server, the reverse proxy API endpoint is invoked to make that request. The response from the reverse proxy API method is then passed back to the client. For example, a Java application server might call a RESTful endpoint in a reverse proxy API to retrieve data.

Reverse proxy API for testing. For example, you can use a reverse proxy API to test a client application that communicates with your application server. In this scenario, the client application will call the reverse proxy API endpoint and pass it an URL to fetch.

To demonstrate how a reverse proxy API might be implemented, we will look at a reverse proxy API that supports the following methods: POST /users.xml GET /users//. PUT /users/.xml DELETE /users/. The users.xml resource represents a collection of user entities, such as users, groups, and roles. A user entity contains a userId field that contains the user's unique identifier.

For example, if you were building an application that allowed users to post comments to a blog, you could build a reverse proxy API that could be used by the client application to submit comments to the blog. The RESTful endpoint that would handle this action would have the following URI: PUT /comments/user/. This reverse proxy API would allow clients to submit comments to a user's comments. The client application would invoke the reverse proxy API and pass it the userId of the user that is being commented upon. The reverse proxy API would then use the userId to retrieve the comments for the user.xml resource could be modeled as follows:

What is the difference between API Gateway and API proxy?

Here is the difference between API gateway and API proxy.

API Gateway: An API gateway exposes an HTTP-based RESTful interface to one or more back-end services, usually a database or batch-oriented web service, that provides a well-defined set of API operations. The services running inside the gateway are collectively known as back-end services. API gateways provide a common platform on which to run various backend services and APIs.

API Proxy: In the context of microservices, API proxy is one part of a microservice architecture that helps to define, document, and test the public interface to the services. It is similar to an API gateway, except that it is focused on the public interface, while an API gateway is focused on exposing back-end services.

API gateway exposes your API with HTTP protocol. API proxy expose your API with HTTP protocol and also support HTTP/2 protocol. You can host multiple API proxy in the same project. API gateway is a service which sits between API proxy and back-end. Api gateway and API proxy are used together. An API proxy is an application (generally run by you or a dev team) that acts as a proxy between the API consumer (usually a front end application) and the API provider (the backend). This way, when you have an API consumer that's built on a different platform, eg React Native, it can act as a proxy for API calls to an API that you are providing.