Cloud Endpoint for OpenAPIs

 

Cloud Endpoints and OpenAPIs

In our previous blog you have seen, what is Cloud Endpoints? , How it works ?, What are applications of it ?. So without repeating that , I will give just glimpes of Cloud Endpoints.

Cloud Endpoints is an API management system that employs the same infrastructure Google uses for its own APIs to enable you encrypt, monitor, analyze, and establish quotas on your APIs.After you’ve deployed your API to Endpoints, you may utilize the Cloud Endpoints Portal to build a developer portal, which is a website where users of your API can browse documentation and interact with it.

What is Open API ?

An open API (also known as a public API) is a publicly accessible application programming interface that allows developers to access a proprietary software application or online service via programmatic access. APIs are a collection of rules that control how one programme interacts with another. Although this is not often the case with web APIs, APIs can provide developers access to certain core functionalities of a software. In its most basic form, an API enables one piece of software to communicate with another piece of software, whether within a single computer via an operating system-provided method or over a TCP/IP-based or non-TCP/IP-based network.

Currently, many APIs are provided by organizations for access with HTTP. APIs can be utilized by both internal and external developers.


                                        Fig: 1. Benefits of Open API
 

Cloud Endpoints and OpenAPI

Cloud Endpoints can work with APIs that are described using the OpenAPI 2.0 specification. Any publicly accessible REST framework, such as Django or Jersey, can be used to build your API. You must describe your API in an OpenAPI document, which is a JSON or YAML file.


                                                          Fig:3. OpenAPI 2.0 and 3.0 Specification 

Benefits

One of the main advantages of utilizing OpenAPI is that it is simple to develop reference documentation for your API once you have an OpenAPI page that specifies it.
There are a number of other advantages to adopting OpenAPI. You can, for example:
1.Client libraries can be created in a variety of languages.
2.Create stubs for the server.
3.Projects can be used to verify compliance and generate samples.

Basic structure of an OpenAPI document

An OpenAPI document describes the surface of your REST API, and defines information such as:

  • The name and description of the API.
  • The individual endpoints (paths) in the API.
  • How the callers are authenticated.

Generating an OpenAPI document

You might be able to build an OpenAPI document depending on the language you’re using. There are open source Jersey and Spring projects in Java that can build an OpenAPI document using annotations. A Maven plugin is also available. Flask-swagger may be of interest to Python users, whereas swagger-node-express may be of interest to Node developers.
The OpenAPI community is always working on new tools to aid in the creation (and, in some cases, automatic generation) of OpenAPI documents.

Cloud Endpoints is an API management system that employs the same infrastructure Google uses for its own APIs to enable you encrypt, monitor, analyse, and establish quotas on your APIs. Endpoints manages APIs using the Extensible Service Proxy (ESP) and the Extensible Service Proxy V2 (ESPv2). Version 2 of the OpenAPI Specification (formerly known as the Swagger spec) — the industry standard for defining REST APIs — is supported by Endpoints.

Supported compute platforms

Endpoints for OpenAPI depends on either ESP or ESPv2 for API management. Both ESP and ESPv2 are Open Source projects and are available to you in the following ways:

  1. A container in Google Container Registry:
  • See the ESP release notes for the current ESP Docker image.
  • See the ESPv2 release notes for the current ESPv2 Docker image.

2. Source code in GitHub:

  • See the ESP README for details on building ESP.
  • See the ESP README for details on building ESP.

You can run the ESP container on the following:

  • App Engine flexible environment
  • Compute Engine
  • Kubernetes, including Google Kubernetes Engine
  • A Linux or macOS computer or another platform

You can run the ESPv2 container on the following:

  • App Engine
  • Cloud Functions
  • Cloud Run
  • Cloud Run for Anthos
  • GKE
  • Compute Engine
  • Kubernetes

On the App Engine flexible environment, ESP is automatically deployed for you when you add a few lines to your app.yaml file. ESPv2 does not support App Engine flexible environment.For the App Engine standard generation 1 environment, you must use Endpoints Frameworks. If you instead deploy the container to one of the compute options above, you can proxy to either generation of App Engine standard runtime.

 

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