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Still fretting about developing APIs? An API development guide is presented


Jun 01, 2021 Article blog


Table of contents


Every developer should be familiar with the term API which is the convention for connecting software systems or between different components. API Especially with the growing popularity of mobile applications and microservices architectures, API are the key to their success, and how API are designed and developed is especially important, and today's article is a complete API development guide that describes content, tools, and best practices in the development of API

First, api introduction

API whose full name is Application Programming Interface is an application programming interface that is a set of instructions, standards, or requirements that enable software or applications to take advantage of the capabilities/services of another application, platform, or device for better service. I n short, it allows applications to communicate with each other. For example, when we use Alipay and WeChat APP, we request data on the background server through the API and display it on the APP.

API is the basis for all applications that process data or initiate communication between two products or services. I t enables mobile applications or platforms to share their data with other applications or platforms and simplifies the user experience without involving developers. M ost importantly, API eliminates the need to build a similar program or platform from scratch. Y ou can use some other applications/existing applications in the platform. For these reasons, both application developers and business leaders focus on API development.

Before we dive into it, let's look at the basic terms that make it easier for you to understand the concept.

Second, API terminology

  1. API Key: When an API request identifies the caller through Header or parameters, the authorization code passed to the request is API Key

  1. Endpoint: When one API interacts with another system, both ends of the communication channel are considered Endpoint

  1. JSON: is the data format used for API request parameters and response principals.

  1. GET: THE HTTP METHOD OF THE RESTful API FOR OBTAINING RESOURCES.

  1. POST: The HTTP method of the RESTful API to create resources.

  1. OAuth: It's basically an open-standard authorization framework that can be accessed from the client without sharing credentials directly.

  1. REST: REST (Representative State Transfer) is an implementation of a programming architecture that provides communication efficiency between two devices/systems. It is lightweight, he shares data by reference rather than copy of the data, and the system created based on this architecture is called the RESTful system, and the most famous example of RESTful system is the World Wide Web.

  1. SOAP: SOAP or simple object access protocol is a message protocol that shares structured information when performing Web services on a computer network. It is used in conjunction with XML information sets and application layer protocols such as HTTP and SMTP for message formatting and message negotiation and transport, respectively.

  1. Delay: Latency is defined as the total time spent by the API from the request to the response process.

  1. Rate limiting: API rate limiting is the process of defining the rate at which end users can access the API This means limiting the number of requests a user can send to the API at a time.

  1. API current limit: The process of adjusting a user's use of API over a specific period of time is called a current limit. This can be used for API restrictions, such as setting a daily limit of 1,000 API requests, and when a user clicks on 1001 requests, the server returns an HTTP status code of 429 with a message that says "Too many requests."

Third, the API workflow

If you open some travel apps/websites to book your flight, fill out the form - enter the departure and return dates, city, flight and other relevant details - and submit them. In just a few seconds, a list of flights and prices, time, seat availability and other details are displayed on the screen.

To provide such rigorous data, the platform sends requests to airlines' websites to access their databases and obtain relevant data through API In response to the API api-to-platform data, the platform displays it on the screen, as follows:

 Still fretting about developing APIs? An API development guide is presented1

Here, flight booking applications/platforms and airline websites act as endpoints EndPoint while API act as intermediaries to simplify the data sharing process. W hen talking about endpoint communication, API takes two forms, REST and SOAP Although both approaches can lead to effective results, mobile app developers today prefer REST to SOAP because SOAP API are heavy and platform-dependent.

Here's how to develop an API? Which tools and technologies are selected?

Fourth, the development of API tools

There are many tools and techniques available during API development, and here are a few popular tools for developing APIs for developers:

  1. Apigee: It's Google API management tool that helps developers and entrepreneurs succeed in digital transformation by re-establishing API approach.

  1. APIMatic and API Transformer: Provides sophisticated auto-generation tools to build high-quality SDK and snippets in API formats and convert them into other specifications, such as RAML API Blueprint and more.

  1. API Science: This tool is primarily used to evaluate the performance API internal and external APIs.

  1. API Serverless Architecture: This product helps mobile application developers design, build, publish, and host APIs with the help of a cloud server infrastructure.

  1. API Platform: This is an open source PHP framework for Web API development.

  1. OAuth2: This is an identity management solution for authentication and authorization API

  1. ClearBlade: This is an API management program that incorporates IOT technology into the process.

  1. GitHub: This is an open source Git repository that hosts code services that can submit code, publish requests, and version control. You can also save your code in a private repository.

  1. Postman: This is an API tool chain that enables developers to run, test, document, and evaluate the performance of their API

V. Features of efficient APIs

 Still fretting about developing APIs? An API development guide is presented2

  1. Modify timestamps/search by criteria: API should allow users to search for data based on different criteria, such as dates, and be able to modify (update, edit, and delete) the retrieved data, and record the timestamp of the modification.

  1. Pagination: When the amount of data is large, we don't want to get a complete list of data every time. In this case, the API should be able to determine how much data is displayed at a time and the total number of pages, and should also inform the end user of the number of data pages remaining.

  1. Sorting: API should authorize users to sort data based on the timing of the modification or other criteria.

  1. JSON Support/REST: Try to use RESTful style for effective API development. REST API are stateless and lightweight. In addition, JSON syntax is similar to that of most programming languages, which makes it easy for mobile application developers to parse it into any other language.

  1. Licensing via OAuth: Because API need to be exposed, they also need to be licensed through OAuth - you can do it with the click of a button.

Six, build API best practices

  1. Traffic restrictions: Traffic limits are a good habit for considering traffic overflows and protecting them from Dos攻击

  1. Think of API gateways as enhanced points: When you set up restriction rules, API keys, and OAuth apps, you must consider API gateway as the best point to implement them. Only the right, legitimate users can access the data that follows, and the API can be analyzed and managed by encrypting messages or editing private messages at the gateway.

  1. Allow overrides of HTTP methods: Because some agents only support GET and POST methods, you need to have RESTful API overwrite HTTP method, and you can use the automatic HTTP header X-HTTP-Method-Override

  1. Assess APIs and infrastructure: Currently, real-time analytics is possible, but what if the API server has memory leaks, CPU exhaustion, or other problems? With this in mind, there are tools you can use to evaluate and troubleshoot the API

  1. Documentation: Writing documentation for API can be formatted using OpenAPI specifications so that other application developers can easily understand the entire process and leverage this information to provide a better user experience. In summary, good API documentation reduces project time and provides efficiency in API development.

The above is a guide document on API development, I hope to help you. To learn more, take a look at the documentation

io.js API Chinese documentation: https://www.w3cschool.cn/fkcaso/

Fetch API Official Documentation: https://www.w3cschool.cn/fetch_api/

Source: appinventiv.com/blog/complete-guide-to-api-development/