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With the rapid development of the Internet, Web API has become the core of supporting open applications. The scalability and reusability of APIs make them an important tool for data exchange and collaboration between different systems. However, developers often face a common question: How to maintain API documentation and ensure API reliability?
Swagger is an open source framework that provides a complete solution for API design, documentation, testing and deployment. This article will explore how to use Swagger to maintain API documentation to better manage and maintain existing APIs.
1. Basic concepts of Swagger
Swagger creates and documents APIs through JSON or YAML specification files that describe the API. This file is called a Swagger specification.
Swagger specification files contain the following concepts:
2. Use of Swagger
Swagger UI is an open source tool that allows us to The Swagger specification file is displayed in the interface. Its main purpose is to provide a clear and interactive documentation and allow us to test and debug the API.
Use the following command to install Swagger UI:
npm install swagger-ui-dist
Write the Swagger specification file to explain the path and method of our API , parameters, responses and other information.
The following is an example:
swagger: '2.0' info: title: User API Root version: 1.0.0 paths: /users: get: tags: - users description: Returns all users produces: - application/json responses: 200: description: A list of user names schema: type: object properties: id: type: integer example: 123 name: type: string example: John Doe
In this example, we define an API path "/users" and a GET method, returning a JSON containing "id" and "name" Array of objects in response.
Integrate Swagger UI in your web application to display your Swagger specification file. Add the following HTML code to your web page:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Swagger UI</title> <link rel="stylesheet" type="text/css" href="./node_modules/swagger-ui-dist/swagger-ui.css"> </head> <body> <div id="swagger-ui"></div> <script src="./node_modules/swagger-ui-dist/swagger-ui-bundle.js"></script> <script> window.onload = function() { SwaggerUIBundle({ url: "https://api.example.com/swagger", dom_id: '#swagger-ui', deepLinking: true, presets: [ SwaggerUIBundle.presets.apis, SwaggerUIBundle.SwaggerUIStandalonePreset ], plugins: [ SwaggerUIBundle.plugins.DownloadUrl ], layout: "StandaloneLayout" }) } </script> </body> </html>
In this example, we load the Swagger UI in an HTML file and pass the URL address of the Swagger specification file to the SwaggerUIBundle to render the API documentation.
Use Swagger UI to test and debug APIs in web applications.
Through Swagger UI, we can:
Summary
Swagger is an excellent framework that can provide developers with a complete solution for API design, documentation, testing and deployment. Using Swagger, we can better manage and maintain existing APIs. This is also one of the best ways under the centralized development model.
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