Use Swagger to automatically generate API documents in Beego

Using Swagger in Beego to automatically generate API documents

As Internet technology becomes increasingly mature, more and more companies are beginning to digitally transform their business models, and APIs are an important part of digital transformation. components are becoming more and more important. When developing APIs, in addition to ensuring the security and reliability of the API, how to allow other front-end and back-end development engineers to quickly understand and use the API they developed is also a very important part. This article will introduce how to use the Swagger tool to automatically generate API documents when using the Beego framework to develop APIs to facilitate the call and use of other development engineers.

What is Swagger?

Swagger is an open source API specification and toolset that aims to simplify and standardize the development and use of APIs. It can automatically generate interactive interfaces between developers, consumers and documents, and provides many visual help document functions.

Why use Swagger?

Some APIs require documentation and descriptions to help understand their usage and how to call them. Using Swagger can simplify and automatically generate these documents. Using the Swagger tool can make API documents more beautiful, standardized, and easy to read when generated. Swagger's mandatory format can also assist developers in designing and implementing APIs that comply with standardized specifications, thus saving time and energy.

Using Swagger in Beego

1. Add dependencies

To use Swagger in a Beego project, you need to add the dependencies of the Swagger library to the project first. You can install it through the following command:

go get -u github.com/swaggo/swag/cmd/swag
go get -u github.com/swaggo/gin-swagger
go get -u github.com/swaggo/gin-swagger/swaggerFiles

2. Edit Swagger comments

In the Beego framework, we use comments in the Router code to explain API parameters and requests. Type, return value and other information. When using Swagger, you need to add Swagger specification tags to these comments to automatically generate API documents.

The following is a simple example:

// @Summary  获取一个用户信息
// @Description 通过ID获取一个用户信息
// @Accept  json
// @Produce  json
// @Param   id     path    int     true        "用户ID"
// @Success 200 {object} models.User
// @Router /users/{id} [get]
func GetUser(c *gin.Context) {
    // ...
}

In the comments, we have added some special specification tags:

• @Summary: Overview of API methods
• @Description: Detailed description of the API method
• @Accept: Accepted Content-Type type
• @Produce: Response Content-Type type
• @ Param: Request parameters, including parameter name, location, data type, whether it is required and description.
• @Success: HTTP status code and return value type of successful response, which can also include arrays, structures and other information.
• @Router: Request path and request method.

You can add more tags to supplement the API description as needed.

3. Automatically generate documentation

After we add Swagger specification comments to the code, run the following command in the root directory of the project to generate API documentation:

swag init

This command will generate a docs folder in the project directory, which will contain the generated API documentation and static resource files.

4. Use SwaggerUI to view API documentation

If we send the generated documentation directly to front-end developers, it will bring unnecessary pressure to them. In order to make the API documentation more friendly and easier to use, we can introduce SwaggerUI to view the API documentation.

First we need to copy the SwaggerUI static resource files to our project. Then, we can create a Router with the path /swagger/*any to associate SwaggerUI with our project:

r.StaticFS("/swagger", http.Dir("docs"))

Next, visit http://localhost:8080/swagger/index.html in the browser to see the automatically generated API document.

Summary

Using Swagger in Beego, you can standardize the definition of API through annotations and generate beautiful API documents for easy use by developers. At the same time, the introduction of SwaggerUI can further simplify API display and interaction and accelerate development.

Reference materials:

https://www.cnblogs.com/wuyun-blog/p/10540875.html

https://github.com/swaggo/ gin-swagger

https://github.com/swaggo/swag

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