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UGin - Ultimate Gin API

UGin is an API boilerplate written in Go (Golang) with Gin Framework. https://github.com/gin-gonic/gin

Database Support

UGin uses gorm as an ORM. So Sqlite3, MySQL and PostgreSQL is supported. You just need to edit config.yml file according to your setup.

config.yml content:

database:
  driver: "postgres"
  dbname: "database_name"
  username: "user"
  password: "password"
  host: "localhost"
  port: "5432"

Default Models

UGin has two models (Post and Tag) as boilerplate to show relational database usage.

/model/post-model.go content:

type Post struct {
	gorm.Model
	Name        string `json:"Name" gorm:"type:varchar(255)"`
	Description string `json:"Description"  gorm:"type:text"`
	Tags        []Tag  // One-To-Many relationship (has many - use Tag's UserID as foreign key)
}

type Tag struct {
	gorm.Model
	PostID      uint   `gorm:"index"` // Foreign key (belongs to)
	Name        string `json:"Name" gorm:"type:varchar(255)"`
	Description string `json:"Description" gorm:"type:text"`
}

Filtering, Search and Pagination

UGin has it's own filtering, search and pagination system. You just need to use these parameters.

Query parameters:

/posts/?Limit=2
/posts/?Offset=0
/posts/?Sort=ID
/posts/?Order=DESC
/posts/?Search=hello

Full: http://localhost:8081/posts/?Limit=25&Offset=0&Sort=ID&Order=DESC&Search=hello

Dependencies

UGin uses Gin for main framework, Gorm for database and Viper for configuration.

go get -u github.com/gin-gonic/gin
go get -u github.com/jinzhu/gorm
go get -u github.com/jinzhu/gorm/dialects/postgres
go get -u github.com/jinzhu/gorm/dialects/sqlite
go get -u github.com/jinzhu/gorm/dialects/mysql
go get -u github.com/spf13/viper

Middlewares

1. Logger and Recovery Middlewares

Gin has 2 important built-in middlewares: Logger and Recovery. UGin calls these two in default.

router := gin.Default()

This is same with the following lines.

router := gin.New()
router.Use(gin.Logger())
router.Use(gin.Recovery())

2. CORS Middleware

CORS is important for API's and UGin has it's own CORS middleware in include/middleware.go. CORS middleware is called with the code below.

router.Use(include.CORS())

There is also a good repo for this: https://github.com/gin-contrib/cors

3. BasicAuth Middleware

Almost every API needs a protected area. Gin has BasicAuth middleware for protecting routes. Basic Auth is an authorization type that requires a verified username and password to access a data resource. In UGin, you can find an example for a basic auth. To access these protected routes, you need to add Basic Authorization credentials in your requests. If you try to reach these endpoints from browser, you should see a window prompting you for username and password.

authorized := router.Group("/admin", gin.BasicAuth(gin.Accounts{
    "username": "password",
}))

// /admin/dashboard endpoint is now protected
authorized.GET("/dashboard", controller.Dashboard)

If you want to use JWT for authorization in UGin, you can check this: https://github.com/appleboy/gin-jwt

Default Endpoints

Method URI Function
GET /posts/ controller.GetPosts
POST /posts/ controller.CreatePost
GET /posts/:id controller.GetPost
PUT /posts/:id controller.UpdatePost
DELETE /posts/:id controller.DeletePost
GET /admin/dashboard controller.Dashboard

What is next?

  • Ugin needs a user service and an authentication method with JWT.

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