flamego-swagger

flamego middleware to automatically generate RESTful API documentation with Swagger 2.0.

Build Status Codecov branch Go Report Card GoDoc Release

Usage

Start using it

  1. Add comments to your API source code, See Declarative Comments Format.
  2. Download Swag for Go by using:
go get -u github.com/swaggo/swag/cmd/swag

Starting in Go 1.17, installing executables with go get is deprecated. go install may be used instead:

go install github.com/swaggo/swag/cmd/swag
  1. Run the Swag at your Go project root path(for instance ~/root/go-peoject-name), Swag will parse comments and generate required files(docs folder and docs/doc.go) at ~/root/go-peoject-name/docs.
swag init
  1. Download flamego-swagger by using:

go get -u github.com/asjdf/flamego-swagger
go get -u github.com/swaggo/files

Import following in your code:

import "github.com/asjdf/flamego-swagger" // flamego-swagger middleware
import "github.com/swaggo/files" // swagger embed files

Canonical example:

Now assume you have implemented a simple api as following:

// A get function which returns a hello world string by json
func Helloworld(r flamego.Render)  {
	r.JSON(http.StatusOK,"helloworld")
}

So how to use flamego-swagger on api above? Just follow the following guide.

  1. Add Comments for apis and main function with flamego-swagger rules like following:

// @BasePath /api/v1

// PingExample godoc
// @Summary ping example
// @Schemes
// @Description do ping
// @Tags example
// @Accept json
// @Produce json
// @Success 200 {string} Helloworld
// @Router /example/helloworld [get]
func Helloworld(r flamego.Render)  {
    r.JSON(http.StatusOK,"helloworld")
}
  1. Use swag init command to generate a docs, docs generated will be stored at docs/.
  2. import the docs like this: I assume your project named github.com/go-project-name/docs.

import (
   docs "github.com/go-project-name/docs"
)
  1. build your application and after that, go to http://localhost:8080/swagger/index.html ,you to see your Swagger UI.

  2. The full code and folder relatives here:

package main

import (
   "github.com/flamego/flamego"
   docs "github.com/go-project-name/docs"
   swaggerfiles "github.com/swaggo/files"
   flamegoSwagger "github.com/asjdf/flamego-swagger"
   "net/http"
)
// @BasePath /api/v1

// PingExample godoc
// @Summary ping example
// @Schemes
// @Description do ping
// @Tags example
// @Accept json
// @Produce json
// @Success 200 {string} Helloworld
// @Router /example/helloworld [get]
func Helloworld(r flamego.Render)  {
   r.JSON(http.StatusOK,"helloworld")
}

func main()  {
   r := flamego.New()
   docs.SwaggerInfo.BasePath = "/api/v1"
   r.Group("/api/v1", func() {
      r.Group("/example", func() {
         r.Get("/helloworld",Helloworld)
      })
   })
   r.Get("/swagger/{**}", flamegoSwagger.WrapHandler(swaggerfiles.Handler))
   r.Run(":8080")

}

Demo project tree, swag init is run at relative .

.
├── docs
│   ├── docs.go
│   ├── swagger.json
│   └── swagger.yaml
├── go.mod
├── go.sum
└── main.go

Multiple APIs

This feature was introduced in swag v1.7.9

Configuration

You can configure Swagger using different configuration options

func main() {
	r := flamego.New()

	flamegoSwagger.WrapHandler(swaggerFiles.Handler,
		flamegoSwagger.URL("http://localhost:8080/swagger/doc.json"),
		flamegoSwagger.DefaultModelsExpandDepth(-1))

	r.Run()
}
Option Type Default Description
URL string “doc.json” URL pointing to API definition
DocExpansion string “list” Controls the default expansion setting for the operations and tags. It can be ‘list’ (expands only the tags), ‘full’ (expands the tags and operations) or ‘none’ (expands nothing).
DeepLinking bool true If set to true, enables deep linking for tags and operations. See the Deep Linking documentation for more information.
DefaultModelsExpandDepth int 1 Default expansion depth for models (set to -1 completely hide the models).
InstanceName string “swagger” The instance name of the swagger document. If multiple different swagger instances should be deployed on one flamego router, ensure that each instance has a unique name (use the –instanceName parameter to generate swagger documents with swag init).
PersistAuthorization bool false If set to true, it persists authorization data and it would not be lost on browser close/refresh.
Oauth2DefaultClientID string “” If set, it’s used to prepopulate the client_id field of the OAuth2 Authorization dialog.

GitHub

View Github