httpSwagger

package module
v2.0.2 Latest Latest
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 Go to latest Published: Aug 30, 2023 License: MIT Imports: 7 Imported by: 73

README

http-swagger

Default net/http wrapper to automatically generate RESTful API documentation with Swagger 2.0.

Build Status Codecov branch Go Report Card GoDoc Release

Usage

V2 require go 1.16 or higher due to the use of embed package.

Start using it
  1. Add comments to your API source code, See Declarative Comments Format.
  2. Download Swag for Go by using:
go install github.com/swaggo/swag/cmd/swag@latest

To build from source you need Go (1.17 or newer).

Or download a pre-compiled binary from the release page.

  1. Run the Swag in your Go project root folder which contains main.go file, Swag will parse comments and generate required files(docs folder and docs/doc.go).
swag init
  1. Download http-swagger by using:
go get -u github.com/swaggo/http-swagger

And import following in your code:

import "github.com/swaggo/http-swagger" // http-swagger middleware
Canonical example:
package main

import (
	"net/http"

	"github.com/go-chi/chi"
	"github.com/swaggo/http-swagger/v2"
	_ "github.com/swaggo/http-swagger/example/go-chi/docs" // docs is generated by Swag CLI, you have to import it.
)

// @title Swagger Example API
// @version 1.0
// @description This is a sample server Petstore server.
// @termsOfService http://swagger.io/terms/

// @contact.name API Support
// @contact.url http://www.swagger.io/support
// @contact.email support@swagger.io

// @license.name Apache 2.0
// @license.url http://www.apache.org/licenses/LICENSE-2.0.html

// @host petstore.swagger.io
// @BasePath /v2
func main() {
	r := chi.NewRouter()

	r.Get("/swagger/*", httpSwagger.Handler(
		httpSwagger.URL("http://localhost:1323/swagger/doc.json"), //The url pointing to API definition
	))

	http.ListenAndServe(":1323", r)
}
  1. Run it, and browser to http://localhost:1323/swagger/index.html, you can see Swagger 2.0 Api documents.

swagger_index.html

Optional configuration

As documented here, you can customize SwaggerUI with options and plugins. This package supports that customization with the Plugins and UIConfig options. These may be set to generate plugin lines and configuration parameters in the generated SwaggerUI JavaScript.

In addition, BeforeScript and AfterScript options may be used to generate JavaScript before and after SwaggerUIBundle creation, respectively. BeforeScript may be used to declare a plugin, for example, and AfterScript may be used to run a block of JavaScript on page load.

A trivial example

To illustrate these options, take the following code:

package main

import (
	"net/http"

	"github.com/go-chi/chi"
	"github.com/swaggo/http-swagger/v2"
	_ "github.com/swaggo/http-swagger/example/go-chi/docs"
)

// @title Swagger Example API
// @version 1.0
// @description This is a sample server Petstore server.
// @termsOfService http://swagger.io/terms/

// @contact.name API Support
// @contact.url http://www.swagger.io/support
// @contact.email support@swagger.io

// @license.name Apache 2.0
// @license.url http://www.apache.org/licenses/LICENSE-2.0.html

// @host petstore.swagger.io
// @BasePath /v2
func main() {
	r := chi.NewRouter()

	r.Get("/swagger/*", httpSwagger.Handler(
		httpSwagger.URL("http://localhost:1323/swagger/doc.json"),
		httpSwagger.BeforeScript(`const SomePlugin = (system) => ({
    // Some plugin
  });
`),
		httpSwagger.AfterScript(`const someOtherCode = function(){
    // Do something
  };
  someOtherCode();`),
		httpSwagger.Plugins([]string{
			"SomePlugin",
			"AnotherPlugin",
		}),
		httpSwagger.UIConfig(map[string]string{
			"showExtensions":        "true",
			"onComplete":            `() => { window.ui.setBasePath('v3'); }`,
			"defaultModelRendering": `"model"`,
		}),
	))

	http.ListenAndServe(":1323", r)
}

When you then open Swagger UI and inspect the source JavaScript, you would see the following:

window.onload = function() {
  const SomePlugin = (system) => ({
    // Some plugin
  });

  const ui = SwaggerUIBundle({
    url: "swagger.json",
    deepLinking:  false ,
    docExpansion: "none",
    dom_id: "swagger-ui-id",
    validatorUrl: null,
    persistAuthorization: false,
    presets: [
      SwaggerUIBundle.presets.apis,
      SwaggerUIStandalonePreset
    ],
    plugins: [
      SwaggerUIBundle.plugins.DownloadUrl,
      SomePlugin,
      AnotherPlugin
    ],
    defaultModelRendering: "model",
    onComplete: () => { window.ui.setBasePath('v3'); },
    showExtensions: true,
    layout: "StandaloneLayout"
  })

  window.ui = ui
  const someOtherCode = function(){
    // Do something
  };
  someOtherCode();
}
A practical example

To illustrate a real use case, these options make it possible to dynamically set the API base path in the Swagger doc. The Swagger UI project has an open issue on how to achieve this with a plugin. That may be done as follows:

package main

import (
	"fmt"
	"net/http"
	"net/url"

	"github.com/go-chi/chi"
	"github.com/swaggo/http-swagger/v2"
	_ "github.com/swaggo/http-swagger/example/go-chi/docs"
)

// @title Swagger Example API
// @version 1.0
// @description This is a sample server Petstore server.
// @termsOfService http://swagger.io/terms/

// @contact.name API Support
// @contact.url http://www.swagger.io/support
// @contact.email support@swagger.io

// @license.name Apache 2.0
// @license.url http://www.apache.org/licenses/LICENSE-2.0.html

// @host petstore.swagger.io
// @BasePath /v2
func main() {
	r := chi.NewRouter()

	uri, err := url.Parse("http://localhost:1323/api/v3")
	if err != nil {
		panic(err)
	}

	r.Get("/swagger/*", httpSwagger.Handler(
		httpSwagger.URL("http://localhost:1323/swagger/doc.json"),
		httpSwagger.BeforeScript(`const UrlMutatorPlugin = (system) => ({
  rootInjects: {
    setScheme: (scheme) => {
      const jsonSpec = system.getState().toJSON().spec.json;
      const schemes = Array.isArray(scheme) ? scheme : [scheme];
      const newJsonSpec = Object.assign({}, jsonSpec, { schemes });

      return system.specActions.updateJsonSpec(newJsonSpec);
    },
    setHost: (host) => {
      const jsonSpec = system.getState().toJSON().spec.json;
      const newJsonSpec = Object.assign({}, jsonSpec, { host });

      return system.specActions.updateJsonSpec(newJsonSpec);
    },
    setBasePath: (basePath) => {
      const jsonSpec = system.getState().toJSON().spec.json;
      const newJsonSpec = Object.assign({}, jsonSpec, { basePath });

      return system.specActions.updateJsonSpec(newJsonSpec);
    }
  }
});`),
		httpSwagger.Plugins([]string{"UrlMutatorPlugin"}),
		httpSwagger.UIConfig(map[string]string{
			"onComplete": fmt.Sprintf(`() => {
    window.ui.setScheme('%s');
    window.ui.setHost('%s');
    window.ui.setBasePath('%s');
  }`, uri.Scheme, uri.Host, uri.Path),
		}),
	))

	http.ListenAndServe(":1323", r)
}

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var WrapHandler = Handler()

WrapHandler wraps swaggerFiles.Handler and returns http.HandlerFunc.

Functions

func AfterScript 

func AfterScript(js string) func(*Config)

AfterScript holds JavaScript to be run right after the Swagger UI object is created and set on the window.

func BeforeScript 

func BeforeScript(js string) func(*Config)

BeforeScript holds JavaScript to be run right before the Swagger UI object is created.

func DeepLinking 

func DeepLinking(deepLinking bool) func(*Config)

DeepLinking true, false.

func DefaultModelsExpandDepth added in v2.0.2 

func DefaultModelsExpandDepth(defaultModelsExpandDepth ModelsExpandDepthType) func(*Config)

DefaultModelsExpandDepth presents the model of response and request. set the default expansion depth for models

func DocExpansion 

func DocExpansion(docExpansion string) func(*Config)

DocExpansion list, full, none.

func DomID 

func DomID(domID string) func(*Config)

DomID #swagger-ui.

func Handler 

func Handler(configFns ...func(*Config)) http.HandlerFunc

Handler wraps `http.Handler` into `http.HandlerFunc`.

func InstanceName 

func InstanceName(name string) func(*Config)

InstanceName set the instance name that was used to generate the swagger documents Defaults to swag.Name ("swagger").

func Layout 

func Layout(layout SwaggerLayout) func(*Config)

Define Layout options are BaseLayout or StandaloneLayout

func PersistAuthorization 

func PersistAuthorization(persistAuthorization bool) func(*Config)

PersistAuthorization Persist authorization information over browser close/refresh. Defaults to false.

func Plugins 

func Plugins(plugins []string) func(*Config)

Plugins specifies additional plugins to load into Swagger UI.

func UIConfig 

func UIConfig(props map[string]string) func(*Config)

UIConfig specifies additional SwaggerUIBundle config object properties.

func URL 

func URL(url string) func(*Config)

URL presents the url pointing to API definition (normally swagger.json or swagger.yaml).

Types

type Config 

type Config struct {
	// The url pointing to API definition (normally swagger.json or swagger.yaml). Default is `doc.json`.
	URL                      string
	DocExpansion             string
	DomID                    string
	InstanceName             string
	BeforeScript             template.JS
	AfterScript              template.JS
	Plugins                  []template.JS
	UIConfig                 map[template.JS]template.JS
	DeepLinking              bool
	PersistAuthorization     bool
	Layout                   SwaggerLayout
	DefaultModelsExpandDepth ModelsExpandDepthType
}

Config stores httpSwagger configuration variables.

type ModelsExpandDepthType added in v2.0.2 

type ModelsExpandDepthType int
const (
	ShowModel ModelsExpandDepthType = 1
	HideModel ModelsExpandDepthType = -1
)

type SwaggerLayout 

type SwaggerLayout string
const (
	BaseLayout       SwaggerLayout = "BaseLayout"
	StandaloneLayout SwaggerLayout = "StandaloneLayout"
)

Source Files

View all Source files

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