Echoswagger

Swagger UI generator for Echo framework

Feature

No SwaggerUI HTML/CSS dependency
Highly integrated with Echo, low intrusive design
Take advantage of the strong typing language and chain programming to make it easy to use
Recycle garbage in time, low memory usage

Installation

go get github.com/pangpanglabs/echoswagger

Go modules support

If your project has migrated to Go modules, you can:

Choose v2 version of Echoswagger for Echo version v4.
Choose v1 version of Echoswagger for Echo version <= v3 .

To use v2 version, just do:

go get github.com/pangpanglabs/echoswagger/v2
import github.com/labstack/echo/v4 and github.com/pangpanglabs/echoswagger/v2 in your project

Meanwhile, v1 version will still be updated if needed. For more details of Go modules, please refer to Go Wiki.

Example

package main

import (
	"net/http"

	"github.com/labstack/echo"
	"github.com/pangpanglabs/echoswagger"
)

func main() {
	// ApiRoot with Echo instance
	r := echoswagger.New(echo.New(), "/doc", nil)

	// Routes with parameters & responses
	r.POST("/", createUser).
		AddParamBody(User{}, "body", "User input struct", true).
		AddResponse(http.StatusCreated, "successful", nil, nil)

	// Start server
	r.Echo().Logger.Fatal(r.Echo().Start(":1323"))
}

type User struct {
	Name string
}

// Handler
func createUser(c echo.Context) error {
	return c.JSON(http.StatusCreated, nil)
}

Usage

Create a `ApiRoot` with `New()`, which is a wrapper of `echo.New()`

r := echoswagger.New(echo.New(), "/doc", nil)

You can use the result ApiRoot instance to:

Setup Security definitions, request/response Content-Types, UI options, Scheme, etc.

r.AddSecurityAPIKey("JWT", "JWT Token", echoswagger.SecurityInHeader).
	SetRequestContentType("application/x-www-form-urlencoded", "multipart/form-data").
	SetUI(UISetting{HideTop: true}).
	SetScheme("https", "http")

Get echo.Echo instance.

r.Echo()

Registers a new GET, POST, PUT, DELETE, OPTIONS, HEAD or PATCH route in default group, these are wrappers of Echo's create route methods. It returns a new Api instance.

r.GET("/:id", handler)

And: ↓

Create a `ApiGroup` with `Group()`, which is a wrapper of `echo.Group()`

g := r.Group("Users", "/users")

You can use the result ApiGroup instance to:

Set description, etc.

g.SetDescription("The desc of group")

Set security for all routes in this group.

g.SetSecurity("JWT")

Get echo.Group instance.

g.EchoGroup()

And: ↓

Registers a new route in `ApiGroup`

GET, POST, PUT, DELETE, OPTIONS, HEAD or PATCH methods are supported by Echoswagger, these are wrappers of Echo's create route methods.

a := g.GET("/:id", handler)

You can use the result Api instance to:

Add parameter with these methods:

AddParamPath(p interface{}, name, desc string)

AddParamPathNested(p interface{})

AddParamQuery(p interface{}, name, desc string, required bool)

AddParamQueryNested(p interface{})

AddParamForm(p interface{}, name, desc string, required bool)

AddParamFormNested(p interface{})

AddParamHeader(p interface{}, name, desc string, required bool)

AddParamHeaderNested(p interface{})

AddParamBody(p interface{}, name, desc string, required bool)

AddParamFile(name, desc string, required bool)

The methods which name's suffix are Nested means these methods treat parameter p 's fields as paramters, so it must be a struct type.

e.g.

type SearchInput struct {
	Q         string `query:"q" swagger:"desc(Keywords),required"`
	SkipCount int    `query:"skipCount"`
}
a.AddParamQueryNested(SearchInput{})

Is equivalent to:

a.AddParamQuery("", "q", "Keywords", true).
	AddParamQuery(0, "skipCount", "", false)

Add responses.

a.AddResponse(http.StatusOK, "response desc", body{}, nil)

Set Security, request/response Content-Types, summary, description, etc.

a.SetSecurity("JWT").
	SetResponseContentType("application/xml").
	SetSummary("The summary of API").
	SetDescription("The desc of API")

Get echo.Route instance.

a.Route()

With `swagger` tag, you can set more info with `AddParam...` methods.

e.g.

type User struct {
	Age    int       `swagger:"min(0),max(99)"`
	Gender string    `swagger:"enum(male|female|other),required"`
	Money  []float64 `swagger:"default(0),readOnly"`
}
a.AddParamBody(&User{}, "Body", "", true)

The definition is equivalent to:

{
    "definitions": {
        "User": {
            "type": "object",
            "properties": {
                "Age": {
                    "type": "integer",
                    "format": "int32",
                    "minimum": 0,
                    "maximum": 99
                },
                "Gender": {
                    "type": "string",
                    "enum": [
                        "male",
                        "female",
                        "other"
                    ],
                    "format": "string"
                },
                "Money": {
                    "type": "array",
                    "items": {
                        "type": "number",
                        "default": 0,
                        "format": "double"
                    },
                    "readOnly": true
                }
            },
            "required": [
                "Gender"
            ]
        }
    }
}

Supported swagger tags:

Tag	Type	Description
desc	`string`	Description.
min	`number`	-
max	`number`	-
minLen	`integer`	-
maxLen	`integer`	-
allowEmpty	`boolean`	Sets the ability to pass empty-valued parameters. This is valid only for either `query` or `formData` parameters and allows you to send a parameter with a name only or an empty value. Default value is `false`.
required	`boolean`	Determines whether this parameter is mandatory. If the parameter is `in` "path", this property is `true` without setting. Otherwise, the property MAY be included and its default value is `false`.
readOnly	`boolean`	Relevant only for Schema `"properties"` definitions. Declares the property as "read only". This means that it MAY be sent as part of a response but MUST NOT be sent as part of the request. Properties marked as `readOnly` being `true` SHOULD NOT be in the `required` list of the defined schema. Default value is `false`.
enum	[*]	Enumerate value, multiple values should be separated by "\|"
default	*	Default value, which type is same as the field's type.

Reference

OpenAPI Specification 2.0

License

MIT

jaehue/echoswagger