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基本介绍​

GoFrame 的 Server 默认自带的 OpenAPI 接口文档UI是 redoc 开源组件，该组件不支持页面 Try It Out 功能的。很多同学都在问，能否使用 SwaggerUI 页面来展示 OpenAPI 接口文档？有的企业内部并不支持连接外网的部分资源，那么能否将内部的接口文档UI替换为内部可访问的资源呢？

了解 OpenAPI 这个东东的小伙伴应该都知道， OpenAPI 只是通用的接口定义规范，而展示的接口文档UI是可以随便替换的， 并且这种UI界面以及平台还特别多！使用 GoFrame Server 来切换接口文档UI页面， 或者将接口文档对接到第三方接口文档平台 - 非常简单！详见示例： gf/example/httpserver/swagger-set-template/main.go

使用示例​

咱们通过代码来展示一下，如何快速地将接口文档UI切换为 SwaggerUI。 SwaggerUI 的相关链接：

main.go

package main

import (
    "context"
    "fmt"

    "github.com/gogf/gf/v2/frame/g"
    "github.com/gogf/gf/v2/net/ghttp"
)

// HelloReq hello request
type HelloReq struct {
    g.Meta `path:"/hello" method:"get" sort:"1"`
    Name   string `v:"required" dc:"Your name"`
}

// HelloRes hello response
type HelloRes struct {
    Reply string `dc:"Reply content"`
}

// Hello Controller
type Hello struct{}

// Say function
func (Hello) Say(ctx context.Context, req *HelloReq) (res *HelloRes, err error) {
    g.Log().Debugf(ctx, `receive say: %+v`, req)
    res = &HelloRes{
        Reply: fmt.Sprintf(`Hi %s`, req.Name),
    }
    return
}

const (
    MySwaggerUITemplate = `
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta name="description" content="SwaggerUI"/>
    <title>SwaggerUI</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/5.10.5/swagger-ui.min.css" />
</head>
<body>
<div id="swagger-ui"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/5.10.5/swagger-ui-bundle.js" crossorigin></script>
<script>
    window.onload = () => {
        window.ui = SwaggerUIBundle({
            url:    '{SwaggerUIDocUrl}',
            dom_id: '#swagger-ui',
        });
    };
</script>
</body>
</html>
`
)

func main() {
    s := g.Server()
    s.Use(ghttp.MiddlewareHandlerResponse)
    s.Group("/", func(group *ghttp.RouterGroup) {
        group.Bind(
            new(Hello),
        )
    })
    s.SetSwaggerUITemplate(MySwaggerUITemplate)
    s.Run()
}

config.yaml

server:
  address:     ":8199"
  openapiPath: "/api.json"
  swaggerPath: "/swagger"

我们这里只定义了一个 Hello 的接口。可以看到，我们通过一个接口来展示 SwaggerUI 的 HTML 页面，并且将 OpenAPI 的接口文件路径定义为 /api.json，没有启用 Server 自带的UI页面。执行后，终端输出：

2022-05-18 20:41:09.160 [INFO] openapi specification is serving at address: http://127.0.0.1:8199/api.json
2022-05-18 20:41:09.161 [INFO] pid[57888]: http server started listening on [:8199]

  ADDRESS | METHOD |   ROUTE   |                             HANDLER                             |    MIDDLEWARE
----------|--------|-----------|-----------------------------------------------------------------|--------------------
  :8199   | ALL    | /*        | github.com/gogf/gf/v2/net/ghttp.internalMiddlewareServerTracing | GLOBAL MIDDLEWARE
----------|--------|-----------|-----------------------------------------------------------------|--------------------
  :8199   | ALL    | /api.json | github.com/gogf/gf/v2/net/ghttp.(*Server).openapiSpec           |
----------|--------|-----------|-----------------------------------------------------------------|--------------------
  :8199   | GET    | /hello    | main.(*Hello).Say                                               |
----------|--------|-----------|-----------------------------------------------------------------|--------------------
  :8199   | GET    | /swagger  | main.main.func1.1                                               |
----------|--------|-----------|-----------------------------------------------------------------|--------------------

戳此链接访问： http://127.0.0.1:8199/swagger/

页面展示如下：

开发者自定义其他的接口文档UI类似如此。

常见UI模板​

swagger-ui​

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta name="description" content="SwaggerUI"/>
    <title>SwaggerUI</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/5.10.5/swagger-ui.min.css" />
</head>
<body>
<div id="swagger-ui"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/5.10.5/swagger-ui-bundle.js" crossorigin></script>
<script>
    window.onload = () => {
        window.ui = SwaggerUIBundle({
            url:    '{SwaggerUIDocUrl}',
            dom_id: '#swagger-ui',
        });
    };
</script>
</body>
</html>

openapi-ui​

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>openAPI UI</title>
  </head>
  <body>
    <div id="openapi-ui-container" spec-url="{SwaggerUIDocUrl}" theme="light"></div>
    <script src="https://cdn.jsdelivr.net/npm/openapi-ui-dist@latest/lib/openapi-ui.umd.js"></script>
  </body>
</html>