如何与Gin集成

点击此处查看示例源代码。

1. 使用swag init生成Swagger2.0文档后，导入如下代码包：

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

2. 在main.go源代码中添加通用的API注释：

// @title           Swagger Example API
// @version         1.0
// @description     This is a sample server celler 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      localhost:8080
// @BasePath  /api/v1

// @securityDefinitions.basic  BasicAuth
func main() {
    r := gin.Default()

    c := controller.NewController()

    v1 := r.Group("/api/v1")
    {
        accounts := v1.Group("/accounts")
        {
            accounts.GET(":id", c.ShowAccount)
            accounts.GET("", c.ListAccounts)
            accounts.POST("", c.AddAccount)
            accounts.DELETE(":id", c.DeleteAccount)
            accounts.PATCH(":id", c.UpdateAccount)
            accounts.POST(":id/images", c.UploadAccountImage)
        }
    //...
    }
    r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
    r.Run(":8080")
}
//...

此外，可以动态设置一些通用的API信息。生成的代码包docs导出SwaggerInfo变量，使用该变量可以通过编码的方式设置标题、描述、版本、主机和基础路径。使用Gin的示例：

package main

import (
    "github.com/gin-gonic/gin"
    "github.com/swaggo/files"
    "github.com/swaggo/gin-swagger"

    "./docs" // docs is generated by Swag CLI, you have to import it.
)

// @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
func main() {

    // programatically set swagger info
    docs.SwaggerInfo.Title = "Swagger Example API"
    docs.SwaggerInfo.Description = "This is a sample server Petstore server."
    docs.SwaggerInfo.Version = "1.0"
    docs.SwaggerInfo.Host = "petstore.swagger.io"
    docs.SwaggerInfo.BasePath = "/v2"
    docs.SwaggerInfo.Schemes = []string{"http", "https"}

    r := gin.New()

    // use ginSwagger middleware to serve the API docs
    r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))

    r.Run()
}

3. 在controller代码中添加API操作注释：

package controller

import (
    "fmt"
    "net/http"
    "strconv"

    "github.com/gin-gonic/gin"
    "github.com/swaggo/swag/example/celler/httputil"
    "github.com/swaggo/swag/example/celler/model"
)

// ShowAccount godoc
// @Summary      Show an account
// @Description  get string by ID
// @Tags         accounts
// @Accept       json
// @Produce      json
// @Param        id   path      int  true  "Account ID"
// @Success      200  {object}  model.Account
// @Failure      400  {object}  httputil.HTTPError
// @Failure      404  {object}  httputil.HTTPError
// @Failure      500  {object}  httputil.HTTPError
// @Router       /accounts/{id} [get]
func (c *Controller) ShowAccount(ctx *gin.Context) {
  id := ctx.Param("id")
  aid, err := strconv.Atoi(id)
  if err != nil {
    httputil.NewError(ctx, http.StatusBadRequest, err)
    return
  }
  account, err := model.AccountOne(aid)
  if err != nil {
    httputil.NewError(ctx, http.StatusNotFound, err)
    return
  }
  ctx.JSON(http.StatusOK, account)
}

// ListAccounts godoc
// @Summary      List accounts
// @Description  get accounts
// @Tags         accounts
// @Accept       json
// @Produce      json
// @Param        q    query     string  false  "name search by q"  Format(email)
// @Success      200  {array}   model.Account
// @Failure      400  {object}  httputil.HTTPError
// @Failure      404  {object}  httputil.HTTPError
// @Failure      500  {object}  httputil.HTTPError
// @Router       /accounts [get]
func (c *Controller) ListAccounts(ctx *gin.Context) {
  q := ctx.Request.URL.Query().Get("q")
  accounts, err := model.AccountsAll(q)
  if err != nil {
    httputil.NewError(ctx, http.StatusNotFound, err)
    return
  }
  ctx.JSON(http.StatusOK, accounts)
}
//...

swag init

4. 运行程序，然后在浏览器中访问 http://localhost:8080/swagger/index.html 。将看到Swagger 2.0 Api文档，如下所示：