Standard Output Format for all API endpoint

base_response.go

package main

import "github.com/gin-gonic/gin"

// Response : BaseResponse
// To get const output format for all endpoint
type Response struct {
	Meta  interface{} `json:"meta"`
	Error interface{} `json:"error"`
	Data  interface{} `json:"data"`
}

type user struct {
	Fname string `json:"fname"`
	Lname string `json:"lname"`
}

func main() {
	r := gin.Default()
	user1 := []user{
		user{
			Fname: "fname1",
			Lname: "lname1",
		},
		user{
			Fname: "fname2",
			Lname: "lname2",
		},
	}
	var br Response
	br.Data = user1
	br.Meta = "This is the meta tag"
	// br.Error = nil // not defining this to get all types, Data -> struct; Meta -> const string; Error -> nil
	r.GET("/ping", func(c *gin.Context) {
		c.JSON(200, br)
	})
	/*
		{
		"meta": "This is the meta tag",
		"error": null,
		"data": [
			{
			"fname": "fname1",
			"lname": "lname1"
			},
			{
			"fname": "fname2",
			"lname": "lname2"
			}
		]
		}
	*/
	r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080")
}