Golang gin pass a default value

I have api and diffrenet routes like /v1.1/test and /v1/test for this two route I run different worker version which is v1.1 or v1, My question is how can I pass this version info to router

This is my main.go

   v1 := router.Group("/v1")
   {
   	v1.GET("/test", getTest)
)
   }

   v1_1 := router.Group("/v1.1")
   {

   	v1_1.GET("/test", getTest)
   }

In here I have getTest function

func getTest(c *gin.Context) {

    fmt.Println(<I want to print version>)
	task, err := zr.Push("test_v1", Test{Task: "exchanges"})
	getTestResponse(c, task, err)
}

And I have a possible solution which is using closure, may be can solve it, but I could not do it

gin can process parameters in path through Context like this:

package main

import (
	"github.com/gin-gonic/gin"
	"net/http"
)

func main() {
	router := gin.Default()

	router.GET("/:version/test", getTest)

	router.Run(":8080")
}

func getTest(c *gin.Context) {
	version := c.Param("version")
	c.String(http.StatusOK, "version: %s\n", version)
}

output

$ curl 'http://localhost:8080/v1/test'  
version: v1
$ curl 'http://localhost:8080/v1.1/test'
version: v1.1

you can find more details here: https://github.com/gin-gonic/gin#querystring-parameters

Warning : I don't use gin. But see below nonetheless.

A closure may do the trick. When you build a closure, always try to think about what type of function you need, and create a function that will return this type. In your case, you need a gin handler.

Here is an example where you can act differently based on the version :

func getTest(version string) func(c *gin.Context) {
	return func(c *gin.Context) {
		switch version {
		case "v1":
		// do what you need to do to handle old version
		default:
		// do something else by default
		}
	}
}

Or if you simply want to print like you do in your trivial example :

func getTest(version string) func(c *gin.Context) {
	return func(c *gin.Context) {
		fmt.Println(version)
		task, err := zr.Push("test_" + version, Test{Task: "exchanges"})
		getTestResponse(c, task, err)
	}
}

Now, you can wrap that in your router :

v1 := router.Group("/v1")
{
	v1.GET("/test", getTest("v1"))
}

v1_1 := router.Group("/v1.1")
{
	v1_1.GET("/test", getTest("v1.1"))
}