go : gin jsonp

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

    r.GET("/JSONP?callback=x", func(c *gin.Context) {
        data := map[string]interface{}{
            "foo": "bar",
        }
        
        //callback is x
        // Will output  :   x({\"foo\":\"bar\"})
        c.JSONP(http.StatusOK, data)
    })

    // Listen and serve on 0.0.0.0:8080
    r.Run(":8080")

目录结构：
.
├── go.mod
├── go.sum
└── mian.go

结果：
$ curl http://127.0.0.1:8080/JSONP
{"foo":"bar"}

$ curl http://127.0.0.1:8080/JSONP?callback=x
x({"foo":"bar"});