Golang：将Gin与UDP服务器混合

I'm trying to use both a UDP server to listen continuously to datagrams and a http server, but the string "UDP server up and listening on port..." and command "server.Run()" are never reached.

package main

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

func handleUDPConnection(conn *net.UDPConn) {
    buffer := make([]byte, 8096)
    n, addr, err := conn.ReadFromUDP(buffer)

    if err != nil {
        log.Fatal(err)
    } else {
        fmt.Println("UDP client: ", addr)
        fmt.Println("Received from UDP client: ", string(buffer[:n]))
    }
}

func main() {
    server := gin.Default()
    host, port := "localhost", "41234"
    udpAddr, err := net.ResolveUDPAddr("udp4", fmt.Sprintf("%s:%s", host, port))

    if err != nil {
        log.Fatal(err)
    }

    conn, err := net.ListenUDP("udp", udpAddr)
    if err != nil {
        log.Fatal(err)
    }

    defer conn.Close()
    server.GET("/ping", func(c *gin.Context) {
        c.JSON(200, gin.H{"message": "pong"})
    })

    for {
        handleUDPConnection(conn)
    }

    fmt.Sprintf("UDP server up and listening on port %s
", port)
    server.Run()
}

How can I make it work?