代码

    1. func main() {
    2.     r := gin.Default()
    3.     r.GET("/download", func(c *gin.Context) {
    4.         //fileName := "11.text"
    5.         fileName := "__UNI__9D9D531__20220422141746.apk"
    6.         c.Writer.Header().Add("Content-Disposition", fmt.Sprintf("attachment; filename=%s", fileName)) //fmt.Sprintf("attachment; filename=%s", filename)对下载的文件重命名
    7.         c.Writer.Header().Add("Content-Type", "application/octet-stream")
    8.         c.File("./static/" + fileName)
    9.     })
    10.     // Listen and Server in 0.0.0.0:8080
    11.     if err := r.Run(":8080"); err != nil {
    12.         log.Fatal(err)
    13.     }
    14. }

    文件目录
    image.png