go+gin实现文件预览

r := gin.Default()
//Get路由，动态路由
r.GET("/GetFile/:name", DowFile)

// DowFile 文件在线预览
func DowFile(c *gin.Context){
    //通过动态路由方式获取文件名，以实现下载不同文件的功能
    name:=c.Param("name")
    uploadType := c.Query("type")
    fmt.Println(uploadType)
    fmt.Println(name)
    var uploadT = ""
    if uploadType =="1" {
        uploadT ="teaching"
    }else {
        uploadT ="professional"
    }
    var localPath = "./dataset/"+uploadT+"/"+name
    err:=minioTest.DownloadObject(uploadT, name, localPath)
    fmt.Println("**************")
    fmt.Println(err)
    if err =="error"{
        c.HTML(http.StatusOK, "error.html", gin.H{
            "title": "error",
        })
    }else{
        //拼接路径,如果没有这一步，则默认在当前路径下寻找
        //filename:=path.Join("./dataset/professional/",name)
        filename:=path.Join("./dataset/"+uploadT+"/",name)
        //响应一个文件
        c.File(filename)
        return
    }

}