如何从Golang中的处理程序中处理文件

Question

I was wondering how to serve a file from a handler. I'm using go and gin and I've tried to do.

func DownloadHandler(c *gin.Context) {
   c.File("./downloads/file.zip")
}

and

func DownloadConfigs(c *gin.Context) {
   http.ServeFile(c.Writer, c.Request, "./downloads/file.zip")
}

and both of those solutions without the dot as well.

I'm open to any solution and because gin is compatible with the standard http lib, I can use non-gin specific solutions as well

Answer 1

Here is a complete working example using the standard http package. Please note, that the filename or path you use is relative to your current working directory.

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request)     {
        http.ServeFile(w, r, "file")
    })

    err := http.ListenAndServe(":8080", nil)
    if err != nil {
        log.Fatal("ListenAndServe: ", err)
    }
}