Question

我想弄清楚如何在Go中接受/接收HTTP Post。我只是希望能够接收文件，获取其mime类型并在本地保存文件。

我一整天都在搜索，但我能找到的就是如何将文件发送到某个远程位置，但我发现的任何一个例子都没有收到它。

任何帮助将不胜感激。

使用Justinas的例子，并与我现有的实验混合，我已经得到了这么多，但m.Post似乎永远不会被称为。

package main

import (
    "fmt"
    "io"
    "net/http"
    "os"
    "github.com/codegangsta/martini"
    "github.com/codegangsta/martini-contrib/render"
)

func main() {

    m := martini.Classic()

    m.Use(render.Renderer(render.Options{
        Directory: "templates", // Specify what path to load the templates from.
        Layout: "layout", // Specify a layout template. Layouts can call {{ yield }} to render the current template.
        Charset: "UTF-8", // Sets encoding for json and html content-types.
    }))


    m.Get("/", func(r render.Render) {
        fmt.Printf("%v\n", "g./")
        r.HTML(200, "hello", "world")
    })

    m.Get("/:who", func(args martini.Params, r render.Render) {
        fmt.Printf("%v\n", "g./:who")
        r.HTML(200, "hello", args["who"])
    })

    m.Post("/up", func(w http.ResponseWriter, r *http.Request) {
        fmt.Printf("%v\n", "p./up")

        file, header, err := r.FormFile("file")
        defer file.Close()

        if err != nil {
            fmt.Fprintln(w, err)
            return
        }

        out, err := os.Create("/tmp/file")
        if err != nil {
            fmt.Fprintf(w, "Failed to open the file for writing")
            return
        }
        defer out.Close()
        _, err = io.Copy(out, file)
        if err != nil {
            fmt.Fprintln(w, err)
        }

        // the header contains useful info, like the original file name
        fmt.Fprintf(w, "File %s uploaded successfully.", header.Filename)
    })

    m.Run()
}

Answer 1

Go的net/http服务器在幕后使用mime/multipart包来处理这个问题。您只需致电r.FormFile()上的*http.Request即可获得multipart.File。

Here's a complete example。以及使用curl上传文件的结果：

justinas@ubuntu /tmp curl -i -F file=@/tmp/stuff.txt http://127.0.0.1:8080/
HTTP/1.1 100 Continue

HTTP/1.1 200 OK
Date: Tue, 24 Dec 2013 20:56:07 GMT
Content-Length: 37
Content-Type: text/plain; charset=utf-8

File stuff.txt uploaded successfully.%                                                                                              
justinas@ubuntu /tmp cat file
kittens!

Go - 接受http post multipart文件

1 个答案: