upload.go

package api

import (

    "fmt"

    "os"

    "bytes"

    "mime/multipart"

    "path/filepath"

    "io"

    "net/http"

    "errors"

    "io/ioutil"

)

func Upload(host string, port int, dst string, src string) (err error) {

    fi, err := os.Stat(src)

    if os.IsNotExist(err) {

        return err

    }

    if fi.IsDir() {

        return fmt.Errorf("can't upload a directry: %s", src)

    }

    if dst[len(dst) - 1] == '/' {

        dst += filepath.Base(src)

    }

    var url string

    if dst[0] == '/' {

        url = fmt.Sprintf("http://%s:%d%s", host, port, dst)

    }else {

        url = fmt.Sprintf("http://%s:%d/%s", host, port, dst)

    }

    file, _ := os.Open(src)

    body := new(bytes.Buffer)

    mPart := multipart.NewWriter(body)

    filePart, err := mPart.CreateFormFile("file", filepath.Base(dst))

    if err != nil {

        return

    }

    _, err = io.Copy(filePart, file)

    if err != nil {

        return

    }

    mPart.Close()

    req, err := http.NewRequest(http.MethodPost, url, body)

    if err != nil {

        return

    }

    req.Header.Set("Content-Type", mPart.FormDataContentType())

    resp, err := http.DefaultClient.Do(req)

    if err != nil {

        return

    }

    defer resp.Body.Close()

    if resp.StatusCode != http.StatusCreated {

        body, _ := ioutil.ReadAll(resp.Body)

        err = errors.New(fmt.Sprintf("%d != http.StatusCreated  body: %s", resp.StatusCode, body))

    }

    return

}