go golang upload download file

//DOWNLOAD FILE

package main

import (

"fmt"

download "github.com/joeybloggs/go-download"

"io"

"log"

"os"

)

func main() {

// no options specified so will default to 10 concurrent download by default

f, err := download.Open("http://192.168.1.105:8887/remarkable_1.87_all.deb", nil)

if err != nil {

log.Fatal(err)

}

defer f.Close()

// f implements io.Reader, write file somewhere or do some other sort of work with it

mf, err := os.Create("a.deb")

if err != nil {

fmt.Println(err)

return

}

_, err = io.Copy(mf, f)

if err != nil {

fmt.Println(err)

return

}

fmt.Println("OK")

}

//POST FILE

package main

import (
"bytes"
"fmt"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"os"
)

func postFile(filename string, targetUrl string) error {
bodyBuf := &bytes.Buffer{}
bodyWriter := multipart.NewWriter(bodyBuf)
fileWriter, err := bodyWriter.CreateFormFile("uploadFile", filename)
if err != nil {
fmt.Println("error writing to buffer")
return err
}
fh, err := os.Open(filename)
if err != nil {
fmt.Println("error opening file")
return err
}
_, err = io.Copy(fileWriter, fh)
if err != nil {
return err
}
contentType := bodyWriter.FormDataContentType()
bodyWriter.Close()
resp, err := http.Post(targetUrl, contentType, bodyBuf)
if err != nil {
return err
}
defer resp.Body.Close()
resp_body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
fmt.Println(string(resp_body))
return nil
}



func main() {
target_url := "http://localhost:8090/upload"
filename := "./a"
postFile(filename, target_url)
}