golang upload client and server

upload.go

// curl -X POST -H "Content-Type: application/octet-stream" --data-binary '@filename' http://127.0.0.1:5050/upload

package main

import (
	"fmt"
	"io"
	"net/http"
	"os"
	"time"
	"io/ioutil"
)

func uploadHandler(w http.ResponseWriter, r *http.Request) {
	file, err := os.Create("./result")
	if err != nil {
		panic(err)
	}
	n, err := io.Copy(file, r.Body)
	if err != nil {
		panic(err)
	}

	w.Write([]byte(fmt.Sprintf("%d bytes are recieved.\n", n)))
}

func main() {
	http.HandleFunc("/upload", uploadHandler)

	go func() {
		time.Sleep(time.Second * 1)
		upload()
	}()

	http.ListenAndServe(":5050", nil)
}

func upload() {
	file, err := os.Open("./filename")
	if err != nil {
		panic(err)
	}
	defer file.Close()

	res, err := http.Post("http://127.0.0.1:5050/upload", "binary/octet-stream", file)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	message, _ := ioutil.ReadAll(res.Body)
	fmt.Printf(string(message))
}

https://gist.github.com/ebraminio/576fdfdff425bf3335b51a191a65dbdb#file-upload-go-L15 file ไม่ได้ Close นะครับ

https://gist.github.com/anujsinghwd/a5b07db628012b99f875a431d081a490

Thank you for this it helped me in writing my go file upload handler

I'm gonna to try it.

@ebraminio, this code works well. Good job!
Quick question:
what are you doing with the anonymous go routine at line# 30 - 33 & the func upload()? Are they necessary?
Program works even if I commented them. Shall we safely ignore them?

Sorry for the very late, probably will be useful for others at least,

Are they necessary?

No, it's only for testing

Shall we safely ignore them?

Sure.