go upload

README.md

go run server.go

curl

curl -v -H 'Content-Type: multipart/form-data' -F "uploadfile=@./sample_video.mp4" -k http://localhost:8080/upload

server.go

package main

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"time"
)

type fileData struct {
	File string `json:"file"`
}

func main() {
	http.HandleFunc("/", hello)
	http.HandleFunc("/upload", handleUpload)
	http.ListenAndServe(":8080", nil)
}

func hello(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("hello!"))
}

func handleUpload(w http.ResponseWriter, r *http.Request) {
	const maxUploadSize = 2 * 1024 * 1024 // 2MB
	fmt.Printf("maxUploadSize: %v, headerContentLength: %v", maxUploadSize, r.Header.Get("Content-Length"))
	r.Body = http.MaxBytesReader(w, r.Body, maxUploadSize)
	if err := r.ParseMultipartForm(maxUploadSize); err != nil {
		panic(err)
	}
	file, handler, err := r.FormFile("uploadfile")
	if err != nil {
		panic(err)
	}
	defer file.Close()

	filepath := "./" + time.Now().Format("20060102_150405") + "_" + handler.Filename
	f, err := os.OpenFile(filepath, os.O_WRONLY|os.O_CREATE, 0666)
	if err != nil {
		panic(err)
	}
	defer f.Close()
	io.Copy(f, file)

	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	json.NewEncoder(w).Encode(fileData{filepath})
}