uploader/main.go

package main

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
)

func getRoot(w http.ResponseWriter, r *http.Request) {
	fmt.Printf("Received connection\n")
	file, err := os.Open("./index.html")
	if err != nil {
		log.Printf("Error happened opening index.html: %v\n", err)
	}
	defer file.Close()
	data, err := io.ReadAll(file)
	if err != nil {
		log.Printf("Error happened reading data: %v\n", err)
	}
	fmt.Fprint(w, string(data))
}

func uploadFile(w http.ResponseWriter, r *http.Request) {
	fmt.Printf("Received upload!\n")
	fmt.Fprintln(w, "You have uploaded something")

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

	if err != nil {
		log.Printf("Error happened receiving file: %v\n", err)
	}
	fmt.Fprintf(w, "%v", header.Header)
	f, err := os.OpenFile("./temp/"+header.Filename, os.O_WRONLY|os.O_CREATE, 0660)
	if err != nil {
		log.Printf("Error happened opening file: %v\n", err)
	}
	io.Copy(f, file)

	defer file.Close()
}

func main() {
	http.HandleFunc("/", getRoot)
	http.HandleFunc("/api/upload", uploadFile)

	fmt.Println("Listening on port 8080...")

	err := http.ListenAndServe(":8080", nil)
	if err != nil {
		log.Fatal(err)
	}
}