nikolaydubina/http_server_large_file_upload_example.go

## http_server_large_file_upload_example.go
// locally can upload tens of GBs
package main

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

const uploadPageHTML = `
<!DOCTYPE html>
<html>
<body>
<form action="/upload" enctype="multipart/form-data" method="post">
    <input type="file" name="file">
    <input type="submit" name="submit">
</form>
</body>
</html>
`

func upload(w http.ResponseWriter, r *http.Request) {
	r.ParseMultipartForm(1024 * 1024 * 1024 * 1024)
	file, handler, _ := r.FormFile("file")
	defer file.Close()
	fmt.Fprintf(w, "%v", handler.Header)
	dir, _ := os.Getwd()
	f, _ := os.OpenFile(path.Join(dir, handler.Filename), os.O_WRONLY|os.O_CREATE, 0666)
	defer f.Close()
	io.Copy(f, file)
}

func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, uploadPageHTML) })
	http.HandleFunc("/upload", upload)
	http.ListenAndServe(":8090", nil)
}
	// locally can upload tens of GBs
	package main

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

	const uploadPageHTML = `
	<!DOCTYPE html>
	<html>
	<body>
	<form action="/upload" enctype="multipart/form-data" method="post">
	<input type="file" name="file">
	<input type="submit" name="submit">
	</form>
	</body>
	</html>
	`

	func upload(w http.ResponseWriter, r *http.Request) {
	r.ParseMultipartForm(1024 * 1024 * 1024 * 1024)
	file, handler, _ := r.FormFile("file")
	defer file.Close()
	fmt.Fprintf(w, "%v", handler.Header)
	dir, _ := os.Getwd()
	f, _ := os.OpenFile(path.Join(dir, handler.Filename), os.O_WRONLY\|os.O_CREATE, 0666)
	defer f.Close()
	io.Copy(f, file)
	}

	func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, uploadPageHTML) })
	http.HandleFunc("/upload", upload)
	http.ListenAndServe(":8090", nil)
	}