I have the simplest form with submit button in my template.
<form action="/upload" method="POST" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="Submit">
And some function
func handleUploadedForm(w http.ResponseWriter, r *http.Request) {
r.ParseMultipartForm(1000000000)
file, header, err := r.FormFile("file")
defer file.Close()
if err != nil {
fmt.Println(err.Error())
return
}
How can i check if user submited empty form? fmt.Println(r.PostFormValue("file")) gives me empty string even if i submit valid file. So how can i check if input (name="file") was empty when submited?
header.Size will be 0 if the uploaded file was empty.
And err will be non-nil if no file was selected. But your example code already handles that case.