I send the form to the server to which I attach the image files. Initially, the number of pictures is not known. The form has this form
<input type="file" name="file_1"> If the user has added several photos, then there will be
<input type="file" name="file_1"> <input type="file" name="file_2"> I take data from one file so file, _, err := r.FormFile("file_1")
How to go find out the number of files and sort through each of them?