client's directory "download"에 index_html_file.txt 가 저장됭.
check
초기화면 index.html download에
file_download/index.php server에 uploads
file_download/index1.html client's download에
file_download/index2.html client's download directory에
file_download/index3.html server에 uploads
file_download/index4.html client's selected directory에