질문답변코너의 불당님의 질문으로 접근해본 cafe24의 CDN 서비스 이용하기
http://www.sir.co.kr/bbs/board.php?bo_table=g4_qa&wr_id=37839
http://www.sir.co.kr/bbs/board.php?bo_table=g4_qa&wr_id=37934


사용을 위한 조건
    1. cafe24의 image CDN 서비스를 사용할수있어야 한다.
    2. cheditor 에서 제공하는 기능으로 이미지 업로드시에 적용된다.
      (그누보드에서 제공하는 이미지 업로드는 해당사항없음)


수정파일 :
    $g4_path/cheditor/insert_image.php

수정전 :
    if ($success) {
        $filename = $save_as_url . $attach->file['name'];

수정후 :
    if ($success) {

        $ncftp_info = "/usr/bin/ncftpput -u 아이디 -p 비밀번호 -m -DD iup.cdn1.cafe24.com ";
        $remote_dir = "/www/$g4[editor]/$ym/ ";
        $local_file = $save_as_url . $attach->file['name'];
        $ncftp_cmd = $ncftp_info . $remote_dir . $local_file;
        system($ncftp_cmd, $status);

        // ncftp에서 -DD 옵션을 사용했으므로 파일의 유무에 따라서 성공여부 결정
        if(!file_exists($local_tmp)) {
            $save_as_url = "http://아이디.cdn1.cafe24.com/$g4[editor]/$ym/";
        }

        $filename = $save_as_url . $attach->file['name'];


## CDN(Contents Delivery Network) 호스팅이란
  여러곳의 IDC 또는 여러대의 ISP에 동일한 컨텐츠를 올려놓고,
  접속자가 사용하는 인터넷회선의 종류에 따라 가장 가까운 곳에서
  컨텐츠를 불러들일 수 있도록 지원하는 서비스입니다. (cafe24의 설명)
  http://hosting.cafe24.com/cdn/cdn_define.php


## ncftpput의 간략설명
NcFTPPut 3.1.8

Usages:
  ncftpput [flags] remote-host remote-dir local-files...  (mode 1)
  ncftpput -f login.cfg [flags] remote-dir local-files...  (mode 2)
  ncftpput -c remote-host remote-path-name < stdin  (mode 3)

Flags:
  -u XX  Use username XX instead of anonymous.
  -p XX  Use password XX with the username.
  -P XX  Use port number XX instead of the default FTP service port (21).
  -j XX  Use account XX with the account (deprecated).
  -d XX  Use the file XX for debug logging.
  -e XX  Use the file XX for error logging.
  -U XX  Use value XX for the umask.
  -t XX  Timeout after XX seconds.
  -a    Use ASCII transfer type instead of binary.
  -m    Attempt to mkdir the dstdir before copying.
  -v/-V  Do (do not) use progress meters.
  -f XX  Read the file XX for host, user, and password information.
  -c    Use stdin as input file to write on remote host.
  -A    Append to remote files instead of overwriting them.
  -z/-Z  Do (do not) try to resume uploads (default: -Z).
  -T XX  Upload into temporary files prefixed by XX.
  -S XX  Upload into temporary files suffixed by XX.
  -DD    Delete local file after successfully uploading it.
  -b    Run in background (submit job to "ncftpbatch" and run).
  -bb    Same as "-b" but queue only (do not run "ncftpbatch").
  -E    Use regular (PORT) data connections.
  -F    Use passive (PASV) data connections (default).
  -y    Try using "SITE UTIME" to preserve timestamps on remote host.
  -B XX  Try setting the SO_SNDBUF size to XX.
  -r XX  Redial XX times until connected.
  -o XX  Specify miscellaneous options (see documentation).
  -W XX  Send raw FTP command XX after logging in.
  -X XX  Send raw FTP command XX after each file transferred.
  -Y XX  Send raw FTP command XX before logging out.
  -R    Recursive mode; copy whole directory trees.

Examples:
  ncftpput -u gleason -p my.password Elwood.probe.net /home/gleason stuff.txt
  ncftpput -u gleason Elwood.probe.net /home/gleason a.txt (prompt for pass)
  ncftpput -a -u gleason -p my.password -m -U 007 Bozo.probe.net /tmp/tmpdir a.txt
  tar cvf - /home | ncftpput -u operator -c Server.probe.net /backups/monday.tar

Library version: LibNcFTP 3.1.8 (May 26, 2004).

This is a freeware program by Mike Gleason (http://www.ncftp.com).
This was built using LibNcFTP (http://www.ncftp.com/libncftp/).