| commit | author | age | ||
| 4673cc | 1 | <?php |
| JK | 2 | function ftp_fetch_if_newer($url, $file = NULL) { |
| 3 | $url = parse_url($url); | |
| 4 | if(!isset($url['scheme']) || $url['scheme'] != 'ftp') { | |
| 5 | throw new Exception('Only FTP URLs are supported'); | |
| 6 | } | |
| 7 | if(!isset($url['host'])) { | |
| 8 | throw new Exception('Hostname not present in the URL'); | |
| 9 | } | |
| 10 | if(!isset($url['path'])) { | |
| 11 | throw new Exception('Path component not present in the URL'); | |
| 12 | } | |
| 13 | if(!isset($url['port'])) { | |
| 14 | $url['port'] = 21; | |
| 15 | } | |
| 16 | if(!isset($url['user'])) { | |
| 17 | $url['user'] = 'anonymous'; | |
| 18 | } | |
| 19 | if(!isset($url['pass'])) { | |
| 20 | $url['pass'] = 'anonymous@mpk.jacekk.net'; | |
| 21 | } | |
| 22 | if($file == NULL) { | |
| 23 | $file = basename($url['path']); | |
| 24 | } | |
| 25 | ||
| 26 | $localTime = -1; | |
| 27 | $localSize = -1; | |
| 28 | if(is_file($file)) { | |
| 29 | $localTime = filemtime($file); | |
| 30 | $localSize = filesize($file); | |
| 31 | } | |
| 32 | ||
| 33 | $ftp = ftp_connect($url['host'], $url['port'], 10); | |
| 34 | if($ftp === FALSE) { | |
| 35 | throw new Exception('FTP connection failed'); | |
| 36 | } | |
| 37 | if(!ftp_login($ftp, $url['user'], $url['pass'])) { | |
| 38 | throw new Exception('FTP login failed'); | |
| 39 | } | |
| 40 | if(!ftp_pasv($ftp, TRUE)) { | |
| 41 | throw new Exception('Passive FTP request failed'); | |
| 42 | } | |
| 43 | $remoteSize = ftp_size($ftp, $url['path']); | |
| 44 | if($remoteSize < 0) { | |
| 45 | throw new Exception('FTP file size fetch failed'); | |
| 46 | } | |
| 47 | $remoteTime = ftp_mdtm($ftp, $url['path']); | |
| 48 | if($remoteTime < 0) { | |
| 49 | throw new Exception('FTP modification time fetch failed'); | |
| 50 | } | |
| 51 | ||
| 52 | $updated = FALSE; | |
| 53 | ||
| 54 | if($localSize != $remoteSize || $localTime < $remoteTime) { | |
| 55 | if(file_exists($file.'.tmp')) { | |
| 56 | unlink($file.'.tmp'); | |
| 57 | } | |
| 58 | if(ftp_get($ftp, $file.'.tmp', $url['path'], FTP_BINARY)) { | |
| 59 | touch($file.'.tmp', $remoteTime); | |
| 60 | if(!rename($file.'.tmp', $file)) { | |
| 61 | throw new Exception('Temporary file rename failed'); | |
| 62 | } | |
| 63 | $updated = TRUE; | |
| 64 | } | |
| 65 | } | |
| 66 | ||
| 67 | ftp_close($ftp); | |
| 68 | ||
| 69 | return $updated; | |
| 70 | } | |
| 71 | ||
| 72 | function fetch($url, $file = NULL) { | |
| 73 | if($file == NULL) { | |
| 74 | $file = basename($url['url']); | |
| 75 | } | |
| 76 | $data = file_get_contents($url); | |
| 77 | if($data === FALSE) { | |
| 78 | throw new Exception('URL fetch failed'); | |
| 79 | } | |
| 80 | if(file_put_contents($file.'.tmp', $data) === FALSE) { | |
| 81 | throw new Exception('Temporary file creation failed'); | |
| 82 | } | |
| 83 | if(!rename($file.'.tmp', $file)) { | |
| 84 | throw new Exception('Temporary file rename failed'); | |
| 85 | } | |
| 86 | } | |
