<?php
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function ftp_fetch_if_newer($url, $file = NULL) {
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$url = parse_url($url);
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if(!isset($url['scheme']) || $url['scheme'] != 'ftp') {
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throw new Exception('Only FTP URLs are supported');
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}
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if(!isset($url['host'])) {
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throw new Exception('Hostname not present in the URL');
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}
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if(!isset($url['path'])) {
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throw new Exception('Path component not present in the URL');
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}
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if(!isset($url['port'])) {
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$url['port'] = 21;
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}
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if(!isset($url['user'])) {
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$url['user'] = 'anonymous';
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}
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if(!isset($url['pass'])) {
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$url['pass'] = 'anonymous@mpk.jacekk.net';
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}
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if($file == NULL) {
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$file = basename($url['path']);
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}
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$localTime = -1;
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$localSize = -1;
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if(is_file($file)) {
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$localTime = filemtime($file);
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$localSize = filesize($file);
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}
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$ftp = FtpConnection::create($url['host'], $url['port'], $url['user'], $url['pass']);
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$remoteSize = $ftp->size($url['path']);
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$remoteTime = $ftp->mdtm($url['path']);
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$updated = FALSE;
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if($localTime < $remoteTime || ($localTime == $remoteTime && $localSize != $remoteSize)) {
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if(file_exists($file.'.tmp')) {
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unlink($file.'.tmp');
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}
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$ftp->get($file.'.tmp', $url['path'], FTP_BINARY);
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touch($file.'.tmp', $remoteTime);
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if(!rename($file.'.tmp', $file)) {
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throw new Exception('Temporary file rename failed');
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}
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$updated = TRUE;
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}
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return $updated;
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}
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function fetch($url, $file = NULL) {
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if($file == NULL) {
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$file = basename($url['url']);
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}
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$data = file_get_contents($url);
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if($data === FALSE) {
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throw new Exception('URL fetch failed');
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}
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if(file_put_contents($file.'.tmp', $data) === FALSE) {
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throw new Exception('Temporary file creation failed');
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}
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if(!rename($file.'.tmp', $file)) {
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throw new Exception('Temporary file rename failed');
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}
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}
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