+/**
+* Downloads a url to a local file using the Snoopy HTTP Class
+*
+* @param string $url the URL of the file to download
+* @return mixed WP_Error on failure, string Filename on success.
+*/
+function download_url( $url ) {
+ //WARNING: The file is not automatically deleted, The script must unlink() the file.
+ if( ! $url )
+ return new WP_Error('http_no_url', __('Invalid URL Provided'));
+
+ $tmpfname = tempnam(get_temp_dir(), 'wpupdate');
+ if( ! $tmpfname )
+ return new WP_Error('http_no_file', __('Could not create Temporary file'));
+
+ $handle = @fopen($tmpfname, 'w');
+ if( ! $handle )
+ return new WP_Error('http_no_file', __('Could not create Temporary file'));
+
+ require_once( ABSPATH . 'wp-includes/class-snoopy.php' );
+ $snoopy = new Snoopy();
+ $snoopy->fetch($url);
+
+ if( $snoopy->status != '200' ){
+ fclose($handle);
+ unlink($tmpfname);
+ return new WP_Error('http_404', trim($snoopy->response_code));
+ }
+ fwrite($handle, $snoopy->results);
+ fclose($handle);
+
+ return $tmpfname;
+}
+
+function unzip_file($file, $to) {
+ global $wp_filesystem;
+
+ if ( ! $wp_filesystem || !is_object($wp_filesystem) )
+ return new WP_Error('fs_unavailable', __('Could not access filesystem.'));
+
+ $fs =& $wp_filesystem;
+
+ require_once(ABSPATH . 'wp-admin/includes/class-pclzip.php');
+
+ $archive = new PclZip($file);
+
+ // Is the archive valid?
+ if ( false == ($archive_files = $archive->extract(PCLZIP_OPT_EXTRACT_AS_STRING)) )
+ return new WP_Error('incompatible_archive', __('Incompatible archive'), $archive->errorInfo(true));
+
+ if ( 0 == count($archive_files) )
+ return new WP_Error('empty_archive', __('Empty archive'));
+
+ $to = trailingslashit($to);
+ $path = explode('/', $to);
+ $tmppath = '';
+ for ( $j = 0; $j < count($path) - 1; $j++ ) {
+ $tmppath .= $path[$j] . '/';
+ if ( ! $fs->is_dir($tmppath) )
+ $fs->mkdir($tmppath, 0755);
+ }
+
+ foreach ($archive_files as $file) {
+ $path = explode('/', $file['filename']);
+ $tmppath = '';
+
+ // Loop through each of the items and check that the folder exists.
+ for ( $j = 0; $j < count($path) - 1; $j++ ) {
+ $tmppath .= $path[$j] . '/';
+ if ( ! $fs->is_dir($to . $tmppath) )
+ if ( !$fs->mkdir($to . $tmppath, 0755) )
+ return new WP_Error('mkdir_failed', __('Could not create directory'));
+ }
+
+ // We've made sure the folders are there, so let's extract the file now:
+ if ( ! $file['folder'] )
+ if ( !$fs->put_contents( $to . $file['filename'], $file['content']) )
+ return new WP_Error('copy_failed', __('Could not copy file'));
+ $fs->chmod($to . $file['filename'], 0644);
+ }
+
+ return true;
+}
+
+function copy_dir($from, $to) {
+ global $wp_filesystem;
+
+ $dirlist = $wp_filesystem->dirlist($from);
+
+ $from = trailingslashit($from);
+ $to = trailingslashit($to);
+
+ foreach ( (array) $dirlist as $filename => $fileinfo ) {
+ if ( 'f' == $fileinfo['type'] ) {
+ if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true) )
+ return false;
+ $wp_filesystem->chmod($to . $filename, 0644);
+ } elseif ( 'd' == $fileinfo['type'] ) {
+ if ( !$wp_filesystem->mkdir($to . $filename, 0755) )
+ return false;
+ if ( !copy_dir($from . $filename, $to . $filename) )
+ return false;
+ }
+ }
+
+ return true;
+}
+
+function WP_Filesystem( $args = false, $preference = false ) {
+ global $wp_filesystem;
+
+ $method = get_filesystem_method($preference);
+ if ( ! $method )
+ return false;
+
+ require_once('class-wp-filesystem-'.$method.'.php');
+ $method = "WP_Filesystem_$method";
+
+ $wp_filesystem = new $method($args);
+
+ if ( $wp_filesystem->errors->get_error_code() )
+ return false;
+
+ if ( !$wp_filesystem->connect() )
+ return false; //There was an erorr connecting to the server.
+
+ return true;
+}
+
+function get_filesystem_method() {
+ $tempFile = tempnam(get_temp_dir(), 'WPU');
+
+ if ( getmyuid() == fileowner($tempFile) ) {
+ unlink($tempFile);
+ return 'direct';
+ } else {
+ unlink($tempFile);
+ }
+
+ if ( extension_loaded('ftp') ) return 'ftpext';
+ if ( extension_loaded('sockets') || function_exists('fsockopen') ) return 'ftpsockets'; //Sockets: Socket extension; PHP Mode: FSockopen / fwrite / fread
+ return false;
+}
+