/**
* Attempt to download a remote file attachment
*
* @param string $url URL of item to fetch
* @param array $post Attachment details
* @return array|WP_Error Local file location details on success, WP_Error otherwise
*/
function fetch_remote_file($url, $post)
{
// extract the file name and extension from the url
$file_name = basename($url);
// get placeholder file in the upload dir with a unique, sanitized filename
$upload = wp_upload_bits($file_name, 0, '', $post['upload_date']);
if ($upload['error']) {
return new WP_Error('upload_dir_error', $upload['error']);
}
// fetch the remote url and write it to the placeholder file
$wp_http = new WP_Http_Streams();
$http_response = $wp_http->request($url, array('filename' => $upload['file'], 'stream' => true, 'sslcertificates' => '', 'decompress' => false));
// request failed
if (is_wp_error($http_response)) {
@unlink($upload['file']);
return new WP_Error('import_file_error', __('Remote server did not respond', 'wordpress-importer'));
}
// make sure the fetch was successful
$response = $http_response['response'];
if ($response['code'] != '200') {
@unlink($upload['file']);
return new WP_Error('import_file_error', sprintf(__('Remote server returned error response %1$d %2$s', 'wordpress-importer'), esc_html($response['code']), get_status_header_desc($response['code'])));
}
$headers = $http_response['headers'];
$filesize = filesize($upload['file']);
if (isset($headers['content-length']) && $filesize != $headers['content-length']) {
@unlink($upload['file']);
return new WP_Error('import_file_error', __('Remote file is incorrect size', 'wordpress-importer'));
}
if (0 == $filesize) {
@unlink($upload['file']);
return new WP_Error('import_file_error', __('Zero size file downloaded', 'wordpress-importer'));
}
$max_size = (int) $this->max_attachment_size();
if (!empty($max_size) && $filesize > $max_size) {
@unlink($upload['file']);
return new WP_Error('import_file_error', sprintf(__('Remote file is too large, limit is %s', 'wordpress-importer'), size_format($max_size)));
}
// keep track of the old and new urls so we can substitute them later
$this->url_remap[$url] = $upload['url'];
$this->url_remap[$post['guid']] = $upload['url'];
// r13735, really needed?
// keep track of the destination if the remote url is redirected somewhere else
if (isset($headers['x-final-location']) && $headers['x-final-location'] != $url) {
$this->url_remap[$headers['x-final-location']] = $upload['url'];
}
return $upload;
}
