hello,
yes the file is there and the function code starts at line # 1086
function download_url( $url, $timeout = 300, $signature_verification = false ) {
// 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.' ) );
}
$url_filename = basename( parse_url( $url, PHP_URL_PATH ) );
$tmpfname = wp_tempnam( $url_filename );
if ( ! $tmpfname ) {
return new WP_Error( 'http_no_file', __( 'Could not create temporary file.' ) );
}
$response = wp_safe_remote_get(
$url,
array(
'timeout' => $timeout,
'stream' => true,
'filename' => $tmpfname,
)
);
if ( is_wp_error( $response ) ) {
unlink( $tmpfname );
return $response;
}
$response_code = wp_remote_retrieve_response_code( $response );
if ( 200 !== $response_code ) {
$data = array(
'code' => $response_code,
);
// Retrieve a sample of the response body for debugging purposes.
$tmpf = fopen( $tmpfname, 'rb' );
if ( $tmpf ) {
/**
* Filters the maximum error response body size in <code>download_url()</code>.
*
* @since 5.1.0
*
* @see download_url()
*
* @param int $size The maximum error response body size. Default 1 KB.
*/
$response_size = apply_filters( 'download_url_error_max_body_size', KB_IN_BYTES );
$data['body'] = fread( $tmpf, $response_size );
fclose( $tmpf );
}
unlink( $tmpfname );
return new WP_Error( 'http_404', trim( wp_remote_retrieve_response_message( $response ) ), $data );
}
$content_md5 = wp_remote_retrieve_header( $response, 'content-md5' );
if ( $content_md5 ) {
$md5_check = verify_file_md5( $tmpfname, $content_md5 );
if ( is_wp_error( $md5_check ) ) {
unlink( $tmpfname );
return $md5_check;
}
}
// If the caller expects signature verification to occur, check to see if this URL supports it.
if ( $signature_verification ) {
/**
* Filters the list of hosts which should have Signature Verification attempted on.
*
* @since 5.2.0
*
* @param string[] $hostnames List of hostnames.
*/
$signed_hostnames = apply_filters( 'wp_signature_hosts', array( 'www.remarpro.com', 'downloads.www.remarpro.com', 's.w.org' ) );
$signature_verification = in_array( parse_url( $url, PHP_URL_HOST ), $signed_hostnames, true );
}
// Perform signature valiation if supported.
if ( $signature_verification ) {
$signature = wp_remote_retrieve_header( $response, 'x-content-signature' );
if ( ! $signature ) {
// Retrieve signatures from a file if the header wasn't included.
// www.remarpro.com stores signatures at $package_url.sig.
$signature_url = false;
$url_path = parse_url( $url, PHP_URL_PATH );
if ( '.zip' === substr( $url_path, -4 ) || '.tar.gz' === substr( $url_path, -7 ) ) {
$signature_url = str_replace( $url_path, $url_path . '.sig', $url );
}
/**
* Filters the URL where the signature for a file is located.
*
* @since 5.2.0
*
* @param false|string $signature_url The URL where signatures can be found for a file, or false if none are known.
* @param string $url The URL being verified.
*/
$signature_url = apply_filters( 'wp_signature_url', $signature_url, $url );
if ( $signature_url ) {
$signature_request = wp_safe_remote_get(
$signature_url,
array(
'limit_response_size' => 10 * KB_IN_BYTES, // 10KB should be large enough for quite a few signatures.
)
);
if ( ! is_wp_error( $signature_request ) && 200 === wp_remote_retrieve_response_code( $signature_request ) ) {
$signature = explode( "\n", wp_remote_retrieve_body( $signature_request ) );
}
}
}
// Perform the checks.
$signature_verification = verify_file_signature( $tmpfname, $signature, basename( parse_url( $url, PHP_URL_PATH ) ) );
}
if ( is_wp_error( $signature_verification ) ) {
if (
/**
* Filters whether Signature Verification failures should be allowed to soft fail.
*
* WARNING: This may be removed from a future release.
*
* @since 5.2.0
*
* @param bool $signature_softfail If a softfail is allowed.
* @param string $url The url being accessed.
*/
apply_filters( 'wp_signature_softfail', true, $url )
) {
$signature_verification->add_data( $tmpfname, 'softfail-filename' );
} else {
// Hard-fail.
unlink( $tmpfname );
}
return $signature_verification;
}
return $tmpfname;
}
