WP_HTTP_Proxy::send_through_proxy( string $uri ): bool

Source

public function send_through_proxy( $uri ) {
	$check = parse_url( $uri );

	// Malformed URL, can not process, but this could mean ssl, so let through anyway.
	if ( false === $check ) {
		return true;
	}

	$home = parse_url( get_option( 'siteurl' ) );

	/**
	 * Filters whether to preempt sending the request through the proxy.
	 *
	 * Returning false will bypass the proxy; returning true will send
	 * the request through the proxy. Returning null bypasses the filter.
	 *
	 * @since 3.5.0
	 *
	 * @param bool|null $override Whether to send the request through the proxy. Default null.
	 * @param string    $uri      URL of the request.
	 * @param array     $check    Associative array result of parsing the request URL with `parse_url()`.
	 * @param array     $home     Associative array result of parsing the site URL with `parse_url()`.
	 */
	$result = apply_filters( 'pre_http_send_through_proxy', null, $uri, $check, $home );
	if ( ! is_null( $result ) ) {
		return $result;
	}

	if ( 'localhost' === $check['host'] || ( isset( $home['host'] ) && $home['host'] === $check['host'] ) ) {
		return false;
	}

	if ( ! defined( 'WP_PROXY_BYPASS_HOSTS' ) ) {
		return true;
	}

	static $bypass_hosts   = null;
	static $wildcard_regex = array();
	if ( null === $bypass_hosts ) {
		$bypass_hosts = preg_split( '|,\s*|', WP_PROXY_BYPASS_HOSTS );

		if ( str_contains( WP_PROXY_BYPASS_HOSTS, '*' ) ) {
			$wildcard_regex = array();
			foreach ( $bypass_hosts as $host ) {
				$wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
			}
			$wildcard_regex = '/^(' . implode( '|', $wildcard_regex ) . ')$/i';
		}
	}

	if ( ! empty( $wildcard_regex ) ) {
		return ! preg_match( $wildcard_regex, $check['host'] );
	} else {
		return ! in_array( $check['host'], $bypass_hosts, true );
	}
}

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