Function rewriteLocalhostURL

site/src/utils/portForward.ts:62–91

(
	url: string,
	proxyHost: string,
	agentName: string,
	workspaceName: string,
	username: string,
)

 * localhost address or when parsing fails.
 */
export const rewriteLocalhostURL = (
	url: string,
	proxyHost: string,
	agentName: string,
	workspaceName: string,
	username: string,
): string => {
	try {
		const parsed = new URL(url);
		if (!localHosts.has(parsed.hostname)) {
			return url;
		}
		const protocol = parsed.protocol.replace(
			":",
			"",
		) as WorkspaceAgentPortShareProtocol;
		return portForwardURL(
			proxyHost,
			resolveLocalhostPort(parsed.port, parsed.protocol),
			agentName,
			workspaceName,
			username,
			protocol,
			parsed.pathname,
			parsed.search,
		);
	} catch {
		return url;
	}
};

// openMaybePortForwardedURL tries to open the provided URI through the
// port-forwarded URL if it is localhost, otherwise opens it normally.