Chris Arderne
81 lines
2.2 KiB
TypeScript
81 lines
2.2 KiB
TypeScript
const DEFAULT_REDIRECT = "/";
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// Pathnames that are NOT user-navigable destinations: fetcher endpoints,
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// OAuth/auth callbacks, JSON APIs, the magic-link redemption route, and the
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// auth flow routes themselves (which would create a redirect loop). Note
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// `/admin/api/` covers admin JSON endpoints while leaving `/admin`,
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// `/admin/back-office/*`, `/admin/orgs`, etc. navigable.
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const NON_NAVIGABLE_PREFIXES = ["/resources/", "/auth/", "/admin/api/", "/api/", "/engine/"];
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const NON_NAVIGABLE_EXACT = new Set([
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"/magic",
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"/logout",
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"/login",
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"/login/magic",
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"/login/mfa",
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"/login/sso",
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]);
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function isNavigablePath(pathname: string): boolean {
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if (NON_NAVIGABLE_EXACT.has(pathname)) return false;
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return !NON_NAVIGABLE_PREFIXES.some((prefix) => pathname.startsWith(prefix));
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}
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/**
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* This should be used any time the redirect path is user-provided
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* (Like the query string on our login/signup pages). This avoids
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* open-redirect vulnerabilities and prevents redirecting users to
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* non-page routes (e.g. fetcher endpoints) that would render blank.
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* @param {string} path The redirect destination
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* @param {string} defaultRedirect The redirect to use if the to is unsafe.
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*/
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export function sanitizeRedirectPath(
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path: string | undefined | null,
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defaultRedirect: string = DEFAULT_REDIRECT
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): string {
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if (!path || typeof path !== "string") {
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return defaultRedirect;
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}
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if (!path.startsWith("/") || path.startsWith("//")) {
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return defaultRedirect;
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}
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try {
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// should not parse as a full URL
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new URL(path);
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return defaultRedirect;
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} catch {}
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let parsed: URL;
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try {
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// ensure it's a valid relative path
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parsed = new URL(path, "https://example.com");
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if (parsed.hostname !== "example.com") {
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return defaultRedirect;
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}
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} catch {
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return defaultRedirect;
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}
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if (!isNavigablePath(parsed.pathname)) {
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return defaultRedirect;
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}
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return path;
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}
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export function titleCase(original: string): string {
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return original
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.split(" ")
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.map((word) => word[0].toUpperCase() + word.slice(1))
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.join(" ");
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}
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export function appEnvTitleTag(appEnv?: string): string {
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if (!appEnv || appEnv === "production") {
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return "";
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}
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return ` (${appEnv})`;
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}
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