Function resolveFilePath

packages/effect/src/unstable/http/HttpStaticServer.ts:377–398

(path: Path.Path, root: string, url: string)

}

const resolveFilePath = (path: Path.Path, root: string, url: string): string | undefined => {
  const urlPath = stripQueryString(url)
  let decodedPath: string
  try {
    decodedPath = decodeURIComponent(urlPath)
  } catch {
    return undefined
  }
  if (decodedPath.includes("\u0000")) {
    return undefined
  }
  const normalizedPath = path.normalize(decodedPath.startsWith("/") ? decodedPath.slice(1) : decodedPath)
  if (normalizedPath === ".." || normalizedPath.startsWith(`..${path.sep}`)) {
    return undefined
  }
  const resolvedPath = path.join(root, normalizedPath)
  const rootPrefix = root.endsWith(path.sep) ? root : `${root}${path.sep}`
  if (resolvedPath !== root && !resolvedPath.startsWith(rootPrefix)) {
    return undefined
  }
  return resolvedPath
}

const toRouteNotFoundError = (request: HttpServerRequest.HttpServerRequest) =>
  new HttpServerError.HttpServerError({ reason: new HttpServerError.RouteNotFound({ request }) })