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Asked: 2026-06-15T07:21:55+00:00

How are 404 redirects done in Dart using HTTP server? pseudo code: server.addRequestHandler(notFound, redirectTo(…));

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How are 404 redirects done in Dart using HTTP server?

pseudo code:

server.addRequestHandler(notFound, redirectTo(…));

Thanks in advance.

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1 Answer

  1. Editorial Team

    If you want to do an URL redirection, you can use :

    • a Refresh header :
    server.addRequestHandler(notFound, (HttpRequest request, HttpResponse response) {
  response.statusCode = HttpStatus.NOT_FOUND;
  response.headers.set("Refresh", "0; url=http://www.example.com/");
  response.outputStream.close();
});
    • a Meta refresh if you want to display some text before the redirection :
    server.addRequestHandler(notFound, (HttpRequest request, HttpResponse response) {
  response.statusCode = HttpStatus.NOT_FOUND;
  response.headers.set(HttpHeaders.CONTENT_TYPE, 'text/html');
  response.outputStream.writeString(
      '<!DOCTYPE html>'
      '<meta http-equiv="Refresh" content="5; url=\'http://example.com/\'">'
      'Page requested cannot be found. You will be redirected in few seconds...'
  );
  response.outputStream.close();
});
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