Test urlTemplate before loading map

[RedHappyLlama]

Hi,

Can anyone suggest a good way to test the map url, before loading a map? I recently got caught out by the OpenStreetMap User-Agent requirement with some very old code (see below). I was testing the basic map url in this old code, before loading the map, but even after the OpenStreetMap User-Agent requirement change, I was obviously still getting the 200 status code, but the map would fail to load.

http.Response response = await http.get(Uri.parse('https://tile.openstreetmap.org)).timeout(const Duration(seconds: 2), onTimeout: () { return http.Response('Error', 408);

I have tried to replicate the call I believe flutter_map makes to retrieve a tile picture, see code below. However even without the User-Agent specified in the headers, I still get a 200 status code. Would be good to exactly replicate the call flutter_map makes as the test, before loading the map or using an alternative url if there's an error. I'll obviously include User-Agent within the test and actual TileLayer, but I want to be able to run this test in case there's any other issues.

Response dioResponse = await dio .getUri<Uint8List>( Uri.parse('https://tile.openstreetmap.org/16/32305/21803.png'), options: Options(responseType: ResponseType.bytes), ) .timeout(const Duration(seconds: 2), onTimeout: () { return Response(statusMessage: 'Error', statusCode: 408, requestOptions: RequestOptions()); });

Any help would be greatly appreciated!! Thanks.