Unhandled Exception: Cannot retrieve tile: HTTP 204

[zjyhll]

I can not load this
https://dev-tile.terraqt.com/tile/xyz/{z}/{x}/{y}.pbf?path=cfa08636-3d72-439c-a3be-de686f1ef9e1/cor101/202010/CN-511403/vectortiles

center LatLng(30.253362,103.879004)

maybe it load succeed，but not shown

E/flutter (11409): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: Cannot retrieve tile: HTTP 204: https://dev-tile.terraqt.com/tile/xyz/13/6639/3156.pbf
E/flutter (11409): #0 NetworkVectorTileProvider.provide (package:vector_map_tiles/src/vector_tile_provider.dart:56:7)
E/flutter (11409):
E/flutter (11409): #1 MemoryCacheVectorTileProvider.provide (package:vector_map_tiles/src/vector_tile_provider.dart:95:15)
E/flutter (11409):
E/flutter (11409): #2 VectorTileLoadingCache._loadBytes (package:vector_map_tiles/src/cache/vector_tile_loading_cache.dart:85:15)
E/flutter (11409):
E/flutter (11409): #3 VectorTileLoadingCache._loadTile (package:vector_map_tiles/src/cache/vector_tile_loading_cache.dart:65:15)
E/flutter (11409):
E/flutter (11409): #4 VectorTileLoadingCache.retrieve (package:vector_map_tiles/src/cache/vector_tile_loading_cache.dart:38:12)
E/flutter (11409):
E/flutter (11409): #5 CachesTileProvider.provide (package:vector_map_tiles/src/stream/caches_tile_provider.dart:30:35)
E/flutter (11409):
E/flutter (11409): #6 VectorTileModel.startLoading. (package:vector_map_tiles/src/grid/tile_model.dart)
E/flutter (11409):
E/flutter (11409):

[ibrierley]

A 204 error typically means that there was no content in the response from the http server. Clicking on the url shown, it doesn't seem to return any content, so first place I would look is why isn't the server returning any protobuf / .pbf content.

[zjyhll]

A 204 error typically means that there was no content in the response from the http server. Clicking on the url shown, it doesn't seem to return any content, so first place I would look is why isn't the server returning any protobuf / .pbf content.

https://dev-tile.terraqt.com/tile/xyz/12/3231/1681.pbf?path=8d3dc176-7f8a-4e08-a8c6-08e798deb999/eve1.e/20210517/1ba522c3-4612-4a28-bf78-454bcf67075c/vectortiles

Only some places have data，do I need to modify VectorTileLayerOptions‘s theme

[greensopinion]

modifying the theme likely won't help

I think what we need is something like this: https://github.com/greensopinion/flutter-vector-map-tiles/blob/main/lib/src/cache/vector_tile_loading_cache.dart#L67
Currently if we try to load a tile that's not present, we ignore it by creating an empty tile.

Feel free to submit a PR

[greensopinion]

fixed in commit 022580f