Can't load TileLayer from local files

[Rzezimioszek]

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Describe the bug

Only option to load TileLayer Raster local is to setup python local server for example to http://localhost:8000/{z}/{x}/{y}.jpg, but this solution doesn't work at web mode (view=ft.AppView.WEB_BROWSER) app and on deployed code on github pages.

Code sample

Code

import random
import flet as ft
import flet.map as map


def main(page: ft.Page):
    marker_layer_ref = ft.Ref[map.MarkerLayer]()
    circle_layer_ref = ft.Ref[map.CircleLayer]()

    def handle_tap(e: map.MapTapEvent):
        print(e)
        if e.name == "tap":
            marker_layer_ref.current.markers.append(
                map.Marker(
                    content=ft.Icon(
                        ft.Icons.LOCATION_ON, color=ft.cupertino_colors.DESTRUCTIVE_RED
                    ),
                    coordinates=e.coordinates,
                )
            )
        elif e.name == "secondary_tap":
            circle_layer_ref.current.circles.append(
                map.CircleMarker(
                    radius=random.randint(5, 10),
                    coordinates=e.coordinates,
                    color=ft.Colors.random_color(),
                    border_color=ft.Colors.random_color(),
                    border_stroke_width=4,
                )
            )
        page.update()

    def handle_event(e: map.MapEvent):
        print(e)

    page.add(
        ft.Text("Click anywhere to add a Marker, right-click to add a CircleMarker."),
        map.Map(
            expand=True,
            initial_center=map.MapLatitudeLongitude(50.965125,18.286120),
            initial_zoom=14,
            interaction_configuration=map.MapInteractionConfiguration(
                flags=map.MapInteractiveFlag.ALL
            ),
            on_init=lambda e: print(f"Initialized Map"),
            on_tap=handle_tap,
            on_secondary_tap=handle_tap,
            on_long_press=handle_tap,
            on_event=lambda e: print(e),
            layers=[
                map.TileLayer(
                    url_template="./{z}/{x}/{y}.jpg",
                    # url_template="http://localhost:8000/{z}/{x}/{y}.jpg",
                    # url_template="https://tile.openstreetmap.org/{z}/{x}/{y}.png",
                    on_image_error=lambda e: print("TileLayer Error"),
                ),
                map.RichAttribution(
                    attributions=[
                        map.TextSourceAttribution(
                            text="OpenStreetMap Contributors",
                            on_click=lambda e: e.page.launch_url(
                                "https://openstreetmap.org/copyright"
                            ),
                        ),
                        map.TextSourceAttribution(
                            text="Flet",
                            on_click=lambda e: e.page.launch_url("https://flet.dev"),
                        ),
                    ]
                ),
                map.SimpleAttribution(
                    text="Flet",
                    alignment=ft.alignment.top_right,
                    on_click=lambda e: print("Clicked SimpleAttribution"),
                ),
                map.MarkerLayer(
                    ref=marker_layer_ref,
                    markers=[
                        map.Marker(
                            content=ft.Icon(ft.Icons.LOCATION_ON),
                            coordinates=map.MapLatitudeLongitude(30, 15),
                        ),
                        map.Marker(
                            content=ft.Icon(ft.Icons.LOCATION_ON),
                            coordinates=map.MapLatitudeLongitude(10, 10),
                        ),
                        map.Marker(
                            content=ft.Icon(ft.Icons.LOCATION_ON),
                            coordinates=map.MapLatitudeLongitude(25, 45),
                        ),
                    ],
                ),
                map.CircleLayer(
                    ref=circle_layer_ref,
                    circles=[
                        map.CircleMarker(
                            radius=10,
                            coordinates=map.MapLatitudeLongitude(50.965125,18.286120),
                            color=ft.Colors.RED,
                            border_color=ft.Colors.BLUE,
                            border_stroke_width=4,
                        ),
                    ],
                ),
                map.PolygonLayer(
                    polygons=[
                        map.PolygonMarker(
                            label="Popular Touristic Area",
                            label_text_style=ft.TextStyle(
                                color=ft.Colors.BLACK,
                                size=15,
                                weight=ft.FontWeight.BOLD,
                            ),
                            color=ft.Colors.with_opacity(0.3, ft.Colors.BLUE),
                            coordinates=[
                                map.MapLatitudeLongitude(10, 10),
                                map.MapLatitudeLongitude(30, 15),
                                map.MapLatitudeLongitude(25, 45),
                            ],
                        ),
                    ],
                ),
                map.PolylineLayer(
                    polylines=[
                        map.PolylineMarker(
                            border_stroke_width=3,
                            border_color=ft.Colors.RED,
                            gradient_colors=[ft.Colors.BLACK, ft.Colors.BLACK],
                            color=ft.Colors.with_opacity(0.6, ft.Colors.GREEN),
                            coordinates=[
                                map.MapLatitudeLongitude(10, 10),
                                map.MapLatitudeLongitude(30, 15),
                                map.MapLatitudeLongitude(25, 45),
                            ],
                        ),
                    ],
                ),
            ],
        ),
    )

    page.theme_mode = ft.ThemeMode.LIGHT


ft.app(main, view=ft.AppView.WEB_BROWSER)
# ft.app(main, assets_dir="orto")

To reproduce

To reproduce step 1. load tiles from local dirs.

Expected behavior

No response

Screenshots / Videos

Captures

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Operating System

Windows

Operating system details

Windows 11

Flet version

0.25.0

Regression

Yes, it used to work in a previous Flet version (please specify the version in additional details)

Suggestions

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Logs

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Additional details

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