OSM not loading in Android

[andrey-serdyuk]

Hey. My native(Kotlin) Android app doesn't loads OSM tiles. I'm receiving Bad request logs when I'm trying to load it. All other tiles like Google and Bing are working fine but, OSM is not.

Here is my extention of HTTPTileDataSource

class MapTileDataSource(model: MapTile) : HTTPTileDataSource(1, 19, model.tile.replace("[lc]", AppSettings.locale)) {
    init {
        subdomains = model.vectors
    }
}

my map tile based on PersistentCacheTileDataSource class MapTileCache(model: MapTile) : PersistentCacheTileDataSource(MapTileDataSource(model), "cached_${model.value}_${AppSettings.locale}_tile.db")

TileModel

enum class MapTileDemo(val value: String) {
    Google("tile_google"),
    GoogleHyb("tile_google_hyb"),
    Osm("tile_osm"),
    Bing("tile_bing"),
    BingSat("tile_bing_sat"),
    BingHyb("tile_bing_hyb");

    private val subDomains
        get() = when (this) {
            Osm -> arrayOf("a", "b", "c")
            else -> arrayOf("0", "1", "2", "3")
        }

    val vectors
        get() = StringVector(subDomains.size.toLong()).apply {
            subDomains.forEach { add(it) }
        }

    val tile
        get() = when (this) {
            Google -> "https://mt{s}.google.com/vt/lyrs=m@167000000&hl=[lc]&x={x}&y={y}&z={zoom}"
            GoogleHyb -> "https://mt{s}.google.com/vt/lyrs=y@167000000&hl=[lc]&x={x}&y={y}&z={zoom}"
            Osm -> "https://{s}.tile.openstreetmap.org/{zoom}/{x}/{y}.png"
            Bing -> "https://ecn.t{s}.tiles.virtualearth.net/tiles/r{quadkey}.jpeg?g=733&mkt=en-US"
            BingSat -> "https://ecn.t{s}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=733&mkt=en-US"
            BingHyb -> "https://ecn.t{s}.tiles.virtualearth.net/tiles/h{quadkey}.jpeg?g=733&mkt=en-US"
        }
}

MapTileDataSource receives a MapTile instance and passes his tile property value as URL to HTTPTileDataSource.

Generated links are loading tiles when I open them in a browser but they don't loading up in the app. Here are some logs:

carto-mobile-sdk: HTTPClient::makeRequest: Bad status code: 403, URL: https://c.tile.openstreetmap.org/9/305/205.png carto-mobile-sdk: HTTPTileDataSource::loadTile: Failed to load https://c.tile.openstreetmap.org/9/305/205.png

Thanks for a help in advance.

[andrey-serdyuk]

class MapTileDataSource(model: MapTile) : HTTPTileDataSource(1, 19, model.tile.replace("[lc]", AppSettings.locale)) {
    init {
        subdomains = model.vectors
        httpHeaders = StringMap().apply {
            set("User-Agent", "PostmanRuntime/7.30.0")
            set("Accept", "*/*")
            set("Cache-Control", "no-cache")
            set("Accept-Encoding", "gzip, deflate, br")
            set("Connection", "keep-alive")
        }
    }
}

Http User-Agent has solved the issue.