CORS problem when trying to load on the map a custom KML

[Giuseppe Riccardi]

Hello all,

from few days we noticed that we are unable to load in the map our custom KML.

We are facing always a cors error that we aren't able to explain.

This is our current Spring boot configuration:

@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http.securityMatcher("/**")
.cors((cors) -> cors.configurationSource(apiConfigurationSource()))
.csrf(CsrfConfigurer::disable);
return http.build();
}

CorsConfigurationSource apiConfigurationSource() {
CorsConfiguration configuration = new CorsConfiguration();
configuration.setAllowedOrigins(List.of("*"));
configuration.setAllowedMethods(Arrays.asList("GET", "POST", "HEAD", "OPTIONS"));
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/map/**", configuration);
return source;
}

And this is he configuration on the single endpoint that the map is trying to load:

@CrossOrigin(origins = "https://map.geo.admin.ch")
@GetMapping("/map/kml")
public void createKml(@RequestParam("id") String id, @RequestParam("distance") int distance, @RequestParam("lang") String lang, @RequestParam(name = "withDescription", required = false, defaultValue = "false") Boolean withDescription, @RequestParam(name = "showNames", required = false, defaultValue = "false") Boolean showNames, HttpServletRequest request, HttpServletResponse response) {
/** BODY **/
}

As MAP we are using this URL: https://map.geo.admin.ch/embed.html?center=2660000,1190000&zoom=12&topic=ech&lang=de&bgLayer=ch.swisstopo.swissimage&layers=

Do you have any idea why is not possible to load it? Has something changed on your side? 

Best regards,

Giuseppe Riccardi

[GeoAdminCh API]

Hi Giuseppe

Could you please provide us more details, such as a link to the KML you try to load?

Did you try importing it into map.geo.admin.ch directly, additionally to trying to import it into your own app?
Does that work?

Thanks a lot

Juergen