public static IServiceCollection AddCorsPolicy(
this IServiceCollection services,
string corsPolicy, string apiUrl)
{
var allowedOrigins = CorsHelper.GetAllowedOrigins(apiUrl);
if (allowedOrigins != null)
{
services.AddCors(x => x.AddPolicy(corsPolicy,
builder =>
builder.WithOrigins(allowedOrigins).AllowAnyHeader().AllowAnyMethod()));
}
services.AddTransient <ICorsPolicyAccessor, CorsPolicyAccessor>();
return(services);
}
public async Task InvokeAsync(HttpContext context, ICorsPolicyAccessor accessor
)
{
var policy = accessor.GetPolicy(_policyName);
string[] origins = CorsHelper.GetAllowedOrigins(_apiUrl);
if (origins?.Length > 0)
{
var policyOrigins = policy.Origins;
var newOrigins = origins.Except(policyOrigins);
foreach (var origin in newOrigins)
{
policy.Origins.Add(origin);
}
}
await _next(context);
}