/// <summary>
/// Invokes middleware for each request
/// </summary>
public async Task Invoke(HttpRequest request, HttpResponse response, MiddlewareResultHandler setResult)
{
if (AllowCredentials)
{
response.AdditionalHeaders.Add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
}
if (!string.IsNullOrEmpty(AllowedOrigins))
{
if (AllowedOrigins == "*")
{
response.AdditionalHeaders.Add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN,
request.Headers.ContainsKey(HttpHeaders.ORIGIN)
? request.Headers[HttpHeaders.ORIGIN]
: "*");
}
else
{
response.AdditionalHeaders.Add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, AllowedOrigins);
}
}
if (request.Method.Equals(HttpHeaders.HTTP_OPTIONS, StringComparison.InvariantCultureIgnoreCase))
{
if (!string.IsNullOrEmpty(AllowedHeaders))
{
response.AdditionalHeaders.Add(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, AllowedHeaders);
}
if (!string.IsNullOrEmpty(AllowedMethods))
{
response.AdditionalHeaders.Add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, AllowedMethods);
}
if (!string.IsNullOrEmpty(AllowMaxAge))
{
response.AdditionalHeaders.Add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, AllowMaxAge);
}
setResult(StatusCodeResult.NoContent());
}
await Task.CompletedTask;
}
