protected async override Task <IValueProvider> BuildAsync(WebPubSubContextAttribute attrResolved, IReadOnlyDictionary <string, object> bindingData)
{
if (bindingData == null)
{
throw new ArgumentNullException(nameof(bindingData));
}
bindingData.TryGetValue(HttpRequestName, out var httpRequest);
var request = httpRequest as HttpRequest;
var httpContext = request?.HttpContext;
if (httpContext == null)
{
return(new WebPubSubContextValueProvider(new WebPubSubContext($"HttpContext is null.", WebPubSubErrorCode.UserError), _userType));
}
try
{
// fallback to use global settings.
var validationOptions = attrResolved.Connections != null ?
new WebPubSubValidationOptions(attrResolved.Connections) :
new WebPubSubValidationOptions(_options.ConnectionString);
var serviceRequest = await request.ReadWebPubSubRequestAsync(validationOptions).ConfigureAwait(false);
switch (serviceRequest)
{
case PreflightRequest validationRequest:
{
var response = new HttpResponseMessage();
if (validationRequest.IsValid)
{
response.Headers.Add(Constants.Headers.WebHookAllowedOrigin, Constants.AllowedAllOrigins);
}
else
{
response.StatusCode = HttpStatusCode.BadRequest;
}
var abuseRequest = new WebPubSubContext(validationRequest, response);
return(new WebPubSubContextValueProvider(abuseRequest, _userType));
}
case ConnectEventRequest:
case UserEventRequest:
case ConnectedEventRequest:
case DisconnectedEventRequest:
default:
return(new WebPubSubContextValueProvider(new WebPubSubContext(serviceRequest), _userType));
}
}
catch (UnauthorizedAccessException unauthorized)
{
return(new WebPubSubContextValueProvider(new WebPubSubContext(unauthorized.Message, WebPubSubErrorCode.Unauthorized), _userType));
}
catch (Exception ex)
{
return(new WebPubSubContextValueProvider(new WebPubSubContext(ex.Message, WebPubSubErrorCode.UserError), _userType));
}
}
public WebPubSubContextValueProvider(WebPubSubContext request, Type type)
{
_request = request;
Type = type;
}