/// <summary>
/// Processes a request.
/// </summary>
/// <param name="context">The context in which the request to process is running.</param>
/// <param name="evaluatorCallback">A callback to a custom request evaluator.</param>
public void Process(HttpContextBase context, RequestEvaluatorCallback evaluatorCallback)
{
Logger.Log("Begin request processing.");
RequestSecurity expectedSecurity = EvaluateRequestViaCallbackOrEvaluator(context, evaluatorCallback);
if (expectedSecurity == RequestSecurity.Ignore)
{
// No redirect is needed for a result of Ignore.
EnrichResponse(context, _settings);
Logger.Log("Expected security is Ignore; done.", Logger.LogLevel.Info);
return;
}
string targetUrl = DetermineTargetUrl(context, expectedSecurity);
if (string.IsNullOrEmpty(targetUrl))
{
// No redirect is needed for a null/empty target URL.
EnrichResponse(context, _settings);
Logger.Log("No target URI determined; done.", Logger.LogLevel.Info);
return;
}
Redirect(context, targetUrl);
}
/// <summary>
/// Processes a request.
/// </summary>
/// <param name="context">The context in which the request to process is running.</param>
/// <param name="evaluatorCallback">A callback to a custom request evaluator.</param>
public void Process(HttpContextBase context, RequestEvaluatorCallback evaluatorCallback)
{
Logger.Log("Begin request processing.");
RequestSecurity expectedSecurity = EvaluateRequestViaCallbackOrEvaluator(context, evaluatorCallback);
if (expectedSecurity == RequestSecurity.Ignore) {
// No redirect is needed for a result of Ignore.
EnrichResponse(context, _settings);
Logger.Log("Expected security is Ignore; done.", Logger.LogLevel.Info);
return;
}
string targetUrl = DetermineTargetUrl(context, expectedSecurity);
if (string.IsNullOrEmpty(targetUrl)) {
// No redirect is needed for a null/empty target URL.
EnrichResponse(context, _settings);
Logger.Log("No target URI determined; done.", Logger.LogLevel.Info);
return;
}
Redirect(context, targetUrl);
}
/// <summary>
/// Evaluates this request via any request evaluator callback or an IRequestEvaluator.
/// </summary>
/// <param name="context"></param>
/// <param name="evaluatorCallback">A callback to a custom request evaluator.</param>
/// <returns></returns>
private RequestSecurity EvaluateRequestViaCallbackOrEvaluator(HttpContextBase context, RequestEvaluatorCallback evaluatorCallback)
{
RequestSecurity?evaluatorSecurity = null;
if (evaluatorCallback != null)
{
evaluatorSecurity = evaluatorCallback(context);
}
RequestSecurity expectedSecurity;
if (evaluatorSecurity.HasValue)
{
// Use the value returned by the EvaluateRequest event.
Logger.Log("Using the expected security value provided by the RequestEvaluatorCallback.", Logger.LogLevel.Info);
expectedSecurity = evaluatorSecurity.Value;
}
else
{
// Evaluate this request with the configured settings, if necessary.
IRequestEvaluator requestEvaluator = RequestEvaluatorFactory.Instance.Create(context);
expectedSecurity = requestEvaluator.Evaluate(context.Request, _settings);
}
return(expectedSecurity);
}
/// <summary>
/// Evaluates this request via any request evaluator callback or an IRequestEvaluator.
/// </summary>
/// <param name="context"></param>
/// <param name="evaluatorCallback">A callback to a custom request evaluator.</param>
/// <returns></returns>
private RequestSecurity EvaluateRequestViaCallbackOrEvaluator(HttpContextBase context, RequestEvaluatorCallback evaluatorCallback)
{
RequestSecurity? evaluatorSecurity = null;
if (evaluatorCallback != null) {
evaluatorSecurity = evaluatorCallback(context);
}
RequestSecurity expectedSecurity;
if (evaluatorSecurity.HasValue) {
// Use the value returned by the EvaluateRequest event.
Logger.Log("Using the expected security value provided by the RequestEvaluatorCallback.", Logger.LogLevel.Info);
expectedSecurity = evaluatorSecurity.Value;
} else {
// Evaluate this request with the configured settings, if necessary.
IRequestEvaluator requestEvaluator = RequestEvaluatorFactory.Instance.Create(context);
expectedSecurity = requestEvaluator.Evaluate(context.Request, _settings);
}
return expectedSecurity;
}