private async Task <bool> InvokeLogoutEndpointAsync()
{
OpenIdConnectRequest request;
// Note: logout requests must be made via GET but POST requests
// are also accepted to allow flowing large logout payloads.
// See https://openid.net/specs/openid-connect-session-1_0.html#RPLogout
if (HttpMethods.IsGet(Request.Method))
{
request = new OpenIdConnectRequest(Request.Query);
}
else if (HttpMethods.IsPost(Request.Method))
{
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Logger.LogError("The logout request was rejected because " +
"the mandatory 'Content-Type' header was missing.");
return(await SendLogoutResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'Content-Type' header must be specified."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The logout request was rejected because an invalid 'Content-Type' " +
"header was specified: {ContentType}.", Request.ContentType);
return(await SendLogoutResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified 'Content-Type' header is not valid."
}));
}
request = new OpenIdConnectRequest(await Request.ReadFormAsync(Context.RequestAborted));
}
else
{
Logger.LogError("The logout request was rejected because an invalid " +
"HTTP method was specified: {Method}.", Request.Method);
return(await SendLogoutResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified HTTP method is not valid."
}));
}
// Note: set the message type before invoking the ExtractLogoutRequest event.
request.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.LogoutRequest);
// Store the logout request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
var @event = new ExtractLogoutRequestContext(Context, Scheme, Options, request);
await Provider.ExtractLogoutRequest(@event);
if (@event.Result != null)
{
if (@event.Result.Handled)
{
Logger.LogDebug("The logout request was handled in user code.");
return(true);
}
else if (@event.Result.Skipped)
{
Logger.LogDebug("The default logout request handling was skipped from user code.");
return(false);
}
}
else if (@event.IsRejected)
{
Logger.LogError("The logout request was rejected with the following error: {Error} ; {Description}",
/* Error: */ @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ @event.ErrorDescription);
return(await SendLogoutResponseAsync(new OpenIdConnectResponse
{
Error = @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = @event.ErrorDescription,
ErrorUri = @event.ErrorUri
}));
}
Logger.LogInformation("The logout request was successfully extracted " +
"from the HTTP request: {Request}.", request);
var context = new ValidateLogoutRequestContext(Context, Scheme, Options, request);
await Provider.ValidateLogoutRequest(context);
if (context.Result != null)
{
if (context.Result.Handled)
{
Logger.LogDebug("The logout request was handled in user code.");
return(true);
}
else if (context.Result.Skipped)
{
Logger.LogDebug("The default logout request handling was skipped from user code.");
return(false);
}
}
else if (context.IsRejected)
{
Logger.LogError("The logout request was rejected with the following error: {Error} ; {Description}",
/* Error: */ context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ context.ErrorDescription);
return(await SendLogoutResponseAsync(new OpenIdConnectResponse
{
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Store the validated post_logout_redirect_uri as a request property.
request.SetProperty(OpenIdConnectConstants.Properties.PostLogoutRedirectUri, context.PostLogoutRedirectUri);
Logger.LogInformation("The logout request was successfully validated.");
var notification = new HandleLogoutRequestContext(Context, Scheme, Options, request);
await Provider.HandleLogoutRequest(notification);
if (notification.Result != null)
{
if (notification.Result.Handled)
{
Logger.LogDebug("The logout request was handled in user code.");
return(true);
}
else if (notification.Result.Skipped)
{
Logger.LogDebug("The default logout request handling was skipped from user code.");
return(false);
}
}
else if (notification.IsRejected)
{
Logger.LogError("The logout request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ notification.ErrorDescription);
return(await SendLogoutResponseAsync(new OpenIdConnectResponse
{
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
return(false);
}
/// <summary> /// Represents an event called for each request to the logout endpoint /// to determine if the request is valid and should continue to be processed. /// </summary> /// <param name="context">The context instance associated with this event.</param> /// <returns>A <see cref="Task"/> that can be used to monitor the asynchronous operation.</returns> public virtual Task ValidateLogoutRequest(ValidateLogoutRequestContext context) => OnValidateLogoutRequest(context);