protected override async Task HandleSignOutAsync(SignOutContext context)
{
// request may be null when no logout request has been received
// or has been already handled by InvokeLogoutEndpointAsync.
var request = Context.GetOpenIdConnectRequest();
if (request == null)
{
return;
}
// Stop processing the request if there's no signout context that matches
// the authentication type associated with this middleware instance
// or if the response status code doesn't indicate a successful response.
if (context == null || Response.StatusCode != 200)
{
return;
}
// post_logout_redirect_uri is added to the response message since it can be
// set or replaced from the ValidateClientLogoutRedirectUri event.
var response = new OpenIdConnectMessage {
PostLogoutRedirectUri = request.PostLogoutRedirectUri,
State = request.State
};
var notification = new ApplyLogoutResponseContext(Context, Options, request, response);
await Options.Provider.ApplyLogoutResponse(notification);
if (notification.HandledResponse)
{
return;
}
else if (notification.Skipped)
{
return;
}
// Stop processing the request if no explicit
// post_logout_redirect_uri has been provided.
if (string.IsNullOrEmpty(response.PostLogoutRedirectUri))
{
return;
}
var location = response.PostLogoutRedirectUri;
foreach (var parameter in response.Parameters)
{
// Don't include post_logout_redirect_uri in the query string.
if (string.Equals(parameter.Key, OpenIdConnectParameterNames.PostLogoutRedirectUri, StringComparison.Ordinal))
{
continue;
}
location = QueryHelpers.AddQueryString(location, parameter.Key, parameter.Value);
}
Response.Redirect(location);
}
private async Task <bool> SendLogoutResponseAsync(OpenIdConnectResponse response)
{
var request = Context.GetOpenIdConnectRequest();
Context.SetOpenIdConnectResponse(response);
response.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.LogoutResponse);
// Note: as this stage, the request may be null (e.g if it couldn't be extracted from the HTTP request).
var notification = new ApplyLogoutResponseContext(Context, Scheme, Options, request, response)
{
PostLogoutRedirectUri = request?.GetProperty <string>(OpenIdConnectConstants.Properties.PostLogoutRedirectUri)
};
await Provider.ApplyLogoutResponse(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);
}
}
if (!string.IsNullOrEmpty(response.Error))
{
// Apply a 400 status code by default.
Response.StatusCode = 400;
if (Options.ApplicationCanDisplayErrors)
{
// Return false to allow the rest of
// the pipeline to handle the request.
return(false);
}
Logger.LogInformation("The logout response was successfully returned " +
"as a plain-text document: {Response}.", response);
return(await SendNativePageAsync(response));
}
// Don't redirect the user agent if no explicit post_logout_redirect_uri was
// provided or if the URI was not fully validated by the application code.
if (string.IsNullOrEmpty(notification.PostLogoutRedirectUri))
{
Logger.LogInformation("The logout response was successfully returned: {Response}.", response);
return(true);
}
// At this stage, throw an exception if the request was not properly extracted,
if (request == null)
{
throw new InvalidOperationException("The logout response cannot be returned.");
}
// Attach the request state to the end session response.
if (string.IsNullOrEmpty(response.State))
{
response.State = request.State;
}
// Create a new parameters dictionary holding the name/value pairs.
var parameters = new Dictionary <string, string>();
foreach (var parameter in response.GetParameters())
{
// Ignore null or empty parameters, including JSON
// objects that can't be represented as strings.
var value = (string)parameter.Value;
if (string.IsNullOrEmpty(value))
{
continue;
}
parameters.Add(parameter.Key, value);
}
Logger.LogInformation("The logout response was successfully returned to '{PostLogoutRedirectUri}': {Response}.",
notification.PostLogoutRedirectUri, response);
var location = QueryHelpers.AddQueryString(notification.PostLogoutRedirectUri, parameters);
Response.Redirect(location);
return(true);
}
/// <summary> /// Called before the LogoutEndpoint endpoint redirects its response to the caller. /// If the web application wishes to produce the authorization response directly in the LogoutEndpoint call it may write to the /// context.Response directly and should call context.RequestCompleted to stop other handlers from executing. /// This call may also be used to add additional response parameters to the authorization response. /// </summary> /// <param name="context">The context of the event carries information in and results out.</param> /// <returns>Task to enable asynchronous execution</returns> public virtual Task ApplyLogoutResponse(ApplyLogoutResponseContext context) => OnApplyLogoutResponse(context);
private async Task <bool> SendLogoutResponseAsync(OpenIdConnectResponse response)
{
var request = Context.GetOpenIdConnectRequest();
if (request == null)
{
request = new OpenIdConnectRequest();
}
Context.SetOpenIdConnectResponse(response);
var notification = new ApplyLogoutResponseContext(Context, Options, request, response);
await Options.Provider.ApplyLogoutResponse(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
if (!string.IsNullOrEmpty(response.Error))
{
// Apply a 400 status code by default.
Response.StatusCode = 400;
if (Options.ApplicationCanDisplayErrors)
{
// Return false to allow the rest of
// the pipeline to handle the request.
return(false);
}
return(await SendNativePageAsync(response));
}
// Don't redirect the user agent if no explicit post_logout_redirect_uri was
// provided or if the URI was not fully validated by the application code.
if (string.IsNullOrEmpty(response.PostLogoutRedirectUri))
{
return(true);
}
// Create a new parameters dictionary holding the name/value pairs.
var parameters = new Dictionary <string, string>();
foreach (var parameter in response.GetParameters())
{
// Don't include post_logout_redirect_uri in the parameters dictionary.
if (string.Equals(parameter.Key, OpenIdConnectConstants.Parameters.PostLogoutRedirectUri, StringComparison.Ordinal))
{
continue;
}
var value = parameter.Value as JValue;
if (value == null)
{
Logger.LogWarning("A parameter whose type was incompatible was ignored and excluded " +
"from the logout response: '{Parameter}'.", parameter.Key);
continue;
}
parameters.Add(parameter.Key, (string)value);
}
var location = QueryHelpers.AddQueryString(response.PostLogoutRedirectUri, parameters);
Response.Redirect(location);
return(true);
}
private async Task <bool> SendLogoutResponseAsync(OpenIdConnectMessage request, OpenIdConnectMessage response)
{
if (request == null)
{
request = new OpenIdConnectMessage();
}
var notification = new ApplyLogoutResponseContext(Context, Options, request, response);
await Options.Provider.ApplyLogoutResponse(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
if (!string.IsNullOrEmpty(response.Error))
{
// When returning an error, remove the authorization request from the OWIN context
// to inform TeardownCoreAsync that there's nothing more to handle.
Context.SetOpenIdConnectRequest(request: null);
// Apply a 400 status code by default.
Response.StatusCode = 400;
if (Options.ApplicationCanDisplayErrors)
{
Context.SetOpenIdConnectResponse(response);
// Return false to allow the rest of
// the pipeline to handle the request.
return(false);
}
return(await SendNativePageAsync(response));
}
// Don't redirect the user agent if no explicit post_logout_redirect_uri was
// provided or if the URI was not fully validated by the application code.
if (string.IsNullOrEmpty(response.PostLogoutRedirectUri))
{
return(true);
}
var location = response.PostLogoutRedirectUri;
foreach (var parameter in response.Parameters)
{
// Don't include post_logout_redirect_uri in the query string.
if (string.Equals(parameter.Key, OpenIdConnectParameterNames.PostLogoutRedirectUri, StringComparison.Ordinal))
{
continue;
}
location = QueryHelpers.AddQueryString(location, parameter.Key, parameter.Value);
}
Response.Redirect(location);
return(true);
}
private async Task <bool> SendLogoutResponseAsync(OpenIdConnectResponse response)
{
var request = Context.GetOpenIdConnectRequest();
Context.SetOpenIdConnectResponse(response);
response.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.LogoutResponse);
// Note: as this stage, the request may be null (e.g if it couldn't be extracted from the HTTP request).
var notification = new ApplyLogoutResponseContext(Context, Scheme, Options, request, response)
{
PostLogoutRedirectUri = request?.GetProperty <string>(OpenIdConnectConstants.Properties.PostLogoutRedirectUri)
};
await Provider.ApplyLogoutResponse(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);
}
}
if (!string.IsNullOrEmpty(response.Error))
{
// Apply a 400 status code by default.
Response.StatusCode = 400;
if (Options.ApplicationCanDisplayErrors)
{
// Return false to allow the rest of
// the pipeline to handle the request.
return(false);
}
Logger.LogInformation("The logout response was successfully returned " +
"as a plain-text document: {Response}.", response);
return(await SendNativePageAsync(response));
}
// Don't redirect the user agent if no explicit post_logout_redirect_uri was
// provided or if the URI was not fully validated by the application code.
if (string.IsNullOrEmpty(notification.PostLogoutRedirectUri))
{
Logger.LogInformation("The logout response was successfully returned: {Response}.", response);
return(true);
}
// At this stage, throw an exception if the request was not properly extracted,
if (request == null)
{
throw new InvalidOperationException("The logout response cannot be returned.");
}
// Attach the request state to the end session response.
if (string.IsNullOrEmpty(response.State))
{
response.State = request.State;
}
// Note: a dictionary is deliberately not used here to allow multiple parameters with the
// same name to be specified. While initially not allowed by the core OAuth2 specification,
// this is now accepted by derived drafts like the OAuth2 token exchange specification.
// For consistency, multiple parameters with the same name are also supported by this endpoint.
var parameters = new List <KeyValuePair <string, string> >();
foreach (var parameter in response.GetParameters())
{
var values = (string[])parameter.Value;
if (values == null)
{
continue;
}
foreach (var value in values)
{
parameters.Add(new KeyValuePair <string, string>(parameter.Key, value));
}
}
Logger.LogInformation("The logout response was successfully returned to '{PostLogoutRedirectUri}': {Response}.",
notification.PostLogoutRedirectUri, response);
var location = notification.PostLogoutRedirectUri;
foreach (var parameter in parameters)
{
location = QueryHelpers.AddQueryString(location, parameter.Key, parameter.Value);
}
Response.Redirect(location);
return(true);
}
private async Task <bool> SendLogoutResponseAsync(OpenIdConnectResponse response)
{
var request = Context.GetOpenIdConnectRequest();
Context.SetOpenIdConnectResponse(response);
response.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.LogoutResponse);
var notification = new ApplyLogoutResponseContext(Context, Options, request, response);
await Options.Provider.ApplyLogoutResponse(notification);
if (notification.HandledResponse)
{
Logger.LogDebug("The logout request was handled in user code.");
return(true);
}
else if (notification.Skipped)
{
Logger.LogDebug("The default logout request handling was skipped from user code.");
return(false);
}
if (!string.IsNullOrEmpty(response.Error))
{
// Apply a 400 status code by default.
Response.StatusCode = 400;
if (Options.ApplicationCanDisplayErrors)
{
// Return false to allow the rest of
// the pipeline to handle the request.
return(false);
}
Logger.LogInformation("The logout response was successfully returned " +
"as a plain-text document: {Response}", response);
return(await SendNativePageAsync(response));
}
Logger.LogInformation("The logout response was successfully returned: {Response}", response);
// Don't redirect the user agent if no explicit post_logout_redirect_uri was
// provided or if the URI was not fully validated by the application code.
if (string.IsNullOrEmpty(response.PostLogoutRedirectUri))
{
return(true);
}
// Create a new parameters dictionary holding the name/value pairs.
var parameters = new Dictionary <string, string>();
foreach (var parameter in response.GetParameters())
{
// Don't include post_logout_redirect_uri in the parameters dictionary.
if (string.Equals(parameter.Key, OpenIdConnectConstants.Parameters.PostLogoutRedirectUri, StringComparison.Ordinal))
{
continue;
}
// Ignore null or empty parameters, including JSON
// objects that can't be represented as strings.
var value = (string)parameter.Value;
if (string.IsNullOrEmpty(value))
{
continue;
}
parameters.Add(parameter.Key, value);
}
var location = QueryHelpers.AddQueryString(response.PostLogoutRedirectUri, parameters);
Response.Redirect(location);
return(true);
}