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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Plugins.Essentials.Auth.Auth0
* File: LogoutEndpoint.cs
*
* LogoutEndpoint.cs is part of VNLib.Plugins.Essentials.Auth.Auth0 which is
* part of the larger VNLib collection of libraries and utilities.
*
* VNLib.Plugins.Essentials.Auth.Auth0 is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* VNLib.Plugins.Essentials.Auth.Auth0 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System.Net;
using System.Text.Json;
using System.Text.Json.Serialization;
using VNLib.Utils.IO;
using VNLib.Plugins.Extensions.Loading;
using VNLib.Plugins.Essentials.Accounts;
using VNLib.Plugins.Essentials.Endpoints;
namespace VNLib.Plugins.Essentials.Auth.Auth0.Endpoints
{
[ConfigurationName(Auth0Portal.ConfigKey)]
internal sealed class LogoutEndpoint : ProtectedWebEndpoint
{
private readonly IAsyncLazy<VnMemoryStream> ReturnUrl;
public LogoutEndpoint(PluginBase plugin, IConfigScope config)
{
string returnToUrl = config.GetRequiredProperty("return_to_url", p => p.GetString()!);
string logoutUrl = config.GetRequiredProperty("logout_url", p => p.GetString()!);
string path = config.GetRequiredProperty("path", p => p.GetString()!);
InitPathAndLog($"{path}/logout", plugin.Log);
//Build the return url once the client id is available
ReturnUrl = plugin.GetSecretAsync("auth0_client_id").ToLazy(sr =>
{
//The result we will send to users on logout so then can properly redirect their clients
LogoutResult json = new()
{
Url = $"{logoutUrl}?client_id={sr.Result.ToString()}&returnTo={returnToUrl}"
};
VnMemoryStream vms = new();
JsonSerializer.Serialize(vms, json);
return VnMemoryStream.CreateReadonly(vms);
});
}
protected override VfReturnType Post(HttpEntity entity)
{
//Invalidate the login before redirecting the client
entity.InvalidateLogin();
return VirtualClose(
entity,
HttpStatusCode.OK,
Net.Http.ContentType.Json,
ReturnUrl.Value.GetReadonlyShallowCopy() //Return stream shallow copy to avoid alloc and copy
);
}
sealed class LogoutResult
{
[JsonPropertyName("url")]
public string? Url { get; set; }
}
}
}
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