From 751e1a107195f0c9c98c866e8267a5a760545982 Mon Sep 17 00:00:00 2001
From: vnugent <public@vaughnnugent.com>
Date: Thu, 12 Jan 2023 17:47:41 -0500
Subject: Large project reorder and consolidation

---
 .../src/O2SessionProviderEntry.cs                  | 120 +++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 libs/VNLib.Plugins.Sessions.OAuth/src/O2SessionProviderEntry.cs

(limited to 'libs/VNLib.Plugins.Sessions.OAuth/src/O2SessionProviderEntry.cs')

diff --git a/libs/VNLib.Plugins.Sessions.OAuth/src/O2SessionProviderEntry.cs b/libs/VNLib.Plugins.Sessions.OAuth/src/O2SessionProviderEntry.cs
new file mode 100644
index 0000000..073ed82
--- /dev/null
+++ b/libs/VNLib.Plugins.Sessions.OAuth/src/O2SessionProviderEntry.cs
@@ -0,0 +1,120 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins.Essentials.Sessions.OAuth
+* File: O2SessionProviderEntry.cs 
+*
+* O2SessionProviderEntry.cs is part of VNLib.Plugins.Essentials.Sessions.OAuth which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins.Essentials.Sessions.OAuth 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.Sessions.OAuth 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.Text.Json;
+
+using VNLib.Net.Http;
+using VNLib.Utils.Logging;
+using VNLib.Utils.Extensions;
+using VNLib.Data.Caching;
+using VNLib.Plugins.Sessions.Cache.Client;
+using VNLib.Plugins.Essentials;
+using VNLib.Plugins.Essentials.Sessions;
+using VNLib.Plugins.Essentials.Oauth.Tokens;
+using VNLib.Plugins.Essentials.Oauth.Applications;
+using VNLib.Plugins.Sessions.OAuth.Endpoints;
+using VNLib.Plugins.Extensions.VNCache;
+using VNLib.Plugins.Extensions.Loading;
+using VNLib.Plugins.Extensions.Loading.Routing;
+using VNLib.Plugins.Extensions.Loading.Sql;
+using VNLib.Plugins.Extensions.Loading.Events;
+
+
+namespace VNLib.Plugins.Sessions.OAuth
+{
+
+    public sealed class O2SessionProviderEntry : ISessionProvider
+    {
+        const string OAUTH2_CONFIG_KEY = "oauth2";
+
+        private OAuth2SessionProvider? _sessions;
+
+        public bool CanProcess(IHttpEvent entity)
+        {
+            //If authorization header is set try to process as oauth2 session
+            return _sessions != null && entity.Server.Headers.HeaderSet(System.Net.HttpRequestHeader.Authorization);
+        }
+
+        ValueTask<SessionHandle> ISessionProvider.GetSessionAsync(IHttpEvent entity, CancellationToken cancellationToken)
+        {
+            return _sessions!.GetSessionAsync(entity, cancellationToken);
+        }
+        
+
+        public void Load(PluginBase plugin, ILogProvider localized)
+        {
+            IReadOnlyDictionary<string, JsonElement> oauth2Config = plugin.GetConfigForType<OAuth2SessionProvider>();
+
+            //Access token endpoint is optional
+            if (oauth2Config.TryGetValue("token_path", out JsonElement el))
+            {
+                //Init auth endpoint
+                AccessTokenEndpoint authEp = new(el.GetString()!, plugin, CreateTokenDelegateAsync);
+
+                //route auth endpoint
+                plugin.Route(authEp);
+            }
+
+            //Optional revocation endpoint
+            if (plugin.HasConfigForType<RevocationEndpoint>())
+            {
+                //Route revocation endpoint
+                plugin.Route<RevocationEndpoint>();
+            }
+
+            int cacheLimit = oauth2Config["cache_size"].GetInt32();
+            int maxTokensPerApp = oauth2Config["max_tokens_per_app"].GetInt32();
+            int sessionIdSize = (int)oauth2Config["access_token_size"].GetUInt32();
+            TimeSpan tokenValidFor = oauth2Config["token_valid_for_sec"].GetTimeSpan(TimeParseType.Seconds);
+            TimeSpan cleanupInterval = oauth2Config["gc_interval_sec"].GetTimeSpan(TimeParseType.Seconds);
+            string sessionIdPrefix = oauth2Config["cache_prefix"].GetString() ?? throw new KeyNotFoundException($"Missing required key 'cache_prefix' in '{OAUTH2_CONFIG_KEY}' config");
+
+            //init the id provider
+            OAuth2SessionIdProvider idProv = new(sessionIdPrefix, maxTokensPerApp, sessionIdSize, tokenValidFor);
+
+            //Get shared global-cache
+            IGlobalCacheProvider globalCache = plugin.GetGlobalCache(localized);
+
+            //Create cache store from global cache
+            GlobalCacheStore cacheStore = new(globalCache);
+
+            //Init session provider now that client is loaded
+            _sessions = new(cacheStore, cacheLimit, 100, idProv, plugin.GetContextOptions());
+
+            //Schedule cleanup interval with the plugin scheduler
+            plugin.ScheduleInterval(_sessions, cleanupInterval);
+
+            //Wait and cleanup expired sessions
+            _ = plugin.DeferTask(() => _sessions.CleanupExpiredSessionsAsync(localized, plugin.UnloadToken), 1000);
+
+            localized.Information("Session provider loaded");
+
+        }
+
+        private async Task<IOAuth2TokenResult?> CreateTokenDelegateAsync(HttpEntity entity, UserApplication app, CancellationToken cancellation)
+        {
+            return await _sessions!.CreateAccessTokenAsync(entity, app, cancellation).ConfigureAwait(false);
+        }
+    }
+}
\ No newline at end of file
-- 
cgit