fixes #789 - Security Issue: API allows access to any folder of the PC running MediaBrowser

MediaBrowser.Server.Implementations/HttpServer/Security/SessionContext.cs

@@ -0,0 +1,36 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Net;
+using MediaBrowser.Controller.Session;
+using ServiceStack.Web;
+
+namespace MediaBrowser.Server.Implementations.HttpServer.Security
+{
+    public class SessionContext : ISessionContext
+    {
+        private readonly IUserManager _userManager;
+        private readonly ISessionManager _sessionManager;
+        private readonly IAuthorizationContext _authContext;
+
+        public SessionContext(IUserManager userManager, IAuthorizationContext authContext, ISessionManager sessionManager)
+        {
+            _userManager = userManager;
+            _authContext = authContext;
+            _sessionManager = sessionManager;
+        }
+
+        public SessionInfo GetSession(IRequest requestContext)
+        {
+            var authorization = _authContext.GetAuthorizationInfo(requestContext);
+
+            return _sessionManager.GetSession(authorization.DeviceId, authorization.Client, authorization.Version);
+        }
+
+        public User GetUser(IRequest requestContext)
+        {
+            var session = GetSession(requestContext);
+
+            return session == null || !session.UserId.HasValue ? null : _userManager.GetUserById(session.UserId.Value);
+        }
+    }
+}