SEBWIN-405: Implemented detection of Moodle session identifier and server disconnection.

SafeExamBrowser.Browser/BrowserApplication.cs

@@ -10,6 +10,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Timers;
 using CefSharp;
 using CefSharp.WinForms;
@@ -353,8 +354,7 @@ namespace SafeExamBrowser.Browser
 				var task = manager.VisitAllCookiesAsync();
 				var cookies = task.GetAwaiter().GetResult();
 				var edxLogin = cookies.FirstOrDefault(c => c.Name == "edxloggedin");
-
+				var moodleSession = cookies.FirstOrDefault(c => c.Name == "MoodleSession");
-				// TODO: MoodleSession
 
 				if (edxLogin != default(Cookie))
 				{
@@ -363,9 +363,15 @@ namespace SafeExamBrowser.Browser
 					if (edxSession != default(Cookie) && !sessionCookies.Contains(edxSession.Domain))
 					{
 						sessionCookies.Add(edxSession.Domain);
-						SessionIdentifierDetected?.Invoke(edxSession.Value);
+						Task.Run(() => SessionIdentifierDetected?.Invoke(edxSession.Value));
 					}
 				}
+
+				if (moodleSession != default(Cookie) && !sessionCookies.Contains(moodleSession.Domain))
+				{
+					sessionCookies.Add(moodleSession.Domain);
+					Task.Run(() => SessionIdentifierDetected?.Invoke(moodleSession.Value));
+				}
 			}
 			catch (Exception e)
 			{

SafeExamBrowser.Client/ClientController.cs

@@ -354,7 +354,6 @@ namespace SafeExamBrowser.Client
 				while (!response.Success)
 				{
 					logger.Error($"Failed to communicate session identifier with server! {response.Message}");
-					// TODO: Check that is running in separat thread (not UI thread!!) or use different mechanism to wait!
 					Thread.Sleep(Settings.Server.RequestAttemptInterval);
 					response = Server.SendSessionIdentifier(identifier);
 				}

SafeExamBrowser.Client/CompositionRoot.cs

@@ -241,7 +241,7 @@ namespace SafeExamBrowser.Client
 
 		private IOperation BuildServerOperation()
 		{
-			var server = new ServerProxy(context.AppConfig, logger);
+			var server = new ServerProxy(context.AppConfig, ModuleLogger(nameof(ServerProxy)));
 			var operation = new ServerOperation(actionCenter, context, logger, server, taskbar);
 
 			context.Server = server;

SafeExamBrowser.Client/Operations/ServerOperation.cs

@@ -70,9 +70,9 @@ namespace SafeExamBrowser.Client.Operations
 				logger.Info("Finalizing server...");
 				StatusChanged?.Invoke(TextKey.OperationStatus_FinalizeServer);
 
-				// TODO: Stop sending pings and logs (or in controller?)
-				server.StopConnectivity();
 				// TODO: Stop action center and taskbar notifications
+
+				server.StopConnectivity();
 			}
 
 			return result;

SafeExamBrowser.Server.Contracts/IServerProxy.cs

@@ -19,12 +19,12 @@ namespace SafeExamBrowser.Server.Contracts
 	public interface IServerProxy
 	{
 		/// <summary>
-		/// Attempts to initialize a connection to the server.
+		/// Attempts to initialize a connection with the server.
 		/// </summary>
 		ServerResponse Connect();
 
 		/// <summary>
-		/// TODO
+		/// Terminates a connection with the server.
 		/// </summary>
 		ServerResponse Disconnect();
 
@@ -39,7 +39,7 @@ namespace SafeExamBrowser.Server.Contracts
 		ServerResponse<Uri> GetConfigurationFor(Exam exam);
 
 		/// <summary>
-		/// Retrieves the information required to establish a connection with this server.
+		/// Retrieves the information required to establish a connection with the server.
 		/// </summary>
 		ConnectionInfo GetConnectionInfo();
 
@@ -54,7 +54,7 @@ namespace SafeExamBrowser.Server.Contracts
 		void Initialize(string api, string connectionToken, string examId, string oauth2Token, ServerSettings settings);
 
 		/// <summary>
-		/// TODO
+		/// Sends the given user session identifier of a LMS and thus establishes a connection with the server.
 		/// </summary>
 		ServerResponse SendSessionIdentifier(string identifier);
 

SafeExamBrowser.Server/ServerProxy.cs

@@ -80,7 +80,23 @@ namespace SafeExamBrowser.Server
 
 		public ServerResponse Disconnect()
 		{
-			return new ServerResponse(false, "TODO!");
+			var authorization = ("Authorization", $"Bearer {oauth2Token}");
+			var contentType = "application/x-www-form-urlencoded";
+			var token = ("SEBConnectionToken", connectionToken);
+
+			var success = TryExecute(HttpMethod.Delete, api.HandshakeEndpoint, out var response, default(string), contentType, authorization, token);
+			var message = ToString(response);
+
+			if (success)
+			{
+				logger.Info("Successfully terminated connection.");
+			}
+			else
+			{
+				logger.Error("Failed to terminate connection!");
+			}
+
+			return new ServerResponse(success, message);
 		}
 
 		public ServerResponse<IEnumerable<Exam>> GetAvailableExams()
@@ -186,7 +202,24 @@ namespace SafeExamBrowser.Server
 
 		public ServerResponse SendSessionIdentifier(string identifier)
 		{
-			return new ServerResponse(false, "TODO!");
+			var authorization = ("Authorization", $"Bearer {oauth2Token}");
+			var content = $"examId={examId}&seb_user_session_id={identifier}";
+			var contentType = "application/x-www-form-urlencoded";
+			var token = ("SEBConnectionToken", connectionToken);
+
+			var success = TryExecute(HttpMethod.Put, api.HandshakeEndpoint, out var response, content, contentType, authorization, token);
+			var message = ToString(response);
+
+			if (success)
+			{
+				logger.Info("Successfully sent session identifier.");
+			}
+			else
+			{
+				logger.Error("Failed to send session identifier!");
+			}
+
+			return new ServerResponse(success, message);
 		}
 
 		public void StartConnectivity()
@@ -352,7 +385,7 @@ namespace SafeExamBrowser.Server
 				try
 				{
 					response = httpClient.SendAsync(request).GetAwaiter().GetResult();
-					logger.Debug($"Request was successful: {request.Method} '{request.RequestUri}' -> {ToString(response)}");
+					logger.Debug($"Completed request: {request.Method} '{request.RequestUri}' -> {ToString(response)}");
 				}
 				catch (TaskCanceledException)
 				{