105 lines
3.9 KiB
C#
105 lines
3.9 KiB
C#
/*
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* Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using SafeExamBrowser.Communication.Contracts;
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using SafeExamBrowser.Communication.Contracts.Data;
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using SafeExamBrowser.Communication.Contracts.Events;
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using SafeExamBrowser.Communication.Contracts.Hosts;
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using SafeExamBrowser.Communication.Hosts;
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using SafeExamBrowser.Logging.Contracts;
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namespace SafeExamBrowser.Runtime.Communication
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{
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internal class RuntimeHost : BaseHost, IRuntimeHost
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{
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public bool AllowConnection { get; set; }
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public Guid? AuthenticationToken { private get; set; }
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public event CommunicationEventHandler ClientDisconnected;
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public event CommunicationEventHandler ClientReady;
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public event CommunicationEventHandler<ClientConfigurationEventArgs> ClientConfigurationNeeded;
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public event CommunicationEventHandler<ExamSelectionReplyEventArgs> ExamSelectionReceived;
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public event CommunicationEventHandler<MessageBoxReplyEventArgs> MessageBoxReplyReceived;
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public event CommunicationEventHandler<PasswordReplyEventArgs> PasswordReceived;
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public event CommunicationEventHandler<ReconfigurationEventArgs> ReconfigurationRequested;
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public event CommunicationEventHandler ShutdownRequested;
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public RuntimeHost(string address, IHostObjectFactory factory, ILogger logger, int timeout_ms) : base(address, factory, logger, timeout_ms)
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{
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}
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protected override bool OnConnect(Guid? token = null)
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{
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var authenticated = AuthenticationToken.HasValue && AuthenticationToken == token;
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var accepted = AllowConnection && authenticated;
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if (accepted)
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{
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AllowConnection = false;
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}
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return accepted;
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}
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protected override void OnDisconnect(Interlocutor interlocutor)
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{
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if (interlocutor == Interlocutor.Client)
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{
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ClientDisconnected?.Invoke();
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}
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}
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protected override Response OnReceive(Message message)
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{
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switch (message)
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{
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case ExamSelectionReplyMessage m:
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ExamSelectionReceived?.InvokeAsync(new ExamSelectionReplyEventArgs { RequestId = m.RequestId, SelectedExamId = m.SelectedExamId, Success = m.Success });
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return new SimpleResponse(SimpleResponsePurport.Acknowledged);
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case MessageBoxReplyMessage m:
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MessageBoxReplyReceived?.InvokeAsync(new MessageBoxReplyEventArgs { RequestId = m.RequestId, Result = m.Result });
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return new SimpleResponse(SimpleResponsePurport.Acknowledged);
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case PasswordReplyMessage m:
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PasswordReceived?.InvokeAsync(new PasswordReplyEventArgs { Password = m.Password, RequestId = m.RequestId, Success = m.Success });
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return new SimpleResponse(SimpleResponsePurport.Acknowledged);
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case ReconfigurationMessage m:
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ReconfigurationRequested?.InvokeAsync(new ReconfigurationEventArgs { ConfigurationPath = m.ConfigurationPath });
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return new SimpleResponse(SimpleResponsePurport.Acknowledged);
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}
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return new SimpleResponse(SimpleResponsePurport.UnknownMessage);
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}
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protected override Response OnReceive(SimpleMessagePurport message)
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{
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switch (message)
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{
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case SimpleMessagePurport.ClientIsReady:
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ClientReady?.Invoke();
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return new SimpleResponse(SimpleResponsePurport.Acknowledged);
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case SimpleMessagePurport.ConfigurationNeeded:
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return HandleConfigurationRequest();
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case SimpleMessagePurport.RequestShutdown:
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ShutdownRequested?.Invoke();
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return new SimpleResponse(SimpleResponsePurport.Acknowledged);
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}
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return new SimpleResponse(SimpleResponsePurport.UnknownMessage);
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}
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private Response HandleConfigurationRequest()
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{
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var args = new ClientConfigurationEventArgs();
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ClientConfigurationNeeded?.Invoke(args);
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return new ConfigurationResponse { Configuration = args.ClientConfiguration };
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}
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}
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}
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