seb-win-refactoring/SafeExamBrowser.Client/Communication/ClientHost.cs

85 lines
2.6 KiB
C#

/*
* Copyright (c) 2018 ETH Zürich, Educational Development and Technology (LET)
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
using System;
using SafeExamBrowser.Communication.Hosts;
using SafeExamBrowser.Contracts.Communication.Data;
using SafeExamBrowser.Contracts.Communication.Events;
using SafeExamBrowser.Contracts.Communication.Hosts;
using SafeExamBrowser.Contracts.Logging;
namespace SafeExamBrowser.Client.Communication
{
internal class ClientHost : BaseHost, IClientHost
{
private bool allowConnection = true;
private int processId;
public Guid StartupToken { private get; set; }
public bool IsConnected { get; private set; }
public event CommunicationEventHandler<PasswordRequestEventArgs> PasswordRequested;
public event CommunicationEventHandler<ReconfigurationEventArgs> ReconfigurationDenied;
public event CommunicationEventHandler RuntimeDisconnected;
public event CommunicationEventHandler Shutdown;
public ClientHost(string address, IHostObjectFactory factory, ILogger logger, int processId) : base(address, factory, logger)
{
this.processId = processId;
}
protected override bool OnConnect(Guid? token)
{
var authenticated = StartupToken == token;
var accepted = allowConnection && authenticated;
if (accepted)
{
allowConnection = false;
IsConnected = true;
}
return accepted;
}
protected override void OnDisconnect()
{
RuntimeDisconnected?.Invoke();
IsConnected = false;
}
protected override Response OnReceive(Message message)
{
switch (message)
{
case PasswordRequestMessage p:
PasswordRequested?.InvokeAsync(new PasswordRequestEventArgs { Purpose = p.Purpose, RequestId = p.RequestId });
return new SimpleResponse(SimpleResponsePurport.Acknowledged);
case ReconfigurationDeniedMessage r:
ReconfigurationDenied?.InvokeAsync(new ReconfigurationEventArgs { ConfigurationPath = r.FilePath });
return new SimpleResponse(SimpleResponsePurport.Acknowledged);
}
return new SimpleResponse(SimpleResponsePurport.UnknownMessage);
}
protected override Response OnReceive(SimpleMessagePurport message)
{
switch (message)
{
case SimpleMessagePurport.Authenticate:
return new AuthenticationResponse { ProcessId = processId };
case SimpleMessagePurport.Shutdown:
Shutdown?.Invoke();
return new SimpleResponse(SimpleResponsePurport.Acknowledged);
}
return new SimpleResponse(SimpleResponsePurport.UnknownMessage);
}
}
}