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Patch data-races and minor changes in SyncPlay

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This commit is contained in:
Ionut Andrei Oanca
2020-11-15 17:03:27 +01:00
parent 5d77f422f0
commit c7e53bce2f
20 changed files with 383 additions and 385 deletions
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312
Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs
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@@ -72,19 +72,9 @@ namespace Emby.Server.Implementations.SyncPlay
_userManager = userManager;
_sessionManager = sessionManager;
_libraryManager = libraryManager;
_sessionManager.SessionStarted += OnSessionManagerSessionStarted;
_sessionManager.SessionEnded += OnSessionManagerSessionEnded;
_sessionManager.PlaybackStart += OnSessionManagerPlaybackStart;
_sessionManager.PlaybackStopped += OnSessionManagerPlaybackStopped;
}
/// <summary>
/// Gets all groups.
/// </summary>
/// <value>All groups.</value>
public IEnumerable<IGroupController> Groups => _groups.Values;
/// <inheritdoc />
public void Dispose()
{
@@ -92,127 +82,6 @@ namespace Emby.Server.Implementations.SyncPlay
GC.SuppressFinalize(this);
}
/// <summary>
/// Releases unmanaged and optionally managed resources.
/// </summary>
/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_sessionManager.SessionStarted -= OnSessionManagerSessionStarted;
_sessionManager.SessionEnded -= OnSessionManagerSessionEnded;
_sessionManager.PlaybackStart -= OnSessionManagerPlaybackStart;
_sessionManager.PlaybackStopped -= OnSessionManagerPlaybackStopped;
_disposed = true;
}
private void OnSessionManagerSessionStarted(object sender, SessionEventArgs e)
{
var session = e.SessionInfo;
if (!IsSessionInGroup(session))
{
return;
}
var groupId = GetSessionGroup(session) ?? Guid.Empty;
var request = new JoinGroupRequest()
{
GroupId = groupId
};
JoinGroup(session, groupId, request, CancellationToken.None);
}
private void OnSessionManagerSessionEnded(object sender, SessionEventArgs e)
{
var session = e.SessionInfo;
if (!IsSessionInGroup(session))
{
return;
}
// TODO: probably remove this event, not used at the moment.
}
private void OnSessionManagerPlaybackStart(object sender, PlaybackProgressEventArgs e)
{
var session = e.Session;
if (!IsSessionInGroup(session))
{
return;
}
// TODO: probably remove this event, not used at the moment.
}
private void OnSessionManagerPlaybackStopped(object sender, PlaybackStopEventArgs e)
{
var session = e.Session;
if (!IsSessionInGroup(session))
{
return;
}
// TODO: probably remove this event, not used at the moment.
}
private bool IsRequestValid<T>(SessionInfo session, GroupRequestType requestType, T request, bool checkRequest = true)
{
if (session == null || (request == null && checkRequest))
{
return false;
}
var user = _userManager.GetUserById(session.UserId);
if (user.SyncPlayAccess == SyncPlayAccess.None)
{
_logger.LogWarning("IsRequestValid: {0} does not have access to SyncPlay. Requested {1}.", session.Id, requestType);
var error = new GroupUpdate<string>()
{
// TODO: rename to a more generic error. Next PR will fix this.
Type = GroupUpdateType.JoinGroupDenied
};
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return false;
}
if (requestType.Equals(GroupRequestType.NewGroup) && user.SyncPlayAccess != SyncPlayAccess.CreateAndJoinGroups)
{
_logger.LogWarning("IsRequestValid: {0} does not have permission to create groups.", session.Id);
var error = new GroupUpdate<string>
{
Type = GroupUpdateType.CreateGroupDenied
};
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return false;
}
return true;
}
private bool IsRequestValid(SessionInfo session, GroupRequestType requestType)
{
return IsRequestValid(session, requestType, session, false);
}
private bool IsSessionInGroup(SessionInfo session)
{
return _sessionToGroupMap.ContainsKey(session.Id);
}
private Guid? GetSessionGroup(SessionInfo session)
{
_sessionToGroupMap.TryGetValue(session.Id, out var group);
return group?.GroupId;
}
/// <inheritdoc />
public void NewGroup(SessionInfo session, NewGroupRequest request, CancellationToken cancellationToken)
{
@@ -229,9 +98,10 @@ namespace Emby.Server.Implementations.SyncPlay
LeaveGroup(session, cancellationToken);
}
var group = new GroupController(_logger, _userManager, _sessionManager, _libraryManager, this);
var group = new GroupController(_logger, _userManager, _sessionManager, _libraryManager);
_groups[group.GroupId] = group;
AddSessionToGroup(session, group);
group.CreateGroup(session, request, cancellationToken);
}
}
@@ -253,25 +123,18 @@ namespace Emby.Server.Implementations.SyncPlay
if (group == null)
{
_logger.LogWarning("JoinGroup: {0} tried to join group {0} that does not exist.", session.Id, groupId);
_logger.LogWarning("JoinGroup: {SessionId} tried to join group {GroupId} that does not exist.", session.Id, groupId);
var error = new GroupUpdate<string>()
{
Type = GroupUpdateType.GroupDoesNotExist
};
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.GroupDoesNotExist, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return;
}
if (!group.HasAccessToPlayQueue(user))
{
_logger.LogWarning("JoinGroup: {0} does not have access to some content from the playing queue of group {1}.", session.Id, group.GroupId.ToString());
_logger.LogWarning("JoinGroup: {SessionId} does not have access to some content from the playing queue of group {GroupId}.", session.Id, group.GroupId.ToString());
var error = new GroupUpdate<string>()
{
GroupId = group.GroupId.ToString(),
Type = GroupUpdateType.LibraryAccessDenied
};
var error = new GroupUpdate<string>(group.GroupId, GroupUpdateType.LibraryAccessDenied, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return;
}
@@ -287,6 +150,7 @@ namespace Emby.Server.Implementations.SyncPlay
LeaveGroup(session, cancellationToken);
}
AddSessionToGroup(session, group);
group.SessionJoin(session, request, cancellationToken);
}
}
@@ -307,21 +171,19 @@ namespace Emby.Server.Implementations.SyncPlay
if (group == null)
{
_logger.LogWarning("LeaveGroup: {0} does not belong to any group.", session.Id);
_logger.LogWarning("LeaveGroup: {SessionId} does not belong to any group.", session.Id);
var error = new GroupUpdate<string>()
{
Type = GroupUpdateType.NotInGroup
};
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return;
}
RemoveSessionFromGroup(session, group);
group.SessionLeave(session, cancellationToken);
if (group.IsGroupEmpty())
{
_logger.LogInformation("LeaveGroup: removing empty group {0}.", group.GroupId);
_logger.LogInformation("LeaveGroup: removing empty group {GroupId}.", group.GroupId);
_groups.Remove(group.GroupId, out _);
}
}
@@ -338,11 +200,14 @@ namespace Emby.Server.Implementations.SyncPlay
var user = _userManager.GetUserById(session.UserId);
return _groups
.Values
.Where(group => group.HasAccessToPlayQueue(user))
.Select(group => group.GetInfo())
.ToList();
lock (_groupsLock)
{
return _groups
.Values
.Where(group => group.HasAccessToPlayQueue(user))
.Select(group => group.GetInfo())
.ToList();
}
}
/// <inheritdoc />
@@ -360,12 +225,9 @@ namespace Emby.Server.Implementations.SyncPlay
if (group == null)
{
_logger.LogWarning("HandleRequest: {0} does not belong to any group.", session.Id);
_logger.LogWarning("HandleRequest: {SessionId} does not belong to any group.", session.Id);
var error = new GroupUpdate<string>()
{
Type = GroupUpdateType.NotInGroup
};
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return;
}
@@ -374,8 +236,74 @@ namespace Emby.Server.Implementations.SyncPlay
}
}
/// <inheritdoc />
public void AddSessionToGroup(SessionInfo session, IGroupController group)
/// <summary>
/// Releases unmanaged and optionally managed resources.
/// </summary>
/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_sessionManager.SessionStarted -= OnSessionManagerSessionStarted;
_disposed = true;
}
private void OnSessionManagerSessionStarted(object sender, SessionEventArgs e)
{
var session = e.SessionInfo;
lock (_groupsLock)
{
if (!IsSessionInGroup(session))
{
return;
}
var groupId = GetSessionGroup(session);
var request = new JoinGroupRequest(groupId);
JoinGroup(session, groupId, request, CancellationToken.None);
}
}
/// <summary>
/// Checks if a given session has joined a group.
/// </summary>
/// <remarks>
/// Not thread-safe, call only under groups-lock.
/// </remarks>
/// <param name="session">The session.</param>
/// <returns><c>true</c> if the session has joined a group, <c>false</c> otherwise.</returns>
private bool IsSessionInGroup(SessionInfo session)
{
return _sessionToGroupMap.ContainsKey(session.Id);
}
/// <summary>
/// Gets the group joined by the given session, if any.
/// </summary>
/// <remarks>
/// Not thread-safe, call only under groups-lock.
/// </remarks>
/// <param name="session">The session.</param>
/// <returns>The group identifier if the session has joined a group, an empty identifier otherwise.</returns>
private Guid GetSessionGroup(SessionInfo session)
{
_sessionToGroupMap.TryGetValue(session.Id, out var group);
return group?.GroupId ?? Guid.Empty;
}
/// <summary>
/// Maps a session to a group.
/// </summary>
/// <remarks>
/// Not thread-safe, call only under groups-lock.
/// </remarks>
/// <param name="session">The session.</param>
/// <param name="group">The group.</param>
/// <exception cref="InvalidOperationException">Thrown when the user is in another group already.</exception>
private void AddSessionToGroup(SessionInfo session, IGroupController group)
{
if (session == null)
{
@@ -390,8 +318,16 @@ namespace Emby.Server.Implementations.SyncPlay
_sessionToGroupMap[session.Id] = group ?? throw new InvalidOperationException("Group is null!");
}
/// <inheritdoc />
public void RemoveSessionFromGroup(SessionInfo session, IGroupController group)
/// <summary>
/// Unmaps a session from a group.
/// </summary>
/// <remarks>
/// Not thread-safe, call only under groups-lock.
/// </remarks>
/// <param name="session">The session.</param>
/// <param name="group">The group.</param>
/// <exception cref="InvalidOperationException">Thrown when the user is not found in the specified group.</exception>
private void RemoveSessionFromGroup(SessionInfo session, IGroupController group)
{
if (session == null)
{
@@ -414,5 +350,55 @@ namespace Emby.Server.Implementations.SyncPlay
throw new InvalidOperationException("Session was in wrong group!");
}
}
/// <summary>
/// Checks if a given session is allowed to make a given request.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="requestType">The request type.</param>
/// <param name="request">The request.</param>
/// <param name="checkRequest">Whether to check if request is null.</param>
/// <returns><c>true</c> if the request is valid, <c>false</c> otherwise. Will return <c>false</c> also when session is null.</returns>
private bool IsRequestValid<T>(SessionInfo session, GroupRequestType requestType, T request, bool checkRequest = true)
{
if (session == null || (request == null && checkRequest))
{
return false;
}
var user = _userManager.GetUserById(session.UserId);
if (user.SyncPlayAccess == SyncPlayAccess.None)
{
_logger.LogWarning("IsRequestValid: {SessionId} does not have access to SyncPlay. Requested {RequestType}.", session.Id, requestType);
// TODO: rename to a more generic error. Next PR will fix this.
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.JoinGroupDenied, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return false;
}
if (requestType.Equals(GroupRequestType.NewGroup) && user.SyncPlayAccess != SyncPlayAccess.CreateAndJoinGroups)
{
_logger.LogWarning("IsRequestValid: {SessionId} does not have permission to create groups.", session.Id);
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.CreateGroupDenied, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
return false;
}
return true;
}
/// <summary>
/// Checks if a given session is allowed to make a given type of request.
/// </summary>
/// <param name="session">The session.</param>
/// <param name="requestType">The request type.</param>
/// <returns><c>true</c> if the request is valid, <c>false</c> otherwise. Will return <c>false</c> also when session is null.</returns>
private bool IsRequestValid(SessionInfo session, GroupRequestType requestType)
{
return IsRequestValid(session, requestType, session, false);
}
}
}