/// <summary>
/// Dereference a FtpListItem object
/// </summary>
/// <param name="item">The item to dereference</param>
/// <param name="recMax">Maximum recursive calls</param>
/// <param name="count">Counter</param>
/// <param name="token">The token that can be used to cancel the entire process</param>
/// <returns>FtpListItem, null if the link can't be dereferenced</returns>
private async Task <FtpListItem> DereferenceLinkAsync(FtpListItem item, int recMax, IntRef count, CancellationToken token = default(CancellationToken))
{
if (item.Type != FtpFileSystemObjectType.Link)
{
throw new FtpException("You can only dereference a symbolic link. Please verify the item type is Link.");
}
if (item.LinkTarget == null)
{
throw new FtpException("The link target was null. Please check this before trying to dereference the link.");
}
var listing = await GetListingAsync(item.LinkTarget.GetFtpDirectoryName(), token);
foreach (FtpListItem obj in listing)
{
if (item.LinkTarget == obj.FullName)
{
if (obj.Type == FtpFileSystemObjectType.Link)
{
if (++count.Value == recMax)
{
return(null);
}
return(await DereferenceLinkAsync(obj, recMax, count, token));
}
if (HasFeature(FtpCapability.MDTM))
{
var modify = GetModifiedTime(obj.FullName);
if (modify != DateTime.MinValue)
{
obj.Modified = modify;
}
}
if (obj.Type == FtpFileSystemObjectType.File && obj.Size < 0 && HasFeature(FtpCapability.SIZE))
{
obj.Size = GetFileSize(obj.FullName);
}
return(obj);
}
}
return(null);
}