/// <summary>
/// Creates a new backtracking solver run.
/// </summary>
/// <param name="requirements">The top-level requirements the solver should try to meet.</param>
/// <param name="cancellationToken">Used to signal when the user wishes to cancel the solver run.</param>
/// <param name="candidateProvider">Generates <see cref="SelectionCandidate"/>s for the solver to choose among.</param>
public Pass([NotNull] Requirements requirements, CancellationToken cancellationToken, [NotNull] SelectionCandidateProvider candidateProvider)
{
#region Sanity checks
if (requirements == null) throw new ArgumentNullException(nameof(requirements));
#endregion
_cancellationToken = cancellationToken;
_candidateProvider = candidateProvider;
_topLevelRequirements = requirements;
Selections.InterfaceUri = requirements.InterfaceUri;
Selections.Command = requirements.Command;
}
/// <inheritdoc/>
public void Run(CancellationToken cancellationToken = default(CancellationToken), ICredentialProvider credentialProvider = null, IProgress<TaskSnapshot> progress = null)
{
cancellationToken.ThrowIfCancellationRequested();
CancellationToken = cancellationToken;
_progress = progress;
CredentialProvider = credentialProvider;
State = TaskState.Started;
try
{
// Run task with privileges of original user if possible
if (_originalIdentity != null)
{
using (_originalIdentity.Impersonate())
Execute();
}
else Execute();
}
#region Error handling
catch (OperationCanceledException)
{
State = TaskState.Canceled;
throw;
}
catch (IOException)
{
State = TaskState.IOError;
throw;
}
catch (UnauthorizedAccessException)
{
State = TaskState.IOError;
throw;
}
catch (WebException)
{
State = TaskState.WebError;
throw;
}
#endregion
}
/// <summary>
/// Writes the entire content of a stream to a file.
/// </summary>
/// <param name="stream">The stream to read from.</param>
/// <param name="path">The path of the file to write.</param>
/// <param name="bufferSize">The size of the buffer to use for copying in bytes.</param>
/// <param name="cancellationToken">Used to signal when the user wishes to cancel the copy process.</param>
/// <param name="progress">Used to report back the number of bytes that have been copied so far. Callbacks are rate limited to once every 250ms.</param>
public static void CopyToFile([NotNull] this Stream stream, [NotNull, Localizable(false)] string path, int bufferSize = 4096, CancellationToken cancellationToken = default(CancellationToken), Tasks.IProgress<long> progress = null)
{
#region Sanity checks
if (stream == null) throw new ArgumentNullException(nameof(stream));
if (string.IsNullOrEmpty(path)) throw new ArgumentNullException(nameof(path));
#endregion
using (var fileStream = File.Create(path))
stream.CopyToEx(fileStream, bufferSize, cancellationToken, progress);
}
public static void CopyToEx([NotNull] this Stream source, [NotNull] Stream destination, int bufferSize = 4096, CancellationToken cancellationToken = default(CancellationToken), Tasks.IProgress<long> progress = null)
{
#region Sanity checks
if (source == null) throw new ArgumentNullException(nameof(source));
if (destination == null) throw new ArgumentNullException(nameof(destination));
#endregion
if (source.CanSeek) source.Position = 0;
var buffer = new byte[bufferSize];
int read;
long sum = 0;
do
{
cancellationToken.ThrowIfCancellationRequested();
sum += read = source.Read(buffer, 0, buffer.Length);
destination.Write(buffer, 0, read);
progress?.Report(sum);
} while (read != 0);
}
