public void Download(byte[] data, int bufferSize, DownloadSegmentPositions[] segmentPositionInfos)
{
BeforeDownload();
DownloadStream inputStream = new DownloadStream(data);
IList<ISegmentDownloadTask> segmentDownloadTasks = new List<ISegmentDownloadTask>(segmentPositionInfos.Length);
IList<DownloadStream> downloadStreams = new List<DownloadStream>(segmentPositionInfos.Length);
MemoryStream outputStream = new MemoryStream();
for (int i = 0; i < segmentPositionInfos.Length; i++)
{
DownloadSegmentPositions segmentPosition = segmentPositionInfos[i];
byte[] dataPart = data.Skip((int) segmentPosition.StartPosition).Take((int)(segmentPosition.EndPosition - segmentPosition.StartPosition + 1)).ToArray();
DownloadStream downloadStream = new DownloadStream(dataPart);
segmentDownloadTasks.Add(CreateSegmentDownloadTask(bufferSize, CreateSegmentDownloader(downloadStream, segmentPosition), CreateSegmentWriter(outputStream)));
downloadStreams.Add(downloadStream);
}
SegmentDownloadManager segmentDownloadManager = new SegmentDownloadManager(new SegmentDownloadTaskCollection(segmentDownloadTasks));
segmentDownloadManager.Start();
segmentDownloadManager.Finish(true);
AfterDownload();
long totalDownloads = downloadStreams.Sum(x => x.TotalDownloads);
Assert.AreEqual(data.Length, totalDownloads);
Assert.AreEqual(inputStream.ToArray().Take(data.Length).ToArray(), outputStream.ToArray().Take(data.Length).ToArray());
Assert.AreEqual(inputStream.ToArray(), outputStream.ToArray());
}
/// <summary>
/// Initializes a new instance of the <see cref="SegmentDownloader"/> class.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="downloadSegmentInfo">The download segment information.</param>
/// <param name="segmentDownloadRateCalculator">The segment download rate calculator.</param>
/// <exception cref="System.ArgumentNullException">downloadSegmentInfo</exception>
public SegmentDownloader(Stream stream, DownloadSegmentPositions downloadSegmentInfo, ISegmentDownloadRateCalculator segmentDownloadRateCalculator)
{
if (downloadSegmentInfo == null)
{
throw new ArgumentNullException("downloadSegmentInfo");
}
m_Stream = stream;
m_SegmentDownloadRateCalculator = segmentDownloadRateCalculator;
m_StartPosition = downloadSegmentInfo.StartPosition;
m_EndPosition = downloadSegmentInfo.EndPosition;
m_CurrentPosition = StartPosition;
}
public void Calculate(int minimumSegmentSize, int maximumSegmentCount, int segmentCount, int fileSize, DownloadSegmentPositions[] expectedPositions)
{
DownloadSegmentPositionsCalculator downloadSegmentPositionsCalculator = new DownloadSegmentPositionsCalculator();
DownloadSegmentPositions[] downloadSegmentPositions = downloadSegmentPositionsCalculator.Calculate(minimumSegmentSize, maximumSegmentCount, segmentCount, fileSize);
Assert.AreEqual(expectedPositions.Length, downloadSegmentPositions.Length);
for (int i = 0; i < expectedPositions.Length; i++)
{
Assert.AreEqual(expectedPositions[i].StartPosition, downloadSegmentPositions[i].StartPosition);
Assert.AreEqual(expectedPositions[i].EndPosition, downloadSegmentPositions[i].EndPosition);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SegmentDownloader"/> class.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="downloadSegmentInfo">The download segment information.</param>
/// <param name="segmentDownloadRateCalculator">The segment download rate calculator.</param>
/// <exception cref="System.ArgumentNullException">downloadSegmentInfo</exception>
public SegmentDownloader(Stream stream, DownloadSegmentPositions downloadSegmentInfo, ISegmentDownloadRateCalculator segmentDownloadRateCalculator)
{
if (downloadSegmentInfo == null)
{
throw new ArgumentNullException("downloadSegmentInfo");
}
m_Stream = stream;
m_SegmentDownloadRateCalculator = segmentDownloadRateCalculator;
m_StartPosition = downloadSegmentInfo.StartPosition;
m_EndPosition = downloadSegmentInfo.EndPosition;
m_CurrentPosition = StartPosition;
}
public void Download(byte[] data, int bufferSize, int endPosition)
{
BeforeDownload();
DownloadStream inputStream = new DownloadStream(data);
MemoryStream outputStream = new MemoryStream();
DownloadSegmentPositions downloadSegmentPositions = new DownloadSegmentPositions(0, endPosition);
ISegmentDownloadTask task = CreateSegmentDownloadTask(bufferSize, CreateSegmentDownloader(inputStream, downloadSegmentPositions), CreateSegmentWriter(outputStream));
task.Download();
AfterDownload();
Assert.AreEqual(endPosition + 1, inputStream.TotalDownloads);
Assert.AreEqual(inputStream.ToArray().Take(endPosition).ToArray(), outputStream.ToArray().Take(endPosition).ToArray());
}
public DownloadSegmentPositions[] Calculate(int minimumSegmentSize, int maximumSegmentCount, int segmentCount, long fileSize)
{
if (fileSize <= 0)
{
return(new[] { new DownloadSegmentPositions(-1, -1) });
}
if (fileSize <= minimumSegmentSize)
{
return(new[] { new DownloadSegmentPositions(0, fileSize - 1) });
}
segmentCount = Math.Min(maximumSegmentCount, segmentCount == 0 ? 1 : segmentCount);
long segmentSize = fileSize / segmentCount;
while (segmentCount > 1 && segmentSize < minimumSegmentSize)
{
segmentCount--;
segmentSize = fileSize / segmentCount;
}
DownloadSegmentPositions[] segmentPositions = new DownloadSegmentPositions[segmentCount];
for (int i = 0; i < segmentCount; i++)
{
long startPosition = i * segmentSize;
long endPosition;
if (i == segmentCount - 1)
{
endPosition = fileSize - 1;
}
else
{
endPosition = startPosition + segmentSize - 1;
}
segmentPositions[i] = new DownloadSegmentPositions(startPosition, endPosition);
}
return(segmentPositions);
}
public DownloadSegmentPositions[] Calculate(int minimumSegmentSize, int maximumSegmentCount, int segmentCount, long fileSize)
{
if (fileSize <= 0)
{
return new[] { new DownloadSegmentPositions(-1, -1) };
}
if (fileSize <= minimumSegmentSize)
{
return new[] { new DownloadSegmentPositions(0, fileSize - 1) };
}
segmentCount = Math.Min(maximumSegmentCount, segmentCount == 0 ? 1 : segmentCount);
long segmentSize = fileSize/segmentCount;
while (segmentCount > 1 && segmentSize < minimumSegmentSize)
{
segmentCount--;
segmentSize = fileSize/segmentCount;
}
DownloadSegmentPositions[] segmentPositions = new DownloadSegmentPositions[segmentCount];
for (int i = 0; i < segmentCount; i++)
{
long startPosition = i*segmentSize;
long endPosition;
if(i == segmentCount - 1)
{
endPosition = fileSize - 1;
}
else
{
endPosition = startPosition + segmentSize - 1;
}
segmentPositions[i] = new DownloadSegmentPositions(startPosition, endPosition);
}
return segmentPositions;
}
/// <summary>
/// Initializes a new instance of the <see cref="SegmentDownloader"/> class.
/// </summary>
/// <param name="file">The file.</param>
/// <param name="networkProtocolProvider">The network protocol provider.</param>
/// <param name="downloadSegmentInfo">The download segment information.</param>
/// <param name="segmentDownloadRateCalculator">The segment download rate calculator.</param>
public SegmentDownloader(DownloadFileInfo file, INetworkProtocolProvider networkProtocolProvider, DownloadSegmentPositions downloadSegmentInfo, ISegmentDownloadRateCalculator segmentDownloadRateCalculator)
: this(null, downloadSegmentInfo, segmentDownloadRateCalculator)
{
m_File = file;
m_NetworkProtocolProvider = networkProtocolProvider;
}
protected virtual ISegmentDownloader CreateSegmentDownloader(Stream inputStream, DownloadSegmentPositions downloadSegmentPositions)
{
return new SegmentDownloader(inputStream, downloadSegmentPositions, new SegmentDownloadRateCalculator(downloadSegmentPositions.StartPosition));
}
/// <summary>
/// Initializes a new instance of the <see cref="SegmentDownloader"/> class.
/// </summary>
/// <param name="file">The file.</param>
/// <param name="networkProtocolProvider">The network protocol provider.</param>
/// <param name="downloadSegmentInfo">The download segment information.</param>
/// <param name="segmentDownloadRateCalculator">The segment download rate calculator.</param>
public SegmentDownloader(DownloadFileInfo file, INetworkProtocolProvider networkProtocolProvider, DownloadSegmentPositions downloadSegmentInfo, ISegmentDownloadRateCalculator segmentDownloadRateCalculator)
: this(null, downloadSegmentInfo, segmentDownloadRateCalculator)
{
m_File = file;
m_NetworkProtocolProvider = networkProtocolProvider;
}