/// <summary>
/// Gets the next <see cref="FileDataPart"/> that will be sent over the network.
/// </summary>
/// <param name="bufferSize">The size of the buffer and amount of data to return.</param>
/// <returns>The bufferSize is adjusted by an estimate of how large the metadata would be, so that the size of the serialized <see cref="FileDataPart"/> should be the same as the bufferSize.</returns>
internal FileDataPart GetNextPart(int bufferSize)
{
if (SendCompleted)
{
return(null);
}
if (Info == null)
{
throw new NullReferenceException("File information not found.");
}
if (!Info.Exists)
{
throw new FileNotFoundException(Info.FullName);
}
bufferSize -= MetaSize;
byte[] buffer = new byte[bufferSize];
lock (SyncRoot)
{
using (FileStream fs = new FileStream(Info.FullName, FileMode.Open, FileAccess.Read))
{
fs.Seek(SentBytes, SeekOrigin.Begin);
int readSize = fs.Read(buffer, 0, bufferSize);
byte[] sizedBuffer = ArrayMethods.Shrink(ref buffer, readSize);
var part = new FileDataPart(Guid, SentBytes, sizedBuffer);
SentBytes += readSize;
return(part);
}
}
}
/// <summary>
/// Gets an estimate of a <see cref="FileDataPart"/>.
/// </summary>
/// <param name="guid">The <see cref="Guid"/> that should be used in the size estimate.</param>
/// <param name="start">The start position that should be used in the size estimate.</param>
/// <param name="size">The size of the data that should be used in the size estimate.</param>
/// <returns>The estimated size, in bytes, of a serialized <see cref="FileDataPart"/>.</returns>
internal static int EstimatePartSize(Guid guid, long start, int size)
{
var part = new FileDataPart(guid, start, new byte[size]);
var bytes = ObjectPacker.Pack(part);
return(bytes.Length + PacketHeader.HeaderSize(bytes.Length));
}
/// <summary>
/// Receives the <see cref="FileDataPart"/> into the specified file.
/// </summary>
/// <param name="file">A <see cref="FileInfo"/> object containing the fully qualified name of the file to receiving the data to.</param>
/// <param name="part">The <see cref="FileDataPart"/> to be received.</param>
internal void ReceivePart(FileInfo file, FileDataPart part)
{
if (ReceiveCompleted)
{
throw new InvalidOperationException("Receive operation for this file has already been completed.");
}
lock (SyncRoot)
{
using (FileStream fs = new FileStream(file.FullName, FileMode.OpenOrCreate, FileAccess.Write))
{
fs.Seek(part.Start, SeekOrigin.Begin);
fs.Write(part.Data, 0, part.Data.Length);
}
LastReceivedSize = part.Data.Length;
ReceivedBytes += part.Data.Length;
}
}
/// <summary>
/// Handles the data of an incoming file, but putting it into the temporary file already
/// obtained through the other HandleIncomingFile method.
/// </summary>
/// <param name="part">The <see cref="FileDataPart"/> containing the data that was received.</param>
/// <returns>The <see cref="FileData"/> object for the part that was received (for event raising).</returns>
/// <remarks>This only runs when legacy support is off.</remarks>
private FileData HandleIncomingFile(FileDataPart part)
{
if (!IncomingFiles.ContainsKey(part.FileGuid))
throw new InvalidOperationException("File part received before file details.");
var file = IncomingFiles[part.FileGuid];
file.ReceivePart(file.Info, part);
return file;
}
/// <summary>
/// Receives the <see cref="FileDataPart"/> into the specified file.
/// </summary>
/// <param name="file">A <see cref="FileInfo"/> object containing the fully qualified name of the file to receiving the data to.</param>
/// <param name="part">The <see cref="FileDataPart"/> to be received.</param>
internal void ReceivePart(FileInfo file, FileDataPart part)
{
if (ReceiveCompleted)
throw new InvalidOperationException("Receive operation for this file has already been completed.");
lock (SyncRoot)
{
using (FileStream fs = new FileStream(file.FullName, FileMode.OpenOrCreate, FileAccess.Write))
{
fs.Seek(part.Start, SeekOrigin.Begin);
fs.Write(part.Data, 0, part.Data.Length);
}
LastReceivedSize = part.Data.Length;
ReceivedBytes += part.Data.Length;
}
}
/// <summary>
/// Receives the <see cref="FileDataPart"/> into the specified file.
/// </summary>
/// <param name="fileName">The fully qualified name of the file, or the relative file name. Do not end the path with the directory separator character.</param>
/// <param name="part">The <see cref="FileDataPart"/> to be received.</param>
internal void ReceivePart(string fileName, FileDataPart part)
{
ReceivePart(new FileInfo(fileName), part);
}
/// <summary>
/// Gets the next <see cref="FileDataPart"/> that will be sent over the network.
/// </summary>
/// <param name="bufferSize">The size of the buffer and amount of data to return.</param>
/// <returns>The bufferSize is adjusted by an estimate of how large the metadata would be, so that the size of the serialized <see cref="FileDataPart"/> should be the same as the bufferSize.</returns>
internal FileDataPart GetNextPart(int bufferSize)
{
if (SendCompleted) return null;
if (Info == null) throw new NullReferenceException("File information not found.");
if (!Info.Exists) throw new FileNotFoundException(Info.FullName);
bufferSize -= MetaSize;
byte[] buffer = new byte[bufferSize];
lock (SyncRoot)
{
using (FileStream fs = new FileStream(Info.FullName, FileMode.Open, FileAccess.Read))
{
fs.Seek(SentBytes, SeekOrigin.Begin);
int readSize = fs.Read(buffer, 0, bufferSize);
byte[] sizedBuffer = ArrayMethods.Shrink(ref buffer, readSize);
var part = new FileDataPart(Guid, SentBytes, sizedBuffer);
SentBytes += readSize;
return part;
}
}
}
/// <summary>
/// Gets an estimate of a <see cref="FileDataPart"/>.
/// </summary>
/// <param name="guid">The <see cref="Guid"/> that should be used in the size estimate.</param>
/// <param name="start">The start position that should be used in the size estimate.</param>
/// <param name="size">The size of the data that should be used in the size estimate.</param>
/// <returns>The estimated size, in bytes, of a serialized <see cref="FileDataPart"/>.</returns>
internal static int EstimatePartSize(Guid guid, long start, int size)
{
var part = new FileDataPart(guid, start, new byte[size]);
var bytes = ObjectPacker.Pack(part);
return bytes.Length + PacketHeader.HeaderSize(bytes.Length);
}
/// <summary>
/// Receives the <see cref="FileDataPart"/> into the specified file.
/// </summary>
/// <param name="fileName">The fully qualified name of the file, or the relative file name. Do not end the path with the directory separator character.</param>
/// <param name="part">The <see cref="FileDataPart"/> to be received.</param>
internal void ReceivePart(string fileName, FileDataPart part)
{
ReceivePart(new FileInfo(fileName), part);
}
