C# 在TCP侦听器中从网络流读取数据
我有一个网络流,其中包含文件名和文件数据。我正在发送一些文件块,每个文件块都带有文件名,便于识别。你能帮我正确读取网络流并将所有数据写入文件流吗。 当我从网络流中写入数据时,似乎遗漏了几个字节。 例如,文件名长度将以oth索引表示,文件名将从第四个索引开始C# 在TCP侦听器中从网络流读取数据,c#,C#,我有一个网络流,其中包含文件名和文件数据。我正在发送一些文件块,每个文件块都带有文件名,便于识别。你能帮我正确读取网络流并将所有数据写入文件流吗。 当我从网络流中写入数据时,似乎遗漏了几个字节。 例如,文件名长度将以oth索引表示,文件名将从第四个索引开始 Client: int NoOfPackets = Convert.ToInt32 (Math.Ceiling((Convert.ToDouble(Fs.Length))/ Convert.ToDoubl
Client:
int NoOfPackets = Convert.ToInt32
(Math.Ceiling((Convert.ToDouble(Fs.Length))/ Convert.ToDouble(BufferSize)));
int TotalLength = (NoOfPackets *4+fileNameByte.Length) +(int)Fs.Length, CurrentPacketLength, counter = 0;
netstream1 = client.GetStream();
for (int i = 0; i < NoOfPackets+1 ; i++)
{
if (TotalLength > BufferSize)
{
CurrentPacketLength = BufferSize;
TotalLength = TotalLength - CurrentPacketLength;
}
else
CurrentPacketLength = TotalLength;
SendingBuffer = new byte[CurrentPacketLength];
fileNameLength.CopyTo(SendingBuffer, 0);
fileNameByte.CopyTo(SendingBuffer, 4);
Fs.Read(SendingBuffer, 4 + fileNameByte.Length, CurrentPacketLength - (4 + fileNameByte.Length));
netstream1.Write(SendingBuffer, 0, SendingBuffer.Length);
netstream1.Flush();
}
尽管您和任何人一样含糊不清,但我还是建议您创建一个结构,以便以已知格式完成数据的序列化和反序列化!!而且数据丢失是可以避免的!!
同样,如果你的方法是已知的,这将是非常有助于回答你的问题 请显示您的相关代码和您尝试过的内容。根据给定的信息,不可能找到问题。
client = Listener.AcceptTcpClient();
client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);
//client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Linger, true);
client.Client.LingerState = new LingerOption(true, 300);
client.Client.SendTimeout = 300000;
client.Client.ReceiveTimeout = 300000;
client.NoDelay = true;
NetworkStream netstream = client.GetStream();
MemoryStream ms = new MemoryStream();
bool first = true;
string fullPath = "";
byte[] RecData = new byte[512000];
while ((RecBytes = netstream.Read
(RecData, 0, RecData.Length)) > 0)
{
int fileNameLen = RecData[0];
if (fileNameLen > 0 && first)
{
string name1 = "", name2 = "";
first = false;
name1 = Encoding.UTF8.GetString(RecData, 4, fileNameLen);
name2 = name1;
string folderName = "";
if (name2.Contains("\\"))
{
folderName = name2.Substring(0, name2.LastIndexOf("\\"));
if (!Directory.Exists("D:\\123\\" + folderName))
Directory.CreateDirectory("D:\\123\\" + folderName);
}
if (folderName != "")
fullPath = "D:\\123\\" + folderName + "\\" + name2.Substring(name2.LastIndexOf("\\") + 1);
else
fullPath = "D:\\123\\" + name2.Substring(name2.LastIndexOf("\\") + 1);
}
if (!File.Exists(fullPath))
{
//file = new FileStream(fullPath, FileMode.OpenOrCreate, FileAccess.Write);
while (true)
{
try
{
using (FileStream file = new FileStream(fullPath, FileMode.OpenOrCreate, FileAccess.Write))
{
if (RecBytes - (4 + fileNameLen) > 0)
file.Write(RecData, 4 + fileNameLen, RecBytes - (4 + fileNameLen));
break;
}
}
catch (IOException)
{
Thread.Sleep(20);
}
}
//using (file = File.Create(fullPath))
//{
// file.Write(data, 4 + fileNameLen, (int)data.Length - (4 + fileNameLen));
//}
}
else
{
while (true)
{
try
{
using (FileStream file = new FileStream(fullPath, FileMode.Append, FileAccess.Write))
{
if (RecBytes - (4 + fileNameLen) > 0)
file.Write(RecData, 4 + fileNameLen, RecBytes - (4 + fileNameLen));
break;
}
}
catch (IOException)
{
Thread.Sleep(20);
}
}
}
}
ms.Close();
netstream.Close();
client.Close();