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我正在尝试将文本文件从基于 wpf 的 C# 服务器传递到我制作的 C 客户端。
出于某种原因，在 C 部分，当我尝试写入文件时，它说
一个无效参数被传递给一个认为无效参数致命的函数。
在 fwrite 函数中。
这可能是什么原因造成的？
我检查了发送的文件大小，没问题，双方打印的大小相同，从 C# 端它说已全部发送，但在 C 端写入文件失败。
用于传输的 C# 代码：
public static voID Sendfile(Socket clIEntSocket,String fileName)
{
String folder = @"C:\Users\Roy\source\repos\GUI243\GUI243\";
String fullPath = folder + filename;
fileInfo fi = new fileInfo(fullPath);
long file_size = fi.Length;
byte[] preBuffer;
using (var memoryStream = new MemoryStream())
{
using (BinaryWriter writer = new BinaryWriter(memoryStream))
{
writer.Write(file_sizE);
messageBox.Show(file_size.ToString());
}
preBuffer = memoryStream.ToArray();
}
clIEntSocket.Send(preBuffer); // sending size
using (BinaryReader reader = new BinaryReader(new fileStream(fullPath,fileMode.open)))
{
byte[] message = new Byte[4096];
int size_passed = 0;
do
{
reader.baseStream.Seek(size_passed,SeekOrigin.begin);
reader.Read(message,4096);
clIEntSocket.Send(messagE);
size_passed += 4096;
file_size -= message.Length;
} while (file_size > 0);
}
// clIEntSocket.Sendfile(fullPath,preBuffer,null,TransmitfiLeoptionS.UseDefaultWorkerThread);
messageBox.Show("file has been sent!");
}
}
C 客户端：
/*
============================================
General : function is responsible for receiving a length of data from the clIEnt
Parameters : sock - clIEnt socket to receive the data from
*buf - holds a pointer to the buffer that needs to update
bufsize - the length of the buffer
Return Value : returns TRUE when the data is read correctly
else,falSE when there was a socket error or no bytes are received.
============================================
*/
bool recv_raw(SOCKET sock,void* buf,int bufsizE)
{
unsigned char* pbuf = (unsigned char*)buf;
while (bufsize > 0) {
int num = recv(sock,pbuf,bufsize,0);
if (num <= 0) { return false; }
pbuf += num;
bufsize -= num;
}
return true;
}
/*
===================================================
General : receives the length of the file and updates it
Parameters : sock - clIEnt socket to receive the data from
*filesize - holds a pointer to the size of the buffer that needs to update
filesize_len - the length of the file size pointer
Return Value : returns TRUE when the size is read correctly
else,falSE when there was a socket error or no bytes are received.
===================================================
*/
bool recv_file_len(SOCKET sock,long* filesizE)
{
if (!recv_raw(sock,filesize,sizeof(*filesizE))) { return false; }
return true;
}
/*
===================================================
General : writes to the lua file the data from the file
that was received in the socket
Parameters : sock - the socket between the clIEnt and server
*f - the file to write the data received to
Return Value : returns TRUE when everything was written to the file.
returns falSE if there's no data received or detected a socket problem.
===================================================
*/
bool receive_and_write_file(SOCKET sock,file *f)
{
long filesize;//size of address
if (!recv_file_len(sock,&filesizE)) { return false; }
printf("file size (From C# clIEnt) : %ld\n",filesizE);
if (filesize > 0)
{
char buffer[BUFFER_SIZE];
do {
int num = min(filesize,BUFFER_SIZE);
if (!recv_raw(sock,buffer,num)) {
return false;
}
int offset = 0;
do
{
size_t written = fwrite(&buffer[offset],1,num - offset,f); // the Fatal error
if (written < 1) { return false; }
offset += written;
} while (offset < num);
filesize -= num;
} while (filesize > 0);
}
return true;
}
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