Windows网络编程之winsock实现文件传输示例

2024-04-09 08:25:04 23

本文实例展示了Windows网络编程中winsock实现文件传输的方法，对于进行Windows下的winsock网络编程有一定的借鉴参考价值。

该程序代码主要是基于TCP流协议的winsock网络文件传输示例，采用Windows下的C语言编写。可以实现传递任何格式文件的文件传输功能。

具体实现代码如下：

Server端代码如下：

/*************************************************************************
>FileName:Win_Server.c
>Author:SongLee
************************************************************************/

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<WinSock2.h>

#definePORT8087
#defineSERVER_IP"127.0.0.1"
#defineBUFFER_SIZE1024
#defineFILE_NAME_MAX_SIZE512
#pragmacomment(lib,"WS2_32")

intmain()
{
//声明并初始化一个服务端(本地)的地址结构
sockaddr_inserver_addr;
server_addr.sin_family=AF_INET;
server_addr.sin_addr.S_un.S_addr=INADDR_ANY;
server_addr.sin_port=htons(PORT);

//初始化socketdll
WSADATAwsaData;
WORDsocketVersion=MAKEWORD(2,0);
if(WSAStartup(socketVersion,&wsaData)!=0)
{
printf("Initsocketdllerror!");
exit(1);
}

//创建socket
SOCKETm_Socket=socket(AF_INET,SOCK_STREAM,0);
if(SOCKET_ERROR==m_Socket)
{
printf("CreateSocketError!");
exit(1);
}

//绑定socket和服务端(本地)地址
if(SOCKET_ERROR==bind(m_Socket,(LPSOCKADDR)&server_addr,sizeof(server_addr)))
{
printf("ServerBindFailed:%d",WSAGetLastError());
exit(1);
}

//监听
if(SOCKET_ERROR==listen(m_Socket,10))
{
printf("ServerListenFailed:%d",WSAGetLastError());
exit(1);
}


while(1)
{
printf("ListeningToClient...\n");

sockaddr_inclient_addr;
intclient_addr_len=sizeof(client_addr);

SOCKETm_New_Socket=accept(m_Socket,(sockaddr*)&client_addr,&client_addr_len);
if(SOCKET_ERROR==m_New_Socket)
{
printf("ServerAcceptFailed:%d",WSAGetLastError());
break;
}

charbuffer[BUFFER_SIZE];
memset(buffer,0,BUFFER_SIZE);
if(recv(m_New_Socket,buffer,BUFFER_SIZE,0)<0)
{
printf("ServerReceiveDataFailed!");
break;
}

charfile_name[FILE_NAME_MAX_SIZE+1];
memset(file_name,0,FILE_NAME_MAX_SIZE+1);
strncpy(file_name,buffer,strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buffer));
printf("%s\n",file_name);

FILE*fp=fopen(file_name,"rb");//windows下是"rb",表示打开一个只读的二进制文件
if(NULL==fp)
{
printf("File:%sNotFound\n",file_name);
}
else
{
memset(buffer,0,BUFFER_SIZE);
intlength=0;

while((length=fread(buffer,sizeof(char),BUFFER_SIZE,fp))>0)
{
if(send(m_New_Socket,buffer,length,0)<0)
{
printf("SendFile:%sFailed\n",file_name);
break;
}
memset(buffer,0,BUFFER_SIZE);
}

fclose(fp);
printf("File:%sTransferSuccessful!\n",file_name);
}
closesocket(m_New_Socket);
}

closesocket(m_Socket);
//释放winsock库
WSACleanup();
return0;
}

Client端代码如下：

/*************************************************************************
>FileName:Win_Client.c
>Author:SongLee
************************************************************************/

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<WinSock2.h>

#definePORT8087
#defineSERVER_IP"127.0.0.1"
#defineBUFFER_SIZE1024
#defineFILE_NAME_MAX_SIZE512
#pragmacomment(lib,"WS2_32")

intmain()
{
//初始化socketdll
WSADATAwsaData;
WORDsocketVersion=MAKEWORD(2,0);
if(WSAStartup(socketVersion,&wsaData)!=0)
{
printf("Initsocketdllerror!");
exit(1);
}

//创建socket
SOCKETc_Socket=socket(AF_INET,SOCK_STREAM,0);
if(SOCKET_ERROR==c_Socket)
{
printf("CreateSocketError!");
system("pause");
exit(1);
}

//指定服务端的地址
sockaddr_inserver_addr;
server_addr.sin_family=AF_INET;
server_addr.sin_addr.S_un.S_addr=inet_addr(SERVER_IP);
server_addr.sin_port=htons(PORT);

if(SOCKET_ERROR==connect(c_Socket,(LPSOCKADDR)&server_addr,sizeof(server_addr)))
{
printf("CanNotConnectToServerIP!\n");
system("pause");
exit(1);
}

//输入文件名
charfile_name[FILE_NAME_MAX_SIZE+1];
memset(file_name,0,FILE_NAME_MAX_SIZE+1);
printf("PleaseInputFileNameOnServer:");
scanf("%s",&file_name);

charbuffer[BUFFER_SIZE];
memset(buffer,0,BUFFER_SIZE);
strncpy(buffer,file_name,strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name));

//向服务器发送文件名
if(send(c_Socket,buffer,BUFFER_SIZE,0)<0)
{
printf("SendFileNameFailed\n");
system("pause");
exit(1);
}

//打开文件，准备写入
FILE*fp=fopen(file_name,"wb");//windows下是"wb",表示打开一个只写的二进制文件
if(NULL==fp)
{
printf("File:%sCanNotOpenToWrite\n",file_name);
system("pause");
exit(1);
}
else
{
memset(buffer,0,BUFFER_SIZE);
intlength=0;
while((length=recv(c_Socket,buffer,BUFFER_SIZE,0))>0)
{
if(fwrite(buffer,sizeof(char),length,fp)<length)
{
printf("File:%sWriteFailed\n",file_name);
break;
}
memset(buffer,0,BUFFER_SIZE);
}

printf("ReceiveFile:%sFromServerSuccessful!\n",file_name);
}

fclose(fp);
closesocket(c_Socket);

//释放winsock库
WSACleanup();

system("pause");
return0;
}

Windows网络编程之winsock实现文件传输示例

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