windows tcp 多线程server端断开

 

//< >引用的是编译器的类库路径里面的头文件
//" "引用的是你程序目录的相对路径中的头文件
#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include <string.h>

//添加默认链接库
#pragma comment(lib,"ws2_32.lib")

#define PORT 9999
#define IPADDR "127.0.0.1"
#define BACKLOG 20
#define FILENAME 200
#define LENGTH 200
#define BUFFERSIZE 1024

struct FILEHEAD //文件信息结构
{
char path_buffer[LENGTH];//文件绝对路径加完整名
char filename[LENGTH];//文件名
char ext[LENGTH];//文件扩展名
unsigned int length;//文件长度

};

FILEHEAD file; //全局文件信息头
struct sockaddr_in clientaddr; //定义外部变量供线程函数调用

//得到文件头信息,使用全局变量函数没有参数
void getFileInformation()
{
printf( "file information :\n" );
//printf( " Drive: %s\n", drive );
//printf( " Dir: %s\n", dir );
printf( " Filename: %s\n", file.filename );
printf( " Ext: %s\n", file.ext );
printf( " length is btye: %ld btye\n", file.length );
}

void showClientinfo()
{
//获取当前系统时间
SYSTEMTIME st;
GetLocalTime(&st);
char SysDate[30];

//将systime中的时间转变为字符串存入SysDate[30];
sprintf(SysDate, "%4d-%2d-%2d %2d:%2d:%2d", st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
//Server显示客户端信息
printf("%s Recv from Client [%s:%d] : %s\n", SysDate, inet_ntoa(clientaddr.sin_addr), ntohs(clientaddr.sin_port));
//服务器向客户端回显信息
}

DWORD WINAPI RequestThread(LPVOID lparam)//线程函数，并发接收请求
{
SOCKET newsock = (SOCKET)(LPVOID)lparam;
char buf[BUFFERSIZE]={0};//接收缓冲区
memset(buf,0,BUFFERSIZE);//缓冲区清零

showClientinfo();//显示连接信息

printf("等待接收文件头信息...\n");
int length_file_info=recv(newsock,(char *)&file,BUFFERSIZE,0);
if (length_file_info == SOCKET_ERROR)
{
printf("recv failed !\n");
closesocket(newsock);
WSACleanup();
return -1;
}

if (length_file_info<=0)
{
exit(0);//没有成功接收文件头信息
}

getFileInformation();//打印文件信息

//拼接文件名为receive.文件后缀
char *s="receive";
memset(file.filename,0,LENGTH);
strcpy(file.filename,s);
strcat(file.filename,file.ext);

FILE *fp=NULL;
fp=fopen(file.filename,"wb+");
if (NULL==fp)
{
perror("fail to build the file!!!\n");
exit(0);
}

printf("要接收的文件名为：");
printf(file.filename);//打印文件名
printf ("\n catch file now....\n");

int relength=0;//接收到字节的长度

Sleep(500);

printf("开始接收...\n");

while (1)
{
relength=recv(newsock,buf,BUFFERSIZE,0);
if (relength == SOCKET_ERROR) {
printf("recv failed !\n");
closesocket(newsock);
WSACleanup();
return -1;
}

fwrite(buf,1,relength,fp);
if (0==relength)
{
break;
}
printf(".");
}
printf("\n接收完成...\n");

fflush(fp);
fclose(fp);
fp=NULL;

return 0;

}

int main(int argc,char *argv[])
{
//初始化winsock版本信息，加载动态链接库(dll)
WSADATA wsData;
if (WSAStartup(MAKEWORD(2,2),&wsData)!=0)
{
printf("WSAStartup failed !!!\n");
return -1;
}

//创建监听套接字
SOCKET socklisten;
if((socklisten=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET)
{
printf("socket failed!!!\n");
WSACleanup();
return -1;
}

//设置服务器地址
struct sockaddr_in servaddr;

memset(&servaddr,0,sizeof(servaddr));
servaddr.sin_family=AF_INET;
servaddr.sin_port=htons(9999);
servaddr.sin_addr.S_un.S_addr=inet_addr(IPADDR);

//绑定socket地址结构到监听套接字
if (bind(socklisten,(sockaddr *)&servaddr,sizeof(servaddr))!=0)
{
printf("binding failed!!!\n");
closesocket(socklisten);
WSACleanup();
}

//在server上运行监听
if (listen(socklisten,20)!=0)
{
printf("listen failed !!!\n");
closesocket(socklisten);
WSACleanup();
return -1;
}

//接收客户端的连接请求
printf("TCP server is start!!!\n");

//clientaddrlength要有初值，
int client_addr_length = sizeof(clientaddr);
memset(&clientaddr,0,client_addr_length);
SOCKET connect;

//循环等待
while (1)
{
if ((connect=accept(socklisten,(sockaddr *)&clientaddr,&client_addr_length))==INVALID_SOCKET)
{
printf("accept failed!!\n");
closesocket(connect);
WSACleanup();
return -1;
}

//创建新线程
DWORD ThreadID;
CreateThread(NULL,0,RequestThread,(LPVOID)connect,0,&ThreadID);
}

 

}

 

#include <stdio.h>
#include <windows.h>
#include <stdlib.h>

#define FILENAME 200
#define BUFFER 1024
#define PORT 9999

#pragma comment(lib, "ws2_32.lib")

#define LENGTH 200

struct FILEHEAD //文件信息结构
{
char path_buffer[LENGTH]; //文件绝对路径
char filename[LENGTH]; //文件名
char ext[LENGTH]; //文件扩展名
unsigned int length; //文件长度

};

FILEHEAD file;

void setFileInformation()
{
memset(&file,0,sizeof(FILEHEAD));

//_makepath( path_buffer, "c", "\\sample\\crt\\", "makepath", "c" );
printf( "input the path and name : \n");
scanf("%s",file.path_buffer);
_splitpath( file.path_buffer, NULL, NULL, file.filename, file.ext );

FILE *fp= NULL;
fp=fopen(file.path_buffer,"r");
if (NULL==fp)
{
printf("cannot open the %s \n",file.path_buffer);
exit(0);
}

fseek(fp,0l,SEEK_END);
file.length=ftell(fp);

//fclose(fp);
//fp = NULL; //需要指向空，否则会指向原打开文件地址

printf( "file head information:\n" );
//printf( " Drive: %s\n", drive );
//printf( " Dir: %s\n", dir );
printf( " Filename: %s\n", file.filename );
printf( " Ext: %s\n", file.ext );
printf( " length is btye: %ld btye\n", file.length );
}

 

int main(int argc, char *argv[])
{
WSADATA wsadata;
WSAStartup(MAKEWORD(2,0),&wsadata);
SOCKET sock_trans=socket(AF_INET,SOCK_STREAM,0);

if (sock_trans==0)
{
printf ("socket build faile!!\n");
exit(1);
}

printf ("target pc's IP address: 127.0.0.1\n");

//如果正式调试，将服务器端ip写死。

SOCKADDR_IN sockadd;
sockadd.sin_family=AF_INET;
sockadd.sin_port=htons(PORT);
sockadd.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");

int con_info=connect(sock_trans,(SOCKADDR*)&sockadd,sizeof(sockadd));

if (con_info==SOCKET_ERROR)
{
printf ("connect fail!\n");
//exit(2);
}

Sleep(1000);

setFileInformation();

FILE *fp;
fp=fopen(file.path_buffer,"rb");
if (fp==NULL)
{
perror("\nopen file error:");
exit(1);
}

//freed_return_val=fread(buf,1,1024,fp);//读文件字符
char buf[BUFFER];
int fread_return_val=0;//文件读出字符的返回值

//发送文件头信息
printf("发送文件头信息...\n");
send(sock_trans,(char *)&file,sizeof(file),0);

printf("发送文件信息...\n");
while (1)
{
fread_return_val=fread(buf,1,1024,fp);
if (0==fread_return_val)
{
break;
}
//freed_return_val=fread(buf,1,1024,fp);
send(sock_trans,buf,fread_return_val,0);
printf(".");
}

fclose(fp);

closesocket(sock_trans);
WSACleanup();
printf("\n发送完成...\n");

return 0;

}