WINSOCK 传送文件

SERVER:

// send_server.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")

int main(int argc,char** argv)
{
	WSADATA wsadata;
	if (WSAStartup(MAKEWORD(2,2),&wsadata) == -1)
	{
		printf("wsastartup error\r\n");
	}

	SOCKET server;
	server = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if (server == SOCKET_ERROR)
	{
		printf("server socket start error\r\n");
		return 0;
	}

	sockaddr_in server_service;
	server_service.sin_family = AF_INET;
	server_service.sin_port = htons(8000);
	server_service.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

	if (bind(server,(sockaddr*)&server_service,sizeof(server_service)) == SOCKET_ERROR)
	{
		printf("Bind Port error\r\n");
		return 0;
	}

	if (listen(server,5) == SOCKET_ERROR)
	{
		printf("Listen client error\r\n");
		return 0;
	}

	SOCKET acceptsocket;
	printf("wait accept recv data\r\n");
	while (1)
	{
		acceptsocket = SOCKET_ERROR;
		while (acceptsocket == SOCKET_ERROR)
		{
			acceptsocket = accept(server,NULL,NULL);

		}
		printf("Client connetcd\r\n");
		server = acceptsocket;
		break;
	}

	char sendbuf[1024] = {0};
	DWORD dwread;
	BOOL bret;
	char filename[] = "test.exe";
	HANDLE hfile = CreateFileA(filename,GENERIC_READ,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
	while (true)
	{
		bret = ReadFile(hfile,sendbuf,1024,&dwread,NULL);
		if (bret == false)
		{
			printf("read file error\r\n");
			break;
		}
		else if (dwread == 0)
		{
			printf("send file ok");
			break;
		}else
		{
			send(server,sendbuf,dwread,0);
		}
	}
	CloseHandle(hfile);
	WSACleanup();
	return 0;
}

CLIENT:

// send_client.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdio.h>
#include <WinSock2.h>
#pragma comment(lib,"ws2_32.lib")

int main()
{
	WSADATA wsadata;
	int iResult = WSAStartup(MAKEWORD(2,2),&wsadata);
	if (iResult != NO_ERROR)
	{
		printf("Errpr at wsastartup\r\n");
	}
	SOCKET client;
	client = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if (client == INVALID_SOCKET)
	{
		printf("error at socket():%ld\r\n",WSAGetLastError());
		WSACleanup();
		return 0;
	}

	sockaddr_in clientService;
	clientService.sin_family = AF_INET;
	clientService.sin_port = htons(8000);
	clientService.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

	if (connect(client,(SOCKADDR*)&clientService,sizeof(clientService)) == SOCKET_ERROR)
	{
		printf("Faied to error\r\n");
		WSACleanup();
		return 0;
	}

	char recvbuf[1024] = {0};
	int read;
	DWORD dwWrite;
	BOOL bRet;
	char filename[] = "test.exe";
	HANDLE hfile = CreateFileA(filename,GENERIC_WRITE,0,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);

	while (true)
	{
		read = recv(client,recvbuf,1024,0);
		if (read ==-1)
		{
			break;
		}
		bRet = WriteFile(hfile,recvbuf,read,&dwWrite,NULL);

		if (bRet == FALSE)
		{
			MessageBoxW(NULL,_T("Write buffer error\r\n"),NULL,MB_OK);
		}
	}
	MessageBoxW(NULL,_T("write buffer susccess\r\n"),NULL,MB_OK);
	return 0;
}

在发送文件之前，我们可以利用getfilesize来获取文件打开的大小。