windows网络编程（二）——传送图片

客户端

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <WinSock2.h>



#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll
int main(){

	FILE*p = fopen("C:\\Users\\Administrator\\Desktop\\1.PNG","rb+");
	if (!p)return 0;

	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);
	//创建套接字
	SOCKET sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
	//向服务器发起请求
	sockaddr_in sockAddr;
	memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
	sockAddr.sin_family = PF_INET;
	sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
	sockAddr.sin_port = htons(1234);
	connect(sock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
	//接收服务器传回的数据
	char szBuffer[MAXBYTE] = { 0 };

	char test[100] = "abc";
	int readcount = 0;
	recv(sock, szBuffer, MAXBYTE, NULL);
	printf("Message form server: %s\n", szBuffer);
	while ((readcount=fread(test, 1, 99, p))>0)
	{
		send(sock, test, readcount, NULL);
		//printf("已发送：%s\n", test);
	}
	//recv(sock, szBuffer, MAXBYTE, NULL);
	//printf("Message form server: %s\n", szBuffer);
	shutdown(sock, SD_SEND);//置于内部
	//关闭套接字
	
	//终止使用 DLL
	WSACleanup();
	system("pause");
	return 0;
}

服务器端

#include <stdio.h>
#include <winsock2.h>
#pragma comment (lib, "ws2_32.lib")  //加载 ws2_32.dll
#define BUF_SIZE 100
int main(){
	FILE*p = fopen("C:\\Users\\Administrator\\Desktop\\recept.PNG", "wb+");

	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);
	//创建套接字
	SOCKET servSock = socket(AF_INET, SOCK_STREAM, 0);
	//绑定套接字
	sockaddr_in sockAddr;
	memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
	sockAddr.sin_family = PF_INET;  //使用IPv4地址
	sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的IP地址
	sockAddr.sin_port = htons(1234);  //端口
	bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
	//进入监听状态
	listen(servSock, 1000);
	//接收客户端请求
	SOCKADDR clntAddr;
	int nSize = sizeof(SOCKADDR);
	char buffer[BUF_SIZE] = { 0 };  //缓冲区
	int len;
	//while (1)	
	SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);
	send(clntSock, "输出开始！", 20, 0);
	while ((len = recv(clntSock, buffer, BUF_SIZE-1, NULL))>0)//避免服务器和客户端在同一时间段，同时recv
	{
		//send(clntSock, buffer, BUF_SIZE, NULL);
		fwrite(buffer, 1, len, p);
		
		memset(buffer, 0, BUF_SIZE);
	}

	//关闭套接字	
	closesocket(servSock);

	//终止 DLL 的使用
	WSACleanup();
	system("pause");
	return 0;
}