Windows网络编程：winsock文件传输范例

基于TCP流协议的winsock网络文件传输Demo：

实现：C语言
功能：文件传输（可以传任何格式的文件）

/*************************************************************************
	> File Name: Win_Server.c
	> Author: SongLee
	> E-mail: lisong.shine@qq.com 
	> Created Time: 2014年03月16日 星期日 19时43分44秒
    > Personal Blog: http://songlee24.github.io/
 ************************************************************************/

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

#define PORT 8087
#define SERVER_IP "127.0.0.1"
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
#pragma comment(lib, "WS2_32")

int main()
{
	// 声明并初始化一个服务端(本地)的地址结构
	sockaddr_in server_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socket dll
	WSADATA wsaData;
        WORD socketVersion = MAKEWORD(2, 0);
	if(WSAStartup(socketVersion, &wsaData) != 0)
	{
		printf("Init socket dll error!");
		exit(1);
	}

	// 创建socket
	SOCKET m_Socket = socket(AF_INET, SOCK_STREAM, 0);
        if (SOCKET_ERROR == m_Socket)
        {
	        printf("Create Socket Error!");
		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("Server Bind Failed: %d", WSAGetLastError());
		exit(1);
	}

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


	while(1)
	{
		printf("Listening To Client...
");

		sockaddr_in client_addr;
		int client_addr_len = sizeof(client_addr);

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

                char buffer[BUFFER_SIZE];
                memset(buffer, 0, BUFFER_SIZE);
		if (recv(m_New_Socket, buffer, BUFFER_SIZE, 0) < 0)
		{
			printf("Server Receive Data Failed!");
			break;
		}

		char file_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
", 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: %s Not Found
", file_name);
		}
                else
		{
			memset(buffer, 0, BUFFER_SIZE);
			int length = 0;

			while ((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
			{
				if (send(m_New_Socket, buffer, length, 0) < 0)
				{
					printf("Send File: %s Failed
", file_name);
					break;
				}
				memset(buffer, 0, BUFFER_SIZE);
			}

			fclose(fp);
			printf("File: %s Transfer Successful!
", file_name);
		}
		closesocket(m_New_Socket);
	}

	closesocket(m_Socket);
	//释放winsock库
	WSACleanup();
	return 0;
}

/*************************************************************************
	> File Name: Win_Client.c
	> Author: SongLee
	> E-mail: lisong.shine@qq.com 
	> Created Time: 2014年03月16日 星期日 20时12分10秒
    > Personal Blog: http://songlee24.github.io/
 ************************************************************************/

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

#define PORT 8087
#define SERVER_IP "127.0.0.1"
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
#pragma comment(lib, "WS2_32")

int main()
{
	// 初始化socket dll
	WSADATA wsaData;
	WORD socketVersion = MAKEWORD(2, 0);
	if(WSAStartup(socketVersion, &wsaData) != 0)
	{
		printf("Init socket dll error!");
		exit(1);
	}

	//创建socket
	SOCKET c_Socket = socket(AF_INET, SOCK_STREAM, 0);
	if (SOCKET_ERROR == c_Socket)
	{
		printf("Create Socket Error!");
		system("pause");
		exit(1);
	}

	//指定服务端的地址
	sockaddr_in server_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("Can Not Connect To Server IP!
");
		system("pause");
		exit(1);
	}

	//输入文件名
        char file_name[FILE_NAME_MAX_SIZE+1];
	memset(file_name, 0, FILE_NAME_MAX_SIZE+1);
	printf("Please Input File Name On Server: ");
	scanf("%s", &file_name);

	char buffer[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("Send File Name Failed
");
		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: %s Can Not Open To Write
", file_name);
		system("pause");
		exit(1);
	}
	else
	{
		memset(buffer, 0, BUFFER_SIZE);
		int length = 0;
		while ((length = recv(c_Socket, buffer, BUFFER_SIZE, 0)) > 0)
		{
			if (fwrite(buffer, sizeof(char), length, fp) < length)
			{
				printf("File: %s Write Failed
", file_name);
				break;
			}
			memset(buffer, 0, BUFFER_SIZE);
		}

		printf("Receive File: %s From Server Successful!
", file_name);
	}

	fclose(fp);
	closesocket(c_Socket);
	
	//释放winsock库
	WSACleanup();

	system("pause");
	return 0;
}