Windows网络编程之winsock实现文件传输示例

#include #include #include #include

#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...\n");

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\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: %s Not Found\n", 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\n", file_name);break;}memset(buffer, 0, BUFFER_SIZE);}

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

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

#include #include #include #include

#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!\n");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\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: %s Can Not Open To Write\n", 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\n", file_name);break;}memset(buffer, 0, BUFFER_SIZE);}

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

fclose(fp);closesocket(c_Socket);

//释放winsock库WSACleanup();

system("pause");return 0;}