基于TCP流协议的socket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: Server.c
- > Author: SongLee
- > E-mail: lisong.shine@qq.com
- > Created Time: 2014年03月13日 星期四 22时17分43秒
- > Personal Blog: http://songlee24.github.io/
- ************************************************************************/
- #include<netinet/in.h> // sockaddr_in
- #include<sys/types.h> // socket
- #include<sys/socket.h> // socket
- #include<stdio.h> // printf
- #include<stdlib.h> // exit
- #include<string.h> // bzero
- #define SERVER_PORT 8000
- #define LENGTH_OF_LISTEN_QUEUE 20
- #define BUFFER_SIZE 1024
- #define FILE_NAME_MAX_SIZE 512
- int main(void)
- {
- // 声明并初始化一个服务器端的socket地址结构
- struct sockaddr_in server_addr;
- bzero(&server_addr, sizeof(server_addr));
- server_addr.sin_family = AF_INET;
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);
- server_addr.sin_port = htons(SERVER_PORT);
- // 创建socket,若成功,返回socket描述符
- int server_socket_fd = socket(PF_INET, SOCK_STREAM, 0);
- if(server_socket_fd < 0)
- {
- perror("Create Socket Failed:");
- exit(1);
- }
- int opt = 1;
- setsockopt(server_socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
- // 绑定socket和socket地址结构
- if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr))))
- {
- perror("Server Bind Failed:");
- exit(1);
- }
- // socket监听
- if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE)))
- {
- perror("Server Listen Failed:");
- exit(1);
- }
- while(1)
- {
- // 定义客户端的socket地址结构
- struct sockaddr_in client_addr;
- socklen_t client_addr_length = sizeof(client_addr);
- // 接受连接请求,返回一个新的socket(描述符),这个新socket用于同连接的客户端通信
- // accept函数会把连接到的客户端信息写到client_addr中
- int new_server_socket_fd = accept(server_socket_fd, (struct sockaddr*)&client_addr, &client_addr_length);
- if(new_server_socket_fd < 0)
- {
- perror("Server Accept Failed:");
- break;
- }
- // recv函数接收数据到缓冲区buffer中
- char buffer[BUFFER_SIZE];
- bzero(buffer, BUFFER_SIZE);
- if(recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0) < 0)
- {
- perror("Server Recieve Data Failed:");
- break;
- }
- // 然后从buffer(缓冲区)拷贝到file_name中
- char file_name[FILE_NAME_MAX_SIZE+1];
- bzero(file_name, 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);
- // 打开文件并读取文件数据
- FILE *fp = fopen(file_name, "r");
- if(NULL == fp)
- {
- printf("File:%s Not Found\n", file_name);
- }
- else
- {
- bzero(buffer, BUFFER_SIZE);
- int length = 0;
- // 每读取一段数据,便将其发送给客户端,循环直到文件读完为止
- while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
- {
- if(send(new_server_socket_fd, buffer, length, 0) < 0)
- {
- printf("Send File:%s Failed./n", file_name);
- break;
- }
- bzero(buffer, BUFFER_SIZE);
- }
- // 关闭文件
- fclose(fp);
- printf("File:%s Transfer Successful!\n", file_name);
- }
- // 关闭与客户端的连接
- close(new_server_socket_fd);
- }
- // 关闭监听用的socket
- close(server_socket_fd);
- return 0;
- }
- /*************************************************************************
- > File Name: Client.c
- > Author: SongLee
- > E-mail: lisong.shine@qq.com
- > Created Time: 2014年03月14日 星期五 09时41分46秒
- > Personal Blog: http://songlee24.github.io/
- ************************************************************************/
- #include<netinet/in.h> // sockaddr_in
- #include<sys/types.h> // socket
- #include<sys/socket.h> // socket
- #include<stdio.h> // printf
- #include<stdlib.h> // exit
- #include<string.h> // bzero
- #define SERVER_PORT 8000
- #define BUFFER_SIZE 1024
- #define FILE_NAME_MAX_SIZE 512
- int main()
- {
- // 声明并初始化一个客户端的socket地址结构
- struct sockaddr_in client_addr;
- bzero(&client_addr, sizeof(client_addr));
- client_addr.sin_family = AF_INET;
- client_addr.sin_addr.s_addr = htons(INADDR_ANY);
- client_addr.sin_port = htons(0);
- // 创建socket,若成功,返回socket描述符
- int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0);
- if(client_socket_fd < 0)
- {
- perror("Create Socket Failed:");
- exit(1);
- }
- // 绑定客户端的socket和客户端的socket地址结构 非必需
- if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr))))
- {
- perror("Client Bind Failed:");
- exit(1);
- }
- // 声明一个服务器端的socket地址结构,并用服务器那边的IP地址及端口对其进行初始化,用于后面的连接
- struct sockaddr_in server_addr;
- bzero(&server_addr, sizeof(server_addr));
- server_addr.sin_family = AF_INET;
- if(inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) == 0)
- {
- perror("Server IP Address Error:");
- exit(1);
- }
- server_addr.sin_port = htons(SERVER_PORT);
- socklen_t server_addr_length = sizeof(server_addr);
- // 向服务器发起连接,连接成功后client_socket_fd代表了客户端和服务器的一个socket连接
- if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0)
- {
- perror("Can Not Connect To Server IP:");
- exit(0);
- }
- // 输入文件名 并放到缓冲区buffer中等待发送
- char file_name[FILE_NAME_MAX_SIZE+1];
- bzero(file_name, FILE_NAME_MAX_SIZE+1);
- printf("Please Input File Name On Server:\t");
- scanf("%s", file_name);
- char buffer[BUFFER_SIZE];
- bzero(buffer, BUFFER_SIZE);
- strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name));
- // 向服务器发送buffer中的数据
- if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0)
- {
- perror("Send File Name Failed:");
- exit(1);
- }
- // 打开文件,准备写入
- FILE *fp = fopen(file_name, "w");
- if(NULL == fp)
- {
- printf("File:\t%s Can Not Open To Write\n", file_name);
- exit(1);
- }
- // 从服务器接收数据到buffer中
- // 每接收一段数据,便将其写入文件中,循环直到文件接收完并写完为止
- bzero(buffer, BUFFER_SIZE);
- int length = 0;
- while((length = recv(client_socket_fd, buffer, BUFFER_SIZE, 0)) > 0)
- {
- if(fwrite(buffer, sizeof(char), length, fp) < length)
- {
- printf("File:\t%s Write Failed\n", file_name);
- break;
- }
- bzero(buffer, BUFFER_SIZE);
- }
- // 接收成功后,关闭文件,关闭socket
- printf("Receive File:\t%s From Server IP Successful!\n", file_name);
- close(fp);
- close(client_socket_fd);
- return 0;
- }