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service

/************************************************************************* 
  > File Name: Server.c 
  > Author: Zhao Yun
 ************************************************************************/
  
#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) 
			{ 
				printf ("%s", buffer);
				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; 
} 

client

/************************************************************************* 
  > File Name: Client.c 
  > Author: Zhao Yun
 ************************************************************************/
  
#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; 
} 

 

上传文件

service

/************************************************************************* 
  > File Name: Server.c 
  > Author: Zhao Yun 
 ************************************************************************/
  
#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, "w"); 
		if(NULL == fp) 
		{ 
			printf("File:%s Not Found\n", file_name); 
		} 
		else
		{ 
			bzero(buffer, BUFFER_SIZE); 
			int length = 0; 
			// 从客户端接收数据到buffer中 new_server_socket_fd
			// 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
			while((length = recv(new_server_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);
			} 

			// 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; 
} 

client

/************************************************************************* 
  > File Name: Client.c 
  > Author: Zhao Yun
 ************************************************************************/
  
#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, "r"); 
	if(NULL == fp) 
	{ 
		printf("File:\t%s Can Not Open To Write\n", file_name); 
		exit(1); 
	} 

	bzero(buffer, BUFFER_SIZE); 
	int length = 0; 

	while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0) 
	{ 
		printf ("%s\n", buffer);
		if(send(client_socket_fd, buffer, length, 0) < 0) 
		{ 
			printf("Send File:%s 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; 
}