项目功能
服务器相关
1.获取服务器文件，get xxx
2.展示服务器有哪些文件 ，ls
3.进入服务器文件夹 cd
4.上传文件到服务器
客户端相关
lls查看客户端本地文件
lcd 进入客户端xx文件夹
lpwd 查看客户端当前目录
项目代码
客户端代码（代码较长，懒得分文件编了）
已上传资源，需要可以下载一波
https://download.csdn.net/download/qq_52749711/88233816
部分服务器代码
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <fcntl.h>
#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 8888
#define RECV_MAX_LEN 128
#define SEND_MAX_LEN 4096
#define LS 0
#define LL 1
#define CD 2
#define PWD 3
#define QUIT 4
#define GET 5
//………………………………省略处理命令的代码
int is_command(char *buf)
{
printf("buf = %s\n",buf);
char *token = strtok(buf, " ");
char *ptr = token;
printf("ptr = %s\n",ptr);
if(!strcmp(ptr,"ls")) return LS;
if(!strcmp(ptr,"ll")) return LL;
if(!strcmp(ptr,"pwd")) return PWD;
if(!strcmp(ptr,"cd")) return CD;
if(!strcmp(ptr,"get")) return GET;
if(!strcmp(ptr,"quit")) return QUIT;
return -1;
}
void client_handler(int client_sockfd,int client_pid)
{
char *buffer = NULL;
char *buffer_err = NULL;
int i = 0;
int cmd = 0;
//开辟接收需要的空间
buffer = (char *)malloc(sizeof(char) * RECV_MAX_LEN);
if(buffer == NULL){
printf("recv malloc fail\n");
exit(-1);
}
while(1){
memset(buffer,'\0',RECV_MAX_LEN);
if(recv(client_sockfd, buffer, RECV_MAX_LEN, 0) > 0){
//调试信息
printf("from client msg:%s\n",buffer);
//调用函数判断是否有此命令
if((cmd = is_command(buffer)) < 0){
//申请错误信息空间，存放错误信息
buffer_err = (char *)malloc(sizeof(char) * RECV_MAX_LEN + 100);
sprintf(buffer_err,"command:\" %s \",not found\nyour try :ls ll cd get……\n",buffer);
//发送错误信息给客户端
send(client_sockfd, buffer_err, strlen(buffer_err), 0);
//释放空间防止泄露
free(buffer_err);
buffer_err = NULL;
}
//处理命令函数，并如果是退出命令则break退出进程
if(command_handler(client_sockfd,cmd) == QUIT) {
free(buffer);
buffer = NULL;
close(client_sockfd);
break;
}
}
}
printf("\nclient %d quit.\n",client_pid);
}
//主函数
int main()
{
struct sockaddr_in server_addr;
int sockfd;
int client_sockfd;
struct sockaddr_in client_address;
socklen_t client_len = sizeof(client_address);
int count = 0;
//int socket(int domain, int type, int protocol);
// 创建套接字
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
perror("server sockt runing fail\n");
exit(EXIT_FAILURE);
}
//清空servoer_addr内存
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(SERVER_PORT);
server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
//绑定端口
if ((bind(sockfd, (struct sockaddr*) &server_addr, sizeof(server_addr))) < 0) {
perror("server bind fail\n");
exit(EXIT_FAILURE);
}
//监听
if (listen(sockfd, 10) < 0) {
perror("监听失败");
exit(EXIT_FAILURE);
}
// int client_sockfd;
// struct sockaddr_in client_address;
// socklen_t client_len = sizeof(client_address);
while(1){
printf("wait client accept……\nnow client count is %d\nyou can use Ctrl+C to Stop Server\n",count++);
client_sockfd = accept(sockfd, (struct sockaddr *)&client_address, &client_len);
if (client_sockfd < 0) {
perror("连接失败,联系客服解决");
}else{
//子进程处理客户端请求
if(fork() == 0){
client_handler(client_sockfd,getpid());
exit(0);
}else{
}
}
}
return 0;
}
客户端代码
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#define SERVER_IP 127.0.0.1
#define SERVER_PORT 8888
#define SEND_MAX_LEN 128
#define RECV_MAX_LEN 4096
//本地命令
int is_command(char *send_buf)
{
char lcd_path[128];
if(!strcmp(send_buf,"lls")){
system("ls");
return 1;
}
if(!strcmp(send_buf,"lcd")){
memset(lcd_path,'\0',128);
scanf("%s",lcd_path);
//切换当前工作路径函数
chdir(lcd_path);
system("pwd");
return 1;
}
if(!strcmp(send_buf,"lpwd")){
system("pwd");
return 1;
}
return 0;
}
int main()
{
struct sockaddr_in server_address;
int sockfd;
int pid = getpid();
char *send_buf = NULL;
char *recv_buf = NULL;
int get_filefd; //get命令的文件标识
int get_flag = 0; //get命令flag
char get_path[32]; //get命令文件名
sockfd = socket(AF_INET, SOCK_STREAM, 0);
memset(&server_address, 0, sizeof(server_address));
server_address.sin_family = AF_INET;
server_address.sin_port = htons(SERVER_PORT);
server_address.sin_addr.s_addr = inet_addr("127.0.0.1");
// connect是阻塞函数，它会等待服务器的响应
// 返回值为0表示连接成功，-1表示连接失败
if (connect(sockfd, (struct sockaddr *) &server_address, sizeof(server_address)) < 0) {
perror("连接失败");
exit(EXIT_FAILURE);
}else{
printf("连接成功\r\n");
send_buf = (char *)malloc(sizeof(char)*SEND_MAX_LEN);
recv_buf = (char *)malloc(sizeof(char)*RECV_MAX_LEN);
while(1){
memset(send_buf,'\0',SEND_MAX_LEN);
memset(recv_buf,'\0',RECV_MAX_LEN);
printf("\ninput cmd:");
scanf("%s",send_buf);
//判断是否为本地命令
if(is_command(send_buf) == 0){
send(sockfd, send_buf, strlen(send_buf), 0);
int re = recv(sockfd, recv_buf, RECV_MAX_LEN, 0);
//printf("->%s\nre = %d\n",recv_buf,re);
//当我输入get之后第二个参数一定是文件名，捕获文件名创建
if(get_flag == 1){
sprintf(get_path,"./%s",send_buf);
printf("get_path=%s\n",get_path);
get_filefd = open((const char *)get_path,O_CREAT|O_RDWR|O_EXCL,0666);
if(get_filefd == -1 ){
printf("\ncreate file fail or file exist \n");
get_flag = 0;
}else{
lseek(get_filefd,0,SEEK_SET);
//将数据写入文件
write(get_filefd,recv_buf,strlen(recv_buf));
close(get_filefd);
get_flag = 0;
}
}
printf("\nmsg from server\n##################\n%s\n##################\n\n",recv_buf);
if(!strcmp(send_buf,"get")) get_flag = 1;
if(!strcmp(recv_buf,"quit")){
free(send_buf);
free(recv_buf);
send_buf = NULL;
recv_buf = NULL;
break;
}
}//is_command
}//while(1)
}
close(sockfd);
return 0;
}
结束
如有问题，欢迎提出，共同进步