一、项目要求:
1.登录注册功能,不能重复登录,重复注册。用户信息也存储在数据库中。
2.单词查询功能
3.历史记录功能,存储单词,意思,以及查询时间,存储在数据库
4.基于TCP,支持多客户端连接
5.采用数据库保存用户信息与历史记录
6.将dict.txt的数据导入到数据库中保存。
7.返回上级、按下ctrl+c退出客户端后,该用户退出登录
二、格式要求:
1.main函数只跑逻辑,不允许跑功能代码
2.功能代码封装成函数
三、项目功能:
1.注册
2.登录
3.查询单词
4.查看历史记录
5.退出登录
四、框架设计:
4.1服务器设计
4.2客户端设计
五、功能说明:
5.1用户注册
输入用户名和密码,插入用户表中,用户名不能和已有用户名字冲突,否则失败。
5.2用户登录
输入用户名和密码,通过遍历表中数据,核对数据信息,成功,转到第二个操作界面。
5.3查询单词
输入单词,在词典文件中查找,存在得到单词解释,并且将查询记录保存到记录表中。文章来源:https://www.toymoban.com/news/detail-679108.html
5.4查询历史记录
遍历记录表中数据,将用户查询的时间和单词打印到终端上。文章来源地址https://www.toymoban.com/news/detail-679108.html
5.5多进程实现TCP并发
六、具体代码:
head.h:
#ifndef __HEAD_H__
#define __HEAD_H__
#include <stdio.h>
#include <sqlite3.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>
#include <time.h>
#define PORT 8808
#define IP "127.0.0.1"
#define ERR_MSG(msg) { fprintf(stderr,"__%d__",__LINE__); perror(msg); }
int put_dict(sqlite3 *db);
void handler(int sig);
int do_register(sqlite3 *db,char *buf);
void do_register_cli(char *buf);
int Register(sqlite3 *db,char *buf);
void do_login(char *buf);
int Login(sqlite3 *db,char *buf);
int do_select_user(sqlite3 *db,char *name);
int do_insert(sqlite3 *db,char *words,char *mean,char *save_buf);
int Search(sqlite3 *db,char *buf,char *save_buf);
int Search_res(sqlite3 *db,char *buf,char *save_buf);
int deal_cli_msg(int newfd,struct sockaddr_in cin,sqlite3 *db);
#endif
dictionary.c(功能函数):
#include "head.h"
//导入词典
int put_dict(sqlite3 *db)
{
//创建并打开一个数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
printf("sqlite3_open:%s %d __%d__\n",\
sqlite3_errmsg(db),sqlite3_errcode(db),__LINE__);
return -1;
}
//创建一个表格 create table stu (id int,name char,score float);
//数据库中sql语句怎么写,这里就怎么写
char sql[128] = "create table dict (word char,mean char);";
char* errmsg = NULL;
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open:%s %d __%d__\n",\
errmsg,sqlite3_errcode(db),__LINE__);
return -1;
}
//打开文件
FILE* fp = fopen("./dict.txt","r");
if(NULL == fp)
{
perror("fopen");
return -1;
}
//循环读取文件中的数据,一行一行的读取
char buf[256] = "";
char word[32] = "";
char mean[200] = "";
int count = 1;
int i =0;
char* ptr = NULL;
while(1)
{
if(fgets(buf,sizeof(buf),fp) == NULL)
break;
buf[strlen(buf)-1] = 0;
//分离单词和意思
bzero(word,sizeof(word));
bzero(mean,sizeof(mean));
//获取" "子串在buf中的地址
ptr = strstr(buf," ");
if(NULL == ptr)
{
printf("没有找到对应子串\n");
break;
}
strncpy(word,buf,ptr-buf); //" "子串前面是单词
strcpy(mean,ptr+3); //" "子串后面是意思
//插入到数据库中
sprintf(sql,"insert into dict values(\"%s\",\"%s\");",word,mean);
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
printf("sqlite3_exec failed:%s __%d__\n",errmsg,__LINE__);
return -1;
}
}
printf("数据库建立成功\n");
//关闭文件
fclose(fp);
//关闭数据库
if(sqlite3_close(db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_close:%s %d __%d__\n",\
sqlite3_errmsg(db),sqlite3_errcode(db),__LINE__);
return -1;
}
return 0;
}
//捕获信号
void handler(int sig)
{
while(waitpid(-1, NULL, WNOHANG) > 0);
}
//实现注册功能
int do_register(sqlite3 *db,char *buf)
{
//打开数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open: %s __%d__\n",sqlite3_errmsg(db),__LINE__);
return -1;
}
//创建一个表
char sql[128] = "create table if not exists user (name char,passwd char);";
char *errmsg = NULL;
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
char *name = buf+2;
char *passwd = buf+2+strlen(buf+2)+1;
if(do_select_user(db,name) == 1)
{
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 1;
}
sprintf(sql,"insert into user values ('%s','%s');",name,passwd);
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
printf("register success...\n");
//关闭数据库,释放对应的内存空间
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 0;
}
//客户端注册函数
void do_register_cli(char *buf)
{
char name[32] = "";
char passwd[32] = "";
printf("请输入您的用户名>>>");
scanf("%s",name);
getchar();
printf("请输入您的密码>>>");
scanf("%s",passwd);
getchar();
sprintf(buf,"%s%c%s%c%s","1",0,name,0,passwd);
}
//实现注册功能
int Register(sqlite3 *db,char *buf)
{
//打开数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open: %s __%d__\n",sqlite3_errmsg(db),__LINE__);
return -1;
}
//创建一个表
char sql[128] = "create table if not exists user (name char,passwd char);";
char *errmsg = NULL;
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
char *name = buf+2;
char *passwd = buf+2+strlen(buf+2)+1;
if(do_select_user(db,name) == 1)
{
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 1;
}
sprintf(sql,"insert into user values ('%s','%s');",name,passwd);
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
printf("register success...\n");
//关闭数据库,释放对应的内存空间
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 0;
}
//登录函数
void do_login(char *buf)
{
char name[32] = "";
char passwd[32] = "";
printf("请输入用户名>>>");
scanf("%s",name);
getchar();
printf("请输入密码>>>");
scanf("%s",passwd);
getchar();
sprintf(buf,"%s%c%s%c%s","2",0,name,0,passwd);
}
//实现登录功能
int Login(sqlite3 *db,char *buf)
{
//打开数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open: %s __%d__\n",sqlite3_errmsg(db),__LINE__);
return -1;
}
char sql[128] = "create table if not exists user (name char,passwd char);";
char *errmsg = NULL;
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
strcpy(sql,"select * from user;");
char **pres = NULL;
int row,column;
if(sqlite3_get_table(db,sql,&pres,&row,&column,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
char *name = buf+2;
char *passwd = buf+2+strlen(buf+2)+1;
for(int i=2;i<(row+1)*column;i++)
{
if(strcmp(pres[i],name) == 0 && strcmp(pres[i+1],passwd) == 0)
{
printf("login success...\n");
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 2;
}
}
//关闭数据库,释放对应的内存空间
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 3;
}
//查找用户名是否存在
int do_select_user(sqlite3 *db,char *name)
{
char sql[128] = "select name from user;";
char **pres = NULL;
int row,column;
char *errmsg = NULL;
if(sqlite3_get_table(db,sql,&pres,&row,&column,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
for(int i=1;i<(row+1)*column;i++)
{
if(strcmp(pres[i],name) == 0)
{
fprintf(stderr,"sqlite3_exec: name already existss\n");
return 1;
}
}
return 0;
}
//实现查询功能函数
int do_insert(sqlite3 *db,char *words,char *mean,char *save_buf)
{
//获取当前时间戳
time_t t;
struct tm *info=NULL;
char mytime[128] = "";
t = time(NULL);
info = localtime(&t);
sprintf(mytime,"%d-%02d-%02d %02d:%02d:%02d",info->tm_year+1900,info->tm_mon+1,info->tm_mday,info->tm_hour,info->tm_min,info->tm_sec);
//打开数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open: %s __%d__\n",sqlite3_errmsg(db),__LINE__);
return -1;
}
//创建一个表
char sql[128] = "create table if not exists history (name char,word char,mean char,time char);";
char *errmsg = NULL;
char *name = save_buf;
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
//插入查询记录
sprintf(sql,"insert into history values (\"%s\",\"%s\", \"%s\",\"%s\");",name,words, mean,mytime);
if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
{
printf("sqlite3_exec failed:%s __%d__\n", errmsg, __LINE__);
return -1;
}
printf("do_insert success...\n");
}
//查询单词
int do_search(sqlite3 *db,char *buf,char *save_buf)
{
//打开数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open: %s __%d__\n",sqlite3_errmsg(db),__LINE__);
return -1;
}
char sql[128] = "select * from dict;";
char **pres = NULL;
int row,column;
char *errmsg = NULL;
if(sqlite3_get_table(db,sql,&pres,&row,&column,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_get_table: %s __%d__\n",errmsg,__LINE__);
return -1;
}
char *words = buf+2;
for(int i=0;i<(row+1)*column;i++)
{
if(strcmp(pres[i],words) == 0)
{
//若查询成功,则将该单词插入记录
do_insert(db,words,pres[i+1],save_buf);
bzero(buf, sizeof(buf));
sprintf(buf,"\t%s\t\t%s\t",pres[i],pres[i+1]);
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 4;
}
}
//关闭数据库,释放对应的内存空间
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
return 5;
}
//查询记录函数
int do_search_res(sqlite3 *db,char *buf,char *save_buf)
{
//打开数据库
if(sqlite3_open("./dict.db",&db) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_open: %s __%d__\n",sqlite3_errmsg(db),__LINE__);
return -1;
}
char sql[128] = "create table if not exists history (name char,word char,mean char,time char);";
char *errmsg = NULL;
if(sqlite3_exec(db,sql,NULL,NULL,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_exec: %s __%d__\n",errmsg,__LINE__);
return -1;
}
char msg[128] = "";
strcpy(sql,"select * from history;");
char **pres = NULL;
int row,column;
if(sqlite3_get_table(db,sql,&pres,&row,&column,&errmsg) != SQLITE_OK)
{
fprintf(stderr,"sqlite3_get_table: %s __%d__\n",errmsg,__LINE__);
return -1;
}
bzero(buf,sizeof(buf));
for(int i=4;i<(row+1)*column;i++)
{
if(i%4==0 && strcmp(save_buf,pres[i]) == 0)
{
sprintf(msg,"%s\t%s\t%s\t%s\n",pres[i],pres[i+1],pres[i+2],pres[i+3]);
strcat(buf,msg);
}
}
if(strlen(buf)!=0)
*(buf+strlen(buf)-1) = 0;
//关闭数据库,释放对应的内存空间
if(sqlite3_close(db) != SQLITE_OK)
{
printf("sqlite3_close failed:%s __%d__\n", sqlite3_errmsg(db), __LINE__);
return -1;
}
if(strlen(buf) == 0)
return 7;
return 6;
}
//服务器子进程处理客户端信息
int deal_cli_msg(int newfd,struct sockaddr_in cin,sqlite3 *db)
{
int flag = 0;
char buf[128] = "";
char save_buf[128] = "";
ssize_t res = 0;
int f_res = -1;
while(1)
{
bzero(buf, sizeof(buf));
//接收数据
res = recv(newfd, buf, sizeof(buf), 0);
if(res < 0)
{
ERR_MSG("recv");
return -1;
}
else if(0 == res)
{
printf("[%s : %d] client offline\n",inet_ntoa(cin.sin_addr), ntohs(cin.sin_port));
break;
}
//调用功能函数
if(strcmp(buf,"1") == 0)
f_res = Register(db,buf); //注册
else if(strcmp(buf,"2") == 0)
{
f_res = Login(db,buf); //登录
strcpy(save_buf,buf+2); //将用户名另存
}
else if(strcmp(buf,"3") == 0)
{
f_res = do_search(db,buf,save_buf); //查询单词
}
else if(strcmp(buf,"4") == 0)
f_res = do_search_res(db,buf,save_buf); //查询记录
//发送数据
if(0 == f_res)
{
bzero(buf, sizeof(buf));
strcpy(buf,"[注册成功!]");
}
else if(1 == f_res)
{
bzero(buf, sizeof(buf));
strcpy(buf,"[对不起,注册失败,该用户名已存在!]");
}
else if(2 == f_res)
{
bzero(buf, sizeof(buf));
strcpy(buf,"[登录成功!]");
}
else if(3 == f_res)
{
bzero(buf, sizeof(buf));
strcpy(buf,"[对不起,登录失败,该用户名/密码不存在!]");
}
else if(5 == f_res)
{
bzero(buf, sizeof(buf));
strcpy(buf,"[对不起,无法查找找到该单词!]");
}
else if(7 == f_res)
{
bzero(buf, sizeof(buf));
strcpy(buf,"[对不起,该用户没有历史记录!]");
}
if(send(newfd, buf, sizeof(buf), 0) < 0)
{
ERR_MSG("send");
return -1;
}
}
close(newfd);
return 0;
}
服务器(Ser.c):
#include "head.h"
int main(int argc, const char *argv[])
{
sqlite3 *db = NULL;
if(signal(17, handler) == SIG_ERR)
{
ERR_MSG("signal");
return -1;
}
//导入词典
put_dict(db);
//创建流式套接字
int sfd = socket(AF_INET,SOCK_STREAM,0);
if(sfd < 0)
{
ERR_MSG("socket");
return -1;
}
//设置允许端口号复用
int reuse = 1;
if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)
{
perror("setsockopt");
return -1;
}
//绑定服务器IP和端口号
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
sin.sin_addr.s_addr = inet_addr(IP);
if(bind(sfd,(struct sockaddr *)&sin,sizeof(sin)) < 0)
{
ERR_MSG("bind");
return -1;
}
//将套接字设置为被动监听状态
if(listen(sfd,10) < 0)
{
ERR_MSG("listen");
return -1;
}
int newfd = -1;
struct sockaddr_in cin;
socklen_t addrlen = sizeof(cin);
//从已完成连接的队列中获取一个客户端信息,生成一个新的文件描述符
while(1)
{
newfd = accept(sfd,(struct sockaddr *)&cin,&addrlen);
if(newfd < 0)
{
ERR_MSG("accept");
return -1;
}
printf("[%s : %d] connect success...\n",inet_ntoa(cin.sin_addr), ntohs(cin.sin_port));
if(0 == fork())
{
close(sfd);
deal_cli_msg(newfd,cin,db);
exit(0);
}
close(newfd);
}
close(sfd);
return 0;
}
客户端(Cli.c):
#include "head.h"
int main(int argc, const char *argv[])
{
sqlite3 *db =NULL;
//创建流式套接字
int cfd = socket(AF_INET, SOCK_STREAM, 0);
if(cfd < 0)
{
ERR_MSG("socket");
return -1;
}
printf("cfd = %d\n", cfd);
//绑定客户端的的IP和端口--->非必须绑定
//若不绑定,则操作系统会给客户端绑定上客户端所在的主机IP,以及随机端口(49152~65535)
//填充服务器的地址信息结构体,真实的地址信息结构体根据地址族指定
//AF_INET: man 7 ip
//要连接哪个服务器,就填对应服务器的IP和端口
struct sockaddr_in sin;
sin.sin_family = AF_INET; //必须填AF_INET
sin.sin_port = htons(PORT); //端口号: 填服务器绑定端口号
sin.sin_addr.s_addr = inet_addr(IP); //IP地址:服务器绑定的IP地址
//连接服务器
if(connect(cfd, (struct sockaddr*)&sin, sizeof(sin)) < 0)
{
ERR_MSG("connect");
return -1;
}
printf("connect success\n");
ssize_t res = 0;
char buf[128] = "";
char buf1[128] ="";
char save_buf[128] ="";
char choose = 0;
while(1)
{
system("clear");
printf("-----------------------\n");
printf("---------1.注册--------\n");
printf("---------2.登录--------\n");
printf("---------3.退出--------\n");
printf("-----------------------\n");
printf("请输入您需要执行的操作>>>");
choose = getchar();
while(getchar() != 10);
switch(choose)
{
case '1':
//注册函数
do_register_cli(buf);
break;
case '2':
//登录函数
do_login(buf);
break;
case '3':
//退出函数
goto END;
default:
printf("对不起,您的输入有误,请重新输入\n");
}
//发送数据
if(send(cfd,buf,sizeof(buf),0) < 0)
{
perror("send");
return -1;
}
//接受数据
bzero(buf,sizeof(buf));
res = recv(cfd,buf,sizeof(buf),0);
if(res < 0)
{
perror("recv");
return -1;
}
else if(0 == res)
{
printf("[%s : %d] server offline\n",IP,PORT);
break;
}
printf("%s\n",buf);
strcpy(save_buf,buf);
while(strcmp(save_buf,"[登录成功!]") == 0)
{
system("clear");
printf("--------------------------\n");
printf("-------1.查找单词---------\n");
printf("-------2.查找历史记录-----\n");
printf("-------3.退出登录---------\n");
printf("--------------------------\n");
printf("请输入您要执行的操作>>>");
choose = getchar();
while(getchar() != 10);
// bzero(buf,sizeof(buf));
// fgets(buf,sizeof(buf),stdin);
// buf[strlen(buf)-1] = 0;
char words[20] = "";
switch(choose)
{
case '1':
{
while(1)
{
bzero(buf,sizeof(buf));
printf("请输入您要查找的单词(输入 \"#\" 结束)>>>");
scanf("%s",words);
getchar();
if(strcmp(words,"#") == 0)
break;
sprintf(buf,"%s%c%s%c","3",0,words,0);
//发送数据
if(send(cfd,buf,sizeof(buf),0) < 0)
{
perror("send");
return -1;
}
//接收查询单词结果
bzero(buf,sizeof(buf));
res = recv(cfd,buf,sizeof(buf),0);
if(res < 0)
{
perror("recv");
return -1;
}
else if(0 == res)
{
printf("[%s : %d] server offline\n",IP,PORT);
// break;
goto END;
}
printf("%s\n",buf);
}
}
break;
case '2':
//登录函数
{
sprintf(buf,"%s%c","4",0);
//发送数据
if(send(cfd,buf,sizeof(buf),0) < 0)
{
perror("send");
return -1;
}
//接受查询单词结果
bzero(buf,sizeof(buf));
res = recv(cfd,buf,sizeof(buf),0);
if(res < 0)
{
perror("recv");
return -1;
}
else if(0 == res)
{
printf("[%s : %d] server offline\n",IP,PORT);
goto END;
// break;
}
printf("%s\n",buf);
}
break;
case '3':
goto END1;
default:
printf("对不起,您的输入有误,请重新输入\n");
}
printf("输入任意字符清屏>>>");
while(getchar() != 10);
}
END1:
printf("输入任意字符清屏>>>");
while(getchar() != 10);
}
END:
//关闭所有文件描述符
close(cfd);
return 0;
}
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