基于LINUX的多功能聊天室
其实这个项目在我电脑已经躺了多时，最初写完项目规划后，我就认认真真地去实现了它，后来拿着这个项目区参加了面试，同样面试官也拿这个项目来问我，当然我是做过一遍了，而且为了面试，我将什么strcpy,strlen等最常用的函数都自己实现了一遍，说着，我感觉自己有点挺用功的样子呢！
后来，工作也定下来了，等三方，然后继续帮助我的导师做项目，经过老师的威逼利诱下，我屈服了，又把智能家居系统作为项目，同时也是我的毕业设计，而且功能还要十分完善的说,好吧，别人的简单，但我也无所谓，因为看到技术二字，我必然是两眼放光的那种，特别喜欢那种突然我想到咋么解决了，然后就帮功能实现了那种感觉，像是上瘾了一样,（果然是当程序员的料）
项目回想与思考
嗯，我的项目基本上的功能和项目规划里面基本上是一致的，而且功能也是非常完善了，基本上能够实现了我所需要的功能，但是我也要思考我在整个项目过程中的得失，我在项目的思考中，其实把他定义错了，因为是一个非常小的聊天室的功能，其实我无需使用数据库来作为登陆与否的查询方法，其实完全可以使用链表的方法来做客户端的登录，这样才是不会造成资源的浪费
项目代码
我将分两篇来讲述我的项目，第一篇（也就是这篇为服务器篇）；第二篇为客户端篇，当然里面的代码基本上全是我个人所写，也参考过一部分别的代码！
Makefile
基本上我也忘得差不多了，对这个项目，我感觉淡淡的陌生感，但是重拾还是非常容易的嘛！看一个项目咋么形成,Makefile不容错过！
main = insert.o chatroom.o sql.o passwd.o string.o cmd.o socket.o
chatroom:$(main)
@gcc $(main) -o chatroom -lsqlite3
passwd.o: passwd.c
@gcc passwd.c -c
insert.o: insert.c
@gcc insert.c -c
sql.o:sql.c
@gcc sql.c -c
string.o:string.c
@gcc string.c -c
cmd.o:cmd.c
@gcc cmd.c -c
socket.o:socket.c
@gcc socket.c -c
.PHONY: clean cleanall
clean:
@rm *.o
cleanall:
@rm *.o chatroom通过这个我们不难发现这个项目调动了什么，和哪些文件！
passwd.c文件分析
先不说我们把代码贴出来先！
#include"data.h"
void reg_db(sqlite3 *db,char **errmsg,char *name,char *passwd)//注册插入
{
char sql[1024];
int rc;
sprintf(sql,"insert into user(name,passwd)values('%s','%s')",name,passwd);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
is_sqlite(rc);
}
void log_db(sqlite3 *db,char **errmsg,char *name,int sockfd)//登陆插入
{
char sql[1024];
int rc;
sprintf(sql,"insert into online(name,socket,flag)values('%s',%d,1)",name,sockfd);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
is_sqlite(rc);
}
void delete_online_db(sqlite3 *db,char **errmsg,int sockfd)//删除登陆
{
char sql[1024];
int rc;
sprintf(sql,"delete from online where socket = %d",sockfd);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
is_sqlite(rc);
}
int read_user(sqlite3 *db,char **errmsg,char *user)//询问有无此用户
{
int rc;
int i;
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from user",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_strcmp(user,sqlite3_column_text(stmt,1));
if(userflag == 0 )
{
return USERIN;
}
rc = sqlite3_step(stmt);
}
return USEROUT;
}
int read_id(sqlite3 *db,char **errmsg,char *user)//询问有无此用户
{
int rc;
int i;
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from user",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_strcmp(user,sqlite3_column_text(stmt,1));
if(userflag == 0 )
{
return atoi(sqlite3_column_text(stmt,0));
}
rc = sqlite3_step(stmt);
}
return USEROUT;
}
void read_id_name(sqlite3 *db,char **errmsg,vpChat temp)//询问有无此用户
{
int rc;
int i;
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from user",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_atoi(sqlite3_column_text(stmt,0));
if(userflag == temp->flag )
{
my_strcpy(temp->name,sqlite3_column_text(stmt,1));
}
rc = sqlite3_step(stmt);
}
}
int read_pass(sqlite3 *db,char **errmsg,char *user,char *passwd)//用于用户验证
{
int rc;
int i;
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from user",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
int passwdflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_strcmp(user,sqlite3_column_text(stmt,1));
passwdflag = my_strcmp(passwd,sqlite3_column_text(stmt,2));
if(userflag == 0 && passwdflag == 0)
{
return PASSWDOK;
}
rc = sqlite3_step(stmt);
}
return PASSWDNO;
}
int read_online_ok(sqlite3 *db,char **errmsg,char *user)//用于验证在线用户
{
int rc;
int i;
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from online",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_strcmp(user,sqlite3_column_text(stmt,1));
if(userflag == 0)
{
return ONLINEIN;
}
rc = sqlite3_step(stmt);
}
return ONLINEOUT;
}哦，这个原来是用来登录注册用的呀！
那么我在来看看passwd.h呢！
void reg_db(sqlite3 *db,char **errmsg,char *name,char *passwd);
int read_user(sqlite3 *db,char **errmsg,char *user);
int read_pass(sqlite3 *db,char **errmsg,char *user,char *passwd);//用于用户验证
int read_online_ok(sqlite3 *db,char **errmsg,char *user);
void delete_online_db(sqlite3 *db,char **errmsg,int sockfd);
int read_id(sqlite3 *db,char **errmsg,char *user);//询问有无此用户
void read_id_name(sqlite3 *db,char **errmsg,vpChat temp);//询问有无此用户原来是对函数进行申明啊！
但是#include"data.h" 这个文件又是干什么的呢？
那么data.h按照猜测肯定是各类头文件的引用喽！
#ifndef __DATA__
#define __DATA__
#define MAXSIZE 100
#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<string.h>
#include<netdb.h>
#include<netinet/in.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<ctype.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<sqlite3.h>
#include<unistd.h>
#include<signal.h>
#include<time.h>
#include<termios.h>
#include<assert.h>
#define portnumber 8000 //宏定义端口号
struct chat
{
char name[20];//用户名
char passwd[20];//密码
int cmd;//命令
int revert;//返回值
char toname[20];//目标客户名
char msg[800];//发送信息
int flag;
int sockfd;
char time[40];
char filename[40];
};
typedef struct chat stChat;
typedef struct chat* vpChat;
enum cmd
{
LOGID = 0,
REG = 1,
LOG = 2,
USERHELP = 3,
USEREXIT = 4,
CHAT = 3,
ALL = 4,
SMILE = 5,
WELCOME = 6,
EXIT = 7,
HELP = 8,
PASSWD = 9,
BOOT = 10,
STEP = 11,
BAN = 12,
SET = 13,
SEE = 14,
DATA = 15,
SEND = 16,
CHANGE = 17
};
enum revert
{
USERIN = 1,
USEROUT = -1,
PASSWDOK = 2,
PASSWDNO = -2,
ONLINEIN = 3,
ONLINEOUT = -3,
REGNO = -4,
REGOK = 4,
MYFLAGOK = -5,
MYFLAGNO = -6,
TOFLAGOK = -7,
TOFLAGNO = -8,
CHATOK = 1,
ALLOK = 6,
SMILEOK = 6,
WELCOMEOK = 6,
SEEOK = 7,
BOOTOK = 1,
DATAOK = 8,
SENDOK = 2
};
#endif果然与我们的猜想差不多啊！
insert.c文件分析
#include"data.h"
void insert_server()//服务器运行提示
{
system("reset");
printf("\t\t\t\t\t**********************************\n");
printf("\t\t\t\t\t* 欢迎使用 *\n");
printf("\t\t\t\t\t* 聊天室服务器 *\n");
printf("\t\t\t\t\t**********************************\n");
}sogo,这文件原来是给我们看服务器启动时的界面的呀！
sql.c文件分析
看这名字，肯定跟数据库有关！
#include"data.h"
void is_malloc_ok(vpChat *list)
{
*list = (vpChat)malloc(sizeof(stChat));
if(*list == NULL)
{
exit(1);
}
}
void is_sqlite(int rc) //测试数据库
{
if(rc == SQLITE_OK)
{
printf("sqlite %d succse \n",__LINE__);
}
else
{
printf("数据库发生错误，请使用SQLITE3 看数据库!\n");
printf("sqlite %d error\n",__LINE__);
exit(1);
}
}
void is_sqlite_ok(int rc)
{
if(rc == SQLITE_OK)
{
printf("sqlite %d succse \n",__LINE__);
}
else
{
printf("sqlite %d error\n",__LINE__);
}
}
void open_db(sqlite3 **db)//打开数据库
{
int rc;
rc = sqlite3_open("server.db",db);
is_sqlite(rc);
}
void creat_user_db(sqlite3 *db,char **errmsg)//建立user数据表
{
int rc;
rc = sqlite3_exec(db,"create table user(id integer primary key autoincrement,name text,passwd text)",NULL,NULL,errmsg);
is_sqlite_ok(rc);
}
void creat_data_db(sqlite3 *db,char **errmsg)//建立data数据表
{
int rc;
rc = sqlite3_exec(db,"create table data(id integer primary key autoincrement,time text,name text,toname text,msg text)",NULL,NULL,errmsg);
is_sqlite_ok(rc);
}
void creat_online_db(sqlite3 *db,char **errmsg)//建立online数据表
{
int rc;
rc = sqlite3_exec(db,"create table online(id integer primary key autoincrement,name text,socket integer,flag integer)",NULL,NULL,errmsg);
is_sqlite_ok(rc);
}
void creat_server_db(sqlite3 *db,char **errmsg)//建立server数据表
{
int rc;
rc = sqlite3_exec(db,"create table server(id integer primary key autoincrement,time text)",NULL,NULL,errmsg);
is_sqlite_ok(rc);
}
void insert_server_db(sqlite3 *db,char *time,char **errmsg)//向server数据库插入数据
{
int rc;
char sql[1024];
sprintf(sql,"insert into server(time) values('%s')",time);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
is_sqlite(rc);
printf("数据库已经录入完毕\n");
}
void insert_data_db(sqlite3 *db,char **errmsg,char *time,vpChat temp)//插入聊天记录
{
int rc;
char sql[1024];
sprintf(sql,"insert into data(time,name,toname,msg) values('%s','%s','%s','%s')",time,temp->name,temp->toname,temp->msg);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
is_sqlite(rc);
printf("聊天记录已经录入完毕\n");
}
void delete_clean_db(sqlite3 *db,char *tablename,char **errmsg)//清空数据库
{
char sql[1024];
int rc;
sprintf(sql,"delete from %s where name !='root'",tablename);
rc = sqlite3_exec(db,"delete from student",NULL,NULL,errmsg);
is_sqlite(rc);
}
void read_db_ok(sqlite3 *db,char *errmsg,char*tablename)//用于检测数据库
{
int rc;
int i;
char sql[1024];
sqlite3_stmt *stmt = NULL;
sprintf(sql,"select * from %s ",tablename);
rc = sqlite3_prepare(db,sql,-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int ncolumn;
ncolumn = sqlite3_column_count(stmt);
while(rc == SQLITE_ROW)
{
for(i = 0; i < ncolumn; i++)
{
printf("%s|",sqlite3_column_text(stmt,i));
}
printf("\n");
rc = sqlite3_step(stmt);
}
}
int read_online_fd(sqlite3 *db,char **errmsg,char *user)//获取FD
{
int rc;
int i;
char fd[100];
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from online",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_strcmp(user,sqlite3_column_text(stmt,1));
if(userflag == 0)
{
my_strcpy(fd,sqlite3_column_text(stmt,2));
return my_atoi(fd);
}
rc = sqlite3_step(stmt);
}
return ONLINEOUT;
}
int read_online_flag(sqlite3 *db,char **errmsg,char *user)//用于验证是否禁言
{
int rc;
int i;
char flag[10];
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from online",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
userflag = my_strcmp(user,sqlite3_column_text(stmt,1));
if(userflag == 0)
{
my_strcpy(flag,sqlite3_column_text(stmt,3));
return my_atoi(flag);
}
rc = sqlite3_step(stmt);
}
return -10;
}
void write_online_all(sqlite3 *db,char **errmsg,vpChat temp)//向在线用户发送信息
{
int rc;
int flag;
char fd[100];
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from online",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
flag = my_strcmp(temp->name,sqlite3_column_text(stmt,1));
my_strcpy(fd,sqlite3_column_text(stmt,2));
if(flag != 0)
{
write( my_atoi(fd),temp,sizeof(stChat));
}
sleep(1);
rc = sqlite3_step(stmt);
}
}
int update_passwd(sqlite3 *db,char **errmsg,char *name,char *passwd)//修改密码
{
int rc;
char sql[1024];
sprintf(sql,"update user set passwd = '%s'where name = '%s'",passwd,name);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
if(rc == SQLITE_OK)
{
return 1;
}
else
{
return 0;
}
}
int update_user(sqlite3 *db,char **errmsg,char *name,char *toname)//修改密码
{
int rc;
char sql[1024];
sprintf(sql,"update user set name = '%s'where name = '%s'",toname,name);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
if(rc == SQLITE_OK)
{
return 1;
}
else
{
return 0;
}
}
int update_db_data(sqlite3 *db,char **errmsg,char *name,char *toname)//修改密码
{
int rc1;
int rc2;
char sql[1024];
sprintf(sql,"update data set name = '%s'where name = '%s'",toname,name);
rc1 = sqlite3_exec(db,sql,NULL,NULL,errmsg);
memset(sql,0,1024);
sprintf(sql,"update data set toname = '%s'where toname = '%s'",toname,name);
rc2 = sqlite3_exec(db,sql,NULL,NULL,errmsg);
if(rc1 == SQLITE_OK && rc2 == SQLITE_OK)
{
return 1;
}
else
{
return 0;
}
}
int update_flag(sqlite3 *db,char **errmsg,char *name,int flag)//禁言解禁操作
{
int rc;
char sql[1024];
sprintf(sql,"update online set flag = %d where name = '%s'",flag,name);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
if(rc == SQLITE_OK)
{
return 1;
}
else
{
return 0;
}
}
int delete_user(sqlite3 *db,char **errmsg,char *name)//注销用户
{
int rc;
char sql[1024];
sprintf(sql,"delete from user where name = '%s'",name);
rc = sqlite3_exec(db,sql,NULL,NULL,errmsg);
if(rc == SQLITE_OK)
{
return 1;
}
else
{
return 0;
}
}
void read_online_all(sqlite3 *db,char **errmsg,vpChat temp)//向在线用户发送信息
{
int rc;
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from online",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
my_strcpy(temp->msg,sqlite3_column_text(stmt,1));
mywrite(temp);
sleep(1);
rc = sqlite3_step(stmt);
}
}
void read_data(sqlite3 *db,char **errmsg,vpChat temp)//向在线用户发送信息
{
int rc;
char name[80];
char toname[80];
sqlite3_stmt *stmt = NULL;
rc = sqlite3_prepare(db,"select * from data",-1,&stmt,0);
is_sqlite_ok(rc);
rc = sqlite3_step(stmt);
int userflag = 1;
while(rc == SQLITE_ROW)
{
my_strcpy(name,sqlite3_column_text(stmt,2));
my_strcpy(toname,sqlite3_column_text(stmt,3));
if( my_strcmp(temp->name,name) == 0)
{
strcat(temp->msg,"你");
strcat(temp->msg,"给");
strcat(temp->msg,toname);
strcat(temp->msg,"发了");
strcat(temp->msg,sqlite3_column_text(stmt,4));
strcat(temp->msg,"\n");
my_strcpy(temp->time,sqlite3_column_text(stmt,1));
mywrite(temp);
memset(temp->msg,0,sizeof(temp->msg));
sleep(1);
}
if(my_strcmp(temp->name,toname) == 0)
{
strcat(temp->msg,toname);
strcat(temp->msg,"给你发了");
strcat(temp->msg,sqlite3_column_text(stmt,4));
strcat(temp->msg,"\n");
my_strcpy(temp->time,sqlite3_column_text(stmt,1));
mywrite(temp);
memset(temp->msg,0,sizeof(temp->msg));
sleep(1);
}
rc = sqlite3_step(stmt);
}
}
这个是数据库的各类操作呢！
那么它的头文件估计也是函数申明
void is_sqlite(int rc); //测试数据库
void is_malloc_ok(vpChat *list);
void is_sqlite_ok(int rc);
void open_db(sqlite3 **db);//打开数据库
void creat_user_db(sqlite3 *db,char **errmsg);//建立user数据表
void creat_data_db(sqlite3 *db,char **errmsg);//建立data数据表
void creat_online_db(sqlite3 *db,char **errmsg);//建立online数据表
void creat_server_db(sqlite3 *db,char **errmsg);//建立server数据表
void insert_server_db(sqlite3 *db,char *time,char **errmsg);
void read_db_ok(sqlite3 *db,char *errmsg,char*tablename);
void delete_clean_db(sqlite3 *db,char *tablename,char **errmsg);
int read_online_fd(sqlite3 *db,char **errmsg,char *user);
int read_online_flag(sqlite3 *db,char **errmsg,char *user);
void write_online_all(sqlite3 *db,char **errmsg,vpChat temp);
int update_passwd(sqlite3 *db,char **errmsg,char *name,char *passwd);
void insert_data_db(sqlite3 *db,char **errmsg,char *time,vpChat temp);
int update_flag(sqlite3 *db,char **errmsg,char *name,int flag);
int delete_user(sqlite3 *db,char **errmsg,char *name);
void read_online_all(sqlite3 *db,char **errmsg,vpChat temp);
void read_data(sqlite3 *db,char **errmsg,vpChat temp);
int update_user(sqlite3 *db,char **errmsg,char *name,char *toname);
int update_db_data(sqlite3 *db,char **errmsg,char *name,char *toname);干货来了，string.c
很明显是我为了面试准备所写的函数！经测是有效的！
#include"data.h"
int my_strlen(const char *str)
{
int len;
while(*str++ != '\0')
{
len++;
}
return len;
}
int my_strcmp(const char *str1,const char *str2)
{
if(str1 != NULL && str2 != NULL)
{
}
else
{
return -2;
}
int i;
while((*str1)!='\0' && (*str2) != '\0')
{
if((*str1) == (*str2))
{
str1++;
str2++;
}
else
{
break;
}
}
if((*str1) == '\0' && (*str2) == '\0')
{
return 0;
}
else
{
return (*str1) > (*str2)? 1 : -1;
}
}
char *my_strcpy( char *dest,const char *src)
{
if(dest != NULL && src != NULL)
{
}
else
{
return NULL;
}
char *adress = dest;
while(((*dest++) = (*src++)) != '\0');
return adress;
}
int my_atoi(const char *str)
{
if(str != NULL)
{
}
else
{
return -1;
}
const char* p = str;
int minus = 0;
long result = 0;
if(*p == '-')
{
minus = 1;
p++;
}
else if(*p == '+')
{
p++;
}
while(*p != '\0')
{
if(*p < '0' || *p >'9')
{
return -1;
}
result = result*10 + ((*p) - '0');
p++;
}
minus = 1 ? -result:result;
return result;
}
char * my_strcat(char *dest,const char *src)
{
if(dest != NULL && src != NULL)
{
}
else
{
return NULL;
}
char *address = dest;
while((*dest) != '\0')
{
dest++;
}
while(((*dest++) = (*src++)) != '\0');
return address;
}
CMD.c 命令解析
#include"data.h"
int cmd_user(sqlite3 *db,char **errmsg,vpChat temp,int sockfd)//用语判别用户信息
{
int flag;
int sayflag;
printf("cmd = %d\n",temp->cmd);
switch(temp->cmd )
{
case REG:
{
flag = read_user(db,errmsg,temp->name);
if(flag == USERIN)
{
return REGNO;//注册重名
}
else
{
reg_db(db,errmsg,temp->name,temp->passwd);
temp->flag = read_id(db,errmsg,temp->name);
return REGOK;
}
break;
}
case LOG:
{
int flagpasswd;
flag = read_online_ok(db,errmsg,temp->name);
if(flag == ONLINEIN)
{
return ONLINEIN;
}
else
{
flagpasswd = read_pass(db,errmsg,temp->name,temp->passwd);
if(flagpasswd == PASSWDOK)
{
log_db(db,errmsg,temp->name,sockfd);
return PASSWDOK;
}
else
{
return PASSWDNO;
}
}
break;
}
case LOGID:
{
int flagpasswd;
read_id_name(db,errmsg,temp);//询问有无此用户
flag = read_online_ok(db,errmsg,temp->name);
if(flag == ONLINEIN)
{
return ONLINEIN;
}
else
{
flagpasswd = read_pass(db,errmsg,temp->name,temp->passwd);
if(flagpasswd == PASSWDOK)
{
log_db(db,errmsg,temp->name,sockfd);
return PASSWDOK;
}
else
{
return PASSWDNO;
}
}
break;
}
case CHAT:
{
int tempfd;
tempfd = read_online_fd(db,errmsg,temp->toname);
if(tempfd == ONLINEOUT)
{
return ONLINEOUT;
}
else
{
sayflag = read_online_flag(db,errmsg,temp->name);
if(sayflag == 0)
{
return MYFLAGNO;
}
else
{
temp->flag = flag;
temp->sockfd = tempfd;
insert_data_db(db,errmsg,temp->time,temp);
return CHATOK;
}
}
break;
}
case ALL:
{
sayflag = read_online_flag(db,errmsg,temp->name);
if(sayflag == 0)
{
return MYFLAGNO;
}
else
{
insert_data_db(db,errmsg,temp->time,temp);
return ALLOK;
}
break;
}
case SMILE:
{
sayflag = read_online_flag(db,errmsg,temp->name);
if(sayflag == 0)
{
return MYFLAGNO;
}
else
{
insert_data_db(db,errmsg,temp->time,temp);
return SMILEOK;
}
break;
}
case WELCOME:
{
sayflag = read_online_flag(db,errmsg,temp->name);
if(sayflag == 0)
{
return MYFLAGNO;
}
else
{
insert_data_db(db,errmsg,temp->time,temp);
return WELCOMEOK;
}
break;
}
case PASSWD:
{
flag = update_passwd(db,errmsg,temp->name,temp->passwd);
return flag;
break;
}
case BOOT:
{
int tempfd;
tempfd = read_online_fd(db,errmsg,temp->toname);
if(tempfd == ONLINEOUT)
{
return ONLINEOUT;
}
else
{
temp->sockfd = tempfd;
return BOOTOK;
}
break;
}
case STEP:
{
int tempfd;
tempfd = read_online_fd(db,errmsg,temp->toname);
if(tempfd == ONLINEOUT)
{
return ONLINEOUT;
}
else
{
flag = update_flag(db,errmsg,temp->toname,0);
if(flag == 1)
{
temp->sockfd = tempfd;
}
return flag;
}
break;
}
case BAN:
{
int tempfd;
tempfd = read_online_fd(db,errmsg,temp->toname);
if(tempfd == ONLINEOUT)
{
return ONLINEOUT;
}
else
{
sayflag = read_online_flag(db,errmsg,temp->toname);
if(sayflag == 1)
{
return TOFLAGOK;
}
else
{
flag = update_flag(db,errmsg,temp->toname,1);
if(flag == 1)
{
temp->sockfd = tempfd;
}
return flag;
}
}
break;
}
case SET:
{
int tempfd;
tempfd = read_online_fd(db,errmsg,temp->toname);
if(tempfd == ONLINEOUT)
{
flag = delete_user(db,errmsg,temp->toname);
return flag;
}
else
{
return ONLINEIN;
}
break;
}
case SEE:
{
return SEEOK;
break;
}
case DATA:
{
return DATAOK;
break;
}
case SEND:
{
int tempfd;
tempfd = read_online_fd(db,errmsg,temp->toname);
if(tempfd == ONLINEOUT)
{
return ONLINEOUT;
}
else
{
temp->sockfd = tempfd;
return SENDOK;
}
break;
}
case CHANGE:
{
flag = read_user(db,errmsg,temp->toname);
if(flag == USERIN)
{
return REGNO;//注册重名
}
else
{
flag = update_user(db,errmsg,temp->name,temp->toname);//¿¿¿¿
if(flag == 1)
{
sayflag = update_db_data(db,errmsg,temp->name,temp->toname);//修改密码
return sayflag;
}
else
{
return 0;
}
}
break;
}
}
}
那么它的头文件是估计也是用于申明函数的！
int cmd_user(sqlite3 *db,char **errmsg,vpChat temp,int sockfd);socket.c文件分析
#include"data.h"
void mybzero(struct sockaddr_in *sin)//对server_addr_in 结构进行赋值
{
bzero(sin,sizeof(struct sockaddr_in)); /* 先清零 */
sin->sin_family=AF_INET; //
sin->sin_addr.s_addr=htonl(INADDR_ANY); //表示接受任何ip地址 将ip地址转换成网络字节序
sin->sin_port=htons(portnumber); //将端口号转换成网络字节序
}
int mysocket()//调用socket函数创建一个TCP协议套接口
{
int lfd;
if((lfd = socket(AF_INET,SOCK_STREAM,0)) == -1) // AF_INET:IPV4;SOCK_STREAM:TCP
{
fprintf(stderr,"Socket error:%s\n\a",strerror(errno));
exit(1);
}
return lfd;
}
void mybind(int lfd,struct sockaddr_in *sin) // 调用bind函数 将serer_addr结构绑定到sockfd上
{
if(bind(lfd,(struct sockaddr *)(sin),sizeof(struct sockaddr))==-1)
{
fprintf(stderr,"Bind error:%s\n\a",strerror(errno));
exit(1);
}
}
void mylisten(int lfd)// 开始监听端口 等待客户的请求
{
if(listen(lfd,20)==-1)
{
fprintf(stderr,"Listen error:%s\n\a",strerror(errno));
exit(1);
}
}
int myaccept(int lfd,struct sockaddr_in *cin,socklen_t * addr_len)// 接受客户端的请求
{
int cfd;
if((cfd=accept(lfd,(struct sockaddr *)cin,addr_len))==-1)
{
fprintf(stderr,"Accept error:%s\n\a",strerror(errno));
exit(1);
}
return cfd;
}
void mywrite(vpChat temp)
{
int num;
if((num = write(temp->sockfd,temp,sizeof(stChat))) == -1)
{
printf("send error!\n");
}
}
服务器主程序
朱程序里面主要是打开数据库，初始化数据库，及用于显示数据库的命令，下面为代码部分
#include"data.h"
#include"package.h"
void display(stChat temp)//用于显示发送命令
{
printf("name = %s\n",temp.name);
printf("passwd = %s\n",temp.passwd);
printf("cmd = %d\n",temp.cmd);
printf("revert = %d\n",temp.revert);
printf("toname = %s\n",temp.toname);
printf("msg = %s\n",temp.msg);
printf("flag = %d\n",temp.flag);
printf("sockfd = %d\n",temp.sockfd);
printf("time = %s\n",temp.time);
printf("filename = %s\n",temp.filename);
}
int main()
{
time_t timep;
time(&timep);
char *timedata = ctime(&timep);
sqlite3 *db = NULL;
char *errmsg;
open_db(&db);//打开数据库
creat_user_db(db,&errmsg);
creat_data_db(db,&errmsg);
creat_online_db(db,&errmsg);
creat_server_db(db,&errmsg);
insert_server_db(db,timedata,&errmsg);//向server数据库插入数据
insert_server();
int lfd;
int cfd;
int sfd;
int rdy;
stChat temp;
struct sockaddr_in sin;
struct sockaddr_in cin;
int client[FD_SETSIZE]; /* 客户端连接的套接字描述符数组 */
int maxi;
int maxfd; /* 最大连接数 */
fd_set rset;
fd_set allset;
socklen_t addr_len; /* 地址结构长度 */
int i;
int n;
int len;
int opt = 1; /* 套接字选项 */
char addr_p[20];
mybzero(&sin);
lfd = mysocket();
/*设置套接字选项 使用默认选项*/
setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
mybind(lfd,&sin); // 调用bind函数 将serer_addr结构绑定到sockfd上
mylisten(lfd);// 开始监听端口 等待客户的请求
printf("\t\t\t服务器开始等待客户端链接\n");
maxfd = lfd; /*对最大文件描述符进行初始化*/
maxi = -1;
/*初始化客户端连接描述符集合*/
for(i = 0;i < FD_SETSIZE;i++)
{
client[i] = -1;
}
FD_ZERO(&allset); /* 清空文件描述符集合 */
FD_SET(lfd,&allset); /* 将监听字设置在集合内 */
/* 开始服务程序的死循环 */
while(1)
{
rset = allset;
/*得到当前可以读的文件描述符数*/
rdy = select(maxfd + 1, &rset, NULL, NULL, NULL);
if(FD_ISSET(lfd, &rset))
{
addr_len = sizeof(sin);
cfd = myaccept(lfd,&cin,&addr_len);// 接受客户端的请求
/*查找一个空闲位置*/
for(i = 0; i<FD_SETSIZE; i++)
{ //printf("%d\t",client[i]);
if(client[i] <= 0)
{
client[i] = cfd; /* 将处理该客户端的连接套接字设置到该位置 */
break;
}
}
/* 太多的客户端连接 服务器拒绝俄请求 跳出循环 */
if(i == FD_SETSIZE)
{
printf("too many clients");
exit(1);
}
FD_SET(cfd, &allset); /* 设置连接集合 */
if(cfd > maxfd) /* 新的连接描述符 */
{
maxfd = cfd;
}
if(i > maxi)
{
maxi = i;
}
if(--rdy <= 0) /* 减少一个连接描述符 */
{
continue;
}
}
/* 对每一个连接描述符做处理 */
for(i = 0;i< FD_SETSIZE;i++)
{
if((sfd = client[i]) < 0)
{
continue;
}
if(FD_ISSET(sfd, &rset))
{
printf("客户端sfd = %d已经成功链接\n",sfd);
n = read(sfd,&temp,sizeof(stChat));
if(n == 0)
{
printf("客户端sfd = %d已经离开本服务器. \n",sfd);
delete_online_db(db,&errmsg,sfd);
fflush(stdout); /* 刷新 输出终端 */
close(sfd);
FD_CLR(sfd, &allset); /*清空连接描述符数组*/
client[i] = -1;
}
else
{
temp.sockfd = sfd;
/* 将客户端地址转换成字符串 */
inet_ntop(AF_INET, &cin.sin_addr, addr_p, sizeof(addr_p));
addr_p[strlen(addr_p)] = '\0';
/*打印客户端地址 和 端口号*/
printf("客户端的Ip是%s, 端口是 %d\n",addr_p,ntohs(cin.sin_port));
int revert ;
revert = cmd_user(db,&errmsg,&temp,sfd);
temp.revert = revert;
printf("开始向客户端发送命令!\n");
// printf("以下为命令结构体！\n");
// display(temp);
if(revert < 5)
{
mywrite(&temp);
}
else if(revert == DATAOK)
{
read_data(db,&errmsg,&temp);//向在线用户发送信息
}
else if(revert == SEEOK)
{
read_online_all(db,&errmsg,&temp);//向在线用户发送信息
}
else if(revert == ALLOK || revert == SMILEOK || revert == WELCOMEOK)
{
write_online_all(db,&errmsg,&temp);
}
printf("发送完毕!\n");
memset(&temp,0,sizeof(stChat));//清空发送数据结构体
/* 谐函数出错 */
if(n == 1)
{
exit(1);
}
}
/*如果没有可以读的套接字 退出循环*/
if(--rdy <= 0)
{
break;
}
}
}
}
close(lfd); /* 关闭链接套接字 */
return 0;
}
项目地址
其实它就在我的github里面。你可怜点击链接进入，当然希望您在看的过程中能够followe me 一下，感谢！