Diccionario en línea (servidor, servicio al cliente, Makefile)

servidor:
/ * ============================================ ==================
*

• Nombre de archivo: servidor de diccionario en línea v1.0.c
• Creador: xiaowang
• Fecha de creación: 28 de abril de 2020
• Descripción:

================================================ ============== * /
#include <stdio.h>
#include <stdlib.h>
#include <sys / types.h>
#include <sys / socket.h>
#include <netinet / in.h>
#include <arpa / inet.h>
#include <string.h>
#include <unistd.h>
#include <sqlite3.h>
#include <signal.h>
#include <time.h >
#include <sys / wait.h>
#include <unistd.h>

#define N 32

#define R 1 // usuario - registro
#define L 2 // usuario - inicio de sesión
#define Q 3 // usuario - consulta
#define H 4 // usuario - historial

#define DATABASE “my.db”

// Definir la estructura de la información
typedef struct { int type; char name [N]; char data [256]; } atributo ((empaquetado)) MSG;

int do_client (int acceptfd, sqlite3 * db);
void do_register (int acceptfd, MSG * msg, sqlite3 * db);
int do_login (int acceptfd, MSG * msg, sqlite3 db);
int do_query (int acceptfd, MSG msg, sqlite3 db);
int do_history (int acceptfd, MSG msg, sqlite3 db);
int history_callback (void arg, int f_num, char f_value, char f_name);
int do_searchword (int acceptfd, MSG * msg, char word []);
int get_date (char * fecha);

void sig_child_handle (int signo)
{ if (SIGCHLD == signo) waitpid (-1, NULL, WNOHANG); }

// 0 función principal
int main (int argc, const char * argv [])
{

int sockfd;
int n;
MSG  msg;
sqlite3 *db;
int acceptfd;
pid_t pid;
char *errmsg;

if(argc != 3)
{
	printf("Usage:%s serverip  port.\n", argv[0]);
	return -1;
}
/*************************************************/
//打开数据库
if(sqlite3_open(DATABASE, &db) != SQLITE_OK)
{
	printf("%s\n", sqlite3_errmsg(db));
	return -1;
}
else
	printf("open DATABASE success.\n");

if(sqlite3_exec(db, 
			"create table if not exists usr(name text primary key,pass text);",
			//primary key主关键字只能有一个
			NULL, NULL, &errmsg) != SQLITE_OK)
{
	printf("%s\n", errmsg);
}
else
	printf("Create or open usr table success.\n");

if(sqlite3_exec(db, 
			"create table if not exists record(name text ,data text,word text);",
			NULL, NULL, &errmsg) != SQLITE_OK)
{
	printf("%s\n", errmsg);
}
else
	printf("Create or open record table success.\n");
/*************************************************/

if((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0)
{
	perror("fail to socket.\n");
	return -1;
}

struct sockaddr_in  serveraddr;
bzero(&serveraddr, sizeof(serveraddr));
serveraddr.sin_family = AF_INET;
serveraddr.sin_addr.s_addr = inet_addr(argv[1]);
serveraddr.sin_port = htons(atoi(argv[2]));

if(bind(sockfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr)) < 0)
{
	perror("fail to bind.\n");
	return -1;
}

// 将套接字设为监听模式
if(listen(sockfd, 5) < 0)
{
	printf("fail to listen.\n");
	return -1;
}

//处理僵尸进程
signal(SIGCHLD,sig_child_handle);

while(1)
{
	if((acceptfd = accept(sockfd, NULL, NULL)) < 0)
	{
		perror("fail to accept");
		return -1;
	}

	if((pid = fork()) < 0)
	{
		perror("fail to fork");
		return -1;
	}
	else if(pid == 0)  // 儿子进程
	{
		//处理客户端具体的消息
		close(sockfd);
		do_client(acceptfd, db);

	}
	else  // 父亲进程,用来接受客户端的请求的
	{
		close(acceptfd);
	}
}

return 0;

}

// 1 登陆
int do_client (int acceptfd, sqlite3 * db)
{ MSG msg; while (recv (acceptfd, & msg, sizeof (msg), 0)> 0) { printf ("tipo:% d \ n", msg.type); switch (msg.type) { caso R: do_register (acceptfd, & msg, db); descanso; caso L: do_login (acceptfd, & msg, db); descanso; caso Q: do_query (acceptfd, & msg, db); descanso; caso H: do_history (acceptfd, & msg, db); descanso; predeterminado: printf ("Mensaje de datos no válido. \ n"); }

}

printf("client exit.\n");
close(acceptfd);
exit(0);

return 0;

}

// 2 注册
void do_register (int acceptfd, MSG * msg, sqlite3 * db)
{ char * errmsg; char sql [500]; int ret = -1;

sprintf(sql, "insert into usr values('%s', %s);", msg->name, msg->data);
printf("%s\n", sql);

if(sqlite3_exec(db,sql, NULL, NULL, &errmsg) != SQLITE_OK)
{
	printf("%s\n", errmsg);
	strcpy(msg->data, "usr name already exist.");
}
else
{
	printf("client  register ok!\n");
	strcpy(msg->data, "OK!");
}

do{
	ret = send(acceptfd,msg,sizeof(MSG),0);
}while(ret <0 && EINTR==errno);
if(ret < 0)
{
	perror("fail to send");
	return ;
}

return ;

}

// 3 登陆
int do_login (int acceptfd, MSG * msg, sqlite3 * db)
{ char sql [500] = {}; char * errmsg; int nrow; int ncloumn; char ** resultp;

sprintf(sql, "select * from usr where name = '%s' and pass = '%s';", msg->name, msg->data);
printf("%s\n", sql);

if(sqlite3_get_table(db, sql, &resultp, &nrow, &ncloumn, &errmsg)!= SQLITE_OK)
{
	printf("%s\n", errmsg);
	return -1;
}
else
	printf("get_table ok!\n");

// 查询成功，数据库中拥有此用户
if(nrow == 1)
{
	strcpy(msg->data, "OK");
	send(acceptfd, msg, sizeof(MSG), 0);
	return 1;
}

if(nrow == 0) // 密码或者用户名错误
{
	strcpy(msg->data,"usr/passwd wrong.");
	send(acceptfd, msg, sizeof(MSG), 0);
}

return 0;

}

// 3 查询
int do_query (int acceptfd, MSG * msg, sqlite3 * db)
{ char palabra [64]; int encontrado = 0; char fecha [128] = {}; char sql [500] = {}; char * errmsg;

//拿出msg结构体中，要查询的单词
strcpy(word, msg->data);

found = do_searchword(acceptfd, msg, word);
printf("查询一个单词完毕.\n");

// 表示找到了单词，那么此时应该将 用户名，时间，单词，插入到历史记录表中去。
if(found == 1)
{
	//需要获取系统时间
	get_date(date);

	sprintf(sql, "insert into record values('%s','%s','%s')",msg->name,date, word);

	if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
	{
		printf("%s\n", errmsg);
		return -1;
	}
	else
	{
		printf("Insert record done.\n");
	}

}
else  //表示没有找到
	strcpy(msg->data, "Not found!");

// 将查询的结果，发送给客户端
send(acceptfd, msg, sizeof(MSG), 0);

return 0;

}

//3.1 Abra el archivo para buscar palabras
int do_searchword (int acceptfd, MSG * msg, char word [])
{ FILE * fp; int len ​​= 0; char temp [512] = {}; int result; char * p; // Abra el archivo que almacena la palabra if ((fp = fopen ("dict.txt", "r")) == NULL) { perror ("fail to fopen. \ N"); strcpy (msg-> data, "Failed to open dict.txt ”); enviar (acceptfd, msg, sizeof (MSG), 0); return -1; }

//打印出，客户端要查询的单词
len = strlen(word);
printf("%s , len = %d\n", word, len);

//读文件，来查询单词
while(fgets(temp,512, fp) != NULL)
{
	//比较文件读到的单词前len位
	// abandon  ab
	result = strncmp(temp,word,len);
	if(result < 0)
		continue;
	//如果客户端输入的与查询到的一样
	//进一步判断避免出现查询到多个结果
	//例如查询abandon，结果出现abandonment这样结果
	if(result > 0 || ((result == 0) && (temp[len]!=' ')))
		break;
	//如果执行到这里说明
	// 找到了要查询的单词
	// 接下来就是要把单词后面的解释发送出去
	p = temp + len; //  abandon   v.akdsf dafsjkj 
	//让指针移动到解释的开头位置
	while(*p == ' ')
		p++;
	//将解释填入到消息结构体中
	strcpy(msg->data, p);
	printf("found word:%s\n", msg->data);

	// 注释拷贝完毕之后，应该关闭文件
	fclose(fp);
	return 1;
}
fclose(fp);
return 0;

}

//3.2 obtener fecha int get_date (char * date)
{ time_t t; struct tm * tp;

time(&t);

//进行时间格式转换
tp = localtime(&t);

sprintf(date, "%d-%d-%d %d:%d:%d", tp->tm_year + 1900, tp->tm_mon+1, tp->tm_mday, 
		tp->tm_hour, tp->tm_min , tp->tm_sec);
printf("get date:%s\n", date);

return 0;

}

// 4. Historial de consultas
int do_history (int acceptfd, MSG * msg, sqlite3 * db)
{ char sql [128] = {}; char * errmsg;

sprintf(sql, "select * from record where name = '%s'", msg->name);

//查询数据库
if(sqlite3_exec(db, sql, history_callback,(void *)&acceptfd, &errmsg)!= SQLITE_OK)
	printf("%s\n", errmsg);
else
	printf("Query record done.\n");

// 所有的记录查询发送完毕之后，给客户端发出一个结束信息
msg->data[0] = '\0';

send(acceptfd, msg, sizeof(MSG), 0);

return 0;

}

//4.1 Función de devolución de llamada de resultado histórico
// Obtiene el resultado de la consulta y es necesario enviar el registro histórico al cliente
int history_callback (void * arg, int f_num, char ** f_value, char ** f_name)
{ // record, name, fecha, palabra int acceptfd; MSG msg;

acceptfd = *((int *)arg);

sprintf(msg.data, "%s , %s", f_value[1], f_value[2]);

send(acceptfd, &msg, sizeof(MSG), 0);

return 0;

}

cliente:
/ * ============================================ ==================

• Nombre de archivo: cliente de diccionario en línea v1.0.c
• Creador: xiaowang
• Fecha de creación: 28 de abril de 2020
• Descripción:

================================================ ============== * /
#include <stdio.h>
#include <stdlib.h>
#include <sys / types.h>
#include <sys / socket.h>
#include <netinet / in.h>
#include <arpa / inet.h>
#include <string.h>
#include <unistd.h>

#define N 32

#define R 1 // usuario - registro
#define L 2 // usuario - inicio de sesión
#define Q 3 // usuario - consulta
#define H 4 // usuario - historial

// Definir la estructura de la información
typedef struct { int type; char name [N]; char data [256]; } atributo ((empaquetado)) MSG;

int do_register (int sockfd, MSG * msg);
int do_login (int sockfd, MSG * msg);
int do_login_select (int sockfd, MSG * msg);
int do_query (int sockfd, MSG * msg);
int do_history (int sockfd, MSG * msg);

int main (int argc, const char * argv [])
{

int sockfd;
int n;
MSG  msg;

if(argc != 3)
{
	printf("Usage:%s serverip  port.\n", argv[0]);
	return -1;
}

if((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0)
{
	perror("fail to socket.\n");
	return -1;
}

struct sockaddr_in  serveraddr;
bzero(&serveraddr, sizeof(serveraddr));
serveraddr.sin_family = AF_INET;
serveraddr.sin_addr.s_addr = inet_addr(argv[1]);
serveraddr.sin_port = htons(atoi(argv[2]));

if(connect(sockfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr)) < 0)
{
	perror("fail to connect");
	return -1;
}

char buf[100]={};
while(1)
{
	printf("*****************************************************************\n");
	printf("* 1.register          2.login              3.quit               *\n");
	printf("*****************************************************************\n");
	printf("Please choose:");

	if(1 != scanf("%d",&n)){
		puts("***输入错误重新输入");
		continue;
	}
	while(getchar() != '\n'); 

	switch(n)
	{
		case 1:
			do_register(sockfd, &msg);
			break;
		case 2:
			if(do_login(sockfd, &msg) == 1)
			{
				if(do_login_select(sockfd, &msg) == 1)
					puts("用户注销");
				else
					puts("未知错误");
			}
			break;
		case 3:
			close(sockfd);
			return 0;
			break;
		default:
			printf("输入非法命令.\n");
	}
}

return 0;

}

/ Registrarse ********************************************* ** /

int do_register (int sockfd, MSG * msg)
{ msg-> tipo = R;

printf("Input name:");
scanf("%s", msg->name);
getchar();

printf("Input passwd:");
scanf("%s", msg->data);
getchar();

if(send(sockfd, msg, sizeof(MSG),0) < 0)
{
	printf("fail to send.\n");
	return -1;
}

if(recv(sockfd, msg, sizeof(MSG), 0) < 0)
{
	printf("Fail to recv.\n");
	return -1;
}

// ok !  or  usr alread exist.
printf("%s\n", msg->data);

return 0;

}

/ 登陆 ******************************* /
int do_login (int sockfd, MSG * msg)
{ msg-> type = L;

printf("Input name:");
scanf("%s", msg->name);
getchar();

printf("Input passwd:");
scanf("%s", msg->data);
getchar();

if(send(sockfd, msg, sizeof(MSG),0) < 0)
{
	printf("fail to send.\n");
	return -1;
}

if(recv(sockfd, msg, sizeof(MSG), 0) < 0)
{
	printf("Fail to recv.\n");
	return -1;
}

if(strncmp(msg->data, "OK", 3) == 0)
{
	printf("Login ok!\n");
	return 1;
}
else 
{
	printf("%s\n", msg->data);
}

return 0;

}

/ Opciones de inicio de sesión ************************************** /
int do_login_select (int sockfd, MSG msg)
{ int n = -1; while (1) { printf ("******************************* ******************** \ n "); printf ("




1.query_word 2.history_record 3.quit * \ n ");
printf (" **** *********************************************** \ n ");
printf (" Por favor, elija: ");
if (1! = scanf ("% d ", & n)) { put (" *** error de entrada reingresar "); continuar; } while (getchar () ! = '\ n');

	switch(n)
	{
		case 1:
			do_query(sockfd, msg);
			break;
		case 2:
			do_history(sockfd, msg);
			break;
		case 3:
			return 1;
			break;
		default :
			printf("***输入非法.\n");
	}

}
return 0;

}

/ 查询 *********************************** /
int do_query (int sockfd, MSG * msg)
{ msg-> tipo = Q; pone("--------------");

while(1)
{
	printf("Input word:");
	scanf("%s", msg->data);
	getchar();

	//客户端，输入#号，返回到上一级菜单
	if(strncmp(msg->data, "#", 1) == 0)
		break;

	//将要查询的单词发送给服务器
	if(send(sockfd,msg, sizeof(MSG), 0) < 0)
	{
		printf("Fail to send.\n");
		return -1;
	}

	// 等待接受服务器，传递回来的单词的注释信息
	if(recv(sockfd, msg,sizeof(MSG), 0) < 0)
	{
		printf("Fail to recv.\n");
		return -1;
	}
	printf("%s\n", msg->data);
}
return 0;

}

/ Historial ********************************** /
int do_history (int sockfd, MSG * msg)
{

msg->type = H;

send(sockfd, msg, sizeof(MSG), 0);

// 接受服务器，传递回来的历史记录信息
while(1)
{
	recv(sockfd, msg, sizeof(MSG), 0);

	if(msg->data[0] == '\0')
		break;

	//输出历史记录信息
	printf("%s\n", msg->data);
}

return 0;

}

Makefile:
todos:
gcc server.c -o server -lsqlite3
gcc client.c -o client
.PHONY: clean
clean:
rm server client my.db

También tenga una base de datos de diccionarios, descárguela en línea