SQLite实现在线电子词典
需求：
服务器：
1）.提供英英方式的单词查询
2）.同时记录用户的查询历史
2）.客户机登陆需要密码
客户机：
1）.登陆需要密码， 并且提供注册新用户功能， 注意在用户输入密码的时候不能显示密码，就像linux登陆时的那样
2）.用户的查询即时给予回复
3）.用户可以查询自己的查询历史
4）.用户也可以清除自己的历史记录
下面是源码， 由于时间仓促，代码难免比较粗糙，希望谅解！
server.h:
/************************************************************************* > File Name: server.h > Author: Baniel Gao > Mail: [email protected] > Created Time: Wed 15 Jan 2014 09:39:40 AM CST ************************************************************************/ #include <stdio.h> #include <stdlib.h> #include <termios.h> #include <unistd.h> #include <string.h> #include <sqlite3.h> #include <errno.h> #include <error.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> #include <netinet/in.h> #include <netinet/ip.h> #include <signal.h> #define BUFF_SIZE 32 /*The len of sql*/ #define SQL_LEN 512 /*The max len of username*/ #define MAX_USERNAME 256 /*The max len of word and password*/ #define MAX_WORD 128 /*The max len of explaintion to word*/ #define EXP_LEN 1024 /*The flag of status * R for register * L for login * Q for quary * H for history * S for client stop * C for clear history * */ #define R 1 #define L 2 #define Q 3 #define H 4 #define S 5 #define C 6 /*flags to show user status*/ #define ON_LINE 1 #define OFF_LINE 0 /*network infomation*/ #define SERVER_IP "0.0.0.0" #define SERVER_PORT 50000 /*text dictionary path*/ #define DIC_PATH "./dict/dic.txt" /*system and user log path */ #define SYS_LOG "./log/sys.log" #define USER_LOG "./log/user.log" /*flags to set term display mode*/ #define ECHOFLAGS (ECHO | ECHOE | ECHOK | ECHONL) /*error handler function*/ #define error_exit(_errmsg_) error(EXIT_FAILURE, errno, _errmsg_) /*client message struct*/ typedef struct _client_msg_ { char type; char name[MAX_USERNAME]; char data[MAX_WORD]; } climsg_st; /*server message struct*/ typedef struct _server_msg_ { char type; char text[EXP_LEN]; } sermsg_st; /*functions to deal user quary*/ void menu(void); void login_reg(void); int show_history(sqlite3 *db, int connfd); int clear_history(sqlite3 *db, int connfd); int login(sqlite3 *db, int connfd); int logout(sqlite3 *db, int connfd); int regist(sqlite3 *db, int connfd); int set_disp_mode(int fd,int option); int quary(sqlite3 *db, int connfd);
server.c:
/************************************************************************* > File Name: server.c > Author: Baniel Gao > Mail: [email protected] > Blog: blog.csdn.net/createchance > Created Time: Wed 15 Jan 2014 11:52:12 AM CST ************************************************************************/ #include "server.h" /*client and server message struct*/ climsg_st climsg; sermsg_st sermsg; int main(void) { FILE *dictfp, *sysfp, *userfp; int sockfd, connfd; int ret; int lines = 0, alllines = 19661; pid_t pid; struct sockaddr_in server_addr, client_addr; socklen_t addrlen; sqlite3 *db; char explain[EXP_LEN]; char *token; char sql[SQL_LEN]; char *errmsg; /*open local database my.db*/ if (0 != sqlite3_open("my.db", &db)) { printf("error: %s \n", sqlite3_errmsg(db)); return -1; } /*open local text dictionary for read*/ if (NULL == (dictfp = fopen(DIC_PATH, "r"))) error_exit("fopen"); /*open system log for append*/ if (NULL == (sysfp = fopen(SYS_LOG, "a"))) error_exit("fopen"); /*open user log for append*/ if (NULL == (userfp = fopen(USER_LOG, "a"))) error_exit("fopen"); /*import the dictionary from local text dictionary*/ while (1) { system("clear"); printf("Importing data...\n"); if (NULL == fgets(explain, EXP_LEN, dictfp)) break; printf("\e[32m%.1f%% done!\e[0m \n", (lines++) * 100.0 / alllines); token = strtok(explain, " "); sprintf(sql, "insert into dictionary values(\"%s\", \"%s\");", token, explain + 17); if (0 != (ret = sqlite3_exec(db, sql, NULL, NULL, &errmsg))) { if (19 != ret) { printf("error: %s \n", errmsg); return -1; } } } printf("Import done! \n"); /*create and open a socket for accept client connect*/ if (-1 == (sockfd = socket(AF_INET, SOCK_STREAM, 0))) error_exit("socket"); server_addr.sin_family = AF_INET; server_addr.sin_port = htons(SERVER_PORT); server_addr.sin_addr.s_addr = inet_addr(SERVER_IP); addrlen = sizeof(server_addr); /*server needs to bind the opening socket to local address*/ if (-1 == bind(sockfd, (const struct sockaddr *)&server_addr, addrlen)) error_exit("bind"); /*server listen on the socket*/ if (-1 == listen(sockfd, 10)) error_exit("listen"); /* make server to ingore the child process exit signal(SIGCHLD), * this can help to avoid zombie process * */ signal(SIGCHLD, SIG_IGN); while (1) { /*when there is a connection has come, accept to deal it*/ if (-1 == (connfd = accept(sockfd, (struct sockaddr *)&client_addr, &addrlen))) error_exit("accept"); /*create child process to handler client quary*/ if (-1 == (pid = fork())) error_exit("fork"); if (pid == 0) { while (1) { if (-1 == recv(connfd, &climsg, sizeof(climsg), 0)) error_exit("recv"); if (S == climsg.type) { logout(db, connfd); exit(0); } else if (L == climsg.type) login(db, connfd); else if (R == climsg.type) regist(db, connfd); else if (Q == climsg.type) quary(db, connfd); else if (H == climsg.type) show_history(db, connfd); else if (C == climsg.type) clear_history(db, connfd); } } else { close(connfd); } } return 0; } int regist(sqlite3 *db, int connfd) { char regist[SQL_LEN]; char *errmsg; sprintf(regist, "insert into userstat values('%s', '%s');", climsg.name, climsg.data); if (SQLITE_OK != sqlite3_exec(db, regist, NULL, NULL, &errmsg)) { sermsg.type = -1; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } else { sermsg.type = 0; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } sprintf(regist, "insert into userstat values('%s', %d);", climsg.name, OFF_LINE); if (SQLITE_OK != sqlite3_exec(db, regist, NULL, NULL, &errmsg)) { printf("error: %s \n", errmsg); } return 0; } int login(sqlite3 *db, int connfd) { char login[SQL_LEN]; int nrow, ncol; char *errmsg; char **resultp; sprintf(login, "select * from userstat where username='%s' and status=%d;", climsg.name, OFF_LINE); if (0 != sqlite3_get_table(db, login, &resultp, &nrow, &ncol, &errmsg)) printf("error: %s \n", errmsg); if (0 == nrow) { sermsg.type = -2; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); return -1; } sprintf(login, "select * from user where username='%s' and password='%s';", climsg.name, climsg.data); if (0 != sqlite3_get_table(db, login, &resultp, &nrow, &ncol, &errmsg)) printf("error: %s \n", errmsg); if (1 != nrow) { sermsg.type = -1; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } else { sermsg.type = 0; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } sprintf(login, "update userstat set status=%d where username='%s';", ON_LINE, climsg.name); if (SQLITE_OK != sqlite3_exec(db, login, NULL, NULL, &errmsg)) printf("error: %s \n", errmsg); return 0; } int logout(sqlite3 *db, int connfd) { char logout[SQL_LEN]; char *errmsg; sprintf(logout, "update userstat set status=%d where username='%s';", OFF_LINE, climsg.name); if (SQLITE_OK != sqlite3_exec(db, logout, NULL, NULL, &errmsg)) printf("error: %s \n", errmsg); return 0; } int quary(sqlite3 *db, int connfd) { char quary[SQL_LEN]; int nrow, ncol; char *errmsg; char **resultp; sprintf(quary, "select explain from dictionary where word='%s';", climsg.data); if (0 != sqlite3_get_table(db, quary, &resultp, &nrow, &ncol, &errmsg)) printf("error: %s \n", errmsg); if (0 == nrow) { sermsg.type = -1; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } else { sermsg.type = 0; sprintf(sermsg.text, "%s", resultp[1]); if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } sprintf(quary, "insert into history values('%s', '%s');", climsg.name, climsg.data); if (SQLITE_OK != sqlite3_exec(db, quary, NULL, NULL, &errmsg)) printf("error to write history\n"); return 0; } int show_history(sqlite3 *db, int connfd) { char show[SQL_LEN]; int i; int nrow, ncol; char *errmsg; char **resultp; sprintf(show, "select word from history where username='%s';", climsg.name); if (0 != sqlite3_get_table(db, show, &resultp, &nrow, &ncol, &errmsg)) printf("error: %s \n", errmsg); if (0 == nrow) { sermsg.type = -1; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } else { for (i = 1; i <= nrow; i++) { sermsg.type = 0; sprintf(sermsg.text, "%s", resultp[i]); printf("%s \n", sermsg.text); if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } sprintf(sermsg.text, "NULL"); printf("%s \n", sermsg.text); if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } return 0; } int clear_history(sqlite3 *db, int connfd) { char clear[SQL_LEN]; char *errmsg; sprintf(clear, "delete from history where username='%s';", climsg.name); if (SQLITE_OK != sqlite3_exec(db, clear, NULL, NULL, &errmsg)) { printf("error to clear history\n"); sermsg.type = -1; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } else { sermsg.type = 0; if (-1 == send(connfd, &sermsg, sizeof(sermsg), 0)) error_exit("send"); } return 0; }
client.h:
/************************************************************************* > File Name: client.h > Author: Baniel Gao > Mail: [email protected] > Created Time: Wed 15 Jan 2014 09:39:40 AM CST ************************************************************************/ #include <stdio.h> #include <stdlib.h> #include <termios.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <error.h> #include <sys/types.h> #include <sys/socket.h> #include <arpa/inet.h> #include <netinet/in.h> #include <netinet/ip.h> #define BUFF_SIZE 32 #define SQL_LEN 512 #define MAX_USERNAME 256 #define MAX_WORD 128 #define RET_SIZE 1024 #define R 1 #define L 2 #define Q 3 #define H 4 #define S 5 /*clear history*/ #define C 6 #define SERVER_IP "192.168.140.10" #define SERVER_PORT 50000 #define ECHOFLAGS (ECHO | ECHOE | ECHOK | ECHONL) #define error_exit(_errmsg_) error(EXIT_FAILURE, errno, _errmsg_) typedef struct _client_msg_ { char type; char name[MAX_USERNAME]; char data[MAX_WORD]; } climsg_st; typedef struct _server_msg_ { char type; char text[RET_SIZE]; } sermsg_st; void menu(void); void login_reg(void); int insert(int sockfd); int delete(int sockfd); int show_history(int sockfd); int clear_history(int sockfd); int login(int sockfd); int logout(int sockfd); int regist(int sockfd); int set_disp_mode(int fd,int option); int quary(int sockfd);
client.c:
/************************************************************************* > File Name: client.c > Author: Baniel Gao > Mail: [email protected] > Blog: blog.csdn.net/createchance > Created Time: Tue 14 Jan 2014 01:33:49 PM CST ************************************************************************/ #include "client.h" climsg_st climsg; sermsg_st sermsg; int main(void) { char choice[BUFF_SIZE]; int fail_times = 0; int ret; int sockfd; struct sockaddr_in server_addr; socklen_t addrlen; if (-1 == (sockfd = socket(AF_INET, SOCK_STREAM, 0))) error_exit("socket"); server_addr.sin_family = AF_INET; server_addr.sin_port = htons(SERVER_PORT); server_addr.sin_addr.s_addr = inet_addr(SERVER_IP); addrlen = sizeof(server_addr); if (-1 == connect(sockfd, (const struct sockaddr *)&server_addr, addrlen)) error_exit("connect"); while (1) { login_reg(); while (1) { printf("Please input: "); if (strcmp("\n", fgets(choice, BUFF_SIZE, stdin)) && (2 == strlen(choice))) break; } switch (choice[0]) { case '1': if (!strcmp(choice, "1\n")) while (-1 == (ret = login(sockfd)) || -2 == ret) { if (-1 == ret) { printf("\n\e[31musername or password wrong!\e[0m \n"); fail_times++; } else printf("\n\e[31m%s has already login!\e[0m \n", climsg.name); if (3 <= fail_times) { printf("\n\e[32mHave no account? Please join us! Do you want to register?(Yes/No):\e[0m "); if (!strcmp("Yes\n", fgets(choice, BUFF_SIZE, stdin)) || !strcmp("yes\n", choice)) { while (-1 == regist(sockfd)) printf("\n\e[31musername has been registered!\e[0m \n"); printf("\n\e[32mLet's login now!\e[0m\n"); } } } break; case '2': while (-1 == regist(sockfd)) printf("\n\e[31musername has been registered!\e[0m \n"); printf("\n\e[32mLet's login now!\e[0m\n"); while (-1 == (ret = login(sockfd))) printf("\n\e[31musername or password wrong!\e[0m \n"); break; case '3': return 0; default: printf("\e[31mUnknown choice!\e[0m \n"); } if (0 == ret) break; } while (1) { while (1) { menu(); printf("Your choice: "); if (strcmp("\n", fgets(choice, BUFF_SIZE, stdin)), 2 == strlen(choice)) break; } switch (choice[0]) { case '1': quary(sockfd); break; case '2': show_history(sockfd); break; case '3': clear_history(sockfd); break; case '4': logout(sockfd); return 0; default: printf("\e[31mUnknown choice!\e[0m \n"); } } return 0; } int set_disp_mode(int fd,int option) { int err; struct termios term; if(tcgetattr(fd,&term)==-1){ perror("Cannot get the attribution of the terminal"); return 1; } if(option) term.c_lflag|=ECHOFLAGS; else term.c_lflag &=~ECHOFLAGS; err=tcsetattr(fd,TCSAFLUSH,&term); if(err==-1 && err==EINTR){ perror("Cannot set the attribution of the terminal"); return 1; } return 0; } int regist(int sockfd) { char password_cfm[MAX_WORD]; printf("\e[32mJoin us! Just one minute!\e[0m \n"); while (1) { printf("username: "); if (strcmp("\n", fgets(climsg.name, MAX_USERNAME, stdin))) break; } climsg.name[strlen(climsg.name) - 1] = '\0'; set_disp_mode(STDIN_FILENO, 0); while (1) { printf("password: "); if (!strcmp("\n", fgets(climsg.data, MAX_WORD, stdin))) continue; printf("\nRetype password: "); fgets(password_cfm, BUFF_SIZE, stdin); if (!strcmp(climsg.data, password_cfm)) break; else printf("\n\e[31mpassword does not match!\e[0m \n"); } climsg.data[strlen(climsg.data) - 1] = '\0'; climsg.type = R; set_disp_mode(STDIN_FILENO, 1); if (-1 == send(sockfd, &climsg, sizeof(climsg_st), 0)) { printf("Network failure! \n"); return -1; } if (-1 == recv(sockfd, &sermsg, sizeof(sermsg_st), 0)) printf("Network failure! \n"); if (-1 == sermsg.type) return -1; printf("\n\e[32mregister done!\e[0m \n"); return 0; } int logout(int sockfd) { climsg.type = S; if (-1 == send(sockfd, &climsg, sizeof(climsg_st), 0)) { printf("Network failure! \n"); return -1; } return 0; } int login(int sockfd) { while (1) { printf("username: "); if (strcmp("\n", fgets(climsg.name, MAX_USERNAME, stdin))) break; } climsg.name[strlen(climsg.name) - 1] = '\0'; set_disp_mode(STDIN_FILENO, 0); while (1) { printf("password: "); if (strcmp("\n", fgets(climsg.data, MAX_WORD, stdin))) break; } climsg.data[strlen(climsg.data) - 1] = '\0'; climsg.type = L; set_disp_mode(STDIN_FILENO, 1); if (-1 == send(sockfd, &climsg, sizeof(climsg_st), 0)) { printf("Network failure! \n"); return -1; } if (-1 == recv(sockfd, &sermsg, sizeof(sermsg_st), 0)) printf("Network failure! \n"); if (-1 == sermsg.type) return -1; else if (-2 == sermsg.type) return -2; printf("\n\e[32mWelcome %s!\e[0m \n", climsg.name); return 0; } void login_reg(void) { printf("*********************************\n"); printf("* 1.login 2.register 3.quit *\n"); printf("*********************************\n"); } void menu(void) { printf("\e[35m****************************************************\n"); printf("* 1.quary 2.show history 3.clear history 4.quit*\n"); printf("****************************************************\e[0m\n"); } int show_history(int sockfd) { climsg.type = H; if (-1 == send(sockfd, &climsg, sizeof(climsg), 0)) { printf("\e[31mNetwork failure!\e[0m \n"); return -1; } printf("\e[33m-----------------\n"); while (1) { if (-1 == recv(sockfd, &sermsg, sizeof(sermsg), 0)) { printf("\e[31mNetwork failure!\e[0m \n"); return -1; } if (-1 == sermsg.type) { printf("\e[31mNo history found!\e[0m \n"); break; } if (!strcmp("NULL", sermsg.text)) break; printf("|\t%s\t|\n", sermsg.text); } printf("\e[33m-----------------\e[0m\n\n"); return 0; } int clear_history(int sockfd) { climsg.type = C; if (-1 == send(sockfd, &climsg, sizeof(climsg), 0)) { printf("\e[31mNetwork failure!\e[0m \n"); return -1; } if (-1 == recv(sockfd, &sermsg, sizeof(sermsg), 0)) { printf("\e[31mNetwork failure!\e[0m \n"); return -1; } if (0 == sermsg.type) printf("\e[32mClear done!\e[0m \n"); else printf("\e[31mClear failed!\e[0m \n"); return 0; } int quary(int sockfd) { int i; while (1) { printf("Input the word: "); if (!strcmp("\n", fgets(climsg.data, MAX_WORD, stdin))) continue; if (!strcmp("#\n", climsg.data)) return -1; climsg.data[strlen(climsg.data) - 1] = '\0'; for (i = 0; i < strlen(climsg.data); i++) { if (climsg.data[i] >= 'A' && climsg.data[i] <= 'Z') climsg.data[i] = climsg.data[i] + ' '; else if (climsg.data[i] >= 'a' && climsg.data[i] <= 'z') continue; else break; } if (i != strlen(climsg.data)) { printf("\e[31mInput invalid!\e[0m \n"); continue; } else break; } climsg.type = Q; if (-1 == send(sockfd, &climsg, sizeof(climsg), 0)) { printf("\e[31mNetwork failure!\e[0m \n"); return -1; } if (-1 == recv(sockfd, &sermsg, sizeof(sermsg), 0)) printf("\e[31mNetwork failure!\e[0m \n"); if (0 == sermsg.type) { printf("\e[33m----------------------------------------------------------------\n"); printf("|%s\t| %s\n", climsg.data, sermsg.text); printf("----------------------------------------------------------------\e[0m\n"); } else printf("\e[31mSorry, %s not found!\e[0m \n", climsg.data); return 0; }
以下是客户端的运行效果：
登陆：
查询：
查询历史记录：
删除历史记录：
