网络编程项目（云词典项目）

目录

一、功能要求

服务器

用户客户端

二、演示效果 

1.登录、注册功能

2. 查单词功能

3.查看历史纪录功能

三、项目代码 

1.头文件

2.服务器

3.用户端

一、功能要求

仿照云词典的原理，实现云词典功能，用户可以查询输入的单词的英文解释，也可以查看历史记录。

服务器

处理客户端的请求，并将数据存入数据库中，客户端请求的数据从数据库进行获取，服务器转发给客户端。

用户客户端

实现账号的注册、登录功能，当登录成功时可以查单词、查看历史记录等功能。

二、演示效果 

1.登录、注册功能

2. 查单词功能

3.查看历史纪录功能

三、项目代码 

1.头文件

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sqlite3.h>
#include <signal.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/select.h>struct word_msg
{char word[20];   // 单词char parse[256]; // 含义
};typedef struct
{int acceptfd;         // 链接客户端unsigned char type;   // 功能类型 R:注册 L:登录 Q:查询 H:历史记录char name[32];        // 用户名char password[32];    // 密码char buf[1024];       // 调试信息struct word_msg msgg; // 单词信息
} MSG;

2.服务器

#include "head.h"fd_set readfds, tempfds;
sqlite3 *db;
MSG msg;void zhuce(MSG *msg);  // 注册
void denglu(MSG *msg); // 登录
void chaxun(MSG *msg); // 查询
void lishi(MSG *msg);  // 历史int main(int argc, char *argv[])
{if (argc != 2){printf("用法：<port>\n");return -1;}int sockfd = socket(AF_INET, SOCK_STREAM, 0);printf("sorkfd：%d\n", sockfd);struct sockaddr_in saddr, caddr;saddr.sin_family = AF_INET;saddr.sin_port = htons(atoi(argv[1]));saddr.sin_addr.s_addr = INADDR_ANY;socklen_t addrlen = sizeof(saddr);if (bind(sockfd, (struct sockaddr *)&saddr, addrlen) < 0){perror("bind失败");close(sockfd);return -1;}printf("bind成功\n");if (listen(sockfd, 7) < 0){perror("lisren失败");close(sockfd);return -1;}printf("listen成功\n");// 打开数据库if (sqlite3_open("./yuncidian.db", &db) < 0){printf("打开数据库失败: %s\n", sqlite3_errmsg(db));return -1;}FD_ZERO(&readfds);FD_ZERO(&tempfds);FD_SET(sockfd, &readfds);int max = sockfd;while (1){tempfds = readfds;int ret = select(max + 1, &tempfds, NULL, NULL, NULL);if (ret == -1){perror("select失败");close(sockfd);return -1;}if (FD_ISSET(sockfd, &tempfds)){int acceptfd = accept(sockfd, (struct sockaddr *)&caddr, &addrlen);if (acceptfd < 0){perror("accept失败\n");return -1;}printf("客户端ip：%s\t 端口号：%d\n", inet_ntoa(caddr.sin_addr), ntohs(caddr.sin_port));FD_SET(acceptfd, &readfds);if (max < acceptfd){max = acceptfd;}}for (int i = sockfd + 1; i <= max; i++){if (FD_ISSET(i, &tempfds)){int ret = recv(i, &msg, sizeof(msg), 0);msg.acceptfd = i;if (ret < 0){perror("recv失败");close(sockfd);return -1;}else if (ret == 0){printf("客户端acceptfd：%d退出\n", i);FD_CLR(i, &readfds);close(i);while (!FD_ISSET(max, &readfds)){max--;}}else{printf("%c\n", msg.type);switch (msg.type){case 'R':zhuce(&msg);break;case 'L':denglu(&msg);break;case 'Q':chaxun(&msg);break;case 'H':lishi(&msg);break;default:break;}}}}}return 0;
}void zhuce(MSG *msg) // 注册
{memset(msg->buf, 0, sizeof(msg->buf));char *errmsg = NULL;char sql[128];char check_sql[128];char **result = NULL;int rows, columns;while (1){ // 检查用户名是否已存在sprintf(check_sql, "select * from user where name='%s';", msg->name);if (sqlite3_get_table(db, check_sql, &result, &rows, &columns, &errmsg) != 0){sprintf(msg->buf, "查询失败: %s", errmsg);break;}if (rows > 0){sprintf(msg->buf, "用户名已存在");break;}// 执行插入操作sprintf(sql, "insert into user values('%s','%s');", msg->name, msg->password);if (sqlite3_exec(db, sql, NULL, NULL, &errmsg) != 0){sprintf(msg->buf, "注册失败: %s", errmsg);break;}else{printf("%s\n", sql);sprintf(msg->buf, "注册成功");break;}}send(msg->acceptfd, msg->buf, sizeof(msg->buf), 0);
}
void denglu(MSG *msg) // 登录
{memset(msg->buf, 0, sizeof(msg->buf));char sql[128];char *errmsg = NULL;char **result = NULL;int rows, columns;while (1){sprintf(sql, "select * from user where name = '%s' and password = '%s';", msg->name, msg->password);// 执行 SQL 查询int sqlget = sqlite3_get_table(db, sql, &result, &rows, &columns, &errmsg);if (sqlget != 0){sprintf(msg->buf, "sqlite3_get_table错误%s", errmsg);break;}else if (rows > 0){sprintf(msg->buf, "登录成功");break;}else{sprintf(msg->buf, "登录失败");break;}}send(msg->acceptfd, msg->buf, strlen(msg->buf), 0);
}
void chaxun(MSG *msg) // 查询
{memset(msg->buf, 0, sizeof(msg->buf));char sql[1024];char sql1[1024];char *errmsg = NULL;char **result = NULL;int rows, columns;time_t t;struct tm *timeinfo;char date[100];time(&t);timeinfo = localtime(&t);while (1){snprintf(date, sizeof(date), "%d-%d-%d %d:%d:%d", timeinfo->tm_year + 1900, timeinfo->tm_mon + 1, timeinfo->tm_mday, timeinfo->tm_hour, timeinfo->tm_min, timeinfo->tm_sec);snprintf(sql, sizeof(sql), "select parse from dic where word='%s';", msg->msgg.word);snprintf(sql1, sizeof(sql1), "insert into history values ('%s','%s','%s');", msg->name, date, msg->msgg.word);if (sqlite3_exec(db, sql1, NULL, NULL, &errmsg) != 0){sprintf(msg->buf, "放入历史记录失败: %s", errmsg);break;}printf("%s\n", sql1);int rc = sqlite3_get_table(db, sql, &result, &rows, &columns, &errmsg);if (rc != 0){sprintf(msg->buf, "查询失败: %s", errmsg);}else{if (rows > 0){for (int i = 1; i <= rows; ++i){strcat(msg->buf, "查询到的单词信息:");strcat(msg->buf, result[i * columns]);strcat(msg->buf, "\n");}printf("%s\n", sql);break;}else{strcpy(msg->buf, "没有找到该单词信息.");break;}}}send(msg->acceptfd, msg->buf, strlen(msg->buf) - 1, 0);
}
void lishi(MSG *msg) // 历史
{printf("%s\n", msg->name);char sql[1100];char *errmsg = NULL;char **result = NULL;int rows, columns;while (1){sprintf(sql, "select date,word from history where name='%s';", msg->name);memset(msg->buf, 0, sizeof(msg->buf));int rc = sqlite3_get_table(db, sql, &result, &rows, &columns, &errmsg);if (rc != 0){sprintf(msg->buf, "查询历史记录失败: %s", errmsg);break;}else{if (rows > 0){for (int i = 1; i <= rows; ++i){strcat(msg->buf, "查询到的信息:");for (int j = 0; j < columns; ++j){strcat(msg->buf, result[i * columns + j]);strcat(msg->buf, " ");}strcat(msg->buf, "\n");}break;}else{strcpy(msg->buf, "该历史记录不存在");break;}}}send(msg->acceptfd, msg->buf, strlen(msg->buf) - 1, 0);
}

3.用户端

#include "head.h"int flag = 0;
fd_set readfds, tempfds;
sqlite3 *db;
MSG msg;void denglujiemian();    // 登录界面
void yuncidianjiemian(); // 云词典界面
void zhuce(MSG *msg);    // 注册
void denglu(MSG *msg);   // 登录
void chaxun(MSG *msg);   // 查询
void lishi(MSG *msg);    // 历史int main(int argc, char *argv[])
{if (argc != 2){printf("用法：<port>\n");return -1;}int sockfd = socket(AF_INET, SOCK_STREAM, 0);if (sockfd < 0){perror("socket err");return -1;}struct sockaddr_in saddr;saddr.sin_family = AF_INET;saddr.sin_port = htons(atoi(argv[1]));saddr.sin_addr.s_addr = inet_addr("192.168.50.214");socklen_t addrlen = sizeof(saddr);if (connect(sockfd, (struct sockaddr *)&saddr, addrlen) < 0){perror("connect err");return -1;}printf("connect 成功\n");while (1){memset(msg.buf, 0, sizeof(msg.buf));msg.acceptfd = sockfd;if (flag == 0){denglujiemian(); // 登录界面}if (flag == 1){yuncidianjiemian(); // 云词典界面}printf("请输入选项: ");scanf(" %c", &msg.type);printf("msg.type:%c\n", msg.type);switch (msg.type){case 'R':zhuce(&msg); // 注册break;case 'L':denglu(&msg); // 登录break;case 'Q':chaxun(&msg); // 查询break;case 'H':lishi(&msg); // 历史break;case 'D':flag = 0; // 返回登录菜单break;default:break;}}// 6.关闭close(sockfd);return 0;
}void denglujiemian() // 登录界面
{printf("************************************\n");printf("* R: register   L: login   D: quit *\n");printf("************************************\n");
}
void yuncidianjiemian() // 云词典界面
{printf("***********************************************\n");printf("* Q: query_word   H: history_record   D: quit *\n");printf("***********************************************\n");
}void zhuce(MSG *msg) // 注册
{memset(msg->name, 0, sizeof(msg->name));memset(msg->password, 0, sizeof(msg->password));printf("请输入用户名:");scanf("%s", msg->name);getchar();printf("请输入用户密码:");scanf("%s", msg->password);getchar();send(msg->acceptfd, msg, sizeof(*msg), 0);recv(msg->acceptfd, msg->buf, sizeof(msg->buf), 0);printf("%s\n", msg->buf);
}
void denglu(MSG *msg) // 登录
{while (1){memset(msg->name, 0, sizeof(msg->name));memset(msg->password, 0, sizeof(msg->password));printf("请输入用户名:");scanf("%s", msg->name);getchar();printf("请输入用户密码:");scanf("%s", msg->password);getchar();send(msg->acceptfd, msg, sizeof(*msg), 0);recv(msg->acceptfd, msg->buf, sizeof(msg->buf), 0);printf("%s\n", msg->buf);if (strcmp(msg->buf, "登录成功") == 0){flag = 1;break;}if (strcmp(msg->buf, "登录失败") == 0){continue;}}
}
void chaxun(MSG *msg) // 查询
{while (1){memset(msg->buf, 0, sizeof(msg->buf));memset(msg->msgg.word, 0, sizeof(msg->msgg.word));printf("请输入要查询的单词(输入＃退出查询)：");scanf("%s", msg->msgg.word);getchar();if (strcmp(msg->msgg.word, "#") == 0){break;}else{send(msg->acceptfd, msg, sizeof(*msg), 0);recv(msg->acceptfd, msg->buf, sizeof(msg->buf), 0);printf("%s\n", msg->buf);continue;}}
}
void lishi(MSG *msg) // 历史
{send(msg->acceptfd, msg, sizeof(*msg), 0);recv(msg->acceptfd, msg->buf, sizeof(msg->buf), 0);printf("%s\n", msg->buf);
}