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基于MySQL的BBS设计(2)_MySQL

May 27, 2016 pm 02:29 PM
private interface database username

基于MySQL的BBS设计(2)_MySQL

 4。用户模块设计
对于底层数据库,调用mysql的C API函数来进行数据库的修改,内部保存一定的状态变量(例如用户名,还是留给上一层完成?),对上一层,则提供用户管理的接口。

Class UserManage {
private:
char myuserid[20]; // 用户的id,未登陆前为空
time logintime; // 用户登陆时间,并用于计算停留时间
char loginhost[20]; //上站地点。
public:
int NewUser( char *userid, char *passwd );
新建一个用户,判断是否已经有,其他资料暂时为空,
firstlogintime,权限等设缺省值。
int UserLogin( char *userid, char *passwd );
用户登陆,验证密码,
int ChangePasswd( char *oldpasswd, char *newpasswd );
修改密码,要求原密码一致。
int ChangePriData( char *newname, char *newemail,
char *newaddr );
改变基本数据,泥称,email,住址。。。。
int ModifyNumData( int addlogin, int addpost );
修改文章数,上站次数,等数据。。。。注意调用对象。
int UserLogout();
用户退出,修改lastlogin,staytime,loginhost等
// 普通查询命令
int QueryCommonData( const char * userid, int& loginnum,
char * username, int& postnum,
time& lastlogin, char *lasthost );
查询网友基本信息。
// 特权指令,函数在完成功能前,先判断权限。
int QueryPriData( const char * userid, char *email,
char *addr );
查询基本信息,普通人只能查自己,有特权才能查其他人。
int ModifyUserLevel( BOOL isAdd, unsigned long level );
修改用户的权限,
int ModifyUserId( char *oldid, char *newid );
char *newemail, char *newaddr );
修改用户的基本数据。
int ModifyUserNumdata( char *userid, int addlogin, int addpost );
修改用户的文章数等数据。
int ModifyUserPasswd( char *userid, char *newpasswd );
修改用户的密码。
}
Copy after login

以上各个函数难度不大,都是执行相应的sql语句,访问mysql数据库,是否将一般指令归到特权指令中去呢?权限的检查,是放在这一层还是上一层?
这更多的是看考虑的着重点,是看程序的清晰性还是代码的简练,可能还是看代码吧,毕竟要考虑访问量,另外,上层服务层是否也应该考虑权限检查问题呢?
5。版面模块设计
所谓分类,更多的是为telnet服务端考虑的,在cq66模式下,用户可以按照自己的意愿进行分类,反正最后都是直接以版为基本单位访问的。
对于版面文章的访问,存放的时候以整篇文章为参数,文章的分块由本层完成,如果上层以块为单位传送,则在上层全部传完,组合后,再传参到本层分解;在读取 的时候,本层则以块为单位访问,如果上层要以全文为单位访问,则在上层做合并 工作,本层不管。
至于要不要独立出索引,不影响上层的操作,主要和下层的数据库构造有关,主要考虑可行性,效率需求等。
权限的检查放在哪里进行呢?还是放在上层吧,其实就telnet服务器端,和cq66 的客户端,根本不会给一般用户显示特殊指令的菜单,当然,用户可以直接发送cq66 的指令,服务器方还是要检查的。但应该不用在它下面的功能模块层再检查一次吧 。

Class BoardManage {
private:
public:
// 有关分类的操作
int GetClassNameInfo( int maxclass, char **classid,
char ** classname );
返回分类的信息,中英文名。
int GetBoardName( int maxboards, char *classid,
char **boardname );
返回某分类中的版面信息,一般分类,直接select ..
from sboard
where boardclass == .... 特殊分类则查相应的表。。。。
// 修改需要版面管理员以上的特权
int NewClass( char * newclassname, int type );
新建分类,普通分类还是特殊分类,
int DeleteClass( char *newclassname );
删除分类,但不cascade,即本层不负责一致性,由上层负责将
相应的版面的分类信息改为别的。分类改名也是先删再建,
int AddClassBoard( const char *classname, char *newboardname );
将已建好的版加入某分类中,专门针对特殊分类,对一般分类,其
效果和modifyboardinfo一样,
int DeleteClassBoard( const char *classname, char *boardname );
从分类中删除某个版,也是针对特殊分类,对一般分类,效果也
是和modifyboardinfo一样,一个版的分类属性可以为空,即不属
于任何分类。
// 有关版的信息的操作。
int NewBoard( const char *boardid,char *boardname);
新建一个版,建立对应的表。其他参数取默认值。
int DeleteBoard( const char *boardid );
删除一个版,删除对应的表。
int GetBoardInfo( const char *boardid, char *boardname,
int& numposts, char *masters, char *class,
long &level );
取的版面的信息。
int ModifyBoardId( const char *oldid, char *newid );
改变版的英文id,对应table的名称也要改变,
int ModifyBoardInfo( const char *boardid, char *boardname,
int numposts, char *masters, char *class,
long level );
修改版面信息,需要特权。
// 有关版面文章的操作。
int AddText( char *boardid, char *title, char *writer,
char *text );
往版面中增加文章,内部将长文章分割成2k的块。
int DeleteText( char *boardid, int num );
删除文章,只是做一个标记,并不立刻修改对应的table。
int FlushTable( char *boardid );
刷新版面,删除被删文章的对应的记录。
int MarkText( char *boardid, int num, char mark );
给文章做标记。
int ModifyTitle( char *boardid, int num, char *newtitle );
修改文章的标题。
int ModifyText( char *boardid, int num, char *newtext );
修改文章内容,不是自己的文章需要特权。
int GetTextInfo( const char *boardid, int num, char *title,
char *writer, char& mark );
取得文章的标题信息。
int GetText( const char *boardid, int num, int block,
char *text );
读取文章的内容,以块为单位。
// 文章和作者的查询
// 一次将查询的结果全部返回?
int QueryWriter( const char *boardid, char *writer,
char **result );
查询版面上,某作者的文章。
int QueryTitle( const char *boardid, char *title,
char **result );
查询版面上,标题中包含指定内容的文章。
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