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< h1 id = "基于python语言的BIBA模型图形界面实现" > < a href = "#基于python语言的BIBA模型图形界面实现" class = "headerlink" title = "基于python语言的BIBA模型图形界面实现" > < / a > 基于python语言的BIBA模型图形界面实现< / h1 > < h2 id = "实验目的：" > < a href = "#实验目的：" class = "headerlink" title = "实验目的：" > < / a > 实验目的：< / h2 > < ol >
< li > < strong > 查阅资料， < / strong > < / li >
< li > < strong > 通过编程实现基于biba模型的完整性访问控制， < / strong > < / li >
< li > < strong > 使用python语言实现， < / strong > < / li >
< / ol >
< hr >
< h2 id = "实验环境：" > < a href = "#实验环境：" class = "headerlink" title = "实验环境：" > < / a > 实验环境：< / h2 > < ul >
< li > 操作系统： < / li >
< li > 工具版本： ， < / li >
< / ul >
< hr >
< h2 id = "实验原理：" > < a href = "#实验原理：" class = "headerlink" title = "实验原理：" > < / a > 实验原理：< / h2 > < h4 id = "什么是安全模型" > < a href = "#什么是安全模型" class = "headerlink" title = "什么是安全模型" > < / a > 什么是安全模型< / h4 > < ul >
< li > 系统的元素 < blockquote >
< p > 具有行为能力的主体< br > 不具有行为能力的客体< / p >
< / blockquote >
< / li >
< li > 系统的操作行为< blockquote >
< p > 可以执行的命令：读、写、执行< / p >
< / blockquote >
< / li >
< li > 对系统行为的约束方式< blockquote >
< p > 对行为的控制策略< / p >
< / blockquote >
< / li >
< li > 模型从抽象层次规定了系统行为和约束行为的方式< / li >
< li > 模型往往用状态来表示< blockquote >
< p > 系统行为所依赖的环境< br > 行为对系统产生的效果< / p >
< / blockquote >
< h4 id = "biba完整性模型： > < a href = "#biba完整性模型： class = "headerlink" title = "biba完整性模型： > < / a > biba完整性模型： < / h4 > < ul >
< li > 完整性威胁问题< blockquote >
< p > 完整性的威胁就是一个子系统在初始时刻认为不正常的修改行为；< br > 来源：内部& 外部；< br > 类型：直接& 间接< / p >
< / blockquote >
< / li >
< / ul >
< / li >
< / ul >
< table >
< thead >
< tr >
< th > 外部的直接< / th >
< th > 外部的间接< / th >
< th > 内部的直接< / th >
< th > 内部的间接< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td > 外部系统恶意地篡改另一个系统的数据或程序< / td >
< td > 一个外部系统插入恶意的子程序< / td >
< td > 修改自己的代码< / td >
< td > 修改自己的指针< / td >
< / tr >
< / tbody >
< / table >
< ul >
< li > biba模型的完整性定义< blockquote >
< p > 完整性级别高的实体对完整性低的实体具有完全的支配性，反之如果一个实体对另一个实体具有完全的控制权，说明前者完整性级别更高，这里的实体既可以是主体也可以是客体。< br > 完整性级别和可信度有密切的关系，完整级别越高，意味着可信度越高。< / p >
< / blockquote >
< / li >
< li > biba模型的规则 < / li >
< / ul >
< ul >
< li style = "list-style: none" > < input type = "checkbox" > 对于写和执行操作，有如下规则：< blockquote >
< p > < strong > 写规则控制< / strong > < br > 当且仅当主体S的完整性级别大于或等于客体O的完整性级别时， < strong > 上写< / strong > 。< br > < strong > 执行操作控制< / strong > < br > 当且仅当主体S2的完整性级别高于或等于S1,主体S1可以执行主体S2。 < / p >
< / blockquote >
< / li >
< li style = "list-style: none" > < input type = "checkbox" > 关于读操作，有不同的控制策略：< blockquote >
< p > < strong > 低水标模型< / strong > < br > 任意主体可以读任意完整性级别的客体，但是如果主体读完整性级别比自己低的客体时，主体的完整性级别将为客体完整性级别，否则，主体的完整性级别保持不变。< br > < strong > 环模型< / strong > < br > 不管完整性级别如何，任何主体都可以读任何客体< br > < strong > 严格完整性模型< / strong > < br > 这个模型对读操作是根据主客体的完整性级别严格控制的，即只有完整性级别低或相等的主体才可以读完整性级别高的客体，称为< strong > 下读< / strong > < / p >
< / blockquote >
< / li >
< / ul >
< p > < strong > 一般都是指毕巴严格完整性模型，总结来说是上写、下读< / strong > < / p >
< hr >
< h2 id = "实验内容：" > < a href = "#实验内容：" class = "headerlink" title = "实验内容：" > < / a > 实验内容：< / h2 > < h3 id = "用户登录实现" > < a href = "#用户登录实现" class = "headerlink" title = "用户登录实现" > < / a > 用户登录实现< / h3 > < p > < strong > 核对用户输入的账户密码与存储的是否匹配< / strong > < / p >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/login.PNG" alt = "login" > < / p >
< ul >
< li > 从用户输入框获取账户和密码< / li >
< li > 检查输入信息是否合法（为空）< / li >
< li > 从password.txt中获取， < / li >
< li > 检查输入的账户是否存在< / li >
< li > 若存在，检查对应的密码是否正确< / li >
< li > < p > 若正确，判断是管理员还是普通用户，并跳转相应的界面< / p >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < span class = "line" > 25< / span > < br > < span class = "line" > 26< / span > < br > < span class = "line" > 27< / span > < br > < span class = "line" > 28< / span > < br > < span class = "line" > 29< / span > < br > < span class = "line" > 30< / span > < br > < span class = "line" > 31< / span > < br > < span class = "line" > 32< / span > < br > < span class = "line" > 33< / span > < br > < span class = "line" > 34< / span > < br > < span class = "line" > 35< / span > < br > < span class = "line" > 36< / span > < br > < span class = "line" > 37< / span > < br > < span class = "line" > 38< / span > < br > < span class = "line" > 39< / span > < br > < span class = "line" > 40< / span > < br > < span class = "line" > 41< / span > < br > < span class = "line" > 42< / span > < br > < span class = "line" > 43< / span > < br > < span class = "line" > 44< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > checkPass< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > nameIn = self.lineEdit.text()< / span > < br > < span class = "line" > passwdIn = self.lineEdit_2.text()< / span > < br > < span class = "line" > md5 = hashlib.md5()< / span > < br > < span class = "line" > md5.update(passwdIn.encode(< span class = "string" > "utf-8"< / span > ))< / span > < br > < span class = "line" > passwdIn = md5.hexdigest()< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > (nameIn == < span class = "string" > ''< / span > ) < span class = "keyword" > or< / span > (passwdIn == < span class = "string" > ''< / span > ):< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "账号和密码不能为空"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < span class = "line" > print(nameIn, passwdIn)< / span > < br > < span class = "line" > fr = open(< span class = "string" > './etc/passwd.txt'< / span > )< / span > < br > < span class = "line" > arrayofLines = fr.readlines()< / span > < br > < span class = "line" > numberofLines = len(arrayofLines)< / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > arrayofLines:< / span > < br > < span class = "line" > line = line.strip()< / span > < br > < span class = "line" > listFromLine = line.split(< span class = "string" > ':'< / span > )< / span > < br > < span class = "line" > name = listFromLine[< span class = "number" > 0< / span > ]< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > name == nameIn:< / span > < br > < span class = "line" > numberofLines = < span class = "number" > -1< / span > < / span > < br > < span class = "line" > passwd = listFromLine[< span class = "number" > 1< / span > ]< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > passwd == passwdIn:< / span > < br > < span class = "line" > group = listFromLine[< span class = "number" > 2< / span > ]< / span > < br > < span class = "line" > print(< span class = "string" > "\n登录成功!\n"< / span > )< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > name == < span class = "string" > 'root'< / span > :< / span > < br > < span class = "line" > print(< span class = "string" > 'root登录'< / span > )< / span > < br > < span class = "line" > rootUI.show()< / span > < br > < span class = "line" >
< / li >
< / ul >
< hr >
< h3 id = "管理员功能实现" > < a href = "#管理员功能实现" class = "headerlink" title = "管理员功能实现" > < / a > 管理员功能实现< / h3 > < p > < strong > 管理员可以对用户进行增、删、查的操作< / strong > < / p >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/rootUI.PNG" alt = "login" > < / p >
< h4 id = "增加用户的实现" > < a href = "#增加用户的实现" class = "headerlink" title = "增加用户的实现" > < / a > 增加用户的实现< / h4 > < blockquote >
< ul >
< li > 获取管理员输入的用户名、密码和用户等级< / li >
< li > 将明文密码转换为md5值< / li >
< li > 判断输入的账户是否已经存在以及是否为空< / li >
< li > 如果没有问题， < / li >
< / ul >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < span class = "line" > 25< / span > < br > < span class = "line" > 26< / span > < br > < span class = "line" > 27< / span > < br > < span class = "line" > 28< / span > < br > < span class = "line" > 29< / span > < br > < span class = "line" > 30< / span > < br > < span class = "line" > 31< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > adduser< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > print(< span class = "string" > '开始添加'< / span > )< / span > < br > < span class = "line" > name = self.lineEdit_4.text()< / span > < br > < span class = "line" > passwd = self.lineEdit_6.text()< / span > < br > < span class = "line" > md5 = hashlib.md5()< / span > < br > < span class = "line" > md5.update(passwd.encode(< span class = "string" > "utf-8"< / span > ))< / span > < br > < span class = "line" > passwd = md5.hexdigest()< / span > < br > < span class = "line" > group = self.comboBox.currentText()< / span > < br > < span class = "line" > self.name = name< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > self.euxit():< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > name == < span class = "string" > ''< / span > < span class = "keyword" > or< / span > passwd == < span class = "string" > ''< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "账号和密码不能为空"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > filename = cur_path + < span class = "string" > '/etc/passwd.txt'< / span > < / span > < br > < span class = "line" > fi = open(filename, < span class = "string" > 'r+'< / span > )< / span > < br > < span class = "line" > str = name + < span class = "string" > ':'< / span > + passwd + < span class = "string" > ':'< / span > + group + < span class = "string" > '\n'< / span > < / span > < br > < span class = "line" > print(< span class = "string" > '成功增加用户'< / span > + str + < span class = "string" > '\n'< / span > )< / span > < br > < span class = "line" > fi.seek(< span class = "number" > 0< / span > , < span class = "number" > 2< / span > )< / span > < br > < span class = "line" > fi.write(str)< / span > < br > < span class = "line" > fi.close()< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "用户已存在"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "查询已有用户的实现" > < a href = "#查询已有用户的实现" class = "headerlink" title = "查询已有用户的实现" > < / a > 查询已有用户的实现< / h4 > < blockquote >
< p > 从passwd.txt中逐行读出< / p >
< / blockquote >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/existUser.PNG" alt = "login" > < / p >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > readuser< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > print(< span class = "string" > 'readuser'< / span > )< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > filename = cur_path + < span class = "string" > '/etc/passwd.txt'< / span > < / span > < br > < span class = "line" > fo = open(filename)< / span > < br > < span class = "line" > arrayofLines = fo.readlines()< / span > < br > < span class = "line" > names = < span class = "string" > ''< / span > < / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > arrayofLines:< / span > < br > < span class = "line" > line = line.strip()< / span > < br > < span class = "line" > listFromLine = line.split(< span class = "string" > ':'< / span > )< / span > < br > < span class = "line" > names = names + listFromLine[< span class = "number" > 0< / span > ] + < span class = "string" > '\n'< / span > < / span > < br > < span class = "line" > self.textEdit.setPlaceholderText(names)< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "删除用户的实现" > < a href = "#删除用户的实现" class = "headerlink" title = "删除用户的实现" > < / a > 删除用户的实现< / h4 > < blockquote >
< p > 从passwd.txt中逐行读出用户名， ， ， < / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > rmuser< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > print(< span class = "number" > 1< / span > )< / span > < br > < span class = "line" > cur_path = os.getcwd()< / span > < br > < span class = "line" > filename = cur_path + < span class = "string" > '/etc/passwd.txt'< / span > < / span > < br > < span class = "line" > rmName = self.lineEdit.text()< / span > < br > < span class = "line" > < span class = "keyword" > with< / span > open(filename, < span class = "string" > 'r'< / span > ,encoding=< span class = "string" > "utf-8"< / span > ) < span class = "keyword" > as< / span > r:< / span > < br > < span class = "line" > lines = r.readlines()< / span > < br > < span class = "line" > lenl = len(lines)< / span > < br > < span class = "line" > < span class = "keyword" > with< / span > open(filename, < span class = "string" > 'w'< / span > ,encoding=< span class = "string" > "utf-8"< / span > ) < span class = "keyword" > as< / span > w:< / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > lines:< / span > < br > < span class = "line" > l = line.strip()< / span > < br > < span class = "line" > listFromLine = l.split(< span class = "string" > ':'< / span > )< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > rmName == listFromLine[< span class = "number" > 0< / span > ]:< / span > < br > < span class = "line" > print(< span class = "string" > '删除用户'< / span > + rmName)< / span > < br > < span class = "line" > < span class = "keyword" > continue< / span > < / span > < br > < span class = "line" > < span class = "keyword" > if< / span > line == < span class = "string" > '\n'< / span > :< / span > < br > < span class = "line" > print(< span class = "string" > 'find换行'< / span > )< / span > < br > < span class = "line" > line = < span class = "string" > ''< / span > < / span > < br > < span class = "line" > w.write(line)< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< hr >
< h3 id = "普通用户功能实现" > < a href = "#普通用户功能实现" class = "headerlink" title = "普通用户功能实现" > < / a > 普通用户功能实现< / h3 > < p > < strong > 普通用户可以完成对合法权限文件的读取、增加内容（上写下读）以及创建文件的操作< / strong > < / p >
< p > < img src = "https://github.com/Cool-Y/BIBA-model/blob/master/img/normal.PNG" alt = "login" > < / p >
< h4 id = "读取文件内容" > < a href = "#读取文件内容" class = "headerlink" title = "读取文件内容" > < / a > 读取文件内容< / h4 > < blockquote >
< p > 双击文件名< br > 获取选中文件和当前用户的完整性级别< br > 如果用户的级别低于文件，则读取文件内容< / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > readfile< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > dict = self.getGrade()< / span > < br > < span class = "line" > fgrade = str(dict[self.file_path])< / span > < br > < span class = "line" > ugrade = self.lineEdit_2.text()< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > ugrade > = fgrade:< / span > < br > < span class = "line" > print(ugrade+ < span class = "string" > ' 正在读取 '< / span > +fgrade)< / span > < br > < span class = "line" > filename = self.file_path< / span > < br > < span class = "line" > print(filename)< / span > < br > < span class = "line" > fr = open(filename)< / span > < br > < span class = "line" > lines = < span class = "string" > ''< / span > < / span > < br > < span class = "line" > arrayofLines = fr.readlines()< / span > < br > < span class = "line" > < span class = "keyword" > for< / span > line < span class = "keyword" > in< / span > arrayofLines:< / span > < br > < span class = "line" > lines += line< / span > < br > < span class = "line" > self.textEdit.setText(lines)< / span > < br > < span class = "line" > print(< span class = "string" > '读取成功\n'< / span > )< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "您的用户等级太高"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "增加文件内容" > < a href = "#增加文件内容" class = "headerlink" title = "增加文件内容" > < / a > 增加文件内容< / h4 > < blockquote >
< p > 双击文件名< br > 获取选中文件和当前用户的完整性级别< br > 如果用户的级别高于文件，则写入文件内容< / p >
< / blockquote >
< figure class = "highlight python" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "function" > < span class = "keyword" > def< / span > < span class = "title" > writefile< / span > < span class = "params" > (self)< / span > :< / span > < / span > < br > < span class = "line" > dict = self.getGrade()< / span > < br > < span class = "line" > fgrade = dict[self.file_path]< / span > < br > < span class = "line" > ugrade = self.lineEdit_2.text()< / span > < br > < span class = "line" > print(ugrade + < span class = "string" > ' 正在写入 '< / span > + fgrade)< / span > < br > < span class = "line" > < span class = "keyword" > if< / span > ugrade < = fgrade:< / span > < br > < span class = "line" > filename = self.file_path< / span > < br > < span class = "line" > str = self.textEdit.toPlainText()< / span > < br > < span class = "line" > print(str)< / span > < br > < span class = "line" > fo = open(filename, < span class = "string" > 'r+'< / span > )< / span > < br > < span class = "line" > fo.seek(< span class = "number" > 0< / span > , < span class = "number" > 2< / span > )< / span > < br > < span class = "line" > fo.write(str)< / span > < br > < span class = "line" > < span class = "keyword" > else< / span > :< / span > < br > < span class = "line" > QMessageBox.warning(self,< / span > < br > < span class = "line" > < span class = "string" > "警告"< / span > ,< / span > < br > < span class = "line" > < span class = "string" > "您的用户等级太低"< / span > ,< / span > < br > < span class = "line" > QMessageBox.Yes)< / span > < br > < span class = "line" > self.lineEdit.setFocus()< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h4 id = "创建文件" > < a href = "#创建文件" class = "headerlink" title = "创建文件" > < / a > 创建文件< / h4 > < blockquote >
< p > 获取当前用户名和输入的文件名< br > 在当前路径下创建名为用户名的文件< br > 并对新创建的文件与用户等级建立字典， ， < br > 这个字典方便读写时判断等级高低< / p >
< / blockquote >
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var wordLen = word.length;
if (wordLen === 0) {
return [];
}
var startPosition = 0, position = [], index = [];
if (!caseSensitive) {
text = text.toLowerCase();
word = word.toLowerCase();
}
while ((position = text.indexOf(word, startPosition)) > -1) {
index.push({position: position, word: word});
startPosition = position + wordLen;
}
return index;
}
indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
});
if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
isMatch = true;
hitCount = indexOfTitle.length + indexOfContent.length;
}
}
// show search results
if (isMatch) {
// sort index by position of keyword
[indexOfTitle, indexOfContent].forEach(function (index) {
index.sort(function (itemLeft, itemRight) {
if (itemRight.position !== itemLeft.position) {
return itemRight.position - itemLeft.position;
} else {
return itemLeft.word.length - itemRight.word.length;
}
});
});
// merge hits into slices
function mergeIntoSlice(text, start, end, index) {
var item = index[index.length - 1];
var position = item.position;
var word = item.word;
var hits = [];
var searchTextCountInSlice = 0;
while (position + word.length < = end & & index.length != 0) {
if (word === searchText) {
searchTextCountInSlice++;
}
hits.push({position: position, length: word.length});
var wordEnd = position + word.length;
// move to next position of hit
index.pop();
while (index.length != 0) {
item = index[index.length - 1];
position = item.position;
word = item.word;
if (wordEnd > position) {
index.pop();
} else {
break;
}
}
}
searchTextCount += searchTextCountInSlice;
return {
hits: hits,
start: start,
end: end,
searchTextCount: searchTextCountInSlice
};
}
var slicesOfTitle = [];
if (indexOfTitle.length != 0) {
slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
}
var slicesOfContent = [];
while (indexOfContent.length != 0) {
var item = indexOfContent[indexOfContent.length - 1];
var position = item.position;
var word = item.word;
// cut out 100 characters
var start = position - 20;
var end = position + 80;
if(start < 0 ) {
start = 0;
}
if (end < position + word . length ) {
end = position + word.length;
}
if(end > content.length){
end = content.length;
}
slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
}
// sort slices in content by search text's count and hits' count
slicesOfContent.sort(function (sliceLeft, sliceRight) {
if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
return sliceRight.searchTextCount - sliceLeft.searchTextCount;
} else if (sliceLeft.hits.length !== sliceRight.hits.length) {
return sliceRight.hits.length - sliceLeft.hits.length;
} else {
return sliceLeft.start - sliceRight.start;
}
});
// select top N slices in content
var upperBound = parseInt('1');
if (upperBound >= 0) {
slicesOfContent = slicesOfContent.slice(0, upperBound);
}
// highlight title and content
function highlightKeyword(text, slice) {
var result = '';
var prevEnd = slice.start;
slice.hits.forEach(function (hit) {
result += text.substring(prevEnd, hit.position);
var end = hit.position + hit.length;
result += '< b class = "search-keyword" > ' + text.substring(hit.position, end) + '< / b > ';
prevEnd = end;
});
result += text.substring(prevEnd, slice.end);
return result;
}
var resultItem = '';
if (slicesOfTitle.length != 0) {
resultItem += "< li > < a href = '" + articleUrl + "' class = 'search-result-title' > " + highlightKeyword(title, slicesOfTitle[0]) + "< / a > ";
} else {
resultItem += "< li > < a href = '" + articleUrl + "' class = 'search-result-title' > " + title + "< / a > ";
}
slicesOfContent.forEach(function (slice) {
resultItem += "< a href = '" + articleUrl + "' > " +
"< p class = \"search-result\" > " + highlightKeyword(content, slice) +
"...< / p > " + "< / a > ";
});
resultItem += "< / li > ";
resultItems.push({
item: resultItem,
searchTextCount: searchTextCount,
hitCount: hitCount,
id: resultItems.length
});
}
})
};
if (keywords.length === 1 & & keywords[0] === "") {
resultContent.innerHTML = '< div id = "no-result" > < i class = "fa fa-search fa-5x" / > < / div > '
} else if (resultItems.length === 0) {
resultContent.innerHTML = '< div id = "no-result" > < i class = "fa fa-frown-o fa-5x" / > < / div > '
} else {
resultItems.sort(function (resultLeft, resultRight) {
if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
return resultRight.searchTextCount - resultLeft.searchTextCount;
} else if (resultLeft.hitCount !== resultRight.hitCount) {
return resultRight.hitCount - resultLeft.hitCount;
} else {
return resultRight.id - resultLeft.id;
}
});
var searchResultList = '< ul class = \"search-result-list\" > ';
resultItems.forEach(function (result) {
searchResultList += result.item;
})
searchResultList += "< / ul > ";
resultContent.innerHTML = searchResultList;
}
}
if ('auto' === 'auto') {
input.addEventListener('input', inputEventFunction);
} else {
$('.search-icon').click(inputEventFunction);
input.addEventListener('keypress', function (event) {
if (event.keyCode === 13) {
inputEventFunction();
}
});
}
// remove loading animation
$(".local-search-pop-overlay").remove();
$('body').css('overflow', '');
proceedsearch();
}
});
}
// handle and trigger popup window;
$('.popup-trigger').click(function(e) {
e.stopPropagation();
if (isfetched === false) {
searchFunc(path, 'local-search-input', 'local-search-result');
} else {
proceedsearch();
};
});
$('.popup-btn-close').click(onPopupClose);
$('.popup').click(function(e){
e.stopPropagation();
});
$(document).on('keyup', function (event) {
var shouldDismissSearchPopup = event.which === 27 & &
$('.search-popup').is(':visible');
if (shouldDismissSearchPopup) {
onPopupClose();
}
});
< / script >
< script src = "https://cdn1.lncld.net/static/js/av-core-mini-0.6.4.js" > < / script >
< script > AV . initialize ( "EWwoJgHNdlj6iBjiFlMcabUO-gzGzoHsz" , "x8FxDrYG79C8YFrTww9ljo8K" ) ; < / script >
< script >
function showTime(Counter) {
var query = new AV.Query(Counter);
var entries = [];
var $visitors = $(".leancloud_visitors");
$visitors.each(function () {
entries.push( $(this).attr("id").trim() );
});
query.containedIn('url', entries);
query.find()
.done(function (results) {
var COUNT_CONTAINER_REF = '.leancloud-visitors-count';
if (results.length === 0) {
$visitors.find(COUNT_CONTAINER_REF).text(0);
return;
}
for (var i = 0; i < results.length ; i + + ) {
var item = results[i];
var url = item.get('url');
var time = item.get('time');
var element = document.getElementById(url);
$(element).find(COUNT_CONTAINER_REF).text(time);
}
for(var i = 0; i < entries.length ; i + + ) {
var url = entries[i];
var element = document.getElementById(url);
var countSpan = $(element).find(COUNT_CONTAINER_REF);
if( countSpan.text() == '') {
countSpan.text(0);
}
}
})
.fail(function (object, error) {
console.log("Error: " + error.code + " " + error.message);
});
}
function addCount(Counter) {
var $visitors = $(".leancloud_visitors");
var url = $visitors.attr('id').trim();
var title = $visitors.attr('data-flag-title').trim();
var query = new AV.Query(Counter);
query.equalTo("url", url);
query.find({
success: function(results) {
if (results.length > 0) {
var counter = results[0];
counter.fetchWhenSave(true);
counter.increment("time");
counter.save(null, {
success: function(counter) {
var $element = $(document.getElementById(url));
$element.find('.leancloud-visitors-count').text(counter.get('time'));
},
error: function(counter, error) {
console.log('Failed to save Visitor num, with error message: ' + error.message);
}
});
} else {
var newcounter = new Counter();
/* Set ACL */
var acl = new AV.ACL();
acl.setPublicReadAccess(true);
acl.setPublicWriteAccess(true);
newcounter.setACL(acl);
/* End Set ACL */
newcounter.set("title", title);
newcounter.set("url", url);
newcounter.set("time", 1);
newcounter.save(null, {
success: function(newcounter) {
var $element = $(document.getElementById(url));
$element.find('.leancloud-visitors-count').text(newcounter.get('time'));
},
error: function(newcounter, error) {
console.log('Failed to create');
}
});
}
},
error: function(error) {
console.log('Error:' + error.code + " " + error.message);
}
});
}
$(function() {
var Counter = AV.Object.extend("Counter");
if ($('.leancloud_visitors').length == 1) {
addCount(Counter);
} else if ($('.post-title-link').length > 1) {
showTime(Counter);
}
});
< / script >
< script >
(function(){
var bp = document.createElement('script');
var curProtocol = window.location.protocol.split(':')[0];
if (curProtocol === 'https') {
bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
}
else {
bp.src = 'http://push.zhanzhang.baidu.com/push.js';
}
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(bp, s);
})();
< / script >
< / body >
< / html >
