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question:Мне нужно чтобы после того как введем часы каретка в строке ввода переместилась в самый угол using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; using TMPro; using System.Text.RegularExpressions; public class TimeInputField : MonoBehaviour { [SerializeField] private TMP_InputField inputField; private int hours; private int minutes; private string newValue; private void Start() { inputField.onValueChanged.AddListener(OnValueChanged); } private void OnValueChanged(string value) { // Check if the input contains only digits if (!Regex.IsMatch(value, @"^d *")) { // Remove any non-digit characters from the input value = Regex.Replace(value, @"D", ""); newValue = value; //return; } else { newValue = value; } // Check the input length for the first two characters if (newValue.Length == 2) { // Try parsing the hours if (int.TryParse(newValue, out hours)) { // Check if hours is not greater than 24 if (hours > 24) { hours = 24; } // Update the input field with the formatted hours inputField.text = string.Format("{0:D2} (ч) :", hours); return; } } // Check the input length for the next two characters if (newValue.Length == 4) { // Extract minutes string minutesStr = newValue.Substring(2, 2); // Try parsing the minutes if (int.TryParse(minutesStr, out minutes)) { // Check if minutes is greater than 60 if (minutes > 60) { // Calculate the exceeding minutes and add them to hours int exceedingMinutes = minutes - 60; int existingHours = 0; // Extract existing hours from the input field if (inputField.text.Length >= 9) { string existingHoursStr = inputField.text.Substring(0, 2); int.TryParse(existingHoursStr, out existingHours); } // Add the exceeding minutes to the existing hours int newHours = existingHours + 1; int newMinutes = exceedingMinutes; // Check if new hours is not greater than 24 if (newHours > 24) { newHours = 24; } // Apply the desired format string formattedValue = string.Format("{0:D2} (ч) : {1:D2} (мин)", newHours, newMinutes); inputField.text = formattedValue; return; } else { // Apply the desired format string formattedValue = string.Format("{0:D2} (ч) : {1:D2} (мин)", hours, minutes); inputField.text = formattedValue; return; } } } } }
answer:Для перемещения каретки в самый угол после ввода часов в строке ввода, вы можете добавить следующий код в метод OnValueChanged: ```csharp // Move caret to the end of the input field inputField.caretPosition = inputField.text.Length; ``` Полный код класса TimeInputField после добавления этого кода будет выглядеть так: ```csharp using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; using TMPro; using System.Text.RegularExpressions; public class TimeInputField : MonoBehaviour { [SerializeField] private TMP_InputField inputField; private int hours; private int minutes; private string newValue; private void Start() { inputField.onValueChanged.AddListener(OnValueChanged); } private void OnValueChanged(string value) { // Check if the input contains only digits if (!Regex.IsMatch(value, @"^d *")) { // Remove any non-digit characters from the input value = Regex.Replace(value, @"D", ""); newValue = value; //return; } else { newValue = value; } // Check the input length for the first two characters if (newValue.Length == 2) { // Try parsing the hours if (int.TryParse(newValue, out hours)) { // Check if hours is not greater than 24 if (hours > 24) { hours = 24; } // Update the input field with the formatted hours inputField.text = string.Format("{0:D2} (ч) :", hours); // Move caret to the end of the input field inputField.caretPosition = inputField.text.Length; return; } } // Check the input length for the next two characters if (newValue.Length == 4) { // Extract minutes string minutesStr = newValue.Substring(2, 2); // Try parsing the minutes if (int.TryParse(minutesStr, out minutes)) { // Check if minutes is greater than 60 if (minutes > 60) { // Calculate the exceeding minutes and add them to hours int exceedingMinutes = minutes - 60; int existingHours = 0; // Extract existing hours from the input field if (inputField.text.Length >= 9) { string existingHoursStr = inputField.text.Substring(0, 2); int.TryParse(existingHoursStr, out existingHours); } // Add the exceeding minutes to the existing hours int newHours = existingHours + 1; int newMinutes = exceedingMinutes; // Check if new hours is not greater than 24 if (newHours > 24) { newHours = 24; } // Apply the desired format string formattedValue = string.Format("{0:D2} (ч) : {1:D2} (мин)", newHours, newMinutes); inputField.text = formattedValue; // Move caret to the end of the input field inputField.caretPosition = inputField.text.Length; return; } else { // Apply the desired format string formattedValue = string.Format("{0:D2} (ч) : {1:D2} (мин)", hours, minutes); inputField.text = formattedValue; // Move caret to the end of the input field inputField.caretPosition = inputField.text.Length; return; } } } } } ``` Теперь каретка будет перемещаться в самый угол после ввода часов.
question:基于javaweb和Springboot框架的关于XSS攻击防护的示例代码
answer:下面是一个基于JavaWeb和Spring Boot框架的示例代码,用于防护XSS攻击: 1. 在pom.xml文件中添加以下依赖: ```xml <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.owasp.encoder</groupId> <artifactId>encoder</artifactId> <version>1.2.2</version> </dependency> ``` 2. 创建一个控制器类,例如XssProtectionController.java: ```java import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.owasp.encoder.Encode; @RestController @RequestMapping("/xss") public class XssProtectionController { @RequestMapping("/example") public String example(String userInput) { String encodedInput = Encode.forHtml(userInput); return "User input: " + encodedInput; } } ``` 3. 运行Spring Boot应用程序,并发送GET请求到http://localhost:8080/xss/example,例如:http://localhost:8080/xss/example?userInput=<script>alert('XSS攻击')</script>。 4. 应用程序将会返回经过HTML编码处理后的用户输入,例如:User input: <script>alert('XSS攻击')</script>。 通过使用`org.owasp.encoder`提供的`Encode.forHtml()`方法,我们可以将用户输入中可能包含的HTML标签和特殊字符进行编码处理,防止XSS攻击。这样,无论用户输入什么样的恶意代码,都会被转义成普通的文本,不会被浏览器解析执行。
question:代码基于filter
answer:如果你想使用Filter来防护XSS攻击,你可以根据以下步骤进行操作: 1. 创建一个Filter类,例如XssProtectionFilter.java: ```java import javax.servlet.*; import javax.servlet.annotation.WebFilter; import java.io.IOException; @WebFilter(urlPatterns = "/*") public class XssProtectionFilter implements Filter { @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { chain.doFilter(new XSSRequestWrapper((HttpServletRequest) request), response); } // 其他方法如init()和destroy()可以保持为空 } ``` 2. 创建一个包装HttpServletRequest的类,例如XSSRequestWrapper.java: ```java import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; import java.util.Collections; import java.util.Enumeration; import java.util.HashMap; import java.util.Map; public class XSSRequestWrapper extends HttpServletRequestWrapper { public XSSRequestWrapper(HttpServletRequest request) { super(request); } @Override public String[] getParameterValues(String parameter) { String[] rawValues = super.getParameterValues(parameter); if (rawValues == null) { return null; } int count = rawValues.length; String[] encodedValues = new String[count]; for (int i = 0; i < count; i++) { encodedValues[i] = XSSUtil.stripXSS(rawValues[i]); } return encodedValues; } @Override public Map<String, String[]> getParameterMap() { Map<String, String[]> rawMap = super.getParameterMap(); Map<String, String[]> encodedMap = new HashMap<>(); for (String key : rawMap.keySet()) { String[] rawValues = rawMap.get(key); int count = rawValues.length; String[] encodedValues = new String[count]; for (int i = 0; i < count; i++) { encodedValues[i] = XSSUtil.stripXSS(rawValues[i]); } encodedMap.put(key, encodedValues); } return encodedMap; } @Override public Enumeration<String> getParameterNames() { return Collections.enumeration(getParameterMap().keySet()); } @Override public String getParameter(String parameter) { String rawValue = super.getParameter(parameter); if (rawValue == null) { return null; } return XSSUtil.stripXSS(rawValue); } @Override public String getHeader(String name) { String rawValue = super.getHeader(name); if (rawValue == null) { return null; } return XSSUtil.stripXSS(rawValue); } // 其他方法如getRequestURL()和getRequestURI()可以保持不变 } ``` 3. 创建一个辅助类XSSUtil.java,用于编写处理XSS攻击的方法: ```java import org.owasp.encoder.Encode; public class XSSUtil { public static String stripXSS(String value) { if (value != null) { value = Encode.forHtml(value); // 进行HTML编码 value = value.replaceAll("<", "<").replaceAll(">", ">"); // 替换标签尖括号 value = value.replaceAll("(", "(").replaceAll(")", ")"); // 替换圆括号 value = value.replaceAll("'", "'"); // 替换单引号 value = value.replaceAll("eval((.*))", ""); // 删除eval函数 value = value.replaceAll("["'][s]*javascript:(.*)["']", """"); // 删除javascript伪协议 } return value; } } ``` 4. 在Web应用程序的web.xml中添加过滤器配置,例如: ```xml <filter> <filter-name>XssProtectionFilter</filter-name> <filter-class>com.example.filter.XssProtectionFilter</filter-class> </filter> <filter-mapping> <filter-name>XssProtectionFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> ``` 这样,当用户发送请求时,XssProtectionFilter会拦截请求,并使用XSSRequestWrapper包装HttpServletRequest。在XSSRequestWrapper中,通过调用XSSUtil.stripXSS()方法,可以对请求参数和头进行防护,将潜在的恶意代码进行处理。最后,请求将继续传递给下一个过滤器或目标资源。这样做可以保护应用程序免受XSS攻击的威胁。
question:介绍HttpServletRequest、HttpServletResponse类的主要作用、主要方法和示例
answer:HttpServletRequest类是Java Servlet API中的一个接口,它用于封装HTTP请求的信息。它提供了获取请求URL、请求参数、请求头、请求方法等的方法。主要作用是在服务器端获取客户端发送的HTTP请求信息。 HttpServletResponse类也是Java Servlet API中的一个接口,它用于封装HTTP响应的信息。它提供了设置响应状态码、响应头、响应内容等的方法。主要作用是在服务器端向客户端发送HTTP响应。 以下是HttpServletRequest和HttpServletResponse类的一些主要方法: HttpServletRequest类的主要方法: - `getHeader(String name)`:获取指定名称的请求头的值。 - `getParameter(String name)`:获取指定名称的请求参数的值。 - `getMethod()`:获取HTTP请求的方法(GET、POST等)。 - `getRequestURL()`:获取请求的完整URL。 - `getInputStream()`:获取请求的输入流。 HttpServletResponse类的主要方法: - `setHeader(String name, String value)`:设置响应头的值。 - `setStatus(int sc)`:设置响应的状态码。 - `getWriter()`:获取用于向响应中写入字符的PrintWriter对象。 - `sendRedirect(String location)`:重定向到指定的URL。 - `getOutputStream()`:获取用于向响应中写入字节的ServletOutputStream对象。 以下是HttpServletRequest和HttpServletResponse的示例代码: ```java import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet("/example") public class ExampleServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String name = request.getParameter("name"); String message = "Hello, " + name + "!"; response.setContentType("text/plain"); response.setCharacterEncoding("UTF-8"); response.getWriter().write(message); } } ``` 在这个示例中,我们创建了一个名为ExampleServlet的Servlet,在浏览器发送GET请求到"/example"时,会触发doGet()方法。在doGet()方法中,我们使用HttpServletRequest的`getParameter()`方法获取名为"name"的请求参数的值。然后,我们使用HttpServletResponse的`getWriter()`方法获取一个PrintWriter对象,并使用其`write()`方法将响应消息写入响应中。设置响应的内容类型为"text/plain",字符编码为"UTF-8"。 这样,当我们在浏览器中访问http://localhost:8080/example?name=John,会得到响应消息 "Hello, John!"。