cas server (4.2.7) 新增驗證碼

添加驗證碼

 

•   修改casLoginView.jsp

  <!--驗證碼開始--->
     <div class="vCodeBox imgCode" >
            <input name = "j_captcha_response" type = "text" tabindex="3" class="formInt" placeholder="請輸入驗證碼" />
            <span class="vCodeImg">
            <img id="verifyCode_img" title="看不清楚，請從新點擊" src="captcha.htm" onclick="this.src=this.src+'?';"/>
            </span>
    </div>
    <!--驗證碼結束-->
       <div>
            <!--驗證碼錯誤提示-->
               <c:if test="${not empty captchaValidatorError}">
               <jsp:forward page="casLoginViewValidatorWarn.jsp" />
               </c:if> 
       </div>

•     在 login-webflow.xml 添加驗證碼 以下

<view-state id="viewLoginForm" view="casLoginView" model="credential">
        <binder>
            <binding property="username" required="true"/>
            <binding property="password" required="true"/>
            <binding property="j_captcha_response" required="true"/>
            <!--<binding property="rememberMe" />-->
        </binder>
        <on-entry>
            <set name="viewScope.commandName" value="'credential'"/>
            <!--
            <evaluate expression="samlMetadataUIParserAction" />
            -->
        </on-entry>
        <transition on="submit" bind="true" validate="true" to="captchaValidate"/>
    </view-state>
 <action-state id="captchaValidate">
         <evaluate expression="captchaValidateAction"/>
            <transition on="success" to="realSubmit" />
            <transition on="error" to="viewLoginForm" />
    </action-state>

• 在 applicationContext.xml配置

<bean id="handlerMappingC" 
    class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"
          p:order="1000"
          p:alwaysUseFullPath="true">
        <property name="mappings">
            <util:properties>
                <prop key="/authorizationFailure.html">passThroughController</prop>
                <prop key="/statistics/ping">pingController</prop>
                <prop key="/statistics/threads">threadsController</prop>
                <prop key="/statistics/metrics">metricsController</prop>
                <prop key="/statistics/healthcheck">healthController</prop>
                <prop key="/captcha.htm">captchaImageCreateController</prop> <!--添加驗證碼-->
            </util:properties>
        </property>
    </bean>
    
    <!--新增內容  -->
        <bean id="captchaErrorCountAction" class="com.ist.cas.CaptchaErrorCountAction"/>         
    <bean id="captchaValidateAction" class="com.ist.cas.CaptchaValidateAction"       
            p:captchaService-ref="jcaptchaService"       
            p:captchaValidationParameter="j_captcha_response"/>        
    <bean id="captchaImageCreateController"  class="com.ist.cas.CaptchaImageCreateController">       
            <property name="jcaptchaService" ref="jcaptchaService"/>        
    </bean>        
    <bean id="fastHashMapCaptchaStore" class="com.octo.captcha.service.captchastore.FastHashMapCaptchaStore" />    
    <bean id="jcaptchaService" class="com.octo.captcha.service.image.DefaultManageableImageCaptchaService">        
            <constructor-arg type="com.octo.captcha.service.captchastore.CaptchaStore" index="0">            
                <ref bean="fastHashMapCaptchaStore"/>        
            </constructor-arg>        
            <constructor-arg type="com.octo.captcha.engine.CaptchaEngine" index="1">            
                    <bean class="com.ist.cas.JCaptchaEngineEx"/>        
            </constructor-arg>        
            <constructor-arg index="2">            
                <value>180</value>        
            </constructor-arg>        
            <constructor-arg index="3">            
                <value>100000</value>        
            </constructor-arg>        
            <constructor-arg index="4">            
                <value>75000</value>        
            </constructor-arg>    
    </bean>

    com.ist.cas包下是驗證碼對應的後臺代碼

    CaptchaErrorCountAction 類以下：

package com.ist.cas;

import org.springframework.webflow.action.AbstractAction;
import org.springframework.webflow.execution.Event;
import org.springframework.webflow.execution.RequestContext;

public final class CaptchaErrorCountAction extends AbstractAction {
	protected Event doExecute(final RequestContext context) {
		int count;
		try {
			count = (Integer) context.getFlowScope().get("count");
		} catch (Exception e) {
			count = 0;
		}
		count++;
		context.getFlowScope().put("count", count);
		return success();
	}
}

CaptchaImageCreateController

package com.ist.cas;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import com.octo.captcha.service.image.ImageCaptchaService;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
 

public class CaptchaImageCreateController implements Controller,InitializingBean {

	private ImageCaptchaService jcaptchaService;

	public CaptchaImageCreateController() {

	}

	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		 /* byte captchaChallengeAsJpeg[] = null;
	      ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
	      String captchaId = request.getSession().getId();
	      java.awt.image.BufferedImage challenge=jcaptchaService.getImageChallengeForID(captchaId,request.getLocale());
	      JPEGImageEncoder jpegEncoder = JPEGCodec.createJPEGEncoder(jpegOutputStream);

	      jpegEncoder.encode(challenge);
	      captchaChallengeAsJpeg = jpegOutputStream.toByteArray();response.setHeader("Cache-Control", "no-store");
	      response.setHeader("Pragma", "no-cache");
	      response.setDateHeader("Expires", 0L);
	      response.setContentType("image/jpeg");
	      ServletOutputStream responseOutputStream = response.getOutputStream();
	      responseOutputStream.write(captchaChallengeAsJpeg);
	      responseOutputStream.flush();
	      responseOutputStream.close();*/
		int width = 82;
		int height = 42;
		Random random = new Random();
	
		// 設置response頭信息 禁止緩存
		response.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-Control", "no-cache");
		response.setDateHeader("Expires", 0);
	
		// 生成緩衝區image類
		BufferedImage image = new BufferedImage(width, height, 1);
		// 產生image類的Graphics用於繪製操做
		Graphics g = image.getGraphics();
		// Graphics類的樣式
		g.setColor(this.getRandColor(200, 250));
		g.setFont(new Font("Times New Roman", 0, 28));
		g.fillRect(0, 0, width, height);
		// 繪製干擾線
		for (int i = 0; i < 40; i++) {
			g.setColor(this.getRandColor(130, 200));
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int x1 = random.nextInt(12);
			int y1 = random.nextInt(12);
			g.drawLine(x, y, x + x1, y + y1);
		}
	
		// 繪製字符
		String strCode = "";
		for (int i = 0; i < 4; i++) {
			String rand = String.valueOf(random.nextInt(10));
			strCode = strCode + rand;
			g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
			g.drawString(rand, 13 * i + 6, 28);
		}
		// 將字符保存到session中用於前端的驗證
	//	session.setAttribute("verifycode", strCode);
		request.getSession().setAttribute("verifycode", strCode);
		g.dispose();
		ImageIO.write(image, "JPEG", response.getOutputStream());
		response.getOutputStream().flush();
	      return null;
	}
	/**
	 * 顏色
	 * @param fc
	 * @param bc
	 * @return
	 */
	private Color getRandColor(int fc, int bc) {
		Random random = new Random();
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}
	
	public void setJcaptchaService(ImageCaptchaService jcaptchaService) {
		this.jcaptchaService = jcaptchaService;
	}

	public void afterPropertiesSet() throws Exception {
		if (jcaptchaService == null)
			throw new RuntimeException("Image captcha service wasn`t set!");
		else
			return;
	}
}

•      在web.xml文件中 添加驗證

<servlet-mapping>
        <servlet-name>cas</servlet-name>
        <url-pattern>/captcha.htm</url-pattern>
 </servlet-mapping>