看了很多添加验证码的博文,唯独没有4.24的 重点看第3条,其余的和别人博文大致相同
1.首先在cas工程的web.xml增加验证码功能的支持
<!-- 验证码功能 -->
<servlet>
<servlet-name>Kaptcha</servlet-name>
<servlet-class>com.google.code.kaptcha.servlet.KaptchaServlet</servlet-class>
<init-param>
<param-name>kaptcha.border</param-name>
<param-value>no</param-value>
</init-param>
<init-param>
<param-name>kaptcha.textproducer.char.space</param-name>
<param-value>5</param-value>
</init-param>
<init-param>
<param-name>kaptcha.textproducer.char.length</param-name>
<param-value>5</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>Kaptcha</servlet-name>
<url-pattern>/captcha.jpg</url-pattern>
</servlet-mapping>
2.新建一个类UsernamePasswordCredentialWithAuthCode,该类继承了
org.jasig.cas.authentication.UsernamePasswordCredential，添加一个验证码字段，
并且重写equals和hashCode方法，添加关于验证码比较的信息
package org.jasig.cas.web.flow;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.jasig.cas.authentication.UsernamePasswordCredential;
public class UsernamePasswordCredentialWithAuthCode extends
UsernamePasswordCredential {
/**
* 带验证码的登录界面
*/
private static final long serialVersionUID = 1L;
/** 验证码*/
@NotNull
@Size(min = 1, message = "required.authcode")
private String authcode;
/**
*
* @return
*/
public final String getAuthcode() {
return authcode;
}
/**
*
* @param authcode
*/
public final void setAuthcode(String authcode) {
this.authcode = authcode;
}
public UsernamePasswordCredentialWithAuthCode() {
super();
}
public UsernamePasswordCredentialWithAuthCode(String userName,
String password) {
super(userName, password);
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final UsernamePasswordCredentialWithAuthCode that = (UsernamePasswordCredentialWithAuthCode) o;
if (getPassword() != null ? !getPassword().equals(that.getPassword())
: that.getPassword() != null) {
return false;
}
if (getPassword() != null ? !getPassword().equals(that.getPassword())
: that.getPassword() != null) {
return false;
}
if (authcode != null ? !authcode.equals(that.authcode)
: that.authcode != null)
return false;
return true;
}
@Override
public int hashCode() {
return new HashCodeBuilder().append(getUsername())
.append(getPassword()).append(authcode).toHashCode();
}
}
3.新建一个类AuthenticationViaFormAction类，必须写在org.jasig.cas.web.flow包中,原因我是修改源码,红色为添加代码：这样做的原因是因为我实在无法找到去哪里配置bean,看他源码是注解,我配上注解也不管用,也懒得去研究,就这样弄吧!
package org.jasig.cas.web.flow;
import org.apache.commons.lang3.StringUtils;
import org.jasig.cas.CasProtocolConstants;
import org.jasig.cas.CentralAuthenticationService;
import org.jasig.cas.authentication.AuthenticationContext;
import org.jasig.cas.authentication.AuthenticationContextBuilder;
import org.jasig.cas.authentication.AuthenticationException;
import org.jasig.cas.authentication.AuthenticationSystemSupport;
import org.jasig.cas.authentication.AuthenticationTransaction;
import org.jasig.cas.authentication.Credential;
import org.jasig.cas.authentication.DefaultAuthenticationContextBuilder;
import org.jasig.cas.authentication.DefaultAuthenticationSystemSupport;
import org.jasig.cas.authentication.HandlerResult;
import org.jasig.cas.authentication.MessageDescriptor;
import org.jasig.cas.authentication.RootCasException;
import org.jasig.cas.authentication.principal.Service;
import org.jasig.cas.ticket.AbstractTicketException;
import org.jasig.cas.ticket.ServiceTicket;
import org.jasig.cas.ticket.TicketCreationException;
import org.jasig.cas.ticket.TicketGrantingTicket;
import org.jasig.cas.web.support.WebUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.binding.message.MessageBuilder;
import org.springframework.binding.message.MessageContext;
import org.springframework.stereotype.Component;
import org.springframework.web.util.CookieGenerator;
import org.springframework.webflow.core.collection.LocalAttributeMap;
import org.springframework.webflow.execution.Event;
import org.springframework.webflow.execution.RequestContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.validation.constraints.NotNull;
import Java.util.Map;
/**
* Action to authenticate credential and retrieve a TicketGrantingTicket for
* those credential. If there is a request for renew, then it also generates
* the Service Ticket required.
*
* @author Scott Battaglia
* @since 3.0.0
*/
@Component("authenticationViaFormAction")
public class AuthenticationViaFormAction {
/** Authentication succeeded with warnings from authn subsystem that should be displayed to user. */
public static final String SUCCESS_WITH_WARNINGS = "successWithWarnings";
/** Authentication failure result. */
public static final String AUTHENTICATION_FAILURE = "authenticationFailure";
/** Flow scope attribute that determines if authn is happening at a public workstation. */
public static final String PUBLIC_WORKSTATION_ATTRIBUTE = "publicWorkstation";
/** Logger instance. **/
protected final transient Logger logger = LoggerFactory.getLogger(getClass());
/** Core we delegate to for handling all ticket related tasks. */
@NotNull
@Autowired
@Qualifier("centralAuthenticationService")
private CentralAuthenticationService centralAuthenticationService;
@NotNull
@Autowired
@Qualifier("warnCookieGenerator")
private CookieGenerator warnCookieGenerator;
@NotNull
@Autowired(required=false)
@Qualifier("defaultAuthenticationSystemSupport")
private AuthenticationSystemSupport authenticationSystemSupport = new DefaultAuthenticationSystemSupport();
/**
* Handle the submission of credentials from the post.
*
* @param context the context
* @param credential the credential
* @param messageContext the message context
* @return the event
* @since 4.1.0
*/
public final Event submit(final RequestContext context, final Credential credential,
final MessageContext messageContext) {
if (isRequestAskingForServiceTicket(context)) {
return grantServiceTicket(context, credential);
}
return createTicketGrantingTicket(context, credential, messageContext);
}
/**
* Is request asking for service ticket?
*
* @param context the context
* @return true, if both service and tgt are found, and the request is not asking to renew.
* @since 4.1.0
*/
protected boolean isRequestAskingForServiceTicket(final RequestContext context) {
final String ticketGrantingTicketId = WebUtils.getTicketGrantingTicketId(context);
final Service service = WebUtils.getService(context);
return (StringUtils.isNotBlank(context.getRequestParameters().get(CasProtocolConstants.PARAMETER_RENEW))
&& ticketGrantingTicketId != null
&& service != null);
}
/**
* Grant service ticket for the given credential based on the service and tgt
* that are found in the request context.
*
* @param context the context
* @param credential the credential
* @return the resulting event. Warning, authentication failure or error.
* @since 4.1.0
*/
protected Event grantServiceTicket(final RequestContext context, final Credential credential) {
final String ticketGrantingTicketId = WebUtils.getTicketGrantingTicketId(context);
try {
final Service service = WebUtils.getService(context);
final AuthenticationContextBuilder builder = new DefaultAuthenticationContextBuilder(
this.authenticationSystemSupport.getPrincipalElectionStrategy());
final AuthenticationTransaction transaction =
AuthenticationTransaction.wrap(credential);
this.authenticationSystemSupport.getAuthenticationTransactionManager().handle(transaction, builder);
final AuthenticationContext authenticationContext = builder.build(service);
final ServiceTicket serviceTicketId = this.centralAuthenticationService.grantServiceTicket(
ticketGrantingTicketId, service, authenticationContext);
WebUtils.putServiceTicketInRequestScope(context, serviceTicketId);
WebUtils.putWarnCookieIfRequestParameterPresent(this.warnCookieGenerator, context);
return newEvent(AbstractCasWebflowConfigurer.TRANSITION_ID_WARN);
} catch (final AuthenticationException e) {
return newEvent(AUTHENTICATION_FAILURE, e);
} catch (final TicketCreationException e) {
logger.warn("Invalid attempt to access service using renew=true with different credential. Ending SSO session.");
this.centralAuthenticationService.destroyTicketGrantingTicket(ticketGrantingTicketId);
} catch (final AbstractTicketException e) {
return newEvent(AbstractCasWebflowConfigurer.TRANSITION_ID_ERROR, e);
}
return newEvent(AbstractCasWebflowConfigurer.TRANSITION_ID_ERROR);
}
/**
* Create ticket granting ticket for the given credentials.
* Adds all warnings into the message context.
*
* @param context the context
* @param credential the credential
* @param messageContext the message context
* @return the resulting event.
* @since 4.1.0
*/
protected Event createTicketGrantingTicket(final RequestContext context, final Credential credential,
final MessageContext messageContext) {
try {
final Service service = WebUtils.getService(context);
final AuthenticationContextBuilder builder = new DefaultAuthenticationContextBuilder(
this.authenticationSystemSupport.getPrincipalElectionStrategy());
final AuthenticationTransaction transaction =
AuthenticationTransaction.wrap(credential);
this.authenticationSystemSupport.getAuthenticationTransactionManager().handle(transaction, builder);
final AuthenticationContext authenticationContext = builder.build(service);
final TicketGrantingTicket tgt = this.centralAuthenticationService.createTicketGrantingTicket(authenticationContext);
WebUtils.putTicketGrantingTicketInScopes(context, tgt);
WebUtils.putWarnCookieIfRequestParameterPresent(this.warnCookieGenerator, context);
putPublicWorkstationToFlowIfRequestParameterPresent(context);
if (addWarningMessagesToMessageContextIfNeeded(tgt, messageContext)) {
return newEvent(SUCCESS_WITH_WARNINGS);
}
return newEvent(AbstractCasWebflowConfigurer.TRANSITION_ID_SUCCESS);
} catch (final AuthenticationException e) {
logger.debug(e.getMessage(), e);
return newEvent(AUTHENTICATION_FAILURE, e);
} catch (final Exception e) {
logger.debug(e.getMessage(), e);
return newEvent(AbstractCasWebflowConfigurer.TRANSITION_ID_ERROR, e);
}
}
/**
* Add warning messages to message context if needed.
*
* @param tgtId the tgt id
* @param messageContext the message context
* @return true if warnings were found and added, false otherwise.
* @since 4.1.0
*/
protected boolean addWarningMessagesToMessageContextIfNeeded(final TicketGrantingTicket tgtId, final MessageContext messageContext) {
boolean foundAndAddedWarnings = false;
for (final Map.Entry<String, HandlerResult> entry : tgtId.getAuthentication().getSuccesses().entrySet()) {
for (final MessageDescriptor message : entry.getValue().getWarnings()) {
addWarningToContext(messageContext, message);
foundAndAddedWarnings = true;
}
}
return foundAndAddedWarnings;
}
/**
* Put public workstation into the flow if request parameter present.
*
* @param context the context
*/
private static void putPublicWorkstationToFlowIfRequestParameterPresent(final RequestContext context) {
if (StringUtils.isNotBlank(context.getExternalContext()
.getRequestParameterMap().get(PUBLIC_WORKSTATION_ATTRIBUTE))) {
context.getFlowScope().put(PUBLIC_WORKSTATION_ATTRIBUTE, Boolean.TRUE);
}
}
/**
* New event based on the given id.
*
* @param id the id
* @return the event
*/
private Event newEvent(final String id) {
return new Event(this, id);
}
/**
* New event based on the id, which contains an error attribute referring to the exception occurred.
*
* @param id the id
* @param error the error
* @return the event
*/
private Event newEvent(final String id, final Exception error) {
return new Event(this, id, new LocalAttributeMap("error", error));
}
/**
* Adds a warning message to the message context.
*
* @param context Message context.
* @param warning Warning message.
*/
private static void addWarningToContext(final MessageContext context, final MessageDescriptor warning) {
final MessageBuilder builder = new MessageBuilder()
.warning()
.code(warning.getCode())
.defaultText(warning.getDefaultMessage())
.args(warning.getParams());
context.addMessage(builder.build());
}
public void setCentralAuthenticationService(final CentralAuthenticationService centralAuthenticationService) {
this.centralAuthenticationService = centralAuthenticationService;
}
public void setWarnCookieGenerator(final CookieGenerator warnCookieGenerator) {
this.warnCookieGenerator = warnCookieGenerator;
}
public void setAuthenticationSystemSupport(final AuthenticationSystemSupport authenticationSystemSupport) {
this.authenticationSystemSupport = authenticationSystemSupport;
}
public final String validatorCode(final RequestContext context,
final Credential credentials, final MessageContext messageContext)
throws Exception {
final HttpServletRequest request = WebUtils
.getHttpServletRequest(context);
HttpSession session = request.getSession();
//生成的验证码
String authcode = (String) session
.getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
session.removeAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
UsernamePasswordCredentialWithAuthCode upc = (UsernamePasswordCredentialWithAuthCode) credentials;
//用户 输入的验证码
String submitAuthcode = upc.getAuthcode();
if (StringUtils.isEmpty(submitAuthcode)
|| StringUtils.isEmpty(authcode)) {
populateErrorsInstance(new NullAuthcodeAuthenticationException(),
messageContext);
return "error";
}
if (submitAuthcode.equalsIgnoreCase(authcode)) {
return "success";
}
populateErrorsInstance(new BadAuthcodeAuthenticationException(),
messageContext);
return "error";
}
private void populateErrorsInstance(final RootCasException e,
final MessageContext messageContext) {
try {
messageContext.addMessage(new MessageBuilder().error()
.code(e.getCode()).defaultText(e.getCode()).build());
} catch (final Exception fe) {
logger.error(fe.getMessage(), fe);
}
}
}
4.定义异常类NullAuthcodeAuthenticationException和BadAuthcodeAuthenticationException：
package org.jasig.cas.web.flow;
import org.jasig.cas.authentication.RootCasException;
public class NullAuthcodeAuthenticationException extends RootCasException {
/** Serializable ID for unique id. */
private static final long serialVersionUID = 5501212207531289993L;
/** Code description. */
public static final String CODE = "required.authcode";
/**
* Constructs a TicketCreationException with the default exception code.
*/
public NullAuthcodeAuthenticationException() {
super(CODE);
}
/**
* Constructs a TicketCreationException with the default exception code and
* the original exception that was thrown.
*
* @param throwable
* the chained exception
*/
public NullAuthcodeAuthenticationException(final Throwable throwable) {
super(CODE, throwable);
}
}
----------------------------------------------------------------------------------------------------------------------------------
package org.jasig.cas.web.flow;
import org.jasig.cas.authentication.RootCasException;
public class BadAuthcodeAuthenticationException extends RootCasException {
/** Serializable ID for unique id. */
private static final long serialVersionUID = 5501212207531289993L;
/** Code description. */
public static final String CODE = "error.authentication.authcode.bad";
/**
* Constructs a TicketCreationException with the default exception code.
*/
public BadAuthcodeAuthenticationException() {
super(CODE);
}
/**
* Constructs a TicketCreationException with the default exception code and
* the original exception that was thrown.
*
* @param throwable
* the chained exception
*/
public BadAuthcodeAuthenticationException(final Throwable throwable) {
super(CODE, throwable);
}
}
5、在login_webflow.xml修改登录验证流程：
修改UsernamePasswordCredentialWithAuthCode你自己定义的路劲
验证码校验:
<transition on="submit" bind="true" validate="true"
to="validatorCode" />
<!-- <transition on="submit" bind="true" validate="true" to="realSubmit"
/> -->
</view-state>
<!-- 新添加的校验验证码 -->
<action-state id="validatorCode">
<evaluate
expression="authenticationViaFormAction.validatorCode(flowRequestContext, flowScope.credential, messageContext)" />
<transition on="error" to="generateLoginTicket"/>
<transition on="success" to="realSubmit" />
</action-state>
6、messages_zh_CN.properties增加国际化显示信息:
screen.welcome.label.authcode=u9A8Cu8BC1u7801:
screen.welcome.label.authcode.accesskey=a
required.authcode=u5FC5u987Bu5F55u5165u9A8Cu8BC1u7801u3002
error.authentication.authcode.bad=u9A8Cu8BC1u7801u8F93u5165u6709u8BEFu3002
7.登录页面casLoginView.jsp添加验证码输入框：
<!-- 验证码 -->
<spring:message code="screen.welcome.label.authcode" />
<img onclick="this.src='captcha.jpg?'+Math.random()" width="93"
height="30" src="captcha.jpg">
<div class="login-ic">
<i class="icys"></i>
<form:input cssClass="required" cssErrorClass="error" id="authcode"
size="10" tabindex="2" path="authcode"
accesskey="${authcodeAccessKey}" htmlEscape="true"
autocomplete="off" />
<div class="clear"></div>
</div>
8、如果要默认中文页面显示，修改cas-servlet.xml 下的local Resolver默认值为zh_CN：
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" p:defaultLocale="zh_CN" />