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How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl

How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl

思路
首先BasePage是需要登陆的 protected ,
BasePage实现org.apache.tapestry.event.PageValidateListener方法,判断asm对象Visit是否已经登陆
如没visit==null,去cookies找回用户名和密码从cycle中获得Login页面
Login页面实现common.tapestry.IConstructVisit接口。LoginPage登陆时保存用户名密码到cookies中,并对cookies的值加密,
cookies的key是baseUrl+key,取回时对cookies值解密,加密解密的password放到Application的meta信息中

实现代码如下
抽象接口LoginCookiesManager

package common.tapestry.engine;

public interface LoginCookiesManager {
 
 String APPLICATION_META_KEY_DEFAULT_COOKIES_IS_ENCRYPTION = "common.tapestry.default-cookies-encrypt";//是否需要加密,默认加密
 String APPLICATION_META_KEY_DEFAULT_COOKIES_ENCRYPTION_KEY = "common.tapestry.default-cookies-encryption-key";//加密的password

 public static final String COOKIES_KEY_LOGIN_USERNAME = "USERNAME";
 public static final String COOKIES_KEY_LOGIN_PASSWORD = "PASSWORD";
 
 /**
  * 将用户名和密码写入cookies
  * @param username
  * @param password
  * @param maxAge
  */
 void writeCookies(String username,String password,int maxAge);
 /**
  * 清除用户名和密码cookies
  */
 void removeCookies();
 /**
  * 从cookies中获得用户名
  * @return
  */
 String getUsername();
 /**
  * 从cookies中获得密码
  * @return
  */
 String getPassword();
}

LoginCookiesManagerImpl 实现

package common.tapestry.engine;

import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.tapestry.engine.IPropertySource;
import org.apache.tapestry.services.AbsoluteURLBuilder;
import org.apache.tapestry.services.CookieSource;
import org.apache.tapestry.web.WebRequest;
import org.jasypt.encryption.pbe.StandardPBEStringEncryptor;
import org.jasypt.exceptions.EncryptionOperationNotPossibleException;

public class LoginCookiesManagerImpl implements LoginCookiesManager {
 private static StandardPBEStringEncryptor standardPBEStringEncryptor = new StandardPBEStringEncryptor();
 private IPropertySource applicationPropertySource;
 private CookieSource cookieSource;
 private WebRequest request;
 private AbsoluteURLBuilder absoluteURLBuilder;

 public void setApplicationPropertySource(
   IPropertySource applicationPropertySource) {
  this.applicationPropertySource = applicationPropertySource;
  String encrypKey = getCookiesEncryptionKey();
  standardPBEStringEncryptor.setPassword(encrypKey);
 }

 private String decrypt(String value) {
  String tmp = value;
  try {
   tmp = standardPBEStringEncryptor.decrypt(value);
  } catch (EncryptionOperationNotPossibleException e) {
   throw new ApplicationRuntimeException("please clear your cookies");
  }
  return tmp;
 }

 private String encrypt(String value) {
  return standardPBEStringEncryptor.encrypt(value);
 }

 private String getCookiesEncryptionKey() {
  String temp = applicationPropertySource
    .getPropertyValue(APPLICATION_META_KEY_DEFAULT_COOKIES_ENCRYPTION_KEY);
  return (temp != null) ? temp : "crypassword";
 }

 private boolean isCookiesEncryption() {
  String temp = applicationPropertySource
    .getPropertyValue(APPLICATION_META_KEY_DEFAULT_COOKIES_IS_ENCRYPTION);
  return (temp != null) ? Boolean.valueOf(temp).booleanValue() : true;
 }

 public void removeCookies() {
  String cookiesKeyLogin_username = generateApplicationCookiesKey_Login__Username();
  String cookiesKeyLogin_password = generateApplicationCookiesKey_Login__Password();
  cookieSource.removeCookieValue(cookiesKeyLogin_username);
  cookieSource.removeCookieValue(cookiesKeyLogin_password);
 }

 public void writeCookies(String username, String password, int maxAge) {
  writeCookiesValue_Login__Username(username, maxAge);
  writeCookiesValue_Login__Password(password, maxAge);
 }

 public String getUsername() {
  String value = cookieSource
    .readCookieValue(generateApplicationCookiesKey_Login__Username());
  if (isCookiesEncryption()) {
   value = decrypt(value);
  }
  return value;
 }

 public String getPassword() {
  String value = cookieSource
    .readCookieValue(generateApplicationCookiesKey_Login__Password());
  if (isCookiesEncryption()) {
   value = decrypt(value);
  }
  return value;
 }

 private void writeCookiesValue_Login__Username(String username, int maxAge) {
  String key = generateApplicationCookiesKey_Login__Username();
  String value = username;
  if (isCookiesEncryption()) {
   value = encrypt(username);
  }
  cookieSource.writeCookieValue(key, value, maxAge);
 }

 private void writeCookiesValue_Login__Password(String password, int maxAge) {
  String key = generateApplicationCookiesKey_Login__Password();
  String value = password;
  if (isCookiesEncryption()) {
   value = encrypt(password);
  }
  cookieSource.writeCookieValue(key, value, maxAge);
 }

 private String generateApplicationCookiesKey_Login__Username() {
  return generateApplicationCookiesKey(COOKIES_KEY_LOGIN_USERNAME);
 }

 private String generateApplicationCookiesKey_Login__Password() {
  return generateApplicationCookiesKey(COOKIES_KEY_LOGIN_PASSWORD);
 }

 private String generateApplicationCookiesKey(String key) {
  String contextPath = request.getContextPath();
  return absoluteURLBuilder.constructURL(contextPath + "/") + key;
 }

 public void setCookieSource(CookieSource cookieSource) {
  this.cookieSource = cookieSource;
 }

 public void setRequest(WebRequest request) {
  this.request = request;
 }

 public void setAbsoluteURLBuilder(AbsoluteURLBuilder absoluteURLBuilder) {
  this.absoluteURLBuilder = absoluteURLBuilder;
 }

}

hivemodule.xml配置

<?xml version="1.0"?>
<module id="common.tapestry" version="1.0.0">
<service-point id="LoginCookiesManager" interface="common.tapestry.engine.LoginCookiesManager">
<invoke-factory>
   <construct class="common.tapestry.engine.LoginCookiesManagerImpl" >
     <set-object property="cookieSource" value="infrastructure:cookieSource"/>
     <set-service property="absoluteURLBuilder" service-id="tapestry.request.AbsoluteURLBuilder"/>
              <set-service property="request" service-id="tapestry.globals.WebRequest"/>  
              <set-object property="applicationPropertySource" value="service:tapestry.props.ApplicationPropertySource"/>             
      </construct>
  </invoke-factory> 
</service-point>

<contribution configuration-id="tapestry.Infrastructure">
    <property name="loginCookiesManager" object="service:common.tapestry.LoginCookiesManager"/>
</contribution>
</module>

使用

在BasePage中获得该service

public LoginCookiesManager getLoginCookiesManager() {
  LoginCookiesManager svc = (LoginCookiesManager) getRequestCycle().getInfrastructure().getProperty("loginCookiesManager");
  return svc;
 }
 
/**
  * 判断用户是否已经登陆
  *
  * @return
  */
 private boolean isUserLoggedIn() {
  Object asmVisit = this.getRequestCycle().getInfrastructure().getApplicationStateManager().get(ASM_VISIT);

  if (!(asmVisit instanceof IVisit)) {
   throw new ApplicationRuntimeException(
     "The visit class must implements " + IVisit.class);
  }
  IVisit visit = (IVisit) asmVisit;
  if (visit == null || (visit != null && !visit.isLoggedIn())) {
   IPage loginPage = getRequestCycle().getPage(PAGE_LOGIN);
   if (loginPage instanceof IConstructVisit) {
    //从cookies中找回用户名和密码
    String cookiesLoginUsername = getLoginCookiesManager().getUsername();
    String cookiesLoginPassword = getLoginCookiesManager().getPassword();
    IConstructVisit constructVisit = (IConstructVisit) loginPage;
    visit = constructVisit.doConstructVisit(this.getRequestCycle(),
      cookiesLoginUsername, cookiesLoginPassword);
   } else {
    throw new ApplicationRuntimeException("The " + PAGE_LOGIN
      + " class must implements " + IConstructVisit.class);
   }
  }
  if (visit == null)
   return Boolean.FALSE.booleanValue();
  return visit.isLoggedIn();
 } 


Login类必须实现如下接口
package common.tapestry;

import org.apache.tapestry.IRequestCycle;

public interface IConstructVisit {
 public IVisit doConstructVisit(IRequestCycle cycle, String username,String password);
}

 
系原创
其他blog地址  http://oxyc.spaces.live.com/
                         http://hiok.blog.sohu.com

posted on 2008-03-24 15:26 bluesky 阅读(3675) 评论(5)  编辑  收藏 所属分类: 工作总结

评论

# re: How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl[未登录] 2008-09-11 20:30 kelly

是不是不全啊!能不能也写全一下!谢谢!
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# re: How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl 2008-09-12 21:05 bluesky

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# re: How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl[未登录] 2008-09-16 09:37 kelly

ASM_VISIT,PAGE_LOGIN是什么东东啊?IVisit又是什么东东啊?IConstructVisit这个接口又有什么作用啊?能否给予一个具体一点是列啊!刚研究!请赐教!非常感激!
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# re: How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl[未登录] 2008-09-16 09:52 kelly

能否写个简单的登陆的示例给我?非常感谢!
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# re: How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl 2008-09-19 22:03 bluesky

你需要自己扩展org.apache.tapestry.html.BasePage基类并实现 org.apache.tapestry.event.PageValidateListener
void pageValidate(PageEvent event);方法内通过
org.apache.tapestry.services.CookieSource把用户名和密码从cookies中找回来然后调用登录业务逻辑,然后继续决定是否跳转登录Login还是继续Render该Page
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